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From omal...@apache.org
Subject [17/37] hive git commit: HIVE-17118. Move the hive-orc source files to make the package names unique.
Date Wed, 19 Jul 2017 16:58:40 GMT
http://git-wip-us.apache.org/repos/asf/hive/blob/df8921d8/orc/src/java/org/apache/orc/impl/RunLengthByteWriter.java
----------------------------------------------------------------------
diff --git a/orc/src/java/org/apache/orc/impl/RunLengthByteWriter.java b/orc/src/java/org/apache/orc/impl/RunLengthByteWriter.java
deleted file mode 100644
index 09108b2..0000000
--- a/orc/src/java/org/apache/orc/impl/RunLengthByteWriter.java
+++ /dev/null
@@ -1,106 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.orc.impl;
-
-import java.io.IOException;
-
-/**
- * A streamFactory that writes a sequence of bytes. A control byte is written before
- * each run with positive values 0 to 127 meaning 2 to 129 repetitions. If the
- * bytes is -1 to -128, 1 to 128 literal byte values follow.
- */
-public class RunLengthByteWriter {
-  static final int MIN_REPEAT_SIZE = 3;
-  static final int MAX_LITERAL_SIZE = 128;
-  static final int MAX_REPEAT_SIZE= 127 + MIN_REPEAT_SIZE;
-  private final PositionedOutputStream output;
-  private final byte[] literals = new byte[MAX_LITERAL_SIZE];
-  private int numLiterals = 0;
-  private boolean repeat = false;
-  private int tailRunLength = 0;
-
-  public RunLengthByteWriter(PositionedOutputStream output) {
-    this.output = output;
-  }
-
-  private void writeValues() throws IOException {
-    if (numLiterals != 0) {
-      if (repeat) {
-        output.write(numLiterals - MIN_REPEAT_SIZE);
-        output.write(literals, 0, 1);
-     } else {
-        output.write(-numLiterals);
-        output.write(literals, 0, numLiterals);
-      }
-      repeat = false;
-      tailRunLength = 0;
-      numLiterals = 0;
-    }
-  }
-
-  public void flush() throws IOException {
-    writeValues();
-    output.flush();
-  }
-
-  public void write(byte value) throws IOException {
-    if (numLiterals == 0) {
-      literals[numLiterals++] = value;
-      tailRunLength = 1;
-    } else if (repeat) {
-      if (value == literals[0]) {
-        numLiterals += 1;
-        if (numLiterals == MAX_REPEAT_SIZE) {
-          writeValues();
-        }
-      } else {
-        writeValues();
-        literals[numLiterals++] = value;
-        tailRunLength = 1;
-      }
-    } else {
-      if (value == literals[numLiterals - 1]) {
-        tailRunLength += 1;
-      } else {
-        tailRunLength = 1;
-      }
-      if (tailRunLength == MIN_REPEAT_SIZE) {
-        if (numLiterals + 1 == MIN_REPEAT_SIZE) {
-          repeat = true;
-          numLiterals += 1;
-        } else {
-          numLiterals -= MIN_REPEAT_SIZE - 1;
-          writeValues();
-          literals[0] = value;
-          repeat = true;
-          numLiterals = MIN_REPEAT_SIZE;
-        }
-      } else {
-        literals[numLiterals++] = value;
-        if (numLiterals == MAX_LITERAL_SIZE) {
-          writeValues();
-        }
-      }
-    }
-  }
-
-  public void getPosition(PositionRecorder recorder) throws IOException {
-    output.getPosition(recorder);
-    recorder.addPosition(numLiterals);
-  }
-}

http://git-wip-us.apache.org/repos/asf/hive/blob/df8921d8/orc/src/java/org/apache/orc/impl/RunLengthIntegerReader.java
----------------------------------------------------------------------
diff --git a/orc/src/java/org/apache/orc/impl/RunLengthIntegerReader.java b/orc/src/java/org/apache/orc/impl/RunLengthIntegerReader.java
deleted file mode 100644
index b91a263..0000000
--- a/orc/src/java/org/apache/orc/impl/RunLengthIntegerReader.java
+++ /dev/null
@@ -1,173 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.orc.impl;
-
-import java.io.EOFException;
-import java.io.IOException;
-
-import org.apache.hadoop.hive.ql.exec.vector.ColumnVector;
-
-/**
- * A reader that reads a sequence of integers.
- * */
-public class RunLengthIntegerReader implements IntegerReader {
-  private InStream input;
-  private final boolean signed;
-  private final long[] literals =
-    new long[RunLengthIntegerWriter.MAX_LITERAL_SIZE];
-  private int numLiterals = 0;
-  private int delta = 0;
-  private int used = 0;
-  private boolean repeat = false;
-  private SerializationUtils utils;
-
-  public RunLengthIntegerReader(InStream input, boolean signed) throws IOException {
-    this.input = input;
-    this.signed = signed;
-    this.utils = new SerializationUtils();
-  }
-
-  private void readValues(boolean ignoreEof) throws IOException {
-    int control = input.read();
-    if (control == -1) {
-      if (!ignoreEof) {
-        throw new EOFException("Read past end of RLE integer from " + input);
-      }
-      used = numLiterals = 0;
-      return;
-    } else if (control < 0x80) {
-      numLiterals = control + RunLengthIntegerWriter.MIN_REPEAT_SIZE;
-      used = 0;
-      repeat = true;
-      delta = input.read();
-      if (delta == -1) {
-        throw new EOFException("End of stream in RLE Integer from " + input);
-      }
-      // convert from 0 to 255 to -128 to 127 by converting to a signed byte
-      delta = (byte) (0 + delta);
-      if (signed) {
-        literals[0] = utils.readVslong(input);
-      } else {
-        literals[0] = utils.readVulong(input);
-      }
-    } else {
-      repeat = false;
-      numLiterals = 0x100 - control;
-      used = 0;
-      for(int i=0; i < numLiterals; ++i) {
-        if (signed) {
-          literals[i] = utils.readVslong(input);
-        } else {
-          literals[i] = utils.readVulong(input);
-        }
-      }
-    }
-  }
-
-  @Override
-  public boolean hasNext() throws IOException {
-    return used != numLiterals || input.available() > 0;
-  }
-
-  @Override
-  public long next() throws IOException {
-    long result;
-    if (used == numLiterals) {
-      readValues(false);
-    }
-    if (repeat) {
-      result = literals[0] + (used++) * delta;
-    } else {
-      result = literals[used++];
-    }
-    return result;
-  }
-
-  @Override
-  public void nextVector(ColumnVector previous,
-                         long[] data,
-                         int previousLen) throws IOException {
-    previous.isRepeating = true;
-    for (int i = 0; i < previousLen; i++) {
-      if (!previous.isNull[i]) {
-        data[i] = next();
-      } else {
-        // The default value of null for int type in vectorized
-        // processing is 1, so set that if the value is null
-        data[i] = 1;
-      }
-
-      // The default value for nulls in Vectorization for int types is 1
-      // and given that non null value can also be 1, we need to check for isNull also
-      // when determining the isRepeating flag.
-      if (previous.isRepeating
-          && i > 0
-          && (data[0] != data[i] || previous.isNull[0] != previous.isNull[i])) {
-        previous.isRepeating = false;
-      }
-    }
-  }
-
-  @Override
-  public void nextVector(ColumnVector vector,
-                         int[] data,
-                         int size) throws IOException {
-    if (vector.noNulls) {
-      for(int r=0; r < data.length && r < size; ++r) {
-        data[r] = (int) next();
-      }
-    } else if (!(vector.isRepeating && vector.isNull[0])) {
-      for(int r=0; r < data.length && r < size; ++r) {
-        if (!vector.isNull[r]) {
-          data[r] = (int) next();
-        } else {
-          data[r] = 1;
-        }
-      }
-    }
-  }
-
-  @Override
-  public void seek(PositionProvider index) throws IOException {
-    input.seek(index);
-    int consumed = (int) index.getNext();
-    if (consumed != 0) {
-      // a loop is required for cases where we break the run into two parts
-      while (consumed > 0) {
-        readValues(false);
-        used = consumed;
-        consumed -= numLiterals;
-      }
-    } else {
-      used = 0;
-      numLiterals = 0;
-    }
-  }
-
-  @Override
-  public void skip(long numValues) throws IOException {
-    while (numValues > 0) {
-      if (used == numLiterals) {
-        readValues(false);
-      }
-      long consume = Math.min(numValues, numLiterals - used);
-      used += consume;
-      numValues -= consume;
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/hive/blob/df8921d8/orc/src/java/org/apache/orc/impl/RunLengthIntegerReaderV2.java
----------------------------------------------------------------------
diff --git a/orc/src/java/org/apache/orc/impl/RunLengthIntegerReaderV2.java b/orc/src/java/org/apache/orc/impl/RunLengthIntegerReaderV2.java
deleted file mode 100644
index 610d9b5..0000000
--- a/orc/src/java/org/apache/orc/impl/RunLengthIntegerReaderV2.java
+++ /dev/null
@@ -1,406 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.orc.impl;
-
-import java.io.EOFException;
-import java.io.IOException;
-import java.util.Arrays;
-
-import org.apache.hadoop.hive.ql.exec.vector.ColumnVector;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * A reader that reads a sequence of light weight compressed integers. Refer
- * {@link RunLengthIntegerWriterV2} for description of various lightweight
- * compression techniques.
