/*
* Copyright 2015 the original author or authors.
*
* 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.gradle.api.internal.file.collections;
import com.google.common.base.Charsets;
import org.gradle.api.JavaVersion;
import org.gradle.api.internal.file.collections.jdk7.Jdk7DirectoryWalker;
import org.gradle.internal.Factory;
import org.gradle.internal.nativeintegration.services.FileSystems;
import org.gradle.internal.nativeplatform.filesystem.FileSystem;
import java.nio.charset.Charset;
public class DefaultDirectoryWalkerFactory implements Factory<DirectoryWalker> {
private final JavaVersion javaVersion;
private final FileSystem fileSystem;
private DirectoryWalker instance;
public DefaultDirectoryWalkerFactory(JavaVersion javaVersion, FileSystem fileSystem) {
this.javaVersion = javaVersion;
this.fileSystem = fileSystem;
reset();
}
DefaultDirectoryWalkerFactory() {
this(JavaVersion.current(), FileSystems.getDefault());
}
public DirectoryWalker create() {
return instance;
}
private void reset() {
this.instance = createInstance();
}
private DirectoryWalker createInstance() {
if (javaVersion.isJava8Compatible() || (javaVersion.isJava7Compatible() && defaultEncodingContainsPlatformEncoding())) {
return new Jdk7DirectoryWalker(fileSystem);
} else {
return new DefaultDirectoryWalker(fileSystem);
}
}
private boolean defaultEncodingContainsPlatformEncoding() {
// sun.jnu.encoding is the platform encoding used to decode/encode file paths, command line arguments, etc.
// it's derived from LANG/LC_ALL/LC_CTYPE on Unixes and should not be set by the user
String platformEncoding = System.getProperty("sun.jnu.encoding");
Charset platformCharset = platformEncoding != null && Charset.isSupported(platformEncoding) ? Charset.forName(platformEncoding) : null;
// fallback to require UTF-8 when platformCharset cannot be resolved
Charset requiredCharset = platformCharset != null ? platformCharset : Charsets.UTF_8;
return Charset.defaultCharset().contains(requiredCharset);
}
}