| /* |
| * 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.commons.chain2.base; |
| |
| import java.util.Map; |
| |
| import org.apache.commons.chain2.Command; |
| import org.apache.commons.chain2.Context; |
| |
| /** |
| * <p>Override any context attribute stored under the <code>key</code> with <code>value</code>.</p> |
| * |
| * @param <K> the type of keys maintained by the context associated with this catalog |
| * @param <V> the type of mapped values |
| * @param <C> Type of the context associated with this command |
| * |
| * @version $Id$ |
| */ |
| public class OverrideCommand<K, V, C extends Map<K, V>> implements Command<K, V, C> { |
| |
| // -------------------------------------------------------------- Properties |
| |
| private K key = null; |
| private V value = null; |
| |
| /** |
| * <p>Return the context attribute key for the attribute to override.</p> |
| * @return The context attribute key. |
| */ |
| public K getKey() { |
| return key; |
| } |
| |
| /** |
| * <p>Set the context attribute key for the attribute to override.</p> |
| * |
| * @param key The new key |
| */ |
| public void setKey(K key) { |
| this.key = key; |
| } |
| |
| /** |
| * <p>Return the value that should override context attribute with key <code>key</code>.</p> |
| * @return The value. |
| */ |
| public V getValue() { |
| return value; |
| } |
| |
| /** |
| * <p>Set the value that should override context attribute with key <code>key</code>.</p> |
| * |
| * @param value The new value |
| */ |
| public void setValue(V value) { |
| this.value = value; |
| } |
| |
| // ---------------------------------------------------------- Filter Methods |
| |
| /** |
| * <p>Override the attribute specified by <code>key</code> with <code>value</code>.</p> |
| * |
| * @param context {@link org.apache.commons.chain2.Context} in which we are operating |
| * |
| * @return <code>false</code> so that processing will continue |
| * @throws org.apache.commons.chain2.ChainException if and error occurs. |
| */ |
| public boolean execute(C context) { |
| if (context.containsKey(getKey())) { |
| context.put(getKey(), getValue()); |
| } |
| return false; |
| } |
| |
| } |