- */
-public class RunLengthIntegerReaderV2 implements IntegerReader {
-  public static final Logger LOG = LoggerFactory.getLogger(RunLengthIntegerReaderV2.class);
-
-  private InStream input;
-  private final boolean signed;
-  private final long[] literals = new long[RunLengthIntegerWriterV2.MAX_SCOPE];
-  private boolean isRepeating = false;
-  private int numLiterals = 0;
-  private int used = 0;
-  private final boolean skipCorrupt;
-  private final SerializationUtils utils;
-  private RunLengthIntegerWriterV2.EncodingType currentEncoding;
-
-  public RunLengthIntegerReaderV2(InStream input, boolean signed,
-      boolean skipCorrupt) throws IOException {
-    this.input = input;
-    this.signed = signed;
-    this.skipCorrupt = skipCorrupt;
-    this.utils = new SerializationUtils();
-  }
-
-  private final static RunLengthIntegerWriterV2.EncodingType[] encodings = RunLengthIntegerWriterV2.EncodingType.values();
-  private void readValues(boolean ignoreEof) throws IOException {
-    // read the first 2 bits and determine the encoding type
-    isRepeating = false;
-    int firstByte = input.read();
-    if (firstByte < 0) {
-      if (!ignoreEof) {
-        throw new EOFException("Read past end of RLE integer from " + input);
-      }
-      used = numLiterals = 0;
-      return;
-    }
-    currentEncoding = encodings[(firstByte >>> 6) & 0x03];
-    switch (currentEncoding) {
-    case SHORT_REPEAT: readShortRepeatValues(firstByte); break;
-    case DIRECT: readDirectValues(firstByte); break;
-    case PATCHED_BASE: readPatchedBaseValues(firstByte); break;
-    case DELTA: readDeltaValues(firstByte); break;
-    default: throw new IOException("Unknown encoding " + currentEncoding);
-    }
-  }
-
-  private void readDeltaValues(int firstByte) throws IOException {
-
-    // extract the number of fixed bits
-    int fb = (firstByte >>> 1) & 0x1f;
-    if (fb != 0) {
-      fb = utils.decodeBitWidth(fb);
-    }
-
-    // extract the blob run length
-    int len = (firstByte & 0x01) << 8;
-    len |= input.read();
-
-    // read the first value stored as vint
-    long firstVal = 0;
-    if (signed) {
-      firstVal = utils.readVslong(input);
-    } else {
-      firstVal = utils.readVulong(input);
-    }
-
-    // store first value to result buffer
-    long prevVal = firstVal;
-    literals[numLiterals++] = firstVal;
-
-    // if fixed bits is 0 then all values have fixed delta
-    if (fb == 0) {
-      // read the fixed delta value stored as vint (deltas can be negative even
-      // if all number are positive)
-      long fd = utils.readVslong(input);
-      if (fd == 0) {
-        isRepeating = true;
-        assert numLiterals == 1;
-        Arrays.fill(literals, numLiterals, numLiterals + len, literals[0]);
-        numLiterals += len;
-      } else {
-        // add fixed deltas to adjacent values
-        for(int i = 0; i < len; i++) {
-          literals[numLiterals++] = literals[numLiterals - 2] + fd;
-        }
-      }
-    } else {
-      long deltaBase = utils.readVslong(input);
-      // add delta base and first value
-      literals[numLiterals++] = firstVal + deltaBase;
-      prevVal = literals[numLiterals - 1];
-      len -= 1;
-
-      // write the unpacked values, add it to previous value and store final
-      // value to result buffer. if the delta base value is negative then it
-      // is a decreasing sequence else an increasing sequence
-      utils.readInts(literals, numLiterals, len, fb, input);
-      while (len > 0) {
-        if (deltaBase < 0) {
-          literals[numLiterals] = prevVal - literals[numLiterals];
-        } else {
-          literals[numLiterals] = prevVal + literals[numLiterals];
-        }
-        prevVal = literals[numLiterals];
-        len--;
-        numLiterals++;
-      }
-    }
-  }
-
-  private void readPatchedBaseValues(int firstByte) throws IOException {
-
-    // extract the number of fixed bits
-    int fbo = (firstByte >>> 1) & 0x1f;
-    int fb = utils.decodeBitWidth(fbo);
-
-    // extract the run length of data blob
-    int len = (firstByte & 0x01) << 8;
-    len |= input.read();
-    // runs are always one off
-    len += 1;
-
-    // extract the number of bytes occupied by base
-    int thirdByte = input.read();
-    int bw = (thirdByte >>> 5) & 0x07;
-    // base width is one off
-    bw += 1;
-
-    // extract patch width
-    int pwo = thirdByte & 0x1f;
-    int pw = utils.decodeBitWidth(pwo);
-
-    // read fourth byte and extract patch gap width
-    int fourthByte = input.read();
-    int pgw = (fourthByte >>> 5) & 0x07;
-    // patch gap width is one off
-    pgw += 1;
-
-    // extract the length of the patch list
-    int pl = fourthByte & 0x1f;
-
-    // read the next base width number of bytes to extract base value
-    long base = utils.bytesToLongBE(input, bw);
-    long mask = (1L << ((bw * 8) - 1));
-    // if MSB of base value is 1 then base is negative value else positive
-    if ((base & mask) != 0) {
-      base = base & ~mask;
-      base = -base;
-    }
-
-    // unpack the data blob
-    long[] unpacked = new long[len];
-    utils.readInts(unpacked, 0, len, fb, input);
-
-    // unpack the patch blob
-    long[] unpackedPatch = new long[pl];
-
-    if ((pw + pgw) > 64 && !skipCorrupt) {
-      throw new IOException("Corruption in ORC data encountered. To skip" +
-          " reading corrupted data, set hive.exec.orc.skip.corrupt.data to" +
-          " true");
-    }
-    int bitSize = utils.getClosestFixedBits(pw + pgw);
-    utils.readInts(unpackedPatch, 0, pl, bitSize, input);
-
-    // apply the patch directly when decoding the packed data
-    int patchIdx = 0;
-    long currGap = 0;
-    long currPatch = 0;
-    long patchMask = ((1L << pw) - 1);
-    currGap = unpackedPatch[patchIdx] >>> pw;
-    currPatch = unpackedPatch[patchIdx] & patchMask;
-    long actualGap = 0;
-
-    // special case: gap is >255 then patch value will be 0.
