First sort-of working version of #549

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/core/JsonFactory.java

@@ -1567,7 +1567,7 @@ protected JsonParser _createParser(DataInput input, IOContext ctxt) throws IOExc
     protected JsonGenerator _createGenerator(Writer out, IOContext ctxt) throws IOException
     {
         WriterBasedJsonGenerator gen = new WriterBasedJsonGenerator(ctxt,
-                _generatorFeatures, _objectCodec, out);
+                _generatorFeatures, _objectCodec, out, _quoteChar);
         if (_maximumNonEscapedChar > 0) {
             gen.setHighestNonEscapedChar(_maximumNonEscapedChar);
         }
@@ -1593,7 +1593,7 @@ protected JsonGenerator _createGenerator(Writer out, IOContext ctxt) throws IOEx
      */
     protected JsonGenerator _createUTF8Generator(OutputStream out, IOContext ctxt) throws IOException {
         UTF8JsonGenerator gen = new UTF8JsonGenerator(ctxt,
-                _generatorFeatures, _objectCodec, out);
+                _generatorFeatures, _objectCodec, out, _quoteChar);
         if (_maximumNonEscapedChar > 0) {
             gen.setHighestNonEscapedChar(_maximumNonEscapedChar);
         }

src/main/java/com/fasterxml/jackson/core/json/UTF8JsonGenerator.java

@@ -113,12 +113,17 @@ public class UTF8JsonGenerator
     /**********************************************************
      */
 
+    /**
+     * @since 2.10
+     */
     @SuppressWarnings("deprecation")
     public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
-            OutputStream out)
+            OutputStream out, char quoteChar)
     {
         super(ctxt, features, codec);
         _outputStream = out;
+        _quoteChar = (byte) quoteChar; // TODO: validate/truncate 
+
         _bufferRecyclable = true;
         _outputBuffer = ctxt.allocWriteEncodingBuffer();
         _outputEnd = _outputBuffer.length;
@@ -137,13 +142,18 @@ public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
         }
     }
 
+    /**
+     * @since 2.10
+     */
     public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
-            OutputStream out,
+            OutputStream out, char quoteChar,
             byte[] outputBuffer, int outputOffset, boolean bufferRecyclable)
     {
 
         super(ctxt, features, codec);
         _outputStream = out;
+        _quoteChar = (byte) quoteChar; // TODO: validate/truncate 
+
         _bufferRecyclable = bufferRecyclable;
         _outputTail = outputOffset;
         _outputBuffer = outputBuffer;
@@ -154,12 +164,27 @@ public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
         _charBufferLength = _charBuffer.length;
     }
 
+    @Deprecated // since 2.10
+    public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
+            OutputStream out) {
+        this(ctxt, features, codec, out, JsonFactory.DEFAULT_QUOTE_CHAR);
+    }
+
+    @Deprecated // since 2.10
+    public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
+            OutputStream out,
+            byte[] outputBuffer, int outputOffset, boolean bufferRecyclable)
+    {
+        this(ctxt, features, codec, out, JsonFactory.DEFAULT_QUOTE_CHAR,
+                outputBuffer, outputOffset, bufferRecyclable);
+    }
+
     /*
     /**********************************************************
     /* Overridden configuration methods
     /**********************************************************
      */
-    
+
     @Override
     public Object getOutputTarget() {
         return _outputStream;

src/main/java/com/fasterxml/jackson/core/json/WriterBasedJsonGenerator.java

@@ -92,13 +92,25 @@ public class WriterBasedJsonGenerator
     /**********************************************************
      */
 
+    @Deprecated // since 2.10
     public WriterBasedJsonGenerator(IOContext ctxt, int features,
-            ObjectCodec codec, Writer w)
+            ObjectCodec codec, Writer w) {
+        this(ctxt, features, codec, w, JsonFactory.DEFAULT_QUOTE_CHAR);
+    }
+
+    /**
+     * @since 2.10
+     */
+    public WriterBasedJsonGenerator(IOContext ctxt, int features,
+            ObjectCodec codec, Writer w,
+            char quoteChar)
+    
     {
         super(ctxt, features, codec);
         _writer = w;
         _outputBuffer = ctxt.allocConcatBuffer();
         _outputEnd = _outputBuffer.length;
+        _quoteChar = quoteChar;
     }
 
     /*

src/test/java/com/fasterxml/jackson/core/BaseTest.java

@@ -302,7 +302,7 @@ protected void verifyIntValue(JsonParser p, long expValue)
 
