Fixed #549

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

@@ -202,8 +202,8 @@ public static int collectDefaults() {
      *<p>
      * TODO: should clean up this; looks messy having 2 alternatives
      * with not very clear differences.
-     * 
-     * @since 2.6.0
+     *
+     * @since 2.6
      */
     protected final transient ByteQuadsCanonicalizer _byteSymbolCanonicalizer = ByteQuadsCanonicalizer.createRoot();
 

src/main/java/com/fasterxml/jackson/core/io/CharTypes.java

@@ -161,9 +161,7 @@ public final class CharTypes
             // 04-Mar-2011, tatu: Used to use "-(i + 1)", replaced with constant
             table[i] = CharacterEscapes.ESCAPE_STANDARD;
         }
-        /* Others (and some within that range too) have explicit shorter
-         * sequences
-         */
+        // Others (and some within that range too) have explicit shorter sequences
         table['"'] = '"';
         table['\\'] = '\\';
         // Escaping of slash is optional, so let's not add it
@@ -210,6 +208,19 @@ public final class CharTypes
      */
     public static int[] get7BitOutputEscapes() { return sOutputEscapes128; }
 
+    /**
+     * Alternative to {@link #get7BitOutputEscapes()} when a non-standard quote character
+     * is used.
+     *
+     * @since 2.10
+     */
+    public static int[] get7BitOutputEscapes(int quoteChar) {
+        if (quoteChar == '"') {
+            return sOutputEscapes128;
+        }
+        return AltEscapes.instance.escapesFor(quoteChar);
+    }
+
     public static int charToHex(int ch)
     {
         return (ch > 127) ? -1 : sHexValues[ch];
@@ -255,5 +266,25 @@ public static char[] copyHexChars() {
     public static byte[] copyHexBytes() {
         return (byte[]) HB.clone();
     }
+
+    // @since 2.10
+    private static class AltEscapes {
+        public final static AltEscapes instance = new AltEscapes();
+
+        private int[][] _altEscapes = new int[128][];
+
+        public int[] escapesFor(int quoteChar) {
+            int[] esc = _altEscapes[quoteChar];
+            if (esc == null) {
+                esc = Arrays.copyOf(sOutputEscapes128, 128);
+                // Only add escape setting if character does not already have it
+                if (esc[quoteChar] == 0) {
+                    esc[quoteChar] = CharacterEscapes.ESCAPE_STANDARD;
+                }
+                _altEscapes[quoteChar] = esc;
+            }
+            return esc;
+        }
+    }
 }
 

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

@@ -122,7 +122,10 @@ public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
     {
         super(ctxt, features, codec);
         _outputStream = out;
-        _quoteChar = (byte) quoteChar; // TODO: validate/truncate 
+        _quoteChar = (byte) quoteChar;
+        if (quoteChar != '"') { // since 2.10
+            _outputEscapes = CharTypes.get7BitOutputEscapes(quoteChar);
+        }
 
         _bufferRecyclable = true;
         _outputBuffer = ctxt.allocWriteEncodingBuffer();
@@ -152,7 +155,10 @@ public UTF8JsonGenerator(IOContext ctxt, int features, ObjectCodec codec,
 
         super(ctxt, features, codec);
         _outputStream = out;
-        _quoteChar = (byte) quoteChar; // TODO: validate/truncate 
+        _quoteChar = (byte) quoteChar;
+        if (quoteChar != '"') { // since 2.10
+            _outputEscapes = CharTypes.get7BitOutputEscapes(quoteChar);
+        }
 
         _bufferRecyclable = bufferRecyclable;
         _outputTail = outputOffset;

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

@@ -109,6 +109,9 @@ public WriterBasedJsonGenerator(IOContext ctxt, int features,
         _outputBuffer = ctxt.allocConcatBuffer();
         _outputEnd = _outputBuffer.length;
         _quoteChar = quoteChar;
+        if (quoteChar != '"') { // since 2.10
+            _outputEscapes = CharTypes.get7BitOutputEscapes(quoteChar);
+        }
     }
 
     /*

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

@@ -75,14 +75,14 @@ public void testAposQuotingWithCharBased() throws Exception
         _writeObject(g, "key", "It's \"fun\"");
         g.close();
         // should escape apostrophes but not quotes?
-        assertEquals("{'key':'It\\'s' \"fun\"}", w.toString());
+        assertEquals("{'key':'It\\u0027s \\\"fun\\\"'}", w.toString());
 
         // with Array
         w = new StringWriter();
         g = createGenerator(JSON_F, w);
         _writeArray(g, "It's a sin");
         g.close();
-        assertEquals("['It\\'s a sin']", w.toString());
+        assertEquals("['It\\u0027s a sin']", w.toString());
     }
 
     public void testAposQuotingWithByteBased() throws Exception
@@ -96,14 +96,14 @@ public void testAposQuotingWithByteBased() throws Exception
         _writeObject(g, "key", "It's \"fun\"");
         g.close();
         // should escape apostrophes but not quotes?
-        assertEquals("{'key':'It\\'s' \"fun\"}", out.toString("UTF-8"));
+        assertEquals("{'key':'It\\u0027s \\\"fun\\\"'}", out.toString("UTF-8"));
 
         // with Array
         out = new ByteArrayOutputStream();
         g = createGenerator(JSON_F, out);
         _writeArray(g, "It's a sin");
         g.close();
-        assertEquals("['It\\'s a sin']", out.toString("UTF-8"));
+        assertEquals("['It\\u0027s a sin']", out.toString("UTF-8"));
     }
 
     private void _writeObject(JsonGenerator g, String key, String value) throws Exception {

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

@@ -1,10 +1,6 @@
 package com.fasterxml.jackson.core.json;
 
-import com.fasterxml.jackson.core.BaseTest;
-import com.fasterxml.jackson.core.JsonFactory;
-import com.fasterxml.jackson.core.JsonGenerator;
-import com.fasterxml.jackson.core.JsonParser;
-import com.fasterxml.jackson.core.JsonToken;
+import com.fasterxml.jackson.core.*;
 import com.fasterxml.jackson.core.filter.FilteringGeneratorDelegate;
 import com.fasterxml.jackson.core.filter.JsonPointerBasedFilter;
 import com.fasterxml.jackson.core.io.IOContext;