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From kwri...@apache.org
Subject svn commit: r1603986 - /manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/
Date Thu, 19 Jun 2014 18:13:58 GMT
Author: kwright
Date: Thu Jun 19 18:13:58 2014
New Revision: 1603986

URL: http://svn.apache.org/r1603986
Log:
Add ManifoldCF special streaming JSON generator

Added:
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONArrayReader.java
  (with props)
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONDoubleReader.java
  (with props)
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONIntegerReader.java
  (with props)
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONNameValueReader.java
  (with props)
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONObjectReader.java
  (with props)
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONReader.java
  (with props)
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONStringReader.java
  (with props)
    manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONValueReader.java
  (with props)

Added: manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONArrayReader.java
URL: http://svn.apache.org/viewvc/manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONArrayReader.java?rev=1603986&view=auto
==============================================================================
--- manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONArrayReader.java
(added)
+++ manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONArrayReader.java
Thu Jun 19 18:13:58 2014
@@ -0,0 +1,89 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+import java.util.*;
+
+/** This class describes a JSON array reader. */
+public class JSONArrayReader extends JSONReader
+{
+  protected final static int STATE_PREBRACKET = 0;
+  protected final static int STATE_ELEMENT = 1;
+  protected final static int STATE_PREEND = 2;
+  protected final static int STATE_DONE = 3;
+  
+  protected int state = STATE_PREBRACKET;
+  protected final List<JSONReader> elements = new ArrayList<JSONReader>();
+  protected int elementIndex;
+  
+  public JSONArrayReader()
+  {
+  }
+  
+  public JSONArrayReader addArrayElement(JSONReader element)
+  {
+    elements.add(element);
+    return this;
+  }
+
+  @Override
+  public int read()
+    throws IOException
+  {
+    int newState;
+    switch (state)
+    {
+    case STATE_PREBRACKET:
+      if (elements.size() == 0)
+        state = STATE_PREEND;
+      else
+      {
+        state = STATE_ELEMENT;
+        elementIndex = 0;
+      }
+      return '[';
+    case STATE_PREEND:
+      state = STATE_DONE;
+      return ']';
+    case STATE_DONE:
+      return -1;
+    case STATE_ELEMENT:
+      int x = elements.get(elementIndex).read();
+      if (x == -1)
+      {
+        elementIndex++;
+        if (elementIndex == elements.size())
+        {
+          state = STATE_DONE;
+          return ']';
+        }
+        else
+          return ',';
+      }
+      else
+        return x;
+    default:
+      throw new IllegalStateException("Unknown state: "+state);
+    }
+  }
+
+}
+
+

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Added: manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONDoubleReader.java
URL: http://svn.apache.org/viewvc/manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONDoubleReader.java?rev=1603986&view=auto
==============================================================================
--- manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONDoubleReader.java
(added)
+++ manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONDoubleReader.java
Thu Jun 19 18:13:58 2014
@@ -0,0 +1,33 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+
+/** This class describes a JSON double reader. */
+public class JSONDoubleReader extends JSONValueReader
+{
+  public JSONDoubleReader(double value)
+  {
+    super(new StringReader(new Double(value).toString()));
+  }
+  
+}
+
+

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Added: manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONIntegerReader.java
URL: http://svn.apache.org/viewvc/manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONIntegerReader.java?rev=1603986&view=auto
==============================================================================
--- manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONIntegerReader.java
(added)
+++ manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONIntegerReader.java
Thu Jun 19 18:13:58 2014
@@ -0,0 +1,33 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+
+/** This class describes a JSON integer reader. */
+public class JSONIntegerReader extends JSONValueReader
+{
+  public JSONIntegerReader(int value)
+  {
+    super(new StringReader(Integer.toString(value)));
+  }
+  
+}
+
+

