| /* |
| * 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.resourceresolver.impl.helper; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * Iterate over the the HTTP request path by creating shorter segments of that |
| * path using "." as a separator. |
| * <p> |
| * For example, if path = /some/stuff.a4.html/xyz.ext the sequence is: |
| * <ol> |
| * <li> /some/stuff.a4.html/xyz.ext </li> |
| * <li> /some/stuff.a4.html/xyz </li> |
| * <li> /some/stuff.a4</li> |
| * <li> /some/stuff </li> |
| * </ol> |
| * <p> |
| * The root path (/) is never returned. |
| */ |
| public class ResourcePathIterator implements Iterator<String> { |
| |
| // the next path to return, null if nothing more to return |
| private String nextPath; |
| |
| /** |
| * Creates a new instance iterating over the given path |
| * |
| * @param path The path to iterate over. If this is empty or |
| * <code>null</code> this iterator will not return anything. |
| */ |
| public ResourcePathIterator(String path) { |
| |
| if (path == null || path.length() == 0) { |
| |
| // null or empty path, there is nothing to return |
| nextPath = null; |
| |
| } else { |
| |
| // find last non-slash character |
| int i = path.length() - 1; |
| while (i >= 0 && path.charAt(i) == '/') { |
| i--; |
| } |
| |
| if (i < 0) { |
| // only slashes, assume root node |
| nextPath = "/"; |
| |
| } else if (i < path.length() - 1) { |
| // cut off slash |
| nextPath = path.substring(0, i + 1); |
| |
| } else { |
| // no trailing slash |
| nextPath = path; |
| } |
| } |
| } |
| |
| public boolean hasNext() { |
| return nextPath != null; |
| } |
| |
| public String next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| |
| final String result = nextPath; |
| |
| // find next path |
| int lastDot = nextPath.lastIndexOf('.'); |
| nextPath = (lastDot > 0) ? nextPath.substring(0, lastDot) : null; |
| |
| return result; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException("remove"); |
| } |
| |
| } |