001: /*
002: * $Header$
003: * $Revision: 388 $
004: * $Date: 2003-12-10 19:08:26 +0100 (Mi, 10 Dez 2003) $
005: *
006: * ====================================================================
007: *
008: * The Apache Software License, Version 1.1
009: *
010: * Copyright (c) 2002 The Apache Software Foundation. All rights
011: * reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions
015: * are met:
016: *
017: * 1. Redistributions of source code must retain the above copyright
018: * notice, this list of conditions and the following disclaimer.
019: *
020: * 2. Redistributions in binary form must reproduce the above copyright
021: * notice, this list of conditions and the following disclaimer in
022: * the documentation and/or other materials provided with the
023: * distribution.
024: *
025: * 3. The end-user documentation included with the redistribution, if
026: * any, must include the following acknowlegement:
027: * "This product includes software developed by the
028: * Apache Software Foundation (http://www.apache.org/)."
029: * Alternately, this acknowlegement may appear in the software itself,
030: * if and wherever such third-party acknowlegements normally appear.
031: *
032: * 4. The names "The Jakarta Project", "Commons", and "Apache Software
033: * Foundation" must not be used to endorse or promote products derived
034: * from this software without prior written permission. For written
035: * permission, please contact apache@apache.org.
036: *
037: * 5. Products derived from this software may not be called "Apache"
038: * nor may "Apache" appear in their names without prior written
039: * permission of the Apache Group.
040: *
041: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052: * SUCH DAMAGE.
053: * ====================================================================
054: *
055: * This software consists of voluntary contributions made by many
056: * individuals on behalf of the Apache Software Foundation. For more
057: * information on the Apache Software Foundation, please see
058: * <http://www.apache.org/>.
059: *
060: * $Id: FileIterator.java 388 2003-12-10 18:08:26Z jstrachan $
061: */
062: package org.codehaus.groovy.ant;
063:
064: import java.io.File;
065: import java.util.Iterator;
066: import java.util.NoSuchElementException;
067:
068: import org.apache.tools.ant.DirectoryScanner;
069: import org.apache.tools.ant.Project;
070: import org.apache.tools.ant.types.FileSet;
071:
072: /**
073: * <p><code>FileIterator</code> is an iterator over a
074: * over a number of files from a colleciton of FileSet instances.
075: *
076: * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
077: * @version $Revision: 388 $
078: */
079: public class FileIterator implements Iterator {
080:
081: /** The iterator over the FileSet objects */
082: private Iterator fileSetIterator;
083:
084: /** The Ant project */
085: private Project project;
086:
087: /** The directory scanner */
088: private DirectoryScanner ds;
089:
090: /** The file names in the current FileSet scan */
091: private String[] files;
092:
093: /** The current index into the file name array */
094: private int fileIndex = -1;
095:
096: /** The next File object we'll iterate over */
097: private File nextFile;
098:
099: /** Have we set a next object? */
100: private boolean nextObjectSet = false;
101:
102: /** Return only directories? */
103: private boolean iterateDirectories = false;
104:
105: public FileIterator(Project project, Iterator fileSetIterator) {
106: this (project, fileSetIterator, false);
107: }
108:
109: public FileIterator(Project project, Iterator fileSetIterator,
110: boolean iterateDirectories) {
111: this .project = project;
112: this .fileSetIterator = fileSetIterator;
113: this .iterateDirectories = iterateDirectories;
114: }
115:
116: // Iterator interface
117: //-------------------------------------------------------------------------
118:
119: /** @return true if there is another object that matches the given predicate */
120: public boolean hasNext() {
121: if (nextObjectSet) {
122: return true;
123: } else {
124: return setNextObject();
125: }
126: }
127:
128: /** @return the next object which matches the given predicate */
129: public Object next() {
130: if (!nextObjectSet) {
131: if (!setNextObject()) {
132: throw new NoSuchElementException();
133: }
134: }
135: nextObjectSet = false;
136: return nextFile;
137: }
138:
139: /**
140: * throws UnsupportedOperationException
141: */
142: public void remove() {
143: throw new UnsupportedOperationException();
144: }
145:
146: // Implementation methods
147: //-------------------------------------------------------------------------
148:
149: /**
150: * Set nextObject to the next object. If there are no more
151: * objects then return false. Otherwise, return true.
152: */
153: private boolean setNextObject() {
154: while (true) {
155: while (ds == null) {
156: if (!fileSetIterator.hasNext()) {
157: return false;
158: }
159: FileSet fs = (FileSet) fileSetIterator.next();
160: ds = fs.getDirectoryScanner(project);
161: ds.scan();
162: if (iterateDirectories) {
163: files = ds.getIncludedDirectories();
164: } else {
165: files = ds.getIncludedFiles();
166: }
167: if (files.length > 0) {
168: fileIndex = -1;
169: break;
170: } else {
171: ds = null;
172: }
173: }
174:
175: if (ds != null && files != null) {
176: if (++fileIndex < files.length) {
177: nextFile = new File(ds.getBasedir(),
178: files[fileIndex]);
179: nextObjectSet = true;
180: return true;
181: } else {
182: ds = null;
183: }
184: }
185: }
186: }
187: }
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