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From khorg...@apache.org
Subject svn commit: r1245820 - in /incubator/hcatalog/trunk: CHANGES.txt src/java/org/apache/hcatalog/data/LazyHCatRecord.java src/test/org/apache/hcatalog/data/TestLazyHCatRecord.java
Date Sat, 18 Feb 2012 00:32:05 GMT
Author: khorgath
Date: Sat Feb 18 00:32:04 2012
New Revision: 1245820

URL: http://svn.apache.org/viewvc?rev=1245820&view=rev
Log:
HCATALOG-259 Make readFields() and write() in LazyHCatRecord work

Added:
    incubator/hcatalog/trunk/src/test/org/apache/hcatalog/data/TestLazyHCatRecord.java
Modified:
    incubator/hcatalog/trunk/CHANGES.txt
    incubator/hcatalog/trunk/src/java/org/apache/hcatalog/data/LazyHCatRecord.java

Modified: incubator/hcatalog/trunk/CHANGES.txt
URL: http://svn.apache.org/viewvc/incubator/hcatalog/trunk/CHANGES.txt?rev=1245820&r1=1245819&r2=1245820&view=diff
==============================================================================
--- incubator/hcatalog/trunk/CHANGES.txt (original)
+++ incubator/hcatalog/trunk/CHANGES.txt Sat Feb 18 00:32:04 2012
@@ -33,6 +33,7 @@ Trunk (unreleased changes)
   HCAT-2 Support nested schema conversion between Hive an Pig (julienledem via hashutosh)
 
   IMPROVEMENTS
+  HCAT-259 Make readFields() and write() in LazyHCatRecord work (gates via khorgath)
 
   HCAT-194. Better error messages for HCatalog access control errors (julienledem via hashutosh)
 
   

Modified: incubator/hcatalog/trunk/src/java/org/apache/hcatalog/data/LazyHCatRecord.java
URL: http://svn.apache.org/viewvc/incubator/hcatalog/trunk/src/java/org/apache/hcatalog/data/LazyHCatRecord.java?rev=1245820&r1=1245819&r2=1245820&view=diff
==============================================================================
--- incubator/hcatalog/trunk/src/java/org/apache/hcatalog/data/LazyHCatRecord.java (original)
+++ incubator/hcatalog/trunk/src/java/org/apache/hcatalog/data/LazyHCatRecord.java Sat Feb
18 00:32:04 2012
@@ -17,6 +17,10 @@ import org.apache.hcatalog.common.HCatEx
 import org.apache.hcatalog.common.HCatUtil;
 import org.apache.hcatalog.data.schema.HCatSchema;
 
+/**
+ * An implementation of HCatRecord that wraps an Object returned by a SerDe
+ * and an ObjectInspector.  This delays deserialization of unused columns.
+ */
 public class LazyHCatRecord extends HCatRecord {
 
   public static final Log LOG = LogFactory
@@ -24,7 +28,6 @@ public class LazyHCatRecord extends HCat
 
   private Object o;
   private StructObjectInspector soi;
-  private int size;
   
   @Override
   public Object get(int fieldNum) {
@@ -42,8 +45,8 @@ public class LazyHCatRecord extends HCat
   @Override
   public List<Object> getAll() {
     
-    List<Object> r = new ArrayList<Object>(this.size);
-    for (int i = 0; i < this.size; i++){
+    List<Object> r = new ArrayList<Object>(this.size());
+    for (int i = 0; i < this.size(); i++){
       r.add(i, get(i));
     }
     return r;
@@ -56,7 +59,7 @@ public class LazyHCatRecord extends HCat
 
   @Override
   public int size() {
-    return this.size;
+    return soi.getAllStructFieldRefs().size();
   }
 
   @Override
@@ -106,17 +109,28 @@ public class LazyHCatRecord extends HCat
 
     this.soi = (StructObjectInspector)oi;
     this.o = o;
-    this.size = soi.getAllStructFieldRefs().size();
 
   }
 
   @Override
   public String toString(){
     StringBuilder sb = new StringBuilder();
-    for(int i = 0; i< size ; i++) {
+    for(int i = 0; i< size() ; i++) {
       sb.append(get(i)+"\t");
     }
     return sb.toString();
   }
 
+  /**
+   * Convert this LazyHCatRecord to a DefaultHCatRecord.  This is required
+   * before you can write out a record via write.
+   * @return an HCatRecord that can be serialized
+   * @throws HCatException
+   */
+  public HCatRecord getWritable() throws HCatException {
+    DefaultHCatRecord d = new DefaultHCatRecord();
+    d.copy(this);
+    return d;
+  }
+
 }

