Java tutorial
/******************************************************************************* * Copyright (c) 2010-2012, Zoltan Ujhelyi, Tamas Szabo, Istvan Rath and Daniel Varro * 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: * Zoltan Ujhelyi, Tamas Szabo - initial API and implementation *******************************************************************************/ package org.eclipse.viatra.query.tooling.ui.wizards; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.Status; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IPackageFragment; import org.eclipse.jdt.core.IPackageFragmentRoot; import org.eclipse.jdt.core.JavaConventions; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.internal.corext.util.JavaConventionsUtil; import org.eclipse.jdt.internal.ui.dialogs.StatusInfo; import org.eclipse.jdt.ui.wizards.NewTypeWizardPage; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.viatra.query.tooling.ui.ViatraQueryGUIPlugin; /** * First page of the {@link NewVqlFileWizard} which allows to specify the details of the container for a pattern. * * @author Tamas Szabo * */ @SuppressWarnings("restriction") public class NewVqlFileWizardContainerConfigurationPage extends NewTypeWizardPage { private Text fileText; private static final String TITLE = "VIATRA Query Definition Wizard"; private static final String THE_GIVEN_FILE_ALREADY_EXISTS = "The given file already exists!"; private static final String defaultEiqFileName = ""; private static final String SOURCE_FOLDER_ERROR = "You must specify a valid source folder!"; private static final String FILE_NAME_ERROR = "File name must be specified!"; private static final String FILE_NAME_NOT_VALID = "File name must be valid!"; private static final String FILE_EXTENSION_ERROR = "File extension must be \"vql\"!"; private static final String DEFAULT_PACKAGE_ERROR = "A non-empty Java package must be specified!"; private static final String PACKAGE_NAME_WARNING = "Only lower case Java package names supported."; public NewVqlFileWizardContainerConfigurationPage() { super(false, "vql"); setTitle(TITLE); } /** * Initialization based on the current selection. * * @param selection * the current selection in the workspace */ public void init(IStructuredSelection selection) { IJavaElement jElement = getInitialJavaElement(selection); initContainerPage(jElement); if (jElement != null) { IPackageFragment pack = (IPackageFragment) jElement.getAncestor(IJavaElement.PACKAGE_FRAGMENT); setPackageFragment(pack, true); } packageChanged(); } @Override public void createControl(Composite parent) { initializeDialogUnits(parent); Composite composite = new Composite(parent, SWT.NONE); composite.setFont(parent.getFont()); int nColumns = 4; GridLayout layout = new GridLayout(); layout.numColumns = nColumns; composite.setLayout(layout); createContainerControls(composite, nColumns); createPackageControls(composite, nColumns); Label label = new Label(composite, SWT.NULL); label.setText("&File name:"); fileText = new Text(composite, SWT.BORDER | SWT.SINGLE); fileText.setText(defaultEiqFileName); GridData gd_1 = new GridData(GridData.FILL_HORIZONTAL); gd_1.horizontalSpan = 3; fileText.setLayoutData(gd_1); fileText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { validatePage(); } }); setControl(composite); validatePage(); } @Override protected void handleFieldChanged(String fieldName) { super.handleFieldChanged(fieldName); validatePage(); } /** * Used to validate the page. * * Note that because of policy restrictions, a wizard must not come up with an error. * */ private void validatePage() { IStatus packageStatus = validatePackageName(getPackageText()); StatusInfo si = new StatusInfo(packageStatus.getSeverity(), packageStatus.getMessage()); String containerPath = getPackageFragmentRootText(); IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); IResource containerResource = root.findMember(new Path(containerPath)); if (containerPath.matches("") || containerResource == null) { si.setError(SOURCE_FOLDER_ERROR); } if (fileText != null) { String fileName = fileText.getText(); String packageName = getPackageText().replaceAll("\\.", "/"); if (root.findMember(new Path(containerPath + "/" + packageName + "/" + fileText.getText())) != null) { si.setError(THE_GIVEN_FILE_ALREADY_EXISTS); } if (fileName.length() == 0) { si.setError(FILE_NAME_ERROR); } if (fileName.replace('\\', '/').indexOf('/', 1) > 0) { si.setError(FILE_NAME_NOT_VALID); } boolean wrongExtension = false; if (!fileName.contains(".")) { wrongExtension = true; } else { int dotLoc = fileName.lastIndexOf('.'); String ext = fileName.substring(dotLoc + 1); wrongExtension = !ext.equalsIgnoreCase("vql"); String name = fileName.substring(0, dotLoc); IStatus nameValidatorStatus = JavaConventions.validateTypeVariableName(name, JavaCore.VERSION_1_7, JavaCore.VERSION_1_7); if (nameValidatorStatus.getSeverity() == IStatus.ERROR) { si.setError(String.format("Filename %s is not a valid Java type name.", name)); } } if (wrongExtension) { si.setError(FILE_EXTENSION_ERROR); } } if (si.getSeverity() == IStatus.OK) { si.setInfo(""); } if (si.isError()) { setErrorMessage(si.getMessage()); } updateStatus(si); } private IStatus validatePackageName(String text) { if (text == null || text.isEmpty()) { return new Status(IStatus.ERROR, ViatraQueryGUIPlugin.PLUGIN_ID, DEFAULT_PACKAGE_ERROR); } IJavaProject project = getJavaProject(); if (project == null || !project.exists()) { return JavaConventions.validatePackageName(text, JavaCore.VERSION_1_7, JavaCore.VERSION_1_7); } IStatus status = JavaConventionsUtil.validatePackageName(text, project); if (!text.equalsIgnoreCase(text.toLowerCase())) { return new Status(IStatus.ERROR, ViatraQueryGUIPlugin.PLUGIN_ID, PACKAGE_NAME_WARNING); } return status; } /** * Returns the name of the new eiq file set in the wizard. * * @return the name of the file */ public String getFileName() { return fileText.getText(); } /** * Returns the name of the container set in the wizard. * * @return the name of the container (folder) */ public String getContainerName() { return getPackageFragmentRootText(); } /** * Returns the name of the package set in the wizard. * * @return the name of the package */ public String getPackageName() { IPackageFragmentRoot root = getPackageFragmentRoot(); IPackageFragment fragment = root.getPackageFragment(getPackageText()); if (!fragment.exists()) { try { root.createPackageFragment(getPackageText(), true, new NullProