Work on #611, manually merge data-input version first

Author: cowtowncoder

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

@@ -170,7 +170,13 @@ public enum Feature {
          */
          @Deprecated
         ALLOW_NUMERIC_LEADING_ZEROS(false),
-        
+
+        /**
+         * @deprecated Use {@link com.fasterxml.jackson.core.json.JsonReadFeature#ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS} instead
+         */
+        @Deprecated
+        ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS(false),
+
         /**
          * Feature that allows parser to recognize set of
          * "Not-a-Number" (NaN) tokens as legal floating number

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

@@ -118,7 +118,8 @@ public enum JsonReadFeature
      *
      * @since 2.11
      */
-    ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS(false, null),
+    @SuppressWarnings("deprecation")
+    ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS(false, JsonParser.Feature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS),
 
     /**
      * Feature that allows parser to recognize set of

src/main/java/com/fasterxml/jackson/core/json/UTF8DataInputJsonParser.java

@@ -670,6 +670,7 @@ public JsonToken nextToken() throws IOException
         case '7':
         case '8':
         case '9':
+        case '.': // as per [core#611]
             t = _parsePosNumber(i);
             break;
         case 'f':
@@ -735,6 +736,7 @@ private final JsonToken _nextTokenNotInObject(int i) throws IOException
         case '7':
         case '8':
         case '9':
+        case '.': // as per [core#611]
             return (_currToken = _parsePosNumber(i));
         }
         return (_currToken = _handleUnexpectedValue(i));
@@ -840,6 +842,7 @@ public String nextFieldName() throws IOException
         case '7':
         case '8':
         case '9':
+        case '.': // as per [core#611]
             t = _parsePosNumber(i);
             break;
         case 'f':
@@ -996,7 +999,8 @@ protected JsonToken _parsePosNumber(int c) throws IOException
     {
         char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
         int outPtr;
-
+        final boolean forceFloat;
+        
         // One special case: if first char is 0, must not be followed by a digit.
         // Gets bit tricky as we only want to retain 0 if it's the full value
         if (c == INT_0) {
@@ -1007,7 +1011,16 @@ protected JsonToken _parsePosNumber(int c) throws IOException
                 outBuf[0] = '0';
                 outPtr = 1;
             }
+            forceFloat = false;
         } else {
+            forceFloat = (c == INT_PERIOD);
+            if (forceFloat) {
+                // [core#611]: allow optionally leading decimal point
+                if (!isEnabled(JsonReadFeature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS.mappedFeature())) {
+                    return _handleUnexpectedValue(c);
+                }
+            }
+            
             outBuf[0] = (char) c;
             c = _inputData.readUnsignedByte();
             outPtr = 1;
@@ -1024,7 +1037,7 @@ protected JsonToken _parsePosNumber(int c) throws IOException
             outBuf[outPtr++] = (char) c;
             c = _inputData.readUnsignedByte();
         }
-        if (c == '.' || c == 'e' || c == 'E') {
+        if (c == '.' || c == 'e' || c == 'E' || forceFloat) {
             return _parseFloat(outBuf, outPtr, c, false, intLen);
         }
         _textBuffer.setCurrentLength(outPtr);

src/test/java/com/fasterxml/jackson/failing/NonStandardNumbers611Test.java

@@ -22,31 +22,30 @@ public void testLeadingDotInDecimal() throws Exception {
         }
     }
 
-    public void testLeadingDotInDecimalAllowed() throws Exception {
-        final JsonFactory f = JsonFactory.builder()
-                .enable(JsonReadFeature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS)
-                .build();
-
-// TODO:
-/*
-        for (int mode : ALL_MODES) {
-            _testLeadingDotInDecimalAllowed(f, mode);
-        }
-        */
+    private final JsonFactory JSON_F = JsonFactory.builder()
+            .enable(JsonReadFeature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS)
+            .build();
+    
+    public void testLeadingDotInDecimalAllowedAsync() throws Exception {
+        _testLeadingDotInDecimalAllowed(JSON_F, MODE_DATA_INPUT);
+    }
 
+    public void testLeadingDotInDecimalAllowedBytes() throws Exception {
+        _testLeadingDotInDecimalAllowed(JSON_F, MODE_INPUT_STREAM);
+        _testLeadingDotInDecimalAllowed(JSON_F, MODE_INPUT_STREAM_THROTTLED);
+    }
 
-        _testLeadingDotInDecimalAllowed(f, MODE_INPUT_STREAM);
-        _testLeadingDotInDecimalAllowed(f, MODE_INPUT_STREAM_THROTTLED);
-        _testLeadingDotInDecimalAllowed(f, MODE_READER);
-        _testLeadingDotInDecimalAllowed(f, MODE_DATA_INPUT);
+    public void testLeadingDotInDecimalAllowedReader() throws Exception {
+        _testLeadingDotInDecimalAllowed(JSON_F, MODE_READER);
     }
 
     private void _testLeadingDotInDecimalAllowed(JsonFactory f, int mode) throws Exception
     {
-        JsonParser p = createParser(f, mode, " .123 ");
+        JsonParser p = createParser(f, mode, " .125 ");
         assertEquals(JsonToken.VALUE_NUMBER_FLOAT, p.nextToken());
-        assertEquals(0.123, p.getValueAsDouble());
-        assertEquals("0.123", p.getDecimalValue().toString());
+        assertEquals(0.125, p.getValueAsDouble());
+        assertEquals("0.125", p.getDecimalValue().toString());
+        assertEquals(".125", p.getText());
         p.close();
     }
 }