built against CB 1000

Signed-off-by: locutus <bladedpenguin@gmail.com>

src/org/mcteam/ancientgates/gson/JsonNull.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.mcteam.ancientgates.gson;
+
+import java.io.IOException;
+
+/**
+ * A class representing a Json {@code null} value.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ * @since 1.2
+ */
+public final class JsonNull extends JsonElement {
+  private static final JsonNull INSTANCE = new JsonNull();
+
+  /**
+   * Creates a new JsonNull object.
+   */
+  public JsonNull() {
+    // Do nothing
+  }
+  
+  @Override
+  protected void toString(Appendable sb, Escaper escaper) throws IOException {
+    sb.append("null");
+  }
+  
+  /**
+   * All instances of JsonNull have the same hash code since they are indistinguishable
+   */
+  @Override
+  public int hashCode() {
+    return JsonNull.class.hashCode();
+  }
+  
+  /**
+   * All instances of JsonNull are the same
+   */
+  @Override
+  public boolean equals(Object other) {
+    return other instanceof JsonNull;
+  }
+  
+  /**
+   * Creation method used to return an instance of a {@link JsonNull}.  To reduce the memory
+   * footprint, a single object has been created for this class; therefore the same instance is
+   * being returned for each invocation of this method. This method is kept private since we 
+   * prefer the users to use {@link JsonNull#JsonNull()} which is similar to how other JsonElements
+   * are created. Note that all instances of JsonNull return true for {@link #equals(Object)} 
+   * when compared to each other.
+   *
+   * @return a instance of a {@link JsonNull}
+   */
+  static JsonNull createJsonNull() {
+    return INSTANCE;
+  }
+}