Java tutorial
/******************************************************************************* * MontiCore Language Workbench * Copyright (c) 2015, 2016, MontiCore, All rights reserved. * * This project is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 3.0 of the License, or (at your option) any later version. * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this project. If not, see <http://www.gnu.org/licenses/>. *******************************************************************************/ package de.se_rwth.langeditor.modelpath; import java.io.File; import java.util.Arrays; import java.util.Optional; import java.util.stream.Collectors; import org.eclipse.jdt.core.IClasspathAttribute; import org.eclipse.jdt.core.IClasspathContainer; import org.eclipse.jdt.core.IClasspathEntry; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.ui.wizards.IClasspathContainerPage; import org.eclipse.jdt.ui.wizards.IClasspathContainerPageExtension; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.events.MouseListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.DirectoryDialog; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import com.google.common.collect.Lists; import de.se_rwth.langeditor.global.Constants; import de.se_rwth.langeditor.injection.DIService; import de.se_rwth.langeditor.modelstates.ModelStateAssembler; import de.se_rwth.langeditor.util.Misc; /** * The framework always calls the methods of this class in the order {@link #initialize}, * {@link #setSelection}, {@link #createControl} when the wizard is launched and {@link #finish}, * then {@link #getSelection} when the wizard finishes. * * @author Sebastian Oberhoff */ public class ModelPathContainerPage extends WizardPage implements IClasspathContainerPage, IClasspathContainerPageExtension { private Table table; private IJavaProject javaProject; private IClasspathEntry[] modelPathEntries; private boolean isConfigurable; public ModelPathContainerPage() { super("Modelpath Wizard"); } @Override public void initialize(IJavaProject javaProject, IClasspathEntry[] currentEntries) { this.javaProject = javaProject; try { modelPathEntries = Optional.ofNullable(JavaCore.getClasspathContainer(Constants.MODELPATH, javaProject)) .map(IClasspathContainer::getClasspathEntries).orElse(new IClasspathEntry[] {}); } catch (JavaModelException e) { throw new RuntimeException(e); } } @Override public void setSelection(IClasspathEntry modelPathContainerEntry) { try { boolean modelPathAlreadySet = Arrays.stream(javaProject.getRawClasspath()) .anyMatch(entry -> entry.getPath().equals(Constants.MODELPATH)); boolean shouldCreateNewModelpath = modelPathContainerEntry == null; isConfigurable = !(modelPathAlreadySet && shouldCreateNewModelpath); } catch (JavaModelException e) { throw new RuntimeException(e); } } @Override public void createControl(Composite parent) { Composite composite = createComposite(parent); createButtons(composite); table = createTable(composite); setControl(composite); } @Override public boolean finish() { if (!isConfigurable) { MessageDialog.openError(null, "Modelpath already set", "A new Modelpath can't be created while another Modelpath is already configured for the same project. Please use \"Configure Build Path\" instead."); } return isConfigurable; } @Override public IClasspathEntry getSelection() { IClasspathAttribute[] modelPathEntries = convertEntriesToAttributes(); IClasspathEntry modelPathContainerEntry = JavaCore.newContainerEntry(Constants.MODELPATH, null, modelPathEntries, false); updateClasspath(modelPathContainerEntry); DIService.getInstance(ModelStateAssembler.class).scheduleFullRebuild(); return modelPathContainerEntry; } private IClasspathAttribute[] convertEntriesToAttributes() { TableItem[] items = table.getItems(); return Arrays.stream(items).map(TableItem::getText) .map(itemText -> JavaCore .newClasspathAttribute(Constants.MODELPATH_ENTRY + File.separator + itemText, itemText)) .collect(Collectors.toList()).toArray(new IClasspathAttribute[items.length]); } private void updateClasspath(IClasspathEntry newModelPathContainerEntry) { boolean classpathModified = Misc.removeFromClasspath(javaProject, entry -> entry.getPath().equals(Constants.MODELPATH)); if (classpathModified) { Misc.addToClasspath(javaProject, Lists.newArrayList(newModelPathContainerEntry)); } } private Composite createComposite(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(1, false); composite.setLayout(layout); return composite; } private void createButtons(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); RowLayout layout = new RowLayout(SWT.HORIZONTAL); composite.setLayout(layout); createNewFileEntryButton(composite); createNewDirectoryEntryButton(composite); createRemoveEntryButton(composite); } private void createNewFileEntryButton(Composite parent) { Button newEntryButton = new Button(parent, SWT.NONE); newEntryButton.setText("Add file entry"); newEntryButton.addMouseListener(new MouseListener() { @Override public void mouseDoubleClick(MouseEvent e) { // no op } @Override public void mouseDown(MouseEvent e) { // no op } @Override public void mouseUp(MouseEvent e) { FileDialog dialog = new FileDialog(parent.getShell(), parent.getStyle()); String selection = dialog.open(); createTableItem(table, selection); table.getColumn(0).pack(); } }); } private void createNewDirectoryEntryButton(Composite parent) { Button newEntryButton = new Button(parent, SWT.NONE); newEntryButton.setText("Add directory entry"); newEntryButton.addMouseListener(new MouseListener() { @Override public void mouseDoubleClick(MouseEvent e) { // no op } @Override public void mouseDown(MouseEvent e) { // no op } @Override public void mouseUp(MouseEvent e) { DirectoryDialog dialog = new DirectoryDialog(parent.getShell(), parent.getStyle()); String selection = dialog.open(); createTableItem(table, selection); table.getColumn(0).pack(); } }); } private void createRemoveEntryButton(Composite parent) { Button removeEntryButton = new Button(parent, SWT.NONE); removeEntryButton.setText("Remove entry"); removeEntryButton.addMouseListener(new MouseListener() { @Override public void mouseDoubleClick(MouseEvent e) { // no op } @Override public void mouseDown(MouseEvent e) { // no op } @Override public void mouseUp(MouseEvent e) { for (int selectionIndex : table.getSelectionIndices()) { table.remove(selectionIndex); } } }); } private Table createTable(Composite parent) { Table table = new Table(parent, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION); table.setHeaderVisible(true); GridData data = new GridData(SWT.FILL, SWT.FILL, true, true); table.setLayoutData(data); TableColumn column = new TableColumn(table, SWT.NONE); column.setText("Modelpath entries"); for (IClasspathEntry classpathEntry : modelPathEntries) { createTableItem(table, classpathEntry.getPath().toOSString()); } column.pack(); return table; } private void createTableItem(Table parent, String itemText) { TableItem tableItem = new TableItem(parent, SWT.NONE); tableItem.setText(itemText); Misc.loadImage("icons/jar_l_obj.gif").ifPresent(tableItem::setImage); } }