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/*
* Copyright (C) 2012 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.jack.test.util;
import com.google.common.io.NullOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.annotation.Nonnull;
/**
* Class that continuously read an {@link InputStream} and optionally could write the input in a
* {@link OutputStream}.
*/
public class BytesStreamSucker {
private static final int BUFFER_SIZE = 4096;
@Nonnull
private final byte[] buffer = new byte[BUFFER_SIZE];
@Nonnull
private final InputStream is;
@Nonnull
private final OutputStream os;
private final boolean toBeClose;
public BytesStreamSucker(
@Nonnull InputStream is, @Nonnull OutputStream os, boolean toBeClose) {
this.is = is;
this.os = os;
this.toBeClose = toBeClose;
}
public BytesStreamSucker(@Nonnull InputStream is, @Nonnull OutputStream os) {
this(is, os, false);
}
public BytesStreamSucker(@Nonnull InputStream is) {
this(is, new NullOutputStream(), false);
}
public void suck() throws IOException {
try {
int bytesRead;
while ((bytesRead = is.read(buffer)) >= 0) {
os.write(buffer, 0, bytesRead);
os.flush();
}
} finally {
if (toBeClose) {
os.close();
}
}
}
}
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