     /*
     /**********************************************************
-    /* Parser/generator construction
+    /* Parser construction
     /**********************************************************
      */
 
@@ -396,12 +396,34 @@ protected JsonParser createParserForDataInput(JsonFactory f,
         return f.createParser(input);
     }
 
+    /*
+    /**********************************************************
+    /* Generator construction
+    /**********************************************************
+     */
+
+    protected JsonGenerator createGenerator(OutputStream out) throws IOException {
+        return createGenerator(JSON_FACTORY, out);
+    }
+
+    protected JsonGenerator createGenerator(TokenStreamFactory f, OutputStream out) throws IOException {
+        return f.createGenerator(out);
+    }
+
+    protected JsonGenerator createGenerator(Writer w) throws IOException {
+        return createGenerator(JSON_FACTORY, w);
+    }
+
+    protected JsonGenerator createGenerator(TokenStreamFactory f, Writer w) throws IOException {
+        return f.createGenerator(w);
+    }
+
     /*
     /**********************************************************
     /* Helper read/write methods
     /**********************************************************
      */
-    
+
     protected void writeJsonDoc(JsonFactory f, String doc, Writer w) throws IOException
     {
         writeJsonDoc(f, doc, f.createGenerator(w));

src/test/java/com/fasterxml/jackson/core/TestVersions.java

@@ -17,7 +17,7 @@ public void testCoreVersions() throws Exception
                 CharsToNameCanonicalizer.createRoot());
         assertVersion(jp.version());
         jp.close();
-        JsonGenerator jgen = new WriterBasedJsonGenerator(getIOContext(), 0, null, null);
+        JsonGenerator jgen = new WriterBasedJsonGenerator(getIOContext(), 0, null, null, '"');
         assertVersion(jgen.version());
         jgen.close();
     }

src/test/java/com/fasterxml/jackson/core/json/CustomQuoteCharTest.java

@@ -0,0 +1,62 @@
+package com.fasterxml.jackson.core.json;
+
+import java.io.*;
+
+import com.fasterxml.jackson.core.*;
+
+// For [core#549], ability to use alternate quote characters
+public class CustomQuoteCharTest
+    extends com.fasterxml.jackson.core.BaseTest
+{
+    final JsonFactory JSON_F = streamFactoryBuilder()
+            .quoteChar('\'')
+            .build();
+
+    public void testBasicAposWithCharBased() throws Exception
+    {
+        StringWriter w;
+        JsonGenerator g;
+
+        // with Object
+        w = new StringWriter();
+        g = createGenerator(JSON_F, w);
+        g.writeStartObject();
+        g.writeStringField("question", "answer");
+        g.writeEndObject();
+        g.close();
+        assertEquals("{'question':'answer'}", w.toString());
+
+        // with Array
+        w = new StringWriter();
+        g = createGenerator(JSON_F, w);
+        g.writeStartArray();
+        g.writeString("hello world");
+        g.writeEndArray();
+        g.close();
+        assertEquals("['hello world']", w.toString());
+    }
+
+    public void testBasicAposWithByteBased() throws Exception
+    {
+        ByteArrayOutputStream out;
+        JsonGenerator g;
+
+        // with Object
+        out = new ByteArrayOutputStream();
+        g = createGenerator(JSON_F, out);
+        g.writeStartObject();
+        g.writeStringField("question", "answer");
+        g.writeEndObject();
+        g.close();
+        assertEquals("{'question':'answer'}", out.toString("UTF-8"));
+
+        // with Array
+        out = new ByteArrayOutputStream();
+        g = createGenerator(JSON_F, out);
+        g.writeStartArray();
+        g.writeString("hello world");
+        g.writeEndArray();
+        g.close();
+        assertEquals("['hello world']", out.toString("UTF-8"));
+    }
+}

src/test/java/com/fasterxml/jackson/core/json/TestUtf8Generator.java

@@ -20,7 +20,7 @@ public void testUtf8Issue462() throws Exception
     {
         ByteArrayOutputStream bytes = new ByteArrayOutputStream();
         IOContext ioc = new IOContext(new BufferRecycler(), bytes, true);
-        JsonGenerator gen = new UTF8JsonGenerator(ioc, 0, null, bytes);
+        JsonGenerator gen = new UTF8JsonGenerator(ioc, 0, null, bytes, '"');
         String str = "Natuurlijk is alles gelukt en weer een tevreden klant\uD83D\uDE04";
         int length = 4000 - 38;