| /* |
| |
| Derby - Class org.apache.derby.impl.store.raw.data.ContainerActionOnCommit |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to you 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.apache.derby.impl.store.raw.data; |
| |
| import org.apache.derby.iapi.store.raw.ContainerKey; |
| |
| import java.util.Observer; |
| |
| /** |
| An Observer that can be attached to a transaction to |
| implement some action when the transaction |
| commits or rollsback in some way. |
| */ |
| |
| abstract class ContainerActionOnCommit implements Observer { |
| |
| protected ContainerKey identity; |
| |
| protected ContainerActionOnCommit(ContainerKey identity) { |
| |
| this.identity = identity; |
| } |
| |
| public int hashCode() { |
| return identity.hashCode(); |
| } |
| |
| /** |
| An equals method that returns true if the other obejct |
| is a sub-class of this, and the container identities |
| are equal *and* it is the same class as this. |
| <BR> |
| This allows mutiple additions of value equality |
| obejcts to the observer list while only retaining one. |
| */ |
| public boolean equals(Object other) { |
| if (other instanceof ContainerActionOnCommit) { |
| if (!identity.equals(((ContainerActionOnCommit) other).identity)) |
| return false; |
| |
| // the class of the types must match as well |
| return getClass().equals(other.getClass()); |
| } |
| return false; |
| } |
| } |