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/*
* Copyright (C) 2013 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.util.file;
import com.android.sched.util.ConcurrentIOException;
import com.android.sched.util.RunnableHooks;
import com.android.sched.util.stream.UncloseableOutputStream;
import com.android.sched.util.stream.UncloseablePrintStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
/**
* Class representing a output stream from a file path or a standard output.
*/
public class OutputStreamFile extends AbstractStreamFile {
private final boolean append;
public OutputStreamFile(@Nonnull String name,
@CheckForNull RunnableHooks hooks,
@Nonnull Existence existence,
@Nonnull ChangePermission change,
boolean append)
throws FileAlreadyExistsException,
CannotCreateFileException,
CannotSetPermissionException,
WrongPermissionException,
NoSuchFileException,
NotFileOrDirectoryException {
super(name, hooks);
performChecks(existence, Permission.WRITE, change);
this.append = append;
}
/**
* Creates a new instance of {@link OutputStreamFile} assuming the file may exist or not, without
* modifying its permissions. If the file already exists it will be overwritten.
*/
public OutputStreamFile(@Nonnull String name,
@CheckForNull RunnableHooks hooks)
throws CannotCreateFileException,
WrongPermissionException,
NotFileOrDirectoryException {
super(name, hooks);
try {
performChecks(Existence.MAY_EXIST, Permission.WRITE, ChangePermission.NOCHANGE);
} catch (NoSuchFileException e) {
throw new AssertionError(e);
} catch (FileAlreadyExistsException e) {
throw new AssertionError(e);
} catch (CannotSetPermissionException e) {
throw new AssertionError(e);
}
this.append = false;
}
public OutputStreamFile() {
super(Permission.WRITE);
this.append = true;
}
@Nonnull
public OutputStream getOutputStream() {
if (file == null) {
return new UncloseableOutputStream(System.out);
} else {
clearRemover();
try {
return new FileOutputStream(file, append);
} catch (FileNotFoundException e) {
throw new ConcurrentIOException(e);
}
}
}
@Nonnull
public PrintStream getPrintStream() {
if (file == null) {
return new UncloseablePrintStream(System.out);
} else {
clearRemover();
try {
return new PrintStream(file);
} catch (FileNotFoundException e) {
throw new ConcurrentIOException(e);
}
}
}
}
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