| /* |
| * Copyright 2009 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 com.google.gwt.rpc.client.ast; |
| |
| /** |
| * Represents a type hierarchy of values that do not maintain object identity on |
| * the client. |
| */ |
| public abstract class ScalarValueCommand extends ValueCommand { |
| @Override |
| public final boolean equals(Object o) { |
| if (!(o instanceof ScalarValueCommand)) { |
| return false; |
| } |
| ScalarValueCommand other = (ScalarValueCommand) o; |
| Object myValue = getValue(); |
| Object otherValue = other.getValue(); |
| if (myValue == null && otherValue == null) { |
| return true; |
| } else if (myValue == null && otherValue != null) { |
| return false; |
| } else { |
| return myValue.equals(otherValue); |
| } |
| } |
| |
| /** |
| * Returns the value represented by the ScalarValueCommand. |
| */ |
| public abstract Object getValue(); |
| |
| @Override |
| public final int hashCode() { |
| return getValue() == null ? 0 : getValue().hashCode(); |
| } |
| } |