/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.impl.compiler.file;
import juzu.impl.common.FileKey;
import juzu.impl.fs.spi.ReadFileSystem;
import juzu.impl.fs.spi.ReadWriteFileSystem;
import juzu.impl.common.Spliterator;
import juzu.impl.fs.spi.disk.DiskFileSystem;
import javax.tools.JavaFileObject;
import javax.tools.StandardLocation;
import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
/** @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> */
public class SimpleFileManager<P> extends FileManager {
public static <P> SimpleFileManager<P> wrap(StandardLocation location, ReadFileSystem<P> fs) {
return new SimpleFileManager<P>(location, fs);
}
/** . */
final StandardLocation location;
/** . */
final ReadFileSystem<P> fs;
/** . */
final Map<FileKey, JavaFileObjectImpl<P>> entries;
public SimpleFileManager(StandardLocation location, ReadFileSystem<P> fs) {
this.location = location;
this.fs = fs;
this.entries = new HashMap<FileKey, JavaFileObjectImpl<P>>();
}
public ReadFileSystem<P> getFileSystem() {
return fs;
}
@Override
public void populateRoots(Set<File> roots) throws IOException {
if (fs instanceof DiskFileSystem) {
roots.add(((DiskFileSystem)fs).getRoot());
}
}
public void clearCache() {
entries.clear();
}
public JavaFileObjectImpl getReadable(FileKey key) throws IOException {
JavaFileObjectImpl<P> entry = entries.get(key);
if (entry == null) {
P file = fs.getPath(key.names);
if (file != null && fs.isFile(file)) {
entries.put(key, entry = new JavaFileObjectImpl<P>(location, key, fs, file));
}
}
return entry;
}
public JavaFileObjectImpl getWritable(FileKey key) throws IOException {
JavaFileObjectImpl entry = getReadable(key);
if (entry == null) {
if (fs instanceof ReadWriteFileSystem<?>) {
ReadWriteFileSystem<P> rwFS = (ReadWriteFileSystem<P>)fs;
P file = rwFS.makePath(key.names);
entries.put(key, entry = new JavaFileObjectImpl<P>(location, key, fs, file));
}
else {
throw new IOException("File system is not writable");
}
}
return entry;
}
@Override
public <C extends Collection<JavaFileObject>> C list(
String packageName,
Set<JavaFileObject.Kind> kinds,
boolean recurse,
C to) throws IOException {
Iterable<String> packageNames = Spliterator.split(packageName, '.');
P dir = fs.getPath(packageNames);
if (dir != null && fs.isDir(dir)) {
list(packageName, dir, kinds, recurse, to);
}
return to;
}
private void list(
String packageName,
P root,
Set<JavaFileObject.Kind> kinds,
boolean recurse,
Collection<JavaFileObject> to) throws IOException {
for (Iterator<P> i = fs.getChildren(root);i.hasNext();) {
P child = i.next();
if (fs.isDir(child)) {
if (recurse) {
String name = fs.getName(child);
list(packageName.isEmpty() ? name : packageName + "." + name, child, kinds, true, to);
}
}
else {
String name = fs.getName(child);
FileKey key = FileKey.newName(packageName, name);
if (kinds.contains(key.getKind())) {
to.add(getReadable(key));
}
}
}
}
}