| /* |
| * $Id$ |
| * |
| * 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.tiles.request.velocity.extractor; |
| |
| import java.util.Enumeration; |
| |
| import org.apache.tiles.request.attribute.AttributeExtractor; |
| import org.apache.velocity.context.Context; |
| |
| /** |
| * Extracts attributes from Velocity context.. |
| * |
| * @version $Rev$ $Date$ |
| */ |
| public class VelocityScopeExtractor implements AttributeExtractor { |
| |
| /** |
| * The Velocity context. |
| */ |
| private Context context; |
| |
| /** |
| * Constructor. |
| * |
| * @param context The Velocity context. |
| */ |
| public VelocityScopeExtractor(Context context) { |
| this.context = context; |
| } |
| |
| @Override |
| public void removeValue(String name) { |
| context.remove(name); |
| } |
| |
| @Override |
| public Enumeration<String> getKeys() { |
| return new KeyEnumeration(context.getKeys()); |
| } |
| |
| @Override |
| public Object getValue(String key) { |
| return context.get(key); |
| } |
| |
| @Override |
| public void setValue(String key, Object value) { |
| context.put(key, value); |
| } |
| |
| /** |
| * Enumerates an array. |
| */ |
| private static class KeyEnumeration implements Enumeration<String> { |
| |
| /** |
| * The current index. |
| */ |
| private int index = 0; |
| |
| /** |
| * The array to enumerate. |
| */ |
| private Object[] keys; |
| |
| /** |
| * Constructor. |
| * |
| * @param keys The array to enumerate. |
| */ |
| public KeyEnumeration(Object[] keys) { |
| this.keys = keys; |
| } |
| |
| @Override |
| public boolean hasMoreElements() { |
| return index < keys.length; |
| } |
| |
| @Override |
| public String nextElement() { |
| return (String) keys[index++]; |
| } |
| } |
| } |