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Added: manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONNameValueReader.java
URL: http://svn.apache.org/viewvc/manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONNameValueReader.java?rev=1603986&view=auto
==============================================================================
--- manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONNameValueReader.java
(added)
+++ manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONNameValueReader.java
Thu Jun 19 18:13:58 2014
@@ -0,0 +1,73 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+
+/** This class describes a JSON name/value object reader. */
+public class JSONNameValueReader extends JSONObjectReader
+{
+  protected final static int STATE_NAME = 0;
+  protected final static int STATE_VALUE = 1;
+  protected final static int STATE_DONE = 2;
+  
+  protected final JSONReader name;
+  protected final JSONReader value;
+  
+  protected int state = STATE_NAME;
+  
+  public JSONNameValueReader(JSONStringReader name, JSONObjectReader value)
+  {
+    this.name = name;
+    this.value = value;
+  }
+
+  @Override
+  public int read()
+    throws IOException
+  {
+    int x;
+    switch (state)
+    {
+    case STATE_NAME:
+      x = name.read();
+      if (x == -1)
+      {
+        state = STATE_VALUE;
+        return ':';
+      }
+      return x;
+    case STATE_VALUE:
+      x = value.read();
+      if (x == -1)
+      {
+        state = STATE_DONE;
+        return -1;
+      }
+      return x;
+    case STATE_DONE:
+      return -1;
+    default:
+      throw new IllegalStateException("Unknown state: "+state);
+    }
+  }
+
+}
+
+

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Added: manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONObjectReader.java
URL: http://svn.apache.org/viewvc/manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONObjectReader.java?rev=1603986&view=auto
==============================================================================
--- manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONObjectReader.java
(added)
+++ manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONObjectReader.java
Thu Jun 19 18:13:58 2014
@@ -0,0 +1,88 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+import java.util.*;
+
+/** This class describes a JSON object reader. */
+public class JSONObjectReader extends JSONReader
+{
+  protected final static int STATE_PREBRACE = 0;
+  protected final static int STATE_PAIRBEGIN = 1;
+  protected final static int STATE_PREEND = 2;
+  protected final static int STATE_DONE = 3;
+  
+  protected int state = STATE_PREBRACE;
+  protected final List<JSONReader> pairs = new ArrayList<JSONReader>();
+  protected int readerIndex;
+
+  public JSONObjectReader()
+  {
+  }
+  
+  public JSONObjectReader addNameValuePair(JSONNameValueReader pair)
+  {
+    pairs.add(pair);
+    return this;
+  }
+  
+  @Override
+  public int read()
+    throws IOException
+  {
+    switch (state)
+    {
+    case STATE_PREBRACE:
+      if (pairs.size() == 0)
+        state = STATE_PREEND;
+      else
+      {
+        state = STATE_PAIRBEGIN;
+        readerIndex = 0;
+      }
+      return '{';
+    case STATE_PREEND:
+      state = STATE_DONE;
+      return '}';
+    case STATE_DONE:
+      return -1;
+    case STATE_PAIRBEGIN:
+      int x = pairs.get(readerIndex).read();
+      if (x == -1)
+      {
+        readerIndex++;
+        if (readerIndex == pairs.size())
+        {
+          state = STATE_DONE;
+          return '}';
+        }
+        else
+          return ',';
+      }
+      else
+        return x;
+    default:
+      throw new IllegalStateException("Unknown state: "+state);
+    }
+  }
+
+}
+
+

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URL: http://svn.apache.org/viewvc/manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONReader.java?rev=1603986&view=auto
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--- manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONReader.java
(added)
+++ manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONReader.java
Thu Jun 19 18:13:58 2014
@@ -0,0 +1,60 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+
+/** This base class describes a JSON reader. */
+public abstract class JSONReader extends Reader
+{
+
+  @Override
+  public int read(char[] cbuf, int off, int len)
+    throws IOException
+  {
+    int amt = 0;
+    while (true)
+    {
+      if (len == 0)
+        return amt;
+      int theChar = read();
+      if (theChar == -1)
+      {
+        if (amt == 0)
+          return -1;
+        return amt;
+      }
+      cbuf[off++] = (char)theChar;
+      len--;
+    }
+  }
+  
+  @Override
+  public abstract int read()
+    throws IOException;
+  
+  @Override
+  public void close()
+    throws IOException
+  {
+  }
+  
+}
+
+

