Java tutorial
/** * This file Copyright (c) 2005-2008 Aptana, Inc. This program is * dual-licensed under both the Aptana Public License and the GNU General * Public license. You may elect to use one or the other of these licenses. * * This program is distributed in the hope that it will be useful, but * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or * NONINFRINGEMENT. Redistribution, except as permitted by whichever of * the GPL or APL you select, is prohibited. * * 1. For the GPL license (GPL), you can redistribute and/or modify this * program under the terms of the GNU General Public License, * Version 3, as published by the Free Software Foundation. You should * have received a copy of the GNU General Public License, Version 3 along * with this program; if not, write to the Free Software Foundation, Inc., 51 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Aptana provides a special exception to allow redistribution of this file * with certain other free and open source software ("FOSS") code and certain additional terms * pursuant to Section 7 of the GPL. You may view the exception and these * terms on the web at http://www.aptana.com/legal/gpl/. * * 2. For the Aptana Public License (APL), this program and the * accompanying materials are made available under the terms of the APL * v1.0 which accompanies this distribution, and is available at * http://www.aptana.com/legal/apl/. * * You may view the GPL, Aptana's exception and additional terms, and the * APL in the file titled license.html at the root of the corresponding * plugin containing this source file. * * Any modifications to this file must keep this entire header intact. */ package com.aptana.ide.server.ui.views.actions; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.action.Action; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.ISelectionProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import com.aptana.ide.core.IdeLog; import com.aptana.ide.core.StringUtils; import com.aptana.ide.server.core.IPausableServer; import com.aptana.ide.server.core.IServer; import com.aptana.ide.server.ui.ServerUIPlugin; import com.aptana.ide.server.ui.views.Messages; /** * @author Pavel Petrochenko */ public final class SuspendServerAction extends Action { private ISelectionProvider provider; private boolean isPaused; private IStatus lastStatus; /** * @param provider */ public SuspendServerAction(ISelectionProvider provider) { this.provider = provider; provider.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { SuspendServerAction.this.selectionChanged(event); } }); selectionChanged(new SelectionChangedEvent(provider, provider.getSelection())); } /** * @param event */ public void selectionChanged(SelectionChangedEvent event) { IStructuredSelection selection = (IStructuredSelection) event.getSelection(); if (!selection.isEmpty()) { boolean enabled2 = isEnabled(); IServer server = (IServer) selection.getFirstElement(); if (server instanceof IPausableServer) { if (server.getServerState() == IPausableServer.STATE_PAUSED) { initResumeDescriptors(server, enabled2); } else { initPauseDescriptors(server, enabled2); } } else { initPauseDescriptors(server, false); } setEnabled(enabled2); } else { initPauseDescriptors(null, false); setEnabled(false); } } private void initPauseDescriptors(IServer server, boolean enabled2) { String name = server != null ? server.getName() : ""; //$NON-NLS-1$ // this.setText(StringUtils.format(Messages.ServersView_PAUSE, name)); if (!enabled2) { if (lastStatus != null) { String message = lastStatus.getMessage(); setToolTipText(message); } else { String format = StringUtils.format(Messages.SuspendServerAction_CAN_NOT_BE_PAUSED, name); setToolTipText(format); } } else { String string = Messages.SuspendServerAction_PAUSE_SERVER; setToolTipText(string); } if (!isPaused) { this.setImageDescriptor(ServerUIPlugin.getImageDescriptor("/icons/server/elcl16/suspend_co.gif")); //$NON-NLS-1$ this.setDisabledImageDescriptor( ServerUIPlugin.getImageDescriptor("/icons/server/dlcl16/suspend_co.gif")); //$NON-NLS-1$ isPaused = true; } } /** * @see org.eclipse.jface.action.Action#isEnabled() */ public boolean isEnabled() { IStructuredSelection selection = (IStructuredSelection) provider.getSelection(); if (!selection.isEmpty()) { IServer server = (IServer) selection.getFirstElement(); this.lastStatus = null; if (server instanceof IPausableServer) { IPausableServer ps = (IPausableServer) server; if (ps.getServerState() == IPausableServer.STATE_PAUSED) { IStatus canResume = ps.canResume(); return canResume.isOK(); } IStatus canPause = ps.canPause(); return canPause.isOK(); } return false; } return false; } /** * @see org.eclipse.jface.action.Action#run() */ public void run() { IStructuredSelection selection = (IStructuredSelection) provider.getSelection(); if (!selection.isEmpty()) { IPausableServer server = (IPausableServer) selection.getFirstElement(); try { if (server.getServerState() == IPausableServer.STATE_PAUSED) { server.resume(null, null); } else { server.pause(null, null); } } catch (Exception e) { IdeLog.log(ServerUIPlugin.getDefault(), IStatus.ERROR, "exception while starting server", e); //$NON-NLS-1$ } } } private void initResumeDescriptors(IServer server, boolean enabled2) { String name = server != null ? server.getName() : ""; //$NON-NLS-1$ if (enabled2) { String format = StringUtils.format(Messages.ServersView_RESUME, name); this.setText(format); this.setToolTipText(format); } else { String format = lastStatus != null ? lastStatus.getMessage() : StringUtils.format(Messages.SuspendServerAction_RESUME_TOOLTIP, name); this.setToolTipText(format); this.setText(format); } if (isPaused) { setImageDescriptor(ServerUIPlugin.getImageDescriptor("/icons/server/elcl16/resume_co.gif")); //$NON-NLS-1$ setDisabledImageDescriptor(ServerUIPlugin.getImageDescriptor("/icons/server/dlcl16/resume_co.gif")); //$NON-NLS-1$ isPaused = false; } } }