it.sephiroth.android.library.exif2.io.IOUtils.java Source code

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Here is the source code for it.sephiroth.android.library.exif2.io.IOUtils.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 it.sephiroth.android.library.exif2.io;

import java.io.*;

/**
 * extract from org.apache.commons.io only related functions as the library is too large.
 */
public class IOUtils {

    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
    private static final int EOF = -1;

    public static int copy(final InputStream input, final OutputStream output) throws IOException {
        final long count = copyLarge(input, output);
        if (count > Integer.MAX_VALUE) {
            return -1;
        }
        return (int) count;
    }

    public static long copy(final InputStream input, final OutputStream output, final int bufferSize)
            throws IOException {
        return copyLarge(input, output, new byte[bufferSize]);
    }

    public static long copyLarge(final InputStream input, final OutputStream output, final byte[] buffer)
            throws IOException {
        long count = 0;
        int n = 0;
        while (EOF != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }

    public static long copyLarge(final InputStream input, final OutputStream output) throws IOException {
        return copy(input, output, DEFAULT_BUFFER_SIZE);
    }

    public static void closeQuietly(final InputStream input) {
        closeQuietly((Closeable) input);
    }

    public static void closeQuietly(final OutputStream output) {
        closeQuietly((Closeable) output);
    }

    public static void closeQuietly(final Closeable closeable) {
        try {
            if (closeable != null) {
                closeable.close();
            }
        } catch (final IOException ioe) {
            // ignore
        }
    }
}