-    // if gap is <=255 then patch value cannot be 0
-    while (currGap == 255 && currPatch == 0) {
-      actualGap += 255;
-      patchIdx++;
-      currGap = unpackedPatch[patchIdx] >>> pw;
-      currPatch = unpackedPatch[patchIdx] & patchMask;
-    }
-    // add the left over gap
-    actualGap += currGap;
-
-    // unpack data blob, patch it (if required), add base to get final result
-    for(int i = 0; i < unpacked.length; i++) {
-      if (i == actualGap) {
-        // extract the patch value
-        long patchedVal = unpacked[i] | (currPatch << fb);
-
-        // add base to patched value
-        literals[numLiterals++] = base + patchedVal;
-
-        // increment the patch to point to next entry in patch list
-        patchIdx++;
-
-        if (patchIdx < pl) {
-          // read the next gap and patch
-          currGap = unpackedPatch[patchIdx] >>> pw;
-          currPatch = unpackedPatch[patchIdx] & patchMask;
-          actualGap = 0;
-
-          // special case: gap is >255 then patch will be 0. if gap is
-          // <=255 then patch cannot be 0
-          while (currGap == 255 && currPatch == 0) {
-            actualGap += 255;
-            patchIdx++;
-            currGap = unpackedPatch[patchIdx] >>> pw;
-            currPatch = unpackedPatch[patchIdx] & patchMask;
-          }
-          // add the left over gap
-          actualGap += currGap;
-
-          // next gap is relative to the current gap
-          actualGap += i;
-        }
-      } else {
-        // no patching required. add base to unpacked value to get final value
-        literals[numLiterals++] = base + unpacked[i];
-      }
-    }
-
-  }
-
-  private void readDirectValues(int firstByte) throws IOException {
-
-    // extract the number of fixed bits
-    int fbo = (firstByte >>> 1) & 0x1f;
-    int fb = utils.decodeBitWidth(fbo);
-
-    // extract the run length
-    int len = (firstByte & 0x01) << 8;
-    len |= input.read();
-    // runs are one off
-    len += 1;
-
-    // write the unpacked values and zigzag decode to result buffer
-    utils.readInts(literals, numLiterals, len, fb, input);
-    if (signed) {
-      for(int i = 0; i < len; i++) {
-        literals[numLiterals] = utils.zigzagDecode(literals[numLiterals]);
-        numLiterals++;
-      }
-    } else {
-      numLiterals += len;
-    }
-  }
-
-  private void readShortRepeatValues(int firstByte) throws IOException {
-
-    // read the number of bytes occupied by the value
-    int size = (firstByte >>> 3) & 0x07;
-    // #bytes are one off
-    size += 1;
-
-    // read the run length
-    int len = firstByte & 0x07;
-    // run lengths values are stored only after MIN_REPEAT value is met
-    len += RunLengthIntegerWriterV2.MIN_REPEAT;
-
-    // read the repeated value which is store using fixed bytes
-    long val = utils.bytesToLongBE(input, size);
-
-    if (signed) {
-      val = utils.zigzagDecode(val);
-    }
-
-    if (numLiterals != 0) {
-      // Currently this always holds, which makes peekNextAvailLength simpler.
-      // If this changes, peekNextAvailLength should be adjusted accordingly.
-      throw new AssertionError("readValues called with existing values present");
-    }
-    // repeat the value for length times
-    isRepeating = true;
-    // TODO: this is not so useful and V1 reader doesn't do that. Fix? Same if delta == 0
-    for(int i = 0; i < len; i++) {
-      literals[i] = val;
-    }
-    numLiterals = len;
-  }
-
-  @Override
-  public boolean hasNext() throws IOException {
-    return used != numLiterals || input.available() > 0;
-  }
-
-  @Override
-  public long next() throws IOException {
-    long result;
-    if (used == numLiterals) {
-      numLiterals = 0;
-      used = 0;
-      readValues(false);
-    }
-    result = literals[used++];
-    return result;
-  }
-
-  @Override
-  public void seek(PositionProvider index) throws IOException {
-    input.seek(index);
-    int consumed = (int) index.getNext();
-    if (consumed != 0) {
-      // a loop is required for cases where we break the run into two
-      // parts
-      while (consumed > 0) {
-        numLiterals = 0;
-        readValues(false);
-        used = consumed;
-        consumed -= numLiterals;
-      }
-    } else {
-      used = 0;
-      numLiterals = 0;
-    }
-  }
-
-  @Override
-  public void skip(long numValues) throws IOException {
-    while (numValues > 0) {
-      if (used == numLiterals) {
-        numLiterals = 0;
-        used = 0;
-        readValues(false);
-      }
-      long consume = Math.min(numValues, numLiterals - used);
-      used += consume;
-      numValues -= consume;
-    }
-  }
-
-  @Override
-  public void nextVector(ColumnVector previous,
-                         long[] data,
-                         int previousLen) throws IOException {
-    previous.isRepeating = true;
-    for (int i = 0; i < previousLen; i++) {
-      if (!previous.isNull[i]) {
-        data[i] = next();
-      } else {
-        // The default value of null for int type in vectorized
-        // processing is 1, so set that if the value is null
-        data[i] = 1;
-      }
-
-      // The default value for nulls in Vectorization for int types is 1
-      // and given that non null value can also be 1, we need to check for isNull also
-      // when determining the isRepeating flag.
-      if (previous.isRepeating
-          && i > 0
-          && (data[0] != data[i] ||
-          previous.isNull[0] != previous.isNull[i])) {
-        previous.isRepeating = false;
-      }
-    }
-  }
-
-  @Override
-  public void nextVector(ColumnVector vector,
-                         int[] data,
-                         int size) throws IOException {
-    if (vector.noNulls) {
-      for(int r=0; r < data.length && r < size; ++r) {
-        data[r] = (int) next();
-      }
-    } else if (!(vector.isRepeating && vector.isNull[0])) {
-      for(int r=0; r < data.length && r < size; ++r) {
-        if (!vector.isNull[r]) {
-          data[r] = (int) next();
-        } else {
-          data[r] = 1;
-        }
-      }
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/hive/blob/df8921d8/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriter.java
----------------------------------------------------------------------
diff --git a/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriter.java b/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriter.java
deleted file mode 100644
index 3e5f2e2..0000000
--- a/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriter.java
+++ /dev/null
@@ -1,143 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.orc.impl;
-
-import java.io.IOException;
-
-/**
- * A streamFactory that writes a sequence of integers. A control byte is written before
- * each run with positive values 0 to 127 meaning 3 to 130 repetitions, each
- * repetition is offset by a delta. If the control byte is -1 to -128, 1 to 128
- * literal vint values follow.
- */
-public class RunLengthIntegerWriter implements IntegerWriter {
-  static final int MIN_REPEAT_SIZE = 3;
-  static final int MAX_DELTA = 127;
-  static final int MIN_DELTA = -128;
-  static final int MAX_LITERAL_SIZE = 128;
-  private static final int MAX_REPEAT_SIZE = 127 + MIN_REPEAT_SIZE;
-  private final PositionedOutputStream output;
-  private final boolean signed;
-  private final long[] literals = new long[MAX_LITERAL_SIZE];
-  private int numLiterals = 0;
-  private long delta = 0;
-  private boolean repeat = false;
-  private int tailRunLength = 0;
-  private SerializationUtils utils;
-
-  public RunLengthIntegerWriter(PositionedOutputStream output,
-                         boolean signed) {
-    this.output = output;
-    this.signed = signed;
-    this.utils = new SerializationUtils();
-  }
-
-  private void writeValues() throws IOException {
-    if (numLiterals != 0) {
-      if (repeat) {
-        output.write(numLiterals - MIN_REPEAT_SIZE);
-        output.write((byte) delta);
-        if (signed) {
-          utils.writeVslong(output, literals[0]);
-        } else {
-          utils.writeVulong(output, literals[0]);
-        }
-      } else {
-        output.write(-numLiterals);
-        for(int i=0; i < numLiterals; ++i) {
-          if (signed) {
-            utils.writeVslong(output, literals[i]);
-          } else {
-            utils.writeVulong(output, literals[i]);
-          }
-        }
-      }
-      repeat = false;
-      numLiterals = 0;
-      tailRunLength = 0;
-    }
-  }
-
-  @Override
-  public void flush() throws IOException {
-    writeValues();
-    output.flush();
-  }
-
-  @Override
-  public void write(long value) throws IOException {
-    if (numLiterals == 0) {
-      literals[numLiterals++] = value;
-      tailRunLength = 1;
-    } else if (repeat) {
-      if (value == literals[0] + delta * numLiterals) {
-        numLiterals += 1;
-        if (numLiterals == MAX_REPEAT_SIZE) {
-          writeValues();
-        }
-      } else {
-        writeValues();
-        literals[numLiterals++] = value;
-        tailRunLength = 1;
-      }
-    } else {
-      if (tailRunLength == 1) {
-        delta = value - literals[numLiterals - 1];
-        if (delta < MIN_DELTA || delta > MAX_DELTA) {
-          tailRunLength = 1;
-        } else {
-          tailRunLength = 2;
-        }
-      } else if (value == literals[numLiterals - 1] + delta) {
-        tailRunLength += 1;
-      } else {
-        delta = value - literals[numLiterals - 1];
-        if (delta < MIN_DELTA || delta > MAX_DELTA) {
-          tailRunLength = 1;
-        } else {
-          tailRunLength = 2;
-        }
-      }
-      if (tailRunLength == MIN_REPEAT_SIZE) {
-        if (numLiterals + 1 == MIN_REPEAT_SIZE) {
-          repeat = true;
-          numLiterals += 1;
-        } else {
-          numLiterals -= MIN_REPEAT_SIZE - 1;
-          long base = literals[numLiterals];
-          writeValues();
-          literals[0] = base;
-          repeat = true;
-          numLiterals = MIN_REPEAT_SIZE;
-        }
-      } else {
-        literals[numLiterals++] = value;
-        if (numLiterals == MAX_LITERAL_SIZE) {
-          writeValues();
-        }
-      }
-    }
-  }
-
-  @Override
-  public void getPosition(PositionRecorder recorder) throws IOException {
-    output.getPosition(recorder);
-    recorder.addPosition(numLiterals);
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/hive/blob/df8921d8/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriterV2.java
----------------------------------------------------------------------
diff --git a/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriterV2.java b/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriterV2.java
deleted file mode 100644
index fab2801..0000000
--- a/orc/src/java/org/apache/orc/impl/RunLengthIntegerWriterV2.java
+++ /dev/null
@@ -1,831 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.orc.impl;
-
-import java.io.IOException;
-
-/**
- * A writer that performs light weight compression over sequence of integers.
