| /* |
| * 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.sling.superimposing.impl; |
| |
| import org.apache.sling.api.resource.Resource; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * Iterates over children of a {@link SuperimposingResource} by iterating over the children of the source resource |
| * and remapping and wrapping all children in SuperimposingResource instances. |
| */ |
| public class SuperimposingResourceIterator implements Iterator<Resource> { |
| |
| private final SuperimposingResourceProviderImpl superimposingProvider; |
| private final Iterator<Resource> decoratee; |
| |
| private Resource next; |
| |
| SuperimposingResourceIterator(SuperimposingResourceProviderImpl superimposingProvider, Iterator<Resource> decoratee) { |
| this.superimposingProvider = superimposingProvider; |
| this.decoratee = decoratee; |
| seek(); |
| } |
| |
| private void seek() { |
| next = null; |
| while (next == null && decoratee.hasNext()) { |
| final Resource resource = decoratee.next(); |
| final String superimposingPath = SuperimposingResourceProviderImpl.reverseMapPath(superimposingProvider, resource.getPath()); |
| if (null != superimposingPath) { |
| next = new SuperimposingResource(resource, superimposingPath); |
| } |
| } |
| } |
| |
| public boolean hasNext() { |
| return null != next; |
| } |
| |
| public Resource next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| final Resource current = next; |
| seek(); |
| return current; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| } |