| /* |
| * 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.codehaus.groovy.ant; |
| |
| import org.apache.tools.ant.DirectoryScanner; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.types.FileSet; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * <p><code>FileIterator</code> is an iterator over a |
| * number of files from a collection of FileSet instances. |
| */ |
| public class FileIterator implements Iterator<File> { |
| |
| /* The iterator over the FileSet objects */ |
| private final Iterator<FileSet> fileSetIterator; |
| |
| /* The Ant project */ |
| private final 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 final boolean iterateDirectories; |
| |
| public FileIterator(Project project, Iterator<FileSet> fileSetIterator) { |
| this(project, fileSetIterator, false); |
| } |
| |
| public FileIterator(Project project, Iterator<FileSet> 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 |
| */ |
| @Override |
| public boolean hasNext() { |
| if (nextObjectSet) { |
| return true; |
| } else { |
| return setNextObject(); |
| } |
| } |
| |
| /** |
| * @return the next object which matches the given predicate |
| */ |
| @Override |
| public File next() { |
| if (!nextObjectSet) { |
| if (!setNextObject()) { |
| throw new NoSuchElementException(); |
| } |
| } |
| nextObjectSet = false; |
| return nextFile; |
| } |
| |
| /** |
| * throws UnsupportedOperationException |
| */ |
| @Override |
| 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 = 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; |
| } |
| } |
| } |
| } |
| } |
| |
| |