| /* |
| * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.servicetag; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.InvocationTargetException; |
| import java.io.IOException; |
| import java.net.URI; |
| |
| /** |
| * BrowserSupport class. |
| * |
| * The implementation of the com.sun.servicetag API needs to be |
| * compiled with JDK 5 as well since the consumer of this API |
| * may require to support JDK 5 (e.g. NetBeans). |
| * |
| * The Desktop.browse() method can be backported in this class |
| * if needed. The current implementation only supports JDK 6. |
| */ |
| class BrowserSupport { |
| private static boolean isBrowseSupported = false; |
| private static Method browseMethod = null; |
| private static Object desktop = null; |
| private static volatile Boolean result = false; |
| |
| |
| private static void initX() { |
| if (desktop != null) { |
| return; |
| } |
| boolean supported = false; |
| Method browseM = null; |
| Object desktopObj = null; |
| try { |
| // Determine if java.awt.Desktop is supported |
| Class<?> desktopCls = Class.forName("java.awt.Desktop", true, null); |
| Method getDesktopM = desktopCls.getMethod("getDesktop"); |
| browseM = desktopCls.getMethod("browse", URI.class); |
| |
| Class<?> actionCls = Class.forName("java.awt.Desktop$Action", true, null); |
| final Method isDesktopSupportedMethod = desktopCls.getMethod("isDesktopSupported"); |
| Method isSupportedMethod = desktopCls.getMethod("isSupported", actionCls); |
| Field browseField = actionCls.getField("BROWSE"); |
| // isDesktopSupported calls getDefaultToolkit which can block |
| // infinitely, see 6636099 for details, to workaround we call |
| // in a thread and time it out, noting that the issue is specific |
| // to X11, it does not hurt for Windows. |
| Thread xthread = new Thread() { |
| public void run() { |
| try { |
| // support only if Desktop.isDesktopSupported() and |
| // Desktop.isSupported(Desktop.Action.BROWSE) return true. |
| result = (Boolean) isDesktopSupportedMethod.invoke(null); |
| } catch (IllegalAccessException e) { |
| // should never reach here |
| InternalError x = |
| new InternalError("Desktop.getDesktop() method not found"); |
| x.initCause(e); |
| } catch (InvocationTargetException e) { |
| // browser not supported |
| if (Util.isVerbose()) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| }; |
| // set it to daemon, so that the vm will exit. |
| xthread.setDaemon(true); |
| xthread.start(); |
| try { |
| xthread.join(5 * 1000); |
| } catch (InterruptedException ie) { |
| // ignore the exception |
| } |
| if (result.booleanValue()) { |
| desktopObj = getDesktopM.invoke(null); |
| result = (Boolean) isSupportedMethod.invoke(desktopObj, browseField.get(null)); |
| supported = result.booleanValue(); |
| } |
| } catch (ClassNotFoundException e) { |
| // browser not supported |
| if (Util.isVerbose()) { |
| e.printStackTrace(); |
| } |
| } catch (NoSuchMethodException e) { |
| // browser not supported |
| if (Util.isVerbose()) { |
| e.printStackTrace(); |
| } |
| } catch (NoSuchFieldException e) { |
| // browser not supported |
| if (Util.isVerbose()) { |
| e.printStackTrace(); |
| } |
| } catch (IllegalAccessException e) { |
| // should never reach here |
| InternalError x = |
| new InternalError("Desktop.getDesktop() method not found"); |
| x.initCause(e); |
| throw x; |
| } catch (InvocationTargetException e) { |
| // browser not supported |
| if (Util.isVerbose()) { |
| e.printStackTrace(); |
| } |
| } |
| isBrowseSupported = supported; |
| browseMethod = browseM; |
| desktop = desktopObj; |
| } |
| |
| static boolean isSupported() { |
| initX(); |
| return isBrowseSupported; |
| } |
| |
| /** |
| * Launches the default browser to display a {@code URI}. |
| * If the default browser is not able to handle the specified |
| * {@code URI}, the application registered for handling |
| * {@code URIs} of the specified type is invoked. The application |
| * is determined from the protocol and path of the {@code URI}, as |
| * defined by the {@code URI} class. |
| * <p> |
| * This method calls the Desktop.getDesktop().browse() method. |
| * <p> |
| * @param uri the URI to be displayed in the user default browser |
| * |
| * @throws NullPointerException if {@code uri} is {@code null} |
| * @throws UnsupportedOperationException if the current platform |
| * does not support the {@link Desktop.Action#BROWSE} action |
| * @throws IOException if the user default browser is not found, |
| * or it fails to be launched, or the default handler application |
| * failed to be launched |
| * @throws IllegalArgumentException if the necessary permissions |
| * are not available and the URI can not be converted to a {@code URL} |
| */ |
| static void browse(URI uri) throws IOException { |
| if (uri == null) { |
| throw new NullPointerException("null uri"); |
| } |
| if (!isSupported()) { |
| throw new UnsupportedOperationException("Browse operation is not supported"); |
| } |
| |
| // Call Desktop.browse() method |
| try { |
| if (Util.isVerbose()) { |
| System.out.println("desktop: " + desktop + ":browsing..." + uri); |
| } |
| browseMethod.invoke(desktop, uri); |
| } catch (IllegalAccessException e) { |
| // should never reach here |
| InternalError x = |
| new InternalError("Desktop.getDesktop() method not found"); |
| x.initCause(e); |
| throw x; |
| } catch (InvocationTargetException e) { |
| Throwable x = e.getCause(); |
| if (x != null) { |
| if (x instanceof UnsupportedOperationException) { |
| throw (UnsupportedOperationException) x; |
| } else if (x instanceof IllegalArgumentException) { |
| throw (IllegalArgumentException) x; |
| } else if (x instanceof IOException) { |
| throw (IOException) x; |
| } else if (x instanceof SecurityException) { |
| throw (SecurityException) x; |
| } else { |
| // ignore |
| } |
| } |
| } |
| } |
| } |
