001 /* 002 * $Header: /home/projects/groovy/scm/groovy/groovy-core/src/main/org/codehaus/groovy/ant/FileIterator.java,v 1.1 2003/12/10 18:08:17 jstrachan Exp $ 003 * $Revision: 1.1 $ 004 * $Date: 2003/12/10 18:08:17 $ 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,v 1.1 2003/12/10 18:08:17 jstrachan Exp $ 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: 1.1 $ 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, 106 Iterator fileSetIterator) { 107 this( project, fileSetIterator, false); 108 } 109 110 public FileIterator(Project project, 111 Iterator fileSetIterator, 112 boolean iterateDirectories) { 113 this.project = project; 114 this.fileSetIterator = fileSetIterator; 115 this.iterateDirectories = iterateDirectories; 116 } 117 118 // Iterator interface 119 //------------------------------------------------------------------------- 120 121 /** @return true if there is another object that matches the given predicate */ 122 public boolean hasNext() { 123 if ( nextObjectSet ) { 124 return true; 125 } 126 else { 127 return setNextObject(); 128 } 129 } 130 131 /** @return the next object which matches the given predicate */ 132 public Object next() { 133 if ( !nextObjectSet ) { 134 if (!setNextObject()) { 135 throw new NoSuchElementException(); 136 } 137 } 138 nextObjectSet = false; 139 return nextFile; 140 } 141 142 /** 143 * throws UnsupportedOperationException 144 */ 145 public void remove() { 146 throw new UnsupportedOperationException(); 147 } 148 149 // Implementation methods 150 //------------------------------------------------------------------------- 151 152 /** 153 * Set nextObject to the next object. If there are no more 154 * objects then return false. Otherwise, return true. 155 */ 156 private boolean setNextObject() { 157 while (true) { 158 while (ds == null) { 159 if ( ! fileSetIterator.hasNext() ) { 160 return false; 161 } 162 FileSet fs = (FileSet) fileSetIterator.next(); 163 ds = fs.getDirectoryScanner(project); 164 ds.scan(); 165 if (iterateDirectories) { 166 files = ds.getIncludedDirectories(); 167 } 168 else { 169 files = ds.getIncludedFiles(); 170 } 171 if ( files.length > 0 ) { 172 fileIndex = -1; 173 break; 174 } 175 else { 176 ds = null; 177 } 178 } 179 180 if ( ds != null && files != null ) { 181 if ( ++fileIndex < files.length ) { 182 nextFile = new File( ds.getBasedir(), files[fileIndex] ); 183 nextObjectSet = true; 184 return true; 185 } 186 else { 187 ds = null; 188 } 189 } 190 } 191 } 192 } 193 194