- * <p>
- * There are four types of lightweight integer compression
- * <ul>
- * <li>SHORT_REPEAT</li>
- * <li>DIRECT</li>
- * <li>PATCHED_BASE</li>
- * <li>DELTA</li>
- * </ul>
- * </p>
- * The description and format for these types are as below:
- * <p>
- * <b>SHORT_REPEAT:</b> Used for short repeated integer sequences.
- * <ul>
- * <li>1 byte header
- * <ul>
- * <li>2 bits for encoding type</li>
- * <li>3 bits for bytes required for repeating value</li>
- * <li>3 bits for repeat count (MIN_REPEAT + run length)</li>
- * </ul>
- * </li>
- * <li>Blob - repeat value (fixed bytes)</li>
- * </ul>
- * </p>
- * <p>
- * <b>DIRECT:</b> Used for random integer sequences whose number of bit
- * requirement doesn't vary a lot.
- * <ul>
- * <li>2 bytes header
- * <ul>
- * 1st byte
- * <li>2 bits for encoding type</li>
- * <li>5 bits for fixed bit width of values in blob</li>
- * <li>1 bit for storing MSB of run length</li>
- * </ul>
- * <ul>
- * 2nd byte
- * <li>8 bits for lower run length bits</li>
- * </ul>
- * </li>
- * <li>Blob - stores the direct values using fixed bit width. The length of the
- * data blob is (fixed width * run length) bits long</li>
- * </ul>
- * </p>
- * <p>
- * <b>PATCHED_BASE:</b> Used for random integer sequences whose number of bit
- * requirement varies beyond a threshold.
- * <ul>
- * <li>4 bytes header
- * <ul>
- * 1st byte
- * <li>2 bits for encoding type</li>
- * <li>5 bits for fixed bit width of values in blob</li>
- * <li>1 bit for storing MSB of run length</li>
- * </ul>
- * <ul>
- * 2nd byte
- * <li>8 bits for lower run length bits</li>
- * </ul>
- * <ul>
- * 3rd byte
- * <li>3 bits for bytes required to encode base value</li>
- * <li>5 bits for patch width</li>
- * </ul>
- * <ul>
- * 4th byte
- * <li>3 bits for patch gap width</li>
- * <li>5 bits for patch length</li>
- * </ul>
- * </li>
- * <li>Base value - Stored using fixed number of bytes. If MSB is set, base
- * value is negative else positive. Length of base value is (base width * 8)
- * bits.</li>
- * <li>Data blob - Base reduced values as stored using fixed bit width. Length
- * of data blob is (fixed width * run length) bits.</li>
- * <li>Patch blob - Patch blob is a list of gap and patch value. Each entry in
- * the patch list is (patch width + patch gap width) bits long. Gap between the
- * subsequent elements to be patched are stored in upper part of entry whereas
- * patch values are stored in lower part of entry. Length of patch blob is
- * ((patch width + patch gap width) * patch length) bits.</li>
- * </ul>
- * </p>
- * <p>
- * <b>DELTA</b> Used for monotonically increasing or decreasing sequences,
- * sequences with fixed delta values or long repeated sequences.
- * <ul>
- * <li>2 bytes header
- * <ul>
- * 1st byte
- * <li>2 bits for encoding type</li>
- * <li>5 bits for fixed bit width of values in blob</li>
- * <li>1 bit for storing MSB of run length</li>
- * </ul>
- * <ul>
- * 2nd byte
- * <li>8 bits for lower run length bits</li>
- * </ul>
- * </li>
- * <li>Base value - zigzag encoded value written as varint</li>
- * <li>Delta base - zigzag encoded value written as varint</li>
- * <li>Delta blob - only positive values. monotonicity and orderness are decided
- * based on the sign of the base value and delta base</li>
- * </ul>
- * </p>
- */
-public class RunLengthIntegerWriterV2 implements IntegerWriter {
-
-  public enum EncodingType {
-    SHORT_REPEAT, DIRECT, PATCHED_BASE, DELTA
-  }
-
-  static final int MAX_SCOPE = 512;
-  static final int MIN_REPEAT = 3;
-  private static final int MAX_SHORT_REPEAT_LENGTH = 10;
-  private long prevDelta = 0;
-  private int fixedRunLength = 0;
-  private int variableRunLength = 0;
-  private final long[] literals = new long[MAX_SCOPE];
-  private final PositionedOutputStream output;
-  private final boolean signed;
-  private EncodingType encoding;
-  private int numLiterals;
-  private final long[] zigzagLiterals = new long[MAX_SCOPE];
-  private final long[] baseRedLiterals = new long[MAX_SCOPE];
-  private final long[] adjDeltas = new long[MAX_SCOPE];
-  private long fixedDelta;
-  private int zzBits90p;
-  private int zzBits100p;
-  private int brBits95p;
-  private int brBits100p;
-  private int bitsDeltaMax;
-  private int patchWidth;
-  private int patchGapWidth;
-  private int patchLength;
-  private long[] gapVsPatchList;
-  private long min;
-  private boolean isFixedDelta;
-  private SerializationUtils utils;
-  private boolean alignedBitpacking;
-
-  RunLengthIntegerWriterV2(PositionedOutputStream output, boolean signed) {
-    this(output, signed, true);
-  }
-
-  public RunLengthIntegerWriterV2(PositionedOutputStream output, boolean signed,
-      boolean alignedBitpacking) {
-    this.output = output;
-    this.signed = signed;
-    this.alignedBitpacking = alignedBitpacking;
-    this.utils = new SerializationUtils();
-    clear();
-  }
-
-  private void writeValues() throws IOException {
-    if (numLiterals != 0) {
-
-      if (encoding.equals(EncodingType.SHORT_REPEAT)) {
-        writeShortRepeatValues();
-      } else if (encoding.equals(EncodingType.DIRECT)) {
-        writeDirectValues();
-      } else if (encoding.equals(EncodingType.PATCHED_BASE)) {
-        writePatchedBaseValues();
-      } else {
-        writeDeltaValues();
-      }
-
-      // clear all the variables
-      clear();
-    }
-  }
-
-  private void writeDeltaValues() throws IOException {
-    int len = 0;
-    int fb = bitsDeltaMax;
-    int efb = 0;
-
-    if (alignedBitpacking) {
-      fb = utils.getClosestAlignedFixedBits(fb);
-    }
-
-    if (isFixedDelta) {
-      // if fixed run length is greater than threshold then it will be fixed
-      // delta sequence with delta value 0 else fixed delta sequence with
-      // non-zero delta value
-      if (fixedRunLength > MIN_REPEAT) {
-        // ex. sequence: 2 2 2 2 2 2 2 2
-        len = fixedRunLength - 1;
-        fixedRunLength = 0;
-      } else {
-        // ex. sequence: 4 6 8 10 12 14 16
-        len = variableRunLength - 1;
-        variableRunLength = 0;
-      }
-    } else {
-      // fixed width 0 is used for long repeating values.
