- /*
- * Copyright 2000-2004 The Apache Software Foundation
- *
- * Licensed 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.util;
-
- import java.io.File;
- import java.util.Vector;
- import org.apache.tools.ant.Task;
- import org.apache.tools.ant.types.ResourceFactory;
- import org.apache.tools.ant.types.Resource;
-
- /**
- * Utility class that collects the functionality of the various
- * scanDir methods that have been scattered in several tasks before.
- *
- * <p>The only method returns an array of source files. The array is a
- * subset of the files given as a parameter and holds only those that
- * are newer than their corresponding target files.</p>
- *
- */
- public class SourceFileScanner implements ResourceFactory {
-
- protected Task task;
-
- private FileUtils fileUtils;
- private File destDir; // base directory of the fileset
-
- /**
- * @param task The task we should log messages through
- */
- public SourceFileScanner(Task task) {
- this.task = task;
- fileUtils = FileUtils.newFileUtils();
- }
-
- /**
- * Restrict the given set of files to those that are newer than
- * their corresponding target files.
- *
- * @param files the original set of files
- * @param srcDir all files are relative to this directory
- * @param destDir target files live here. if null file names
- * returned by the mapper are assumed to be absolute.
- * @param mapper knows how to construct a target file names from
- * source file names.
- */
- public String[] restrict(String[] files, File srcDir, File destDir,
- FileNameMapper mapper) {
- return restrict(files, srcDir, destDir, mapper,
- fileUtils.getFileTimestampGranularity());
- }
-
- /**
- * Restrict the given set of files to those that are newer than
- * their corresponding target files.
- *
- * @param files the original set of files
- * @param srcDir all files are relative to this directory
- * @param destDir target files live here. if null file names
- * returned by the mapper are assumed to be absolute.
- * @param mapper knows how to construct a target file names from
- * source file names.
- * @param granularity The number of milliseconds leeway to give
- * before deciding a target is out of date.
- *
- * @since Ant 1.6.2
- */
- public String[] restrict(String[] files, File srcDir, File destDir,
- FileNameMapper mapper, long granularity) {
- // record destdir for later use in getResource
- this.destDir = destDir;
- Vector v = new Vector();
- for (int i = 0; i < files.length; i++) {
- File src = fileUtils.resolveFile(srcDir, files[i]);
- v.addElement(new Resource(files[i], src.exists(),
- src.lastModified(), src.isDirectory()));
- }
- Resource[] sourceresources = new Resource[v.size()];
- v.copyInto(sourceresources);
-
- // build the list of sources which are out of date with
- // respect to the target
- Resource[] outofdate =
- ResourceUtils.selectOutOfDateSources(task, sourceresources,
- mapper, this, granularity);
- String[] result = new String[outofdate.length];
- for (int counter = 0; counter < outofdate.length; counter++) {
- result[counter] = outofdate[counter].getName();
- }
- return result;
- }
-
- /**
- * Convinience layer on top of restrict that returns the source
- * files as File objects (containing absolute paths if srcDir is
- * absolute).
- */
- public File[] restrictAsFiles(String[] files, File srcDir, File destDir,
- FileNameMapper mapper) {
- return restrictAsFiles(files, srcDir, destDir, mapper,
- fileUtils.getFileTimestampGranularity());
- }
-
- /**
- * Convinience layer on top of restrict that returns the source
- * files as File objects (containing absolute paths if srcDir is
- * absolute).
- *
- * @since Ant 1.6.2
- */
- public File[] restrictAsFiles(String[] files, File srcDir, File destDir,
- FileNameMapper mapper, long granularity) {
- String[] res = restrict(files, srcDir, destDir, mapper, granularity);
- File[] result = new File[res.length];
- for (int i = 0; i < res.length; i++) {
- result[i] = new File(srcDir, res[i]);
- }
- return result;
- }
-
- /**
- * returns resource information for a file at destination
- * @param name relative path of file at destination
- * @return data concerning a file whose relative path to destDir is name
- *
- * @since Ant 1.5.2
- */
- public Resource getResource(String name) {
- File src = fileUtils.resolveFile(destDir, name);
- return new Resource(name, src.exists(), src.lastModified(),
- src.isDirectory());
- }
- }
-