com.google.gwt.dev.util.OutputFileSetOnDirectory Maven / Gradle / Ivy
/*
* Copyright 2009 Google Inc.
*
* 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 com.google.gwt.dev.util;
import com.google.gwt.dev.util.collect.HashSet;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Set;
/**
* An {@link OutputFileSet} on a directory.
*/
public class OutputFileSetOnDirectory extends OutputFileSet {
private final Set createdDirs = new HashSet();
private final File dir;
private final String prefix;
public OutputFileSetOnDirectory(File dir, String prefix) {
super(dir.getAbsolutePath());
this.dir = dir;
this.prefix = prefix;
}
@Override
public void close() {
}
@Override
protected OutputStream createNewOutputStream(String path,
final long timeStampMillis) throws IOException {
final File file = pathToFile(path);
mkdirs(file.getParentFile());
return new FileOutputStream(file) {
@Override
public void close() throws IOException {
super.close();
if (timeStampMillis != TIMESTAMP_UNAVAILABLE) {
file.setLastModified(timeStampMillis);
}
}
};
}
/**
* A faster bulk version of {@link File#mkdirs()} that avoids recreating the
* same directory multiple times.
*/
private void mkdirs(File dir) throws IOException {
if (dir == null) {
return;
}
String path = dir.getPath();
if (createdDirs.contains(path)) {
return;
}
createdDirs.add(path);
if (!dir.exists()) {
mkdirs(dir.getParentFile());
if (!dir.mkdir()) {
throw new IOException("unable to create directory: " + dir.getAbsolutePath());
}
}
}
private File pathToFile(String path) throws IOException {
return new File(dir, prefix + path).getCanonicalFile();
}
}