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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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.android.sched.vfs.direct;
import com.android.sched.util.ConcurrentIOException;
import com.android.sched.util.file.CannotCreateFileException;
import com.android.sched.util.file.Directory;
import com.android.sched.util.file.NotFileOrDirectoryException;
import com.android.sched.util.location.DirectoryLocation;
import com.android.sched.util.location.FileLocation;
import com.android.sched.util.location.Location;
import com.android.sched.vfs.AbstractVElement;
import com.android.sched.vfs.InputOutputVDir;
import com.android.sched.vfs.InputRootVDir;
import com.android.sched.vfs.InputVElement;
import com.android.sched.vfs.InputVFile;
import com.android.sched.vfs.OutputVFile;
import com.android.sched.vfs.VPath;
import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
/**
* Directory in the file system.
*/
public class DirectDir extends AbstractVElement implements InputRootVDir, InputOutputVDir {
@Nonnull
private final File dir;
@CheckForNull
private ArrayList<InputVElement> list;
@Nonnull
private final Location location;
public DirectDir(@Nonnull Directory directory) {
dir = directory.getFile();
location = directory.getLocation();
}
public DirectDir(@Nonnull File dir) throws NotFileOrDirectoryException {
if (!dir.isDirectory()) {
throw new NotFileOrDirectoryException(new DirectoryLocation(dir));
}
this.dir = dir;
location = new FileLocation(dir);
}
@Nonnull
@Override
public String getName() {
return dir.getName();
}
@Nonnull
@Override
public synchronized Collection<? extends InputVElement> list() {
if (list == null) {
File[] subs = dir.listFiles();
if (subs == null) {
throw new ConcurrentIOException(new ListDirException(dir));
}
if (subs.length == 0) {
return Collections.emptyList();
}
list = new ArrayList<InputVElement>(subs.length);
for (File sub : subs) {
try {
if (sub.isFile()) {
list.add(new DirectFile(sub));
} else {
list.add(new DirectDir(sub));
}
} catch (NotFileOrDirectoryException e) {
throw new ConcurrentIOException(e);
}
}
}
assert list != null;
return list;
}
@Override
@Nonnull
public Location getLocation() {
return location;
}
@Override
@Nonnull
public InputVFile getInputVFile(@Nonnull VPath path) throws NotFileOrDirectoryException {
File file = new File(dir, path.getPathAsString(File.separatorChar));
if (!file.isFile()) {
throw new NotFileOrDirectoryException(new FileLocation(file));
}
return new DirectFile(file);
}
@Override
@Nonnull
public OutputVFile createOutputVFile(@Nonnull VPath path) throws CannotCreateFileException {
File file = new File(dir, path.getPathAsString(getSeparator()));
if (!file.getParentFile().mkdirs() && !file.getParentFile().isDirectory()) {
throw new CannotCreateFileException(new DirectoryLocation(file.getParentFile()));
}
return new DirectFile(file);
}
@Override
public char getSeparator() {
return File.separatorChar;
}
@Override
public boolean isVDir() {
return true;
}
}
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