Added: incubator/hcatalog/trunk/src/test/org/apache/hcatalog/data/TestLazyHCatRecord.java
URL: http://svn.apache.org/viewvc/incubator/hcatalog/trunk/src/test/org/apache/hcatalog/data/TestLazyHCatRecord.java?rev=1245820&view=auto
==============================================================================
--- incubator/hcatalog/trunk/src/test/org/apache/hcatalog/data/TestLazyHCatRecord.java (added)
+++ incubator/hcatalog/trunk/src/test/org/apache/hcatalog/data/TestLazyHCatRecord.java Sat
Feb 18 00:32:04 2012
@@ -0,0 +1,206 @@
+/*
+ * 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.hcatalog.data;
+
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import org.apache.hcatalog.common.HCatUtil;
+import org.apache.hcatalog.data.DefaultHCatRecord;
+import org.apache.hcatalog.data.HCatRecord;
+import org.apache.hcatalog.data.HCatRecordObjectInspectorFactory;
+import org.apache.hcatalog.data.schema.HCatSchema;
+import org.apache.hcatalog.data.schema.HCatSchemaUtils;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+public class TestLazyHCatRecord extends TestCase{
+
+  private final int INT_CONST = 789;
+  private final long LONG_CONST = 5000000000L;
+  private final double DOUBLE_CONST = 3.141592654;
+  private final String STRING_CONST = "hello world";
+
+
+  public void testGet() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    assertEquals(INT_CONST, ((Integer)r.get(0)).intValue());
+    assertEquals(LONG_CONST, ((Long)r.get(1)).longValue());
+    assertEquals(DOUBLE_CONST, ((Double)r.get(2)).doubleValue());
+    assertEquals(STRING_CONST, (String)r.get(3));
+  }
+
+  // TODO This test fails, but it seems to be an error in the schema, not in
+  // LazyHCatRecord.  It get's an NPE inside getPosition.
+  /*
+  public void testGetWithName() throws Exception {
+    TypeInfo ti = getTypeInfo();
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector(ti));
+    HCatSchema schema = HCatSchemaUtils.getHCatSchema(ti);
+    assertEquals(INT_CONST, ((Integer)r.get("an_int", schema)).intValue());
+    assertEquals(LONG_CONST, ((Long)r.get("a_long", schema)).longValue());
+    assertEquals(DOUBLE_CONST, ((Double)r.get("a_double", schema)).doubleValue());
+    assertEquals(STRING_CONST, (String)r.get("a_string", schema));
+  }
+  */
+
+  public void testGetAll() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    List<Object> list = r.getAll();
+    assertEquals(INT_CONST, ((Integer)list.get(0)).intValue());
+    assertEquals(LONG_CONST, ((Long)list.get(1)).longValue());
+    assertEquals(DOUBLE_CONST, ((Double)list.get(2)).doubleValue());
+    assertEquals(STRING_CONST, (String)list.get(3));
+  }
+
+  public void testSet() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    boolean sawException = false;
+    try {
+      r.set(3, "Mary had a little lamb");
+    } catch (UnsupportedOperationException uoe) {
+      sawException = true;
+    }
+    assertTrue(sawException);
+  }
+
+  public void testSize() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    assertEquals(4, r.size());
+  }
+
+  public void testReadFields() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    boolean sawException = false;
+    try {
+      r.readFields(null);
+    } catch (UnsupportedOperationException uoe) {
+      sawException = true;
+    }
+    assertTrue(sawException);
+  }
+
+  public void testWrite() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    boolean sawException = false;
+    try {
+      r.write(null);
+    } catch (UnsupportedOperationException uoe) {
+      sawException = true;
+    }
+    assertTrue(sawException);
+  }
+
+  public void testSetWithName() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    boolean sawException = false;
+    try {
+      r.set("fred", null, "bob");
+    } catch (UnsupportedOperationException uoe) {
+      sawException = true;
+    }
+    assertTrue(sawException);
+  }
+
+  public void testRemove() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    boolean sawException = false;
+    try {
+      r.remove(0);
+    } catch (UnsupportedOperationException uoe) {
+      sawException = true;
+    }
+    assertTrue(sawException);
+  }
+
+  public void testCopy() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector());
+    boolean sawException = false;
+    try {
+      r.copy(null);
+    } catch (UnsupportedOperationException uoe) {
+      sawException = true;
+    }
+    assertTrue(sawException);
+  }
+
+  private HCatRecord getHCatRecord() throws Exception {
+
+    List<Object> rec_1 = new ArrayList<Object>(4);
+    rec_1.add( new Integer(INT_CONST));
+    rec_1.add( new Long(LONG_CONST));
+    rec_1.add( new Double(DOUBLE_CONST));
+    rec_1.add( new String(STRING_CONST));
+
+    return new DefaultHCatRecord(rec_1);
+  }
+
+  private TypeInfo getTypeInfo() throws Exception {
+    List<String> names = new ArrayList<String>(4);
+    names.add("an_int");
+    names.add("a_long");
+    names.add("a_double");
+    names.add("a_string");
+
+    List<TypeInfo> tis = new ArrayList<TypeInfo>(4);
+    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("int"));
+    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("bigint"));
+    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("double"));
+    tis.add(TypeInfoFactory.getPrimitiveTypeInfo("string"));
+
+    return TypeInfoFactory.getStructTypeInfo(names, tis);
+
+  }
+
+  public void testGetWritable() throws Exception {
+    HCatRecord r = new LazyHCatRecord(getHCatRecord(), getObjectInspector()).getWritable();
+    assertEquals(INT_CONST, ((Integer)r.get(0)).intValue());
+    assertEquals(LONG_CONST, ((Long)r.get(1)).longValue());
+    assertEquals(DOUBLE_CONST, ((Double)r.get(2)).doubleValue());
+    assertEquals(STRING_CONST, (String)r.get(3));
+    assertEquals("org.apache.hcatalog.data.DefaultHCatRecord", r.getClass().getName());
+  }
+
+
+  private ObjectInspector getObjectInspector(TypeInfo ti) throws Exception {
+    return HCatRecordObjectInspectorFactory.getHCatRecordObjectInspector((StructTypeInfo)ti);
+  }
+
+  private ObjectInspector getObjectInspector() throws Exception {
+    return
+      HCatRecordObjectInspectorFactory.getHCatRecordObjectInspector((StructTypeInfo)getTypeInfo());
+  }
+}



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