Update to GSON 2.3.1

src/com/massivecraft/massivecore/xlib/gson/Gson.java

@@ -16,6 +16,21 @@
 
 package com.massivecraft.massivecore.xlib.gson;
 
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.io.Writer;
+import java.lang.reflect.Type;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
 import com.massivecraft.massivecore.xlib.gson.internal.ConstructorConstructor;
 import com.massivecraft.massivecore.xlib.gson.internal.Excluder;
 import com.massivecraft.massivecore.xlib.gson.internal.Primitives;
@@ -38,21 +53,6 @@ import com.massivecraft.massivecore.xlib.gson.stream.JsonToken;
 import com.massivecraft.massivecore.xlib.gson.stream.JsonWriter;
 import com.massivecraft.massivecore.xlib.gson.stream.MalformedJsonException;
 
-import java.io.EOFException;
-import java.io.IOException;
-import java.io.Reader;
-import java.io.StringReader;
-import java.io.StringWriter;
-import java.io.Writer;
-import java.lang.reflect.Type;
-import java.math.BigDecimal;
-import java.math.BigInteger;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
 /**
  * This is the main class for using Gson. Gson is typically used by first constructing a
  * Gson instance and then invoking {@link #toJson(Object)} or {@link #fromJson(String, Class)}
@@ -233,13 +233,13 @@ public final class Gson {
     factories.add(SqlDateTypeAdapter.FACTORY);
     factories.add(TypeAdapters.TIMESTAMP_FACTORY);
     factories.add(ArrayTypeAdapter.FACTORY);
-    factories.add(TypeAdapters.ENUM_FACTORY);
     factories.add(TypeAdapters.CLASS_FACTORY);
 
     // type adapters for composite and user-defined types
     factories.add(new CollectionTypeAdapterFactory(constructorConstructor));
     factories.add(new MapTypeAdapterFactory(constructorConstructor, complexMapKeySerialization));
     factories.add(new JsonAdapterAnnotationTypeAdapterFactory(constructorConstructor));
+    factories.add(TypeAdapters.ENUM_FACTORY);
     factories.add(new ReflectiveTypeAdapterFactory(
         constructorConstructor, fieldNamingPolicy, excluder));
 
@@ -421,6 +421,10 @@ public final class Gson {
    */
   public <T> TypeAdapter<T> getDelegateAdapter(TypeAdapterFactory skipPast, TypeToken<T> type) {
     boolean skipPastFound = false;
+    // Skip past if and only if the specified factory is present in the factories.
+    // This is useful because the factories created through JsonAdapter annotations are not
+    // registered in this list.
+    if (!factories.contains(skipPast)) skipPastFound = true;
 
     for (TypeAdapterFactory factory : factories) {
       if (!skipPastFound) {

src/com/massivecraft/massivecore/xlib/gson/internal/bind/JsonAdapterAnnotationTypeAdapterFactory.java

@@ -37,7 +37,7 @@ public final class JsonAdapterAnnotationTypeAdapterFactory implements TypeAdapte
     this.constructorConstructor = constructorConstructor;
   }
 
-  @SuppressWarnings({"unchecked"})
+  @SuppressWarnings("unchecked")
   public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> targetType) {
     JsonAdapter annotation = targetType.getRawType().getAnnotation(JsonAdapter.class);
     if (annotation == null) {

src/com/massivecraft/massivecore/xlib/gson/internal/bind/ReflectiveTypeAdapterFactory.java

@@ -57,10 +57,18 @@ public final class ReflectiveTypeAdapterFactory implements TypeAdapterFactory {
   }
 
   public boolean excludeField(Field f, boolean serialize) {
+    return excludeField(f, serialize, excluder);
+  }
+
+  static boolean excludeField(Field f, boolean serialize, Excluder excluder) {
     return !excluder.excludeClass(f.getType(), serialize) && !excluder.excludeField(f, serialize);
   }
 
   private String getFieldName(Field f) {
+    return getFieldName(fieldNamingPolicy, f);
+  }
+
+  static String getFieldName(FieldNamingStrategy fieldNamingPolicy, Field f) {
     SerializedName serializedName = f.getAnnotation(SerializedName.class);
     return serializedName == null ? fieldNamingPolicy.translateName(f) : serializedName.value();
   }
@@ -98,6 +106,11 @@ public final class ReflectiveTypeAdapterFactory implements TypeAdapterFactory {
           field.set(value, fieldValue);
         }
       }
+      public boolean writeField(Object value) throws IOException, IllegalAccessException {
+        if (!serialized) return false;
+        Object fieldValue = field.get(value);
+        return fieldValue != value; // avoid recursion for example for Throwable.cause
+      }
     };
   }
 
@@ -151,7 +164,7 @@ public final class ReflectiveTypeAdapterFactory implements TypeAdapterFactory {
       this.serialized = serialized;
       this.deserialized = deserialized;
     }
-
+    abstract boolean writeField(Object value) throws IOException, IllegalAccessException;
     abstract void write(JsonWriter writer, Object value) throws IOException, IllegalAccessException;
     abstract void read(JsonReader reader, Object value) throws IOException, IllegalAccessException;
   }
@@ -202,7 +215,7 @@ public final class ReflectiveTypeAdapterFactory implements TypeAdapterFactory {
       out.beginObject();
       try {
         for (BoundField boundField : boundFields.values()) {
-          if (boundField.serialized) {
+          if (boundField.writeField(value)) {
             out.name(boundField.name);
             boundField.write(out, value);
           }

src/com/massivecraft/massivecore/xlib/gson/internal/bind/TypeAdapters.java

@@ -746,10 +746,7 @@ public final class TypeAdapters {
     }
   }
 
-  public static final TypeAdapterFactory ENUM_FACTORY = newEnumTypeHierarchyFactory();
+  public static final TypeAdapterFactory ENUM_FACTORY = new TypeAdapterFactory() {
-
-  public static TypeAdapterFactory newEnumTypeHierarchyFactory() {
-    return new TypeAdapterFactory() {
     @SuppressWarnings({"rawtypes", "unchecked"})
     public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
       Class<? super T> rawType = typeToken.getRawType();
@@ -762,7 +759,6 @@ public final class TypeAdapters {
       return (TypeAdapter<T>) new EnumTypeAdapter(rawType);
     }
   };
-  }
 
   public static <TT> TypeAdapterFactory newFactory(
       final TypeToken<TT> type, final TypeAdapter<TT> typeAdapter) {

src/com/massivecraft/massivecore/xlib/gson/stream/JsonReader.java

@@ -364,6 +364,7 @@ public class JsonReader implements Closeable {
     }
     if (p == PEEKED_END_ARRAY) {
       stackSize--;
+      pathIndices[stackSize - 1]++;
       peeked = PEEKED_NONE;
     } else {
       throw new IllegalStateException("Expected END_ARRAY but was " + peek()
@@ -401,6 +402,7 @@ public class JsonReader implements Closeable {
     if (p == PEEKED_END_OBJECT) {
       stackSize--;
       pathNames[stackSize] = null; // Free the last path name so that it can be garbage collected!
+      pathIndices[stackSize - 1]++;
       peeked = PEEKED_NONE;
     } else {
       throw new IllegalStateException("Expected END_OBJECT but was " + peek()