/*
* 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.servlets.resolver.resource;
import java.util.HashSet;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Set;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceProvider;
import org.apache.sling.api.resource.SyntheticResource;
class ServletResourceIterator implements Iterator<Resource> {
private final ServletResourceProvider provider;
private final Resource parentResource;
private Iterator<String> pathIter;
private String parentPath;
private Resource next;
private Set<String> visited;
ServletResourceIterator(ServletResourceProvider provider, Resource parent) {
this.provider = provider;
this.parentResource = parent;
pathIter = provider.getServletPathIterator();
parentPath = parent.getPath();
if (!parentPath.endsWith("/")) {
parentPath = parentPath.concat("/");
}
visited = new HashSet<String>();
next = seek();
}
public boolean hasNext() {
return next != null;
}
public Resource next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
Resource result = next;
next = seek();
return result;
}
public void remove() {
throw new UnsupportedOperationException("remove");
}
private Resource seek() {
while (pathIter.hasNext()) {
String path = pathIter.next();
if (path.startsWith(parentPath)) {
int nextSlash = path.indexOf('/', parentPath.length());
if (nextSlash < 0) {
return new ServletResource(
parentResource.getResourceResolver(),
provider.getServlet(), path);
}
path = path.substring(0, nextSlash);
if (!visited.contains(path)) {
visited.add(path);
if (parentResource.getResourceResolver().getResource(path) == null) {
return new SyntheticResource(
parentResource.getResourceResolver(), path,
ResourceProvider.RESOURCE_TYPE_SYNTHETIC);
}
}
}
}
return null;
}
}