Add JSON decoder option to allow comments.

Author: blackwinter

metafacture-json/src/main/java/org/metafacture/json/JsonDecoder.java

@@ -56,6 +56,14 @@ public JsonDecoder() {
         resetRecordCount();
     }
 
+    public void setAllowComments(final boolean allowComments) {
+        jsonFactory.configure(JsonParser.Feature.ALLOW_COMMENTS, allowComments);
+    }
+
+    public boolean getAllowComments() {
+        return jsonFactory.isEnabled(JsonParser.Feature.ALLOW_COMMENTS);
+    }
+
     public void setArrayMarker(final String arrayMarker) {
         this.arrayMarker = arrayMarker;
     }

metafacture-json/src/test/java/org/metafacture/json/JsonDecoderTest.java

@@ -19,6 +19,7 @@
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verifyZeroInteractions;
 
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -196,4 +197,47 @@ public void testShouldNotParseTrailingGarbage() {
         jsonDecoder.process("{\"lit\":\"value\"}XXX");
     }
 
+    @Test
+    public void testShouldNotParseComments() {
+        exception.expect(MetafactureException.class);
+        exception.expectMessage("Unexpected character ('/' (code 47))");
+
+        Assert.assertFalse(jsonDecoder.getAllowComments());
+
+        jsonDecoder.process("//{\"lit\":\"value\"}");
+    }
+
+    @Test
+    public void testShouldParseCommentsIfEnabled() {
+        jsonDecoder.setAllowComments(true);
+        Assert.assertTrue(jsonDecoder.getAllowComments());
+
+        jsonDecoder.process("//{\"lit\":\"value\"}");
+
+        verifyZeroInteractions(receiver);
+    }
+
+    @Test
+    public void testShouldNotParseInlineComments() {
+        exception.expect(MetafactureException.class);
+        exception.expectMessage("Unexpected character ('/' (code 47))");
+
+        Assert.assertFalse(jsonDecoder.getAllowComments());
+
+        jsonDecoder.process("{\"lit\":/*comment*/\"value\"}");
+    }
+
+    @Test
+    public void testShouldParseInlineCommentsIfEnabled() {
+        jsonDecoder.setAllowComments(true);
+        Assert.assertTrue(jsonDecoder.getAllowComments());
+
+        jsonDecoder.process("{\"lit\":/*comment*/\"value\"}");
+
+        final InOrder ordered = inOrder(receiver);
+        ordered.verify(receiver).startRecord("1");
+        ordered.verify(receiver).literal("lit", "value");
+        ordered.verify(receiver).endRecord();
+    }
+
 }