| /* |
| * 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.commons.jelly.tags.ant; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.tools.ant.DirectoryScanner; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.types.FileSet; |
| |
| /** |
| * <p><code>FileIterator</code> is an iterator over a |
| * over a number of files from a collection of FileSet instances. |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @version $Revision$ |
| */ |
| public class FileIterator implements Iterator { |
| |
| /** The iterator over the FileSet objects */ |
| private Iterator fileSetIterator; |
| |
| /** The Ant project */ |
| private Project project; |
| |
| /** The directory scanner */ |
| private DirectoryScanner ds; |
| |
| /** The file names in the current FileSet scan */ |
| private String[] files; |
| |
| /** The current index into the file name array */ |
| private int fileIndex = -1; |
| |
| /** The next File object we'll iterate over */ |
| private File nextFile; |
| |
| /** Have we set a next object? */ |
| private boolean nextObjectSet = false; |
| |
| /** Return only directories? */ |
| private boolean iterateDirectories = false; |
| |
| public FileIterator(Project project, |
| Iterator fileSetIterator) { |
| this( project, fileSetIterator, false); |
| } |
| |
| public FileIterator(Project project, |
| Iterator fileSetIterator, |
| boolean iterateDirectories) { |
| this.project = project; |
| this.fileSetIterator = fileSetIterator; |
| this.iterateDirectories = iterateDirectories; |
| } |
| |
| // Iterator interface |
| //------------------------------------------------------------------------- |
| |
| /** @return true if there is another object that matches the given predicate */ |
| public boolean hasNext() { |
| if ( nextObjectSet ) { |
| return true; |
| } |
| else { |
| return setNextObject(); |
| } |
| } |
| |
| /** @return the next object which matches the given predicate */ |
| public Object next() { |
| if ( !nextObjectSet ) { |
| if (!setNextObject()) { |
| throw new NoSuchElementException(); |
| } |
| } |
| nextObjectSet = false; |
| return nextFile; |
| } |
| |
| /** |
| * throws UnsupportedOperationException |
| */ |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| // Implementation methods |
| //------------------------------------------------------------------------- |
| |
| /** |
| * Set nextObject to the next object. If there are no more |
| * objects then return false. Otherwise, return true. |
| */ |
| private boolean setNextObject() { |
| while (true) { |
| while (ds == null) { |
| if ( ! fileSetIterator.hasNext() ) { |
| return false; |
| } |
| FileSet fs = (FileSet) fileSetIterator.next(); |
| ds = fs.getDirectoryScanner(project); |
| ds.scan(); |
| if (iterateDirectories) { |
| files = ds.getIncludedDirectories(); |
| } |
| else { |
| files = ds.getIncludedFiles(); |
| } |
| if ( files.length > 0 ) { |
| fileIndex = -1; |
| break; |
| } |
| else { |
| ds = null; |
| } |
| } |
| |
| if ( ds != null && files != null ) { |
| if ( ++fileIndex < files.length ) { |
| nextFile = new File( ds.getBasedir(), files[fileIndex] ); |
| nextObjectSet = true; |
| return true; |
| } |
| else { |
| ds = null; |
| } |
| } |
| } |
| } |
| } |
| |
| |