com.varaneckas.hawkscope.util.IOUtils.java Source code

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Here is the source code for com.varaneckas.hawkscope.util.IOUtils.java

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/*
 * Copyright (c) 2008-2009 Tomas Varaneckas
 * http://www.varaneckas.com
 * 
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.varaneckas.hawkscope.util;

import java.io.Closeable;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Display;

/**
 * Input/Output Utilities
 *
 * @author Tomas Varaneckas
 * @version $Id$
 */
public abstract class IOUtils {

    /**
     * Logger
     */
    private static final Log log = LogFactory.getLog(IOUtils.class);

    /**
     * Closes a closeable without the annoying {@link IOException} or a 
     * null check
     * 
     * @param closeable
     */
    public static void closeQuietly(final Closeable closeable) {
        try {
            if (closeable != null) {
                closeable.close();
            }
        } catch (final IOException e) {
            log.warn("Failed closing: " + closeable, e);
        }
    }

    /**
     * Copies String to System Clipboard
     * 
     * @param target text to copy
     */
    public static void copyToClipboard(final String target) {
        final Clipboard clip = new Clipboard(Display.getDefault());
        clip.setContents(new Object[] { target }, new Transfer[] { TextTransfer.getInstance() });
    }

    /**
     * Copies a file
     * 
     * @param in source file
     * @param out target file
     * @return boolean on success
     */
    public static synchronized boolean copyFile(final InputStream in, final OutputStream out) {
        try {
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
            in.close();
            out.close();
            return true;
        } catch (final Exception e) {
            log.error("Failed copying file: " + in + " -> " + out, e);
            return false;
        }
    }

    public static synchronized boolean copyFile(final String in, final String out) {
        try {
            File outFile = new File(out);
            if (!outFile.exists()) {
                if (!outFile.createNewFile()) {
                    return false;
                }
            }
            return copyFile(ClassLoader.getSystemClassLoader().getResourceAsStream(in),
                    new FileOutputStream(outFile));
        } catch (final Exception e) {
            log.debug("Failed copying file: " + in + " -> " + out, e);
            return false;
        }
    }

}