org.pwsafe.passwordsafeswt.util.IOUtils.java Source code

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Here is the source code for org.pwsafe.passwordsafeswt.util.IOUtils.java

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/*
 * Copyright (c) 2008-2014 David Muller <roxon@users.sourceforge.net>.
 * All rights reserved. Use of the code is allowed under the
 * Artistic License 2.0 terms, as specified in the LICENSE file
 * distributed with this code, or available from
 * http://www.opensource.org/licenses/artistic-license-2.0.php
 */
// Created on 22.06.2007
package org.pwsafe.passwordsafeswt.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.net.URI;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.program.Program;

/**
 * @author shamilbi
 */
public class IOUtils {

    private static final Log LOG = LogFactory.getLog(IOUtils.class);

    public static void closeQuietly(InputStream in) {
        if (in == null) {
            return;
        }

        try {
            in.close();
        } catch (IOException e) {
            LOG.warn("InputStream.close() error", e);
        }
    }

    public static void close(OutputStream out) throws IOException {
        if (out == null) {
            return;
        }
        out.close();
    }

    public static void closeQuietly(OutputStream out) {
        try {
            close(out);
        } catch (IOException e) {
            LOG.warn("OutputStream.close() error", e);
        }
    }

    /**
     * Use swt to open a browser. If this does not work, and Java 6 is
     * available, try to open a browser using java.awt.Desktop class.
     * 
     * @param anUrl
     */
    public static void openBrowser(String anUrl) {
        if (anUrl == null) {
            return;
        }
        if (!anUrl.contains("://")) {
            anUrl = "http://" + anUrl;
        }
        try {
            final boolean success = Program.launch(anUrl);
            if (!success) {
                LOG.warn("failed to launch a web browser for URL " + anUrl);
            }
            if (success)
                return;
        } catch (Exception ioe) {
            LOG.error("failed to launch a web browser for URL " + anUrl, ioe);
        }

        try {
            Class desktopClass = Class.forName("java.awt.Desktop"); //$NON-NLS-1$
            Method getDesktop = desktopClass.getMethod("getDesktop", null); //$NON-NLS-1$
            Object desktopObj = getDesktop.invoke(desktopClass, null);
            Method browseMethod = desktopClass.getMethod("browse", URI.class); //$NON-NLS-1$
            browseMethod.invoke(desktopObj, new URI(anUrl));
        } catch (Exception anEx) {
            LOG.warn("Can't open " + anUrl + ", because of Exception " + anEx); //$NON-NLS-1$ //$NON-NLS-2$
        }

    }

    private IOUtils() {
        // only static methods
    }

    /**
     * Returns an image stored in the classpath at the specified path
     * 
     * @param clazz Class The class relative to which to find the image
     * @param path String The path to the image file
     * @return Image The image stored in the file at the specified path
     */
    public static Image getImage(Class<?> clazz, String path) {
        String key = clazz.getName() + '|' + path;
        final ImageRegistry imageRegistry = JFaceResources.getImageRegistry();
        Image image = imageRegistry.get(key);
        if (image == null) {
            imageRegistry.put(key, ImageDescriptor.createFromFile(clazz, path));
            image = imageRegistry.get(key);
        }
        return image;
    }

}