org.jclouds.io.ByteStreams2.java Source code

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Here is the source code for org.jclouds.io.ByteStreams2.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.jclouds.io;

import static com.google.common.base.Preconditions.checkNotNull;
import static org.jclouds.util.Closeables2.closeQuietly;

import java.io.IOException;
import java.io.InputStream;

import com.google.common.annotations.Beta;
import com.google.common.hash.HashCode;
import com.google.common.hash.HashFunction;
import com.google.common.hash.HashingInputStream;
import com.google.common.io.ByteStreams;

@Beta
public class ByteStreams2 {
    public static HashCode hashAndClose(InputStream input, HashFunction hashFunction) throws IOException {
        checkNotNull(input, "input");
        checkNotNull(hashFunction, "hashFunction");
        try {
            HashingInputStream his = new HashingInputStream(hashFunction, input);
            ByteStreams.copy(his, ByteStreams.nullOutputStream());
            return his.hash();
        } finally {
            closeQuietly(input);
        }
    }

    public static byte[] toByteArrayAndClose(InputStream input) throws IOException {
        checkNotNull(input, "input");
        try {
            return ByteStreams.toByteArray(input);
        } finally {
            closeQuietly(input);
        }
    }
}