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Classes, interfaces and enums that assist with everyday Java development tasks.

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/*
 * Copyright 2010-2012 Craig S. Dickson (http://craigsdickson.com)
 *
 * 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.squeakysand.commons.io;

import com.squeakysand.commons.lang.NullParameterException;

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

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Craig S. Dickson
 */
public class StreamHelper {

    private static final Logger LOG = LoggerFactory.getLogger(StreamHelper.class);

    public static void copyInputStreamToOutputStream(InputStream inputStream, OutputStream outputStream) throws IOException {
        if (inputStream == null) {
            throw new NullParameterException("inputStream");
        }
        if (outputStream == null) {
            throw new NullParameterException("outputStream");
        }
        try {
            byte[] buf = new byte[1024];
            int count = 0;
            while ((count = inputStream.read(buf)) >= 0) {
                outputStream.write(buf, 0, count);
            }
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    LOG.warn("unable to close input stream");
                }
            }
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    LOG.warn("unable to close output stream");
                }
            }
        }
    }

}