Java tutorial
/******************************************************************************* * Copyright (c) 2012 Pivotal Software, 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 * https://www.eclipse.org/legal/epl-v10.html * * Contributors: * Pivotal Software, Inc. - initial API and implementation *******************************************************************************/ package com.vmware.vfabric.ide.eclipse.tcserver.internal.ui; import java.io.File; import java.util.ArrayList; import java.util.Collections; import java.util.List; import org.eclipse.core.runtime.IPath; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import com.vmware.vfabric.ide.eclipse.tcserver.internal.core.TcServer; import com.vmware.vfabric.ide.eclipse.tcserver.internal.ui.TcServerInstanceConfiguratorPage.InstanceConfiguration.Layout; /** * @author Steffen Pingel * @author Christian Dupuis */ public class TcServerInstanceConfiguratorPage extends WizardPage { public static final String SELECT_TEMPLATES = "Select one or more templates."; public static final String INSTANCE_EXISTS = "An instance with that name already exists."; public static final String ENTER_NAME = "Enter a name for the instance."; public static final String ILLEGAL_SERVER_NAME = "The name must consist only of alphanumeric characters, dash, and underscore and cannot start with an underscore."; public static class InstanceConfiguration { public enum Layout { SEPARATE, COMBINED }; private List<String> templates; private Layout layout; private String name; public List<String> getTemplates() { return Collections.unmodifiableList(templates); } public Layout getLayout() { return layout; } public String getName() { return name; } } private CheckboxTableViewer templateViewer; protected List<String> templates = Collections.emptyList(); private Button separateLayoutButton; private Button combinedLayoutButton; private final TcServer tcServer; private Text nameText; protected TcServerInstanceConfiguratorPage(TcServer tcServer) { super("CreateInstance"); this.tcServer = tcServer; setTitle("Create tc Server Instance"); setDescription("Specify instance parameters."); setImageDescriptor(TcServerImages.WIZB_SERVER); } public void createControl(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayout(new GridLayout(2, false)); Label label = new Label(composite, SWT.NONE); label.setText("Name:"); nameText = new Text(composite, SWT.BORDER); GridDataFactory.fillDefaults().grab(true, false).applyTo(nameText); nameText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { validate(); } }); label = new Label(composite, SWT.NONE); GridDataFactory.fillDefaults().span(2, 1).applyTo(label); label.setText("Templates:"); templateViewer = CheckboxTableViewer.newCheckList(composite, SWT.BORDER); GridDataFactory.fillDefaults().span(2, 1).grab(true, true).applyTo(templateViewer.getControl()); templateViewer.setContentProvider(new IStructuredContentProvider() { public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { // ignore } public void dispose() { // ignore } public Object[] getElements(Object inputElement) { return templates.toArray(); } }); templateViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { validate(); } }); Group layoutGroup = new Group(composite, SWT.BORDER); GridDataFactory.fillDefaults().span(2, 1).grab(true, false).applyTo(layoutGroup); layoutGroup.setLayout(new GridLayout(1, false)); layoutGroup.setText("Layout"); separateLayoutButton = new Button(layoutGroup, SWT.RADIO); separateLayoutButton.setText("Separate"); combinedLayoutButton = new Button(layoutGroup, SWT.RADIO); combinedLayoutButton.setText("Combined"); initialize(); validate(); Dialog.applyDialogFont(composite); setControl(composite); } protected void validate() { if (nameText.getText().trim().length() == 0) { setMessage(ENTER_NAME); } else if (instanceExists()) { setMessage(INSTANCE_EXISTS, IMessageProvider.ERROR); } else if (templateViewer.getCheckedElements().length == 0) { setMessage(SELECT_TEMPLATES); } else { setMessage(null); } setPageComplete(getMessage() == null); } private boolean instanceExists() { IPath path = tcServer.getServer().getRuntime().getLocation().append(nameText.getText()); return path.toFile().exists(); } public InstanceConfiguration getModel() { InstanceConfiguration model = new InstanceConfiguration(); model.name = nameText.getText(); model.templates = new ArrayList<String>(); for (Object element : templateViewer.getCheckedElements()) { model.templates.add((String) element); } model.layout = (separateLayoutButton.getSelection()) ? Layout.SEPARATE : Layout.COMBINED; return model; } private void initialize() { separateLayoutButton.setSelection(true); IPath runtimePath = tcServer.getServer().getRuntime().getLocation(); IPath templatePath = runtimePath.append("templates"); if (templatePath.toFile().exists()) { File[] children = templatePath.toFile().listFiles(); if (children != null) { templates = new ArrayList<String>(children.length); for (File child : children) { if (child.isDirectory()) { templates.add(child.getName()); } } } } templateViewer.setInput(templates); } }