Minor fixes to issue related to #700 (current name access via getText() should work)

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/core/filter/FilteringParserDelegate.java

@@ -865,11 +865,44 @@ public JsonParser skipChildren() throws IOException
     /**********************************************************
      */
 
-    @Override public String getText() throws IOException { return delegate.getText();  }
-    @Override public boolean hasTextCharacters() { return delegate.hasTextCharacters(); }
-    @Override public char[] getTextCharacters() throws IOException { return delegate.getTextCharacters(); }
-    @Override public int getTextLength() throws IOException { return delegate.getTextLength(); }
-    @Override public int getTextOffset() throws IOException { return delegate.getTextOffset(); }
+    // 19-Jul-2021, tatu: Cannot quite just delegate these methods due to oddity
+    //   of property name token, which may be buffered.
+
+    @Override public String getText() throws IOException {
+        if (_currToken == JsonToken.FIELD_NAME) {
+            return currentName();
+        }
+        return delegate.getText();
+    }
+
+    @Override public boolean hasTextCharacters() {
+        if (_currToken == JsonToken.FIELD_NAME) {
+            return false;
+        }
+        return delegate.hasTextCharacters();
+    }
+
+    @Override public char[] getTextCharacters() throws IOException {
+        // Not optimal but is correct, unlike delegating (as underlying stream
+        // may point to something else due to buffering)
+        if (_currToken == JsonToken.FIELD_NAME) {
+            return currentName().toCharArray();
+        }
+        return delegate.getTextCharacters();
+    }
+
+    @Override public int getTextLength() throws IOException {
+        if (_currToken == JsonToken.FIELD_NAME) {
+            return currentName().length();
+        }
+        return delegate.getTextLength();
+    }
+    @Override public int getTextOffset() throws IOException {
+        if (_currToken == JsonToken.FIELD_NAME) {
+            return 0;
+        }
+        return delegate.getTextOffset();
+    }
 
     /*
     /**********************************************************
@@ -924,9 +957,20 @@ public JsonParser skipChildren() throws IOException
     @Override public double getValueAsDouble(double defaultValue) throws IOException { return delegate.getValueAsDouble(defaultValue); }
     @Override public boolean getValueAsBoolean() throws IOException { return delegate.getValueAsBoolean(); }
     @Override public boolean getValueAsBoolean(boolean defaultValue) throws IOException { return delegate.getValueAsBoolean(defaultValue); }
-    @Override public String getValueAsString() throws IOException { return delegate.getValueAsString(); }
-    @Override public String getValueAsString(String defaultValue) throws IOException { return delegate.getValueAsString(defaultValue); }
-    
+
+    @Override public String getValueAsString() throws IOException {
+        if (_currToken == JsonToken.FIELD_NAME) {
+            return currentName();
+        }
+        return delegate.getValueAsString();
+    }
+    @Override public String getValueAsString(String defaultValue) throws IOException {
+        if (_currToken == JsonToken.FIELD_NAME) {
+            return currentName();
+        }
+        return delegate.getValueAsString(defaultValue);
+    }
+
     /*
     /**********************************************************
     /* Public API, access to token values, other

src/test/java/com/fasterxml/jackson/core/filter/ParserFiltering700Test.java

@@ -45,6 +45,10 @@ public void testSkippingRootLevel() throws Exception
 
         assertToken(JsonToken.FIELD_NAME, p.nextToken());
         assertEquals("value", p.currentName());
+        // 19-Jul-2021, tatu: while not ideal, existing contract is that "getText()"
+        //    ought to return property name as well...
+        assertEquals("value", p.getText());
+
         assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
         assertEquals(12, p.getIntValue());
 
@@ -70,10 +74,13 @@ public void testSkippingOneNested() throws Exception
 
         assertToken(JsonToken.FIELD_NAME, p.nextToken());
         assertEquals("value", p.currentName());
+        // as earlier, this needs to hold true too
+        assertEquals("value", p.getText());
 
         assertToken(JsonToken.START_OBJECT, p.nextToken());
         assertToken(JsonToken.FIELD_NAME, p.nextToken());
         assertEquals("a", p.currentName());
+        assertEquals("a", p.getText());
         assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
         assertEquals(12, p.getIntValue());
         assertEquals(JsonToken.END_OBJECT, p.nextToken());
@@ -104,21 +111,29 @@ private void _testSkippingForSingleWithPath(boolean useNextName) throws Exceptio
         );
 
         assertToken(JsonToken.START_OBJECT, p.nextToken());
+        assertTrue(p.isExpectedStartObjectToken());
 
         if (useNextName) {
             assertEquals("value", p.nextFieldName());
+            // as earlier, this needs to hold true too
+            assertEquals("value", p.getText());
             assertToken(JsonToken.START_OBJECT, p.nextToken());
+            assertTrue(p.isExpectedStartObjectToken());
             assertEquals("a", p.nextFieldName());
+            assertEquals("a", p.getText());
             assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
             assertEquals(99, p.getIntValue());
             assertNull(p.nextFieldName());
             assertEquals(JsonToken.END_OBJECT, p.currentToken());
         } else {
             assertToken(JsonToken.FIELD_NAME, p.nextToken());
             assertEquals("value", p.currentName());
+            assertEquals("value", p.getText());
             assertToken(JsonToken.START_OBJECT, p.nextToken());
+            assertTrue(p.isExpectedStartObjectToken());
             assertToken(JsonToken.FIELD_NAME, p.nextToken());
             assertEquals("a", p.currentName());
+            assertEquals("a", p.getText());
             assertToken(JsonToken.VALUE_NUMBER_INT, p.nextToken());
             assertEquals(99, p.getIntValue());
             assertEquals(JsonToken.END_OBJECT, p.nextToken());