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URL: http://svn.apache.org/viewvc/manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONStringReader.java?rev=1603986&view=auto
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--- manifoldcf/branches/CONNECTORS-954/framework/core/src/main/java/org/apache/manifoldcf/core/jsongen/JSONStringReader.java
(added)
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Thu Jun 19 18:13:58 2014
@@ -0,0 +1,123 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+
+/** This class describes a JSON string reader. */
+public class JSONStringReader extends JSONReader
+{
+  // Strings need to be escaped, therefore we have our own.
+  /*
+   All Unicode characters may be placed within the
+   quotation marks except for the characters that must be escaped:
+   quotation mark, reverse solidus, and the control characters (U+0000
+   through U+001F).
+
+   Any character may be escaped.  If the character is in the Basic
+   Multilingual Plane (U+0000 through U+FFFF), then it may be
+   represented as a six-character sequence: a reverse solidus, followed
+   by the lowercase letter u, followed by four hexadecimal digits that
+   encode the character's code point.  The hexadecimal letters A though
+   F can be upper or lowercase.  So, for example, a string containing
+   only a single reverse solidus character may be represented as
+   "\u005C".
+
+   Alternatively, there are two-character sequence escape
+   representations of some popular characters.  So, for example, a
+   string containing only a single reverse solidus character may be
+   represented more compactly as "\\".
+  */
+  
+  protected final static int STATE_PREQUOTE = 0;
+  protected final static int STATE_U = 1;
+  protected final static int STATE_1ST = 2;
+  protected final static int STATE_2ND = 3;
+  protected final static int STATE_3RD = 4;
+  protected final static int STATE_4TH = 5;
+  protected final static int STATE_NEXTCHAR = 6;
+  protected final static int STATE_DONE = 7;
+
+  protected final Reader inputReader;
+  
+  protected int state = STATE_PREQUOTE;
+  protected String escapedChar;
+
+  public JSONStringReader(String value)
+  {
+    inputReader = new StringReader(value);
+  }
+  
+  public JSONStringReader(Reader value)
+  {
+    inputReader = value;
+  }
+
+  @Override
+  public int read()
+    throws IOException
+  {
+    int x;
+    switch (state)
+    {
+    case STATE_PREQUOTE:
+      state = STATE_NEXTCHAR;
+      return '"';
+    case STATE_NEXTCHAR:
+      x = inputReader.read();
+      if (x == -1)
+      {
+        state = STATE_DONE;
+        return '"';
+      }
+      else
+      {
+        if (x < ' ' || x == '"' || x == '\\')
+        {
+          escapedChar = "000" + Integer.toHexString(x);
+          escapedChar = escapedChar.substring(escapedChar.length()-4);
+          state = STATE_U;
+          return '\\';
+        }
+        return x;
+      }
+    case STATE_U:
+      state = STATE_1ST;
+      return 'u';
+    case STATE_1ST:
+      state = STATE_2ND;
+      return escapedChar.charAt(0);
+    case STATE_2ND:
+      state = STATE_3RD;
+      return escapedChar.charAt(1);
+    case STATE_3RD:
+      state = STATE_4TH;
+      return escapedChar.charAt(2);
+    case STATE_4TH:
+      state = STATE_NEXTCHAR;
+      return escapedChar.charAt(3);
+    case STATE_DONE:
+      return -1;
+    default:
+      throw new IllegalStateException("Unknown state: "+state);
+    }
+  }
+}
+
+

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Thu Jun 19 18:13:58 2014
@@ -0,0 +1,42 @@
+/* $Id$ */
+
+/**
+* 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.manifoldcf.core.jsongen;
+
+import java.io.*;
+
+/** This class describes a JSON value reader, which can be any terminal value (e.g. string,
integer, float). */
+public class JSONValueReader extends JSONReader
+{
+  /** Wrapped reader */
+  protected final Reader value;
+  
+  protected JSONValueReader(Reader value)
+  {
+    this.value = value;
+  }
+
+  @Override
+  public int read()
+    throws IOException
+  {
+    return value.read();
+  }
+}
+
+

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