Java tutorial
/******************************************************************************* * Copyright (c) 2010 Sonatype, Inc. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Sonatype, Inc. - initial API and implementation *******************************************************************************/ package org.eclipse.m2e.ui.internal.launch; import java.util.List; import org.eclipse.core.runtime.CoreException; import org.eclipse.debug.core.ILaunchConfiguration; import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy; import org.eclipse.jface.preference.PreferenceDialog; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.dialogs.PreferencesUtil; import org.eclipse.m2e.actions.MavenLaunchConstants; import org.eclipse.m2e.core.internal.MavenPluginActivator; import org.eclipse.m2e.core.internal.launch.AbstractMavenRuntime; import org.eclipse.m2e.core.internal.launch.MavenEmbeddedRuntime; import org.eclipse.m2e.core.internal.launch.MavenExternalRuntime; import org.eclipse.m2e.core.internal.launch.MavenRuntimeManagerImpl; import org.eclipse.m2e.core.internal.launch.MavenWorkspaceRuntime; /** * @since 1.4 */ @SuppressWarnings("restriction") public class MavenRuntimeSelector extends Composite { ComboViewer runtimeComboViewer; private Button configureRuntimesButton; private static MavenRuntimeManagerImpl getRuntimeManager() { return MavenPluginActivator.getDefault().getMavenRuntimeManager(); } public MavenRuntimeSelector(final Composite mainComposite) { super(mainComposite, SWT.NONE); GridLayout gridLayout = new GridLayout(2, false); gridLayout.marginWidth = 0; gridLayout.marginHeight = 0; setLayout(gridLayout); runtimeComboViewer = new ComboViewer(this, SWT.BORDER | SWT.READ_ONLY); runtimeComboViewer.getCombo().setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); runtimeComboViewer.setContentProvider(new IStructuredContentProvider() { public Object[] getElements(Object input) { return ((List<?>) input).toArray(); } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } public void dispose() { } }); runtimeComboViewer.setLabelProvider(new ILabelProvider() { public void removeListener(ILabelProviderListener listener) { } public boolean isLabelProperty(Object element, String property) { return false; } public void dispose() { } public void addListener(ILabelProviderListener listener) { } public String getText(Object element) { AbstractMavenRuntime runtime = (AbstractMavenRuntime) element; StringBuilder sb = new StringBuilder(); if (runtime.isLegacy()) { sb.append(MavenRuntimeManagerImpl.EXTERNAL).append(" ").append(runtime.toString()); } else if (!runtime.isEditable()) { sb.append(getType(runtime)).append(" (").append(runtime.toString()).append(')'); } else { sb.append(runtime.getName()).append(" ("); sb.append(getType(runtime)).append(' ').append(runtime.toString()); sb.append(')'); } return sb.toString(); } public Image getImage(Object element) { return null; } }); try { setInput(); } catch (NullPointerException e) { // ignore, this only happens inside windowbuilder } configureRuntimesButton = new Button(this, SWT.NONE); configureRuntimesButton.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false)); configureRuntimesButton.setText(org.eclipse.m2e.internal.launch.Messages.MavenLaunchMainTab_btnConfigure); configureRuntimesButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { PreferenceDialog dialog = PreferencesUtil.createPreferenceDialogOn(mainComposite.getShell(), "org.eclipse.m2e.core.preferences.MavenInstallationsPreferencePage", null, null); //$NON-NLS-1$ if (dialog.open() == Window.OK) { setInput(); } } }); } protected String getType(AbstractMavenRuntime runtime) { if (runtime instanceof MavenEmbeddedRuntime) { return MavenRuntimeManagerImpl.EMBEDDED; } else if (runtime instanceof MavenWorkspaceRuntime) { return MavenRuntimeManagerImpl.WORKSPACE; } else if (runtime instanceof MavenExternalRuntime) { return MavenRuntimeManagerImpl.EXTERNAL; } throw new IllegalArgumentException(); } protected void setInput() { MavenRuntimeManagerImpl runtimeManager = getRuntimeManager(); runtimeComboViewer.setInput(runtimeManager.getMavenRuntimes()); runtimeComboViewer .setSelection(new StructuredSelection(runtimeManager.getRuntime(MavenRuntimeManagerImpl.DEFAULT))); } public void setSelectRuntime(AbstractMavenRuntime runtime) { this.runtimeComboViewer.setSelection(new StructuredSelection(runtime)); } public AbstractMavenRuntime getSelectedRuntime() { IStructuredSelection selection = (IStructuredSelection) runtimeComboViewer.getSelection(); return (AbstractMavenRuntime) selection.getFirstElement(); } public void addSelectionChangedListener(ISelectionChangedListener listener) { runtimeComboViewer.addSelectionChangedListener(listener); } public void initializeFrom(ILaunchConfiguration configuration) { String name = ""; try { name = configuration.getAttribute(MavenLaunchConstants.ATTR_RUNTIME, ""); //$NON-NLS-1$ } catch (CoreException ex) { // TODO log } AbstractMavenRuntime runtime = getRuntimeManager().getRuntime(name); if (runtime != null) { setSelectRuntime(runtime); } } public void performApply(ILaunchConfigurationWorkingCopy configuration) { AbstractMavenRuntime runtime = getSelectedRuntime(); configuration.setAttribute(MavenLaunchConstants.ATTR_RUNTIME, runtime.getName()); } @Override public void setEnabled(boolean enabled) { super.setEnabled(enabled); runtimeComboViewer.getCombo().setEnabled(enabled); configureRuntimesButton.setEnabled(enabled); } }