| /* |
| * 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.tools.ant.types.resources; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * Iterator of FileResources from filenames. |
| * @since Ant 1.7 |
| */ |
| public class FileResourceIterator implements Iterator { |
| private File basedir; |
| private String[] files; |
| private int pos = 0; |
| |
| /** |
| * Construct a new FileResourceIterator. |
| */ |
| public FileResourceIterator() { |
| } |
| |
| /** |
| * Construct a new FileResourceIterator relative to the specified |
| * base directory. |
| * @param f the base directory of this instance. |
| */ |
| public FileResourceIterator(File f) { |
| basedir = f; |
| } |
| |
| /** |
| * Construct a new FileResourceIterator over the specified filenames, |
| * relative to the specified base directory. |
| * @param f the base directory of this instance. |
| * @param s the String[] of filenames. |
| */ |
| public FileResourceIterator(File f, String[] s) { |
| this(f); |
| addFiles(s); |
| } |
| |
| /** |
| * Add an array of filenames to this FileResourceIterator. |
| * @param s the filenames to add. |
| */ |
| public void addFiles(String[] s) { |
| int start = (files == null) ? 0 : files.length; |
| String[] newfiles = new String[start + s.length]; |
| if (start > 0) { |
| System.arraycopy(files, 0, newfiles, 0, start); |
| } |
| files = newfiles; |
| System.arraycopy(s, 0, files, start, s.length); |
| } |
| |
| /** |
| * Find out whether this FileResourceIterator has more elements. |
| * @return whether there are more Resources to iterate over. |
| */ |
| public boolean hasNext() { |
| return pos < files.length; |
| } |
| |
| /** |
| * Get the next element from this FileResourceIterator. |
| * @return the next Object. |
| */ |
| public Object next() { |
| return nextResource(); |
| } |
| |
| /** |
| * Not implemented. |
| */ |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Convenience method to return the next resource. |
| * @return the next File. |
| */ |
| public FileResource nextResource() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| return new FileResource(basedir, files[pos++]); |
| } |
| |
| } |