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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.location.FileLocation;
import com.android.sched.util.location.Location;
import com.android.sched.util.location.StandardInputLocation;
import com.android.sched.util.stream.UncloseableInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
/**
* Class representing a input stream from a file path or a standard input.
*/
public class InputStreamFile extends AbstractStreamFile {
@CheckForNull
private InputStream in;
public InputStreamFile(@Nonnull String name)
throws WrongPermissionException, NotFileException, NoSuchFileException {
this(new File(name), new FileLocation(name));
}
public InputStreamFile() {
super(new StandardInputLocation());
in = System.in;
}
public InputStreamFile(@Nonnull InputStream in, @Nonnull Location location) {
super(location);
this.in = in;
}
public InputStreamFile(@CheckForNull Directory workingDirectory, @Nonnull String string)
throws NotFileException, WrongPermissionException, NoSuchFileException {
this(getFileFromWorkingDirectory(workingDirectory, string), new FileLocation(string));
}
private InputStreamFile(@Nonnull File file, @Nonnull FileLocation location)
throws WrongPermissionException, NotFileException, NoSuchFileException {
super(file, location, null /* hooks */);
try {
performChecks(Existence.MUST_EXIST, Permission.READ, ChangePermission.NOCHANGE);
} catch (FileAlreadyExistsException e) {
throw new AssertionError(e);
} catch (CannotCreateFileException e) {
throw new AssertionError(e);
} catch (CannotSetPermissionException e) {
throw new AssertionError(e);
}
}
@Nonnull
public InputStream getInputStream() {
if (in != null) {
return new UncloseableInputStream(in);
} else {
clearRemover();
try {
return new FileInputStream(file);
} catch (FileNotFoundException e) {
throw new ConcurrentIOException(e);
}
}
}
}
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