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/*
 * Copyright 2013-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.util;

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


/**
 * Utilities for IO operations.
 */
public enum IOUtils {
    ;
    private static final int BUFFER_SIZE = 1024 * 4;

    /**
     * Reads and returns the rest of the given input stream as a byte array,
     * closing the input stream afterwards.
     */
    public static byte[] toByteArray(InputStream is) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        try {
            byte[] b = new byte[BUFFER_SIZE];
            int n = 0;
            while ((n = is.read(b)) != -1) {
                output.write(b, 0, n);
            }
            return output.toByteArray();
        } finally {
            output.close();
        }
    }

    /**
     * Reads and returns the rest of the given input stream as a string,
     * closing the input stream afterwards.
     */
    public static String toString(InputStream is) throws IOException {
        return new String(toByteArray(is), StringUtils.UTF8);
    }
}