-      // sequences that require only 1 bit to encode will have an additional bit
-      if (fb == 1) {
-        fb = 2;
-      }
-      efb = utils.encodeBitWidth(fb);
-      efb = efb << 1;
-      len = variableRunLength - 1;
-      variableRunLength = 0;
-    }
-
-    // extract the 9th bit of run length
-    final int tailBits = (len & 0x100) >>> 8;
-
-    // create first byte of the header
-    final int headerFirstByte = getOpcode() | efb | tailBits;
-
-    // second byte of the header stores the remaining 8 bits of runlength
-    final int headerSecondByte = len & 0xff;
-
-    // write header
-    output.write(headerFirstByte);
-    output.write(headerSecondByte);
-
-    // store the first value from zigzag literal array
-    if (signed) {
-      utils.writeVslong(output, literals[0]);
-    } else {
-      utils.writeVulong(output, literals[0]);
-    }
-
-    if (isFixedDelta) {
-      // if delta is fixed then we don't need to store delta blob
-      utils.writeVslong(output, fixedDelta);
-    } else {
-      // store the first value as delta value using zigzag encoding
-      utils.writeVslong(output, adjDeltas[0]);
-
-      // adjacent delta values are bit packed. The length of adjDeltas array is
-      // always one less than the number of literals (delta difference for n
-      // elements is n-1). We have already written one element, write the
-      // remaining numLiterals - 2 elements here
-      utils.writeInts(adjDeltas, 1, numLiterals - 2, fb, output);
-    }
-  }
-
-  private void writePatchedBaseValues() throws IOException {
-
-    // NOTE: Aligned bit packing cannot be applied for PATCHED_BASE encoding
-    // because patch is applied to MSB bits. For example: If fixed bit width of
-    // base value is 7 bits and if patch is 3 bits, the actual value is
-    // constructed by shifting the patch to left by 7 positions.
-    // actual_value = patch << 7 | base_value
-    // So, if we align base_value then actual_value can not be reconstructed.
-
-    // write the number of fixed bits required in next 5 bits
-    final int fb = brBits95p;
-    final int efb = utils.encodeBitWidth(fb) << 1;
-
-    // adjust variable run length, they are one off
-    variableRunLength -= 1;
-
-    // extract the 9th bit of run length
-    final int tailBits = (variableRunLength & 0x100) >>> 8;
-
-    // create first byte of the header
-    final int headerFirstByte = getOpcode() | efb | tailBits;
-
-    // second byte of the header stores the remaining 8 bits of runlength
-    final int headerSecondByte = variableRunLength & 0xff;
-
-    // if the min value is negative toggle the sign
-    final boolean isNegative = min < 0 ? true : false;
-    if (isNegative) {
-      min = -min;
-    }
-
-    // find the number of bytes required for base and shift it by 5 bits
-    // to accommodate patch width. The additional bit is used to store the sign
-    // of the base value.
-    final int baseWidth = utils.findClosestNumBits(min) + 1;
-    final int baseBytes = baseWidth % 8 == 0 ? baseWidth / 8 : (baseWidth / 8) + 1;
-    final int bb = (baseBytes - 1) << 5;
-
-    // if the base value is negative then set MSB to 1
-    if (isNegative) {
-      min |= (1L << ((baseBytes * 8) - 1));
-    }
-
-    // third byte contains 3 bits for number of bytes occupied by base
-    // and 5 bits for patchWidth
-    final int headerThirdByte = bb | utils.encodeBitWidth(patchWidth);
-
-    // fourth byte contains 3 bits for page gap width and 5 bits for
-    // patch length
-    final int headerFourthByte = (patchGapWidth - 1) << 5 | patchLength;
-
-    // write header
-    output.write(headerFirstByte);
-    output.write(headerSecondByte);
-    output.write(headerThirdByte);
-    output.write(headerFourthByte);
-
-    // write the base value using fixed bytes in big endian order
-    for(int i = baseBytes - 1; i >= 0; i--) {
-      byte b = (byte) ((min >>> (i * 8)) & 0xff);
-      output.write(b);
-    }
-
-    // base reduced literals are bit packed
-    int closestFixedBits = utils.getClosestFixedBits(fb);
-
-    utils.writeInts(baseRedLiterals, 0, numLiterals, closestFixedBits,
-        output);
-
-    // write patch list
-    closestFixedBits = utils.getClosestFixedBits(patchGapWidth + patchWidth);
-
-    utils.writeInts(gapVsPatchList, 0, gapVsPatchList.length, closestFixedBits,
-        output);
-
-    // reset run length
-    variableRunLength = 0;
-  }
-
-  /**
-   * Store the opcode in 2 MSB bits
-   * @return opcode
-   */
-  private int getOpcode() {
-    return encoding.ordinal() << 6;
-  }
-
-  private void writeDirectValues() throws IOException {
-
-    // write the number of fixed bits required in next 5 bits
-    int fb = zzBits100p;
-
-    if (alignedBitpacking) {
-      fb = utils.getClosestAlignedFixedBits(fb);
-    }
-
-    final int efb = utils.encodeBitWidth(fb) << 1;
-
-    // adjust variable run length
-    variableRunLength -= 1;
-
-    // extract the 9th bit of run length
-    final int tailBits = (variableRunLength & 0x100) >>> 8;
-
-    // create first byte of the header
-    final int headerFirstByte = getOpcode() | efb | tailBits;
-
-    // second byte of the header stores the remaining 8 bits of runlength
-    final int headerSecondByte = variableRunLength & 0xff;
-
-    // write header
-    output.write(headerFirstByte);
-    output.write(headerSecondByte);
-
-    // bit packing the zigzag encoded literals
-    utils.writeInts(zigzagLiterals, 0, numLiterals, fb, output);
-
-    // reset run length
-    variableRunLength = 0;
-  }
-
-  private void writeShortRepeatValues() throws IOException {
-    // get the value that is repeating, compute the bits and bytes required
-    long repeatVal = 0;
-    if (signed) {
-      repeatVal = utils.zigzagEncode(literals[0]);
-    } else {
-      repeatVal = literals[0];
-    }
-
-    final int numBitsRepeatVal = utils.findClosestNumBits(repeatVal);
-    final int numBytesRepeatVal = numBitsRepeatVal % 8 == 0 ? numBitsRepeatVal >>> 3
-        : (numBitsRepeatVal >>> 3) + 1;
-
-    // write encoding type in top 2 bits
-    int header = getOpcode();
-
-    // write the number of bytes required for the value
-    header |= ((numBytesRepeatVal - 1) << 3);
-
-    // write the run length
-    fixedRunLength -= MIN_REPEAT;
-    header |= fixedRunLength;
-
-    // write the header
-    output.write(header);
-
-    // write the repeating value in big endian byte order
-    for(int i = numBytesRepeatVal - 1; i >= 0; i--) {
-      int b = (int) ((repeatVal >>> (i * 8)) & 0xff);
-      output.write(b);
-    }
-
-    fixedRunLength = 0;
-  }
-
-  private void determineEncoding() {
-
-    // we need to compute zigzag values for DIRECT encoding if we decide to
-    // break early for delta overflows or for shorter runs
-    computeZigZagLiterals();
-
-    zzBits100p = utils.percentileBits(zigzagLiterals, 0, numLiterals, 1.0);
-
-    // not a big win for shorter runs to determine encoding
-    if (numLiterals <= MIN_REPEAT) {
-      encoding = EncodingType.DIRECT;
-      return;
-    }
-
-    // DELTA encoding check
-
-    // for identifying monotonic sequences
-    boolean isIncreasing = true;
-    boolean isDecreasing = true;
-    this.isFixedDelta = true;
-
-    this.min = literals[0];
-    long max = literals[0];
-    final long initialDelta = literals[1] - literals[0];
-    long currDelta = initialDelta;
-    long deltaMax = initialDelta;
-    this.adjDeltas[0] = initialDelta;
-
-    for (int i = 1; i < numLiterals; i++) {
-      final long l1 = literals[i];
-      final long l0 = literals[i - 1];
-      currDelta = l1 - l0;
-      min = Math.min(min, l1);
-      max = Math.max(max, l1);
-
-      isIncreasing &= (l0 <= l1);
-      isDecreasing &= (l0 >= l1);
-
-      isFixedDelta &= (currDelta == initialDelta);
-      if (i > 1) {
-        adjDeltas[i - 1] = Math.abs(currDelta);
-        deltaMax = Math.max(deltaMax, adjDeltas[i - 1]);
-      }
-    }
-
-    // its faster to exit under delta overflow condition without checking for
-    // PATCHED_BASE condition as encoding using DIRECT is faster and has less
-    // overhead than PATCHED_BASE
-    if (!utils.isSafeSubtract(max, min)) {
-      encoding = EncodingType.DIRECT;
-      return;
-    }
-
-    // invariant - subtracting any number from any other in the literals after
-    // this point won't overflow
-
-    // if min is equal to max then the delta is 0, this condition happens for
-    // fixed values run >10 which cannot be encoded with SHORT_REPEAT
-    if (min == max) {
-      assert isFixedDelta : min + "==" + max +
-          ", isFixedDelta cannot be false";
-      assert currDelta == 0 : min + "==" + max + ", currDelta should be zero";
-      fixedDelta = 0;
-      encoding = EncodingType.DELTA;
-      return;
-    }
-
-    if (isFixedDelta) {
-      assert currDelta == initialDelta
-          : "currDelta should be equal to initialDelta for fixed delta encoding";
-      encoding = EncodingType.DELTA;
-      fixedDelta = currDelta;
-      return;
-    }
-
-    // if initialDelta is 0 then we cannot delta encode as we cannot identify
-    // the sign of deltas (increasing or decreasing)
-    if (initialDelta != 0) {
-      // stores the number of bits required for packing delta blob in
-      // delta encoding
-      bitsDeltaMax = utils.findClosestNumBits(deltaMax);
-
-      // monotonic condition
-      if (isIncreasing || isDecreasing) {
-        encoding = EncodingType.DELTA;
-        return;
-      }
-    }
-
-    // PATCHED_BASE encoding check
-
-    // percentile values are computed for the zigzag encoded values. if the
-    // number of bit requirement between 90th and 100th percentile varies
-    // beyond a threshold then we need to patch the values. if the variation
-    // is not significant then we can use direct encoding
-
-    zzBits90p = utils.percentileBits(zigzagLiterals, 0, numLiterals, 0.9);
-    int diffBitsLH = zzBits100p - zzBits90p;
-
-    // if the difference between 90th percentile and 100th percentile fixed
-    // bits is > 1 then we need patch the values
-    if (diffBitsLH > 1) {
-
-      // patching is done only on base reduced values.
-      // remove base from literals
-      for (int i = 0; i < numLiterals; i++) {
-        baseRedLiterals[i] = literals[i] - min;
-      }
-
-      // 95th percentile width is used to determine max allowed value
-      // after which patching will be done
-      brBits95p = utils.percentileBits(baseRedLiterals, 0, numLiterals, 0.95);
-
-      // 100th percentile is used to compute the max patch width
-      brBits100p = utils.percentileBits(baseRedLiterals, 0, numLiterals, 1.0);
-
-      // after base reducing the values, if the difference in bits between
-      // 95th percentile and 100th percentile value is zero then there
-      // is no point in patching the values, in which case we will
-      // fallback to DIRECT encoding.
-      // The decision to use patched base was based on zigzag values, but the
-      // actual patching is done on base reduced literals.
-      if ((brBits100p - brBits95p) != 0) {
-        encoding = EncodingType.PATCHED_BASE;
-        preparePatchedBlob();
-        return;
-      } else {
-        encoding = EncodingType.DIRECT;
-        return;
-      }
-    } else {
-      // if difference in bits between 95th percentile and 100th percentile is
-      // 0, then patch length will become 0. Hence we will fallback to direct
-      encoding = EncodingType.DIRECT;
-      return;
-    }
-  }
-
-  private void computeZigZagLiterals() {
-    // populate zigzag encoded literals
-    long zzEncVal = 0;
-    for (int i = 0; i < numLiterals; i++) {
-      if (signed) {
-        zzEncVal = utils.zigzagEncode(literals[i]);
-      } else {
-        zzEncVal = literals[i];
-      }
-      zigzagLiterals[i] = zzEncVal;
-    }
-  }
-
-  private void preparePatchedBlob() {
-    // mask will be max value beyond which patch will be generated
-    long mask = (1L << brBits95p) - 1;
-
-    // since we are considering only 95 percentile, the size of gap and
-    // patch array can contain only be 5% values
-    patchLength = (int) Math.ceil((numLiterals * 0.05));
-
-    int[] gapList = new int[patchLength];
-    long[] patchList = new long[patchLength];
-
-    // #bit for patch
-    patchWidth = brBits100p - brBits95p;
-    patchWidth = utils.getClosestFixedBits(patchWidth);
-
-    // if patch bit requirement is 64 then it will not possible to pack
-    // gap and patch together in a long. To make sure gap and patch can be
-    // packed together adjust the patch width
-    if (patchWidth == 64) {
-      patchWidth = 56;
-      brBits95p = 8;
-      mask = (1L << brBits95p) - 1;
-    }
-
-    int gapIdx = 0;
-    int patchIdx = 0;
-    int prev = 0;
-    int gap = 0;
-    int maxGap = 0;
-
-    for(int i = 0; i < numLiterals; i++) {
-      // if value is above mask then create the patch and record the gap
-      if (baseRedLiterals[i] > mask) {
-        gap = i - prev;
-        if (gap > maxGap) {
-          maxGap = gap;
-        }
-
-        // gaps are relative, so store the previous patched value index
-        prev = i;
-        gapList[gapIdx++] = gap;
-
-        // extract the most significant bits that are over mask bits
-        long patch = baseRedLiterals[i] >>> brBits95p;
-        patchList[patchIdx++] = patch;
-
-        // strip off the MSB to enable safe bit packing
-        baseRedLiterals[i] &= mask;
-      }
-    }
-
-    // adjust the patch length to number of entries in gap list
-    patchLength = gapIdx;
-
-    // if the element to be patched is the first and only element then
-    // max gap will be 0, but to store the gap as 0 we need atleast 1 bit
-    if (maxGap == 0 && patchLength != 0) {
-      patchGapWidth = 1;
-    } else {
-      patchGapWidth = utils.findClosestNumBits(maxGap);
-    }
-
-    // special case: if the patch gap width is greater than 256, then
-    // we need 9 bits to encode the gap width. But we only have 3 bits in
-    // header to record the gap width. To deal with this case, we will save
-    // two entries in patch list in the following way
-    // 256 gap width => 0 for patch value
-    // actual gap - 256 => actual patch value
-    // We will do the same for gap width = 511. If the element to be patched is
-    // the last element in the scope then gap width will be 511. In this case we
-    // will have 3 entries in the patch list in the following way
-    // 255 gap width => 0 for patch value
-    // 255 gap width => 0 for patch value
-    // 1 gap width => actual patch value
-    if (patchGapWidth > 8) {
-      patchGapWidth = 8;
-      // for gap = 511, we need two additional entries in patch list
-      if (maxGap == 511) {
-        patchLength += 2;
-      } else {
-        patchLength += 1;
-      }
-    }
-
-    // create gap vs patch list
-    gapIdx = 0;
-    patchIdx = 0;
-    gapVsPatchList = new long[patchLength];
-    for(int i = 0; i < patchLength; i++) {
-      long g = gapList[gapIdx++];
-      long p = patchList[patchIdx++];
-      while (g > 255) {
-        gapVsPatchList[i++] = (255L << patchWidth);
-        g -= 255;
-      }
-
-      // store patch value in LSBs and gap in MSBs
-      gapVsPatchList[i] = (g << patchWidth) | p;
-    }
-  }
-
-  /**
-   * clears all the variables
-   */
-  private void clear() {
-    numLiterals = 0;
-    encoding = null;
-    prevDelta = 0;
-    fixedDelta = 0;
-    zzBits90p = 0;
-    zzBits100p = 0;
-    brBits95p = 0;
-    brBits100p = 0;
-    bitsDeltaMax = 0;
-    patchGapWidth = 0;
-    patchLength = 0;
-    patchWidth = 0;
-    gapVsPatchList = null;
-    min = 0;
-    isFixedDelta = true;
-  }
-
-  @Override
-  public void flush() throws IOException {
-    if (numLiterals != 0) {
-      if (variableRunLength != 0) {
-        determineEncoding();
-        writeValues();
-      } else if (fixedRunLength != 0) {
-        if (fixedRunLength < MIN_REPEAT) {
-          variableRunLength = fixedRunLength;
-          fixedRunLength = 0;
-          determineEncoding();
-          writeValues();
-        } else if (fixedRunLength >= MIN_REPEAT
-            && fixedRunLength <= MAX_SHORT_REPEAT_LENGTH) {
-          encoding = EncodingType.SHORT_REPEAT;
-          writeValues();
-        } else {
-          encoding = EncodingType.DELTA;
-          isFixedDelta = true;
-          writeValues();
-        }
-      }
-    }
-    output.flush();
-  }
-
-  @Override
-  public void write(long val) throws IOException {
-    if (numLiterals == 0) {
-      initializeLiterals(val);
-    } else {
-      if (numLiterals == 1) {
-        prevDelta = val - literals[0];
-        literals[numLiterals++] = val;
-        // if both values are same count as fixed run else variable run
-        if (val == literals[0]) {
-          fixedRunLength = 2;
-          variableRunLength = 0;
-        } else {
-          fixedRunLength = 0;
-          variableRunLength = 2;
-        }
-      } else {
-        long currentDelta = val - literals[numLiterals - 1];
-        if (prevDelta == 0 && currentDelta == 0) {
-          // fixed delta run
-
-          literals[numLiterals++] = val;
-
-          // if variable run is non-zero then we are seeing repeating
-          // values at the end of variable run in which case keep
-          // updating variable and fixed runs
-          if (variableRunLength > 0) {
-            fixedRunLength = 2;
-          }
-          fixedRunLength += 1;
-
-          // if fixed run met the minimum condition and if variable
-          // run is non-zero then flush the variable run and shift the
-          // tail fixed runs to start of the buffer
-          if (fixedRunLength >= MIN_REPEAT && variableRunLength > 0) {
-            numLiterals -= MIN_REPEAT;
-            variableRunLength -= MIN_REPEAT - 1;
-            // copy the tail fixed runs
-            long[] tailVals = new long[MIN_REPEAT];
-            System.arraycopy(literals, numLiterals, tailVals, 0, MIN_REPEAT);
-
-            // determine variable encoding and flush values
-            determineEncoding();
-            writeValues();
-
-            // shift tail fixed runs to beginning of the buffer
-            for(long l : tailVals) {
-              literals[numLiterals++] = l;
-            }
-          }
-
-          // if fixed runs reached max repeat length then write values
-          if (fixedRunLength == MAX_SCOPE) {
-            determineEncoding();
-            writeValues();
-          }
-        } else {
-          // variable delta run
-
-          // if fixed run length is non-zero and if it satisfies the
-          // short repeat conditions then write the values as short repeats
-          // else use delta encoding
-          if (fixedRunLength >= MIN_REPEAT) {
-            if (fixedRunLength <= MAX_SHORT_REPEAT_LENGTH) {
-              encoding = EncodingType.SHORT_REPEAT;
-              writeValues();
-            } else {
-              encoding = EncodingType.DELTA;
-              isFixedDelta = true;
-              writeValues();
-            }
-          }
-
-          // if fixed run length is <MIN_REPEAT and current value is
-          // different from previous then treat it as variable run
-          if (fixedRunLength > 0 && fixedRunLength < MIN_REPEAT) {
-            if (val != literals[numLiterals - 1]) {
-              variableRunLength = fixedRunLength;
-              fixedRunLength = 0;
-            }
-          }
-
-          // after writing values re-initialize the variables
-          if (numLiterals == 0) {
-            initializeLiterals(val);
-          } else {
-            // keep updating variable run lengths
-            prevDelta = val - literals[numLiterals - 1];
-            literals[numLiterals++] = val;
-            variableRunLength += 1;
-
-            // if variable run length reach the max scope, write it
-            if (variableRunLength == MAX_SCOPE) {
-              determineEncoding();
-              writeValues();
-            }
-          }
-        }
-      }
-    }
-  }
-
-  private void initializeLiterals(long val) {
-    literals[numLiterals++] = val;
-    fixedRunLength = 1;
-    variableRunLength = 1;
-  }
-
-  @Override
-  public void getPosition(PositionRecorder recorder) throws IOException {
-    output.getPosition(recorder);
-    recorder.addPosition(numLiterals);
-  }
-}

http://git-wip-us.apache.org/repos/asf/hive/blob/df8921d8/orc/src/java/org/apache/orc/impl/SchemaEvolution.java
----------------------------------------------------------------------
diff --git a/orc/src/java/org/apache/orc/impl/SchemaEvolution.java b/orc/src/java/org/apache/orc/impl/SchemaEvolution.java
deleted file mode 100644
index c1bd2b7..0000000
--- a/orc/src/java/org/apache/orc/impl/SchemaEvolution.java
+++ /dev/null
@@ -1,399 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.orc.impl;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-import org.apache.orc.TypeDescription;
-
-/**
- * Take the file types and the (optional) configuration column names/types and see if there
- * has been schema evolution.
- */
-public class SchemaEvolution {
-  // indexed by reader column id
-  private final TypeDescription[] readerFileTypes;
-  // indexed by reader column id
-  private final boolean[] readerIncluded;
-  // the offset to the first column id ignoring any ACID columns
-  private final int readerColumnOffset;
-  // indexed by file column id
-  private final boolean[] fileIncluded;
-  private final TypeDescription fileSchema;
-  private final TypeDescription readerSchema;
-  private boolean hasConversion;
-  // indexed by reader column id
-  private final boolean[] ppdSafeConversion;
-
-  public SchemaEvolution(TypeDescription fileSchema, boolean[] includedCols) {
-    this(fileSchema, null, includedCols);
-  }
-
-  public SchemaEvolution(TypeDescription fileSchema,
-                         TypeDescription readerSchema,
-                         boolean[] includeCols) {
-    this.readerIncluded = includeCols == null ? null : Arrays.copyOf(includeCols, includeCols.length);
-    this.fileIncluded = new boolean[fileSchema.getMaximumId() + 1];
-    this.hasConversion = false;
-    this.fileSchema = fileSchema;
-    boolean isAcid = checkAcidSchema(fileSchema);
-    this.readerColumnOffset = isAcid ? acidEventFieldNames.size() : 0;
-    if (readerSchema != null) {
-      if (isAcid) {
-        this.readerSchema = createEventSchema(readerSchema);
-      } else {
-        this.readerSchema = readerSchema;
-      }
-      if (readerIncluded != null &&
-          readerIncluded.length + readerColumnOffset != this.readerSchema.getMaximumId() + 1) {
-        throw new IllegalArgumentException("Include vector the wrong length: " +
-            this.readerSchema.toJson() + " with include length " +
-            readerIncluded.length);
-      }
-      this.readerFileTypes = new TypeDescription[this.readerSchema.getMaximumId() + 1];
-      buildConversionFileTypesArray(fileSchema, this.readerSchema);
-    } else {
-      this.readerSchema = fileSchema;
-      this.readerFileTypes = new TypeDescription[this.readerSchema.getMaximumId() + 1];
-      if (readerIncluded != null &&
-          readerIncluded.length + readerColumnOffset != this.readerSchema.getMaximumId() + 1) {
-        throw new IllegalArgumentException("Include vector the wrong length: " +
-            this.readerSchema.toJson() + " with include length " +
-            readerIncluded.length);
-      }
-      buildSameSchemaFileTypesArray();
-    }
-    this.ppdSafeConversion = populatePpdSafeConversion();
-  }
-
-  public TypeDescription getReaderSchema() {
-    return readerSchema;
-  }
-
-  /**
-   * Returns the non-ACID (aka base) reader type description.
-   *
-   * @return the reader type ignoring the ACID rowid columns, if any
-   */
-  public TypeDescription getReaderBaseSchema() {
-    return readerSchema.findSubtype(readerColumnOffset);
-  }
-
-  /**
-   * Is there Schema Evolution data type conversion?
-   * @return
-   */
-  public boolean hasConversion() {
-    return hasConversion;
-  }
-
-  public TypeDescription getFileType(TypeDescription readerType) {
-    return getFileType(readerType.getId());
-  }
-
-  /**
-   * Get whether each column is included from the reader's point of view.
-   * @return a boolean array indexed by reader column id
-   */
-  public boolean[] getReaderIncluded() {
-    return readerIncluded;
-  }
-
-  /**
-   * Get whether each column is included from the file's point of view.
-   * @return a boolean array indexed by file column id
-   */
-  public boolean[] getFileIncluded() {
-    return fileIncluded;
-  }
-
-  /**
-   * Get the file type by reader type id.
-   * @param id reader column id
-   * @return
-   */
-  public TypeDescription getFileType(int id) {
-    return readerFileTypes[id];
-  }
-
-  /**
-   * Check if column is safe for ppd evaluation
-   * @param colId reader column id
-   * @return true if the specified column is safe for ppd evaluation else false
-   */
-  public boolean isPPDSafeConversion(final int colId) {
-    if (hasConversion()) {
-      if (colId < 0 || colId >= ppdSafeConversion.length) {
-        return false;
-      }
-      return ppdSafeConversion[colId];
-    }
-
-    // when there is no schema evolution PPD is safe
-    return true;
-  }
-
-  private boolean[] populatePpdSafeConversion() {
-    if (fileSchema == null || readerSchema == null || readerFileTypes == null) {
-      return null;
-    }
-
-    boolean[] result = new boolean[readerSchema.getMaximumId() + 1];
-    boolean safePpd = validatePPDConversion(fileSchema, readerSchema);
-    result[readerSchema.getId()] = safePpd;
-    List<TypeDescription> children = readerSchema.getChildren();
-    if (children != null) {
-      for (TypeDescription child : children) {
-        TypeDescription fileType = getFileType(child.getId());
-        safePpd = validatePPDConversion(fileType, child);
-        result[child.getId()] = safePpd;
-      }
-    }
-    return result;
-  }
-
-  private boolean validatePPDConversion(final TypeDescription fileType,
-      final TypeDescription readerType) {
-    if (fileType == null) {
-      return false;
-    }
-    if (fileType.getCategory().isPrimitive()) {
-      if (fileType.getCategory().equals(readerType.getCategory())) {
-        // for decimals alone do equality check to not mess up with precision change
-        if (fileType.getCategory().equals(TypeDescription.Category.DECIMAL) &&
-            !fileType.equals(readerType)) {
-          return false;
-        }
-        return true;
-      }
-
-      // only integer and string evolutions are safe
-      // byte -> short -> int -> long
-      // string <-> char <-> varchar
-      // NOTE: Float to double evolution is not safe as floats are stored as doubles in ORC's
-      // internal index, but when doing predicate evaluation for queries like "select * from
-      // orc_float where f = 74.72" the constant on the filter is converted from string -> double
-      // so the precisions will be different and the comparison will fail.
-      // Soon, we should convert all sargs that compare equality between floats or
-      // doubles to range predicates.
-
-      // Similarly string -> char and varchar -> char and vice versa is not possible, as ORC stores
-      // char with padded spaces in its internal index.
-      switch (fileType.getCategory()) {
-        case BYTE:
-          if (readerType.getCategory().equals(TypeDescription.Category.SHORT) ||
-              readerType.getCategory().equals(TypeDescription.Category.INT) ||
-              readerType.getCategory().equals(TypeDescription.Category.LONG)) {
-            return true;
-          }
-          break;
-        case SHORT:
-          if (readerType.getCategory().equals(TypeDescription.Category.INT) ||
-              readerType.getCategory().equals(TypeDescription.Category.LONG)) {
-            return true;
-          }
-          break;
-        case INT:
-          if (readerType.getCategory().equals(TypeDescription.Category.LONG)) {
-            return true;
-          }
-          break;
-        case STRING:
-          if (readerType.getCategory().equals(TypeDescription.Category.VARCHAR)) {
-            return true;
-          }
-          break;
-        case VARCHAR:
-          if (readerType.getCategory().equals(TypeDescription.Category.STRING)) {
-            return true;
-          }
-          break;
-        default:
-          break;
-      }
-    }
-    return false;
-  }
-
-  /**
-   * Should we read the given reader column?
-   * @param readerId the id of column in the extended reader schema
-   * @return true if the column should be read
-   */
-  public boolean includeReaderColumn(int readerId) {
-    return readerIncluded == null ||
-        readerId <= readerColumnOffset ||
-        readerIncluded[readerId - readerColumnOffset];
-  }
-
-  void buildConversionFileTypesArray(TypeDescription fileType,
-                                     TypeDescription readerType) {
-    // if the column isn't included, don't map it
-    int readerId = readerType.getId();
-    if (!includeReaderColumn(readerId)) {
-      return;
-    }
-    boolean isOk = true;
-    // check the easy case first
-    if (fileType.getCategory() == readerType.getCategory()) {
-      switch (readerType.getCategory()) {
-        case BOOLEAN:
-        case BYTE:
-        case SHORT:
-        case INT:
-        case LONG:
-        case DOUBLE:
-        case FLOAT:
-        case STRING:
-        case TIMESTAMP:
-        case BINARY:
-        case DATE:
-          // these are always a match
-          break;
-        case CHAR:
-        case VARCHAR:
-          // We do conversion when same CHAR/VARCHAR type but different maxLength.
-          if (fileType.getMaxLength() != readerType.getMaxLength()) {
-            hasConversion = true;
-          }
-          break;
-        case DECIMAL:
-          // We do conversion when same DECIMAL type but different precision/scale.
-          if (fileType.getPrecision() != readerType.getPrecision() ||
-              fileType.getScale() != readerType.getScale()) {
-            hasConversion = true;
-          }
-          break;
-        case UNION:
-        case MAP:
-        case LIST: {
-          // these must be an exact match
-          List<TypeDescription> fileChildren = fileType.getChildren();
-          List<TypeDescription> readerChildren = readerType.getChildren();
-          if (fileChildren.size() == readerChildren.size()) {
-            for(int i=0; i < fileChildren.size(); ++i) {
-              buildConversionFileTypesArray(fileChildren.get(i), readerChildren.get(i));
-            }
-          } else {
-            isOk = false;
-          }
-          break;
-        }
-        case STRUCT: {
-          // allow either side to have fewer fields than the other
-          List<TypeDescription> fileChildren = fileType.getChildren();
-          List<TypeDescription> readerChildren = readerType.getChildren();
-          if (fileChildren.size() != readerChildren.size()) {
-            hasConversion = true;
-          }
-          int jointSize = Math.min(fileChildren.size(), readerChildren.size());
-          for(int i=0; i < jointSize; ++i) {
-            buildConversionFileTypesArray(fileChildren.get(i), readerChildren.get(i));
-          }
-          break;
-        }
-        default:
-          throw new IllegalArgumentException("Unknown type " + readerType);
-      }
-    } else {
-      /*
-       * Check for the few cases where will not convert....
-       */
-
-      isOk = ConvertTreeReaderFactory.canConvert(fileType, readerType);
-      hasConversion = true;
-    }
-    if (isOk) {
-      if (readerFileTypes[readerId] != null) {
-        throw new RuntimeException("reader to file type entry already assigned");
-      }
-      readerFileTypes[readerId] = fileType;
-      fileIncluded[fileType.getId()] = true;
-    } else {
-      throw new IllegalArgumentException(
-          String.format(
-              "ORC does not support type conversion from file type %s (%d) to reader type %s (%d)",
-              fileType.toString(), fileType.getId(),
-              readerType.toString(), readerId));
-    }
-  }
-
-  /**
-   * Use to make a reader to file type array when the schema is the same.
-   * @return
-   */
-  private void buildSameSchemaFileTypesArray() {
-    buildSameSchemaFileTypesArrayRecurse(readerSchema);
-  }
-
-  void buildSameSchemaFileTypesArrayRecurse(TypeDescription readerType) {
-    int id = readerType.getId();
-    if (!includeReaderColumn(id)) {
-      return;
-    }
-    if (readerFileTypes[id] != null) {
-      throw new RuntimeException("reader to file type entry already assigned");
-    }
-    readerFileTypes[id] = readerType;
-    fileIncluded[id] = true;
-    List<TypeDescription> children = readerType.getChildren();
-    if (children != null) {
-      for (TypeDescription child : children) {
-        buildSameSchemaFileTypesArrayRecurse(child);
-      }
-    }
-  }
-
-  private static boolean checkAcidSchema(TypeDescription type) {
-    if (type.getCategory().equals(TypeDescription.Category.STRUCT)) {
-      List<String> rootFields = type.getFieldNames();
-      if (acidEventFieldNames.equals(rootFields)) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  /**
-   * @param typeDescr
-   * @return ORC types for the ACID event based on the row's type description
-   */
-  public static TypeDescription createEventSchema(TypeDescription typeDescr) {
-    TypeDescription result = TypeDescription.createStruct()
-        .addField("operation", TypeDescription.createInt())
-        .addField("originalTransaction", TypeDescription.createLong())
-        .addField("bucket", TypeDescription.createInt())
-        .addField("rowId", TypeDescription.createLong())
-        .addField("currentTransaction", TypeDescription.createLong())
-        .addField("row", typeDescr.clone());
-    return result;
-  }
-
-  public static final List<String> acidEventFieldNames= new ArrayList<String>();
-  static {
-    acidEventFieldNames.add("operation");
-    acidEventFieldNames.add("originalTransaction");
-    acidEventFieldNames.add("bucket");
-    acidEventFieldNames.add("rowId");
-    acidEventFieldNames.add("currentTransaction");
-    acidEventFieldNames.add("row");
-  }
-}


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