| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. 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. For additional information regarding |
| * copyright in this work, please see the NOTICE file in the top level |
| * directory of this distribution. |
| */ |
| package org.apache.abdera2.common.templates; |
| |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| public class MultiContext |
| extends CachingContext { |
| |
| private static final long serialVersionUID = 1691294411780004133L; |
| private final Set<Context> contexts = |
| new HashSet<Context>(); |
| |
| public MultiContext(Context... contexts) { |
| for (Context context : contexts) |
| this.contexts.add(context); |
| } |
| |
| public MultiContext(Iterable<Context> contexts) { |
| for (Context context : contexts) |
| this.contexts.add(context); |
| } |
| |
| public MultiContext(Collection<Context> contexts) { |
| if (contexts == null) |
| throw new IllegalArgumentException(); |
| this.contexts.addAll(contexts); |
| } |
| |
| public void add(Context context) { |
| if (context == null) |
| throw new IllegalArgumentException(); |
| this.contexts.add(context); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void add(Object object) { |
| this.contexts.add( |
| object instanceof Context ? |
| (Context)object : |
| object instanceof Map ? |
| new MapContext((Map<String,Object>)object) : |
| new ObjectContext(object) |
| ); |
| } |
| |
| public boolean contains(String var) { |
| for (Context context : contexts) |
| if (context.contains(var)) |
| return true; |
| return false; |
| } |
| |
| public Iterator<String> iterator() { |
| Set<String> names = new HashSet<String>(); |
| for (Context context : contexts) |
| for (String name : context) |
| names.add(name); |
| return names.iterator(); |
| } |
| |
| @Override |
| protected <T> T resolveActual(String var) { |
| for (Context context : contexts) |
| if (context.contains(var)) |
| return context.resolve(var); |
| return null; |
| } |
| |
| |
| } |