net.sf.keystore_explorer.utilities.io.CopyUtil.java Source code

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Here is the source code for net.sf.keystore_explorer.utilities.io.CopyUtil.java

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/*
 * Copyright 2004 - 2013 Wayne Grant
 *           2013 - 2016 Kai Kramer
 *
 * This file is part of KeyStore Explorer.
 *
 * KeyStore Explorer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KeyStore Explorer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KeyStore Explorer.  If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.keystore_explorer.utilities.io;

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

import org.apache.commons.io.IOUtils;

/**
 * Class of utility methods to copy data between I/O streams.
 *
 */
public class CopyUtil {
    private CopyUtil() {
    }

    /**
     * Copy data from one stream to another and do not close I/O.
     *
     * @param in
     *            Input stream
     * @param out
     *            Output stream
     * @throws IOException
     *             If an I/O problem occurred
     */
    public static void copy(InputStream in, OutputStream out) throws IOException {
        byte[] buffer = new byte[2048];
        int i;
        while ((i = in.read(buffer)) > 0) {
            out.write(buffer, 0, i);
        }
    }

    /**
     * Copy data from one stream to another and close I/O.
     *
     * @param in
     *            Input stream
     * @param out
     *            Output stream
     * @throws IOException
     *             If an I/O problem occurred
     */
    public static void copyClose(InputStream in, OutputStream out) throws IOException {
        try {
            copy(in, out);
        } finally {
            IOUtils.closeQuietly(in);
            IOUtils.closeQuietly(out);
        }
    }

    /**
     * Copy data from a reader to a writer and do not close I/O.
     *
     * @param reader
     *            Reader
     * @param writer
     *            Writer
     * @throws IOException
     *             If an I/O problem occurred
     */
    public static void copy(Reader reader, Writer writer) throws IOException {
        char[] buffer = new char[2048];
        int i;
        while ((i = reader.read(buffer)) > 0) {
            writer.write(buffer, 0, i);
        }
    }

    /**
     * Copy data from a reader to a writer and close I/O.
     *
     * @param reader
     *            Reader
     * @param writer
     *            Writer
     * @throws IOException
     *             If an I/O problem occurred
     */
    public static void copyClose(Reader reader, Writer writer) throws IOException {
        try {
            copy(reader, writer);
        } finally {
            IOUtils.closeQuietly(reader);
            IOUtils.closeQuietly(writer);
        }
    }
}