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/*
* 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;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Resource;
/**
* Iterator of FileResources from filenames.
* @since Ant 1.7
*/
public class FileResourceIterator implements Iterator<Resource> {
private Project project;
private File basedir;
private String[] files;
private int pos = 0;
/**
* Construct a new FileResourceIterator.
* @deprecated in favor of {@link FileResourceIterator#FileResourceIterator(Project)}
*/
public FileResourceIterator() {
}
/**
* Create a new FileResourceIterator.
* @param project associated Project instance
* @since Ant 1.8
*/
public FileResourceIterator(Project project) {
this.project = project;
}
/**
* Construct a new FileResourceIterator relative to the specified
* base directory.
* @param basedir the base directory of this instance.
* @deprecated in favor of {@link FileResourceIterator#FileResourceIterator(Project, File)}
*/
public FileResourceIterator(File basedir) {
this(null, basedir);
}
/**
* Construct a new FileResourceIterator relative to the specified
* base directory.
* @param project associated Project instance
* @param basedir the base directory of this instance.
* @since Ant 1.8
*/
public FileResourceIterator(Project project, File basedir) {
this(project);
this.basedir = basedir;
}
/**
* Construct a new FileResourceIterator over the specified filenames,
* relative to the specified base directory.
* @param basedir the base directory of this instance.
* @param filenames the String[] of filenames.
* @deprecated in favor of {@link FileResourceIterator#FileResourceIterator(Project, File, String[])}
*/
public FileResourceIterator(File basedir, String[] filenames) {
this(null, basedir, filenames);
}
/**
* Construct a new FileResourceIterator over the specified filenames,
* relative to the specified base directory.
* @param project associated Project instance
* @param basedir the base directory of this instance.
* @param filenames the String[] of filenames.
* @since Ant 1.8
*/
public FileResourceIterator(Project project, File basedir, String[] filenames) {
this(project, basedir);
addFiles(filenames);
}
/**
* 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 Resource 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();
}
FileResource result = new FileResource(basedir, files[pos++]);
result.setProject(project);
return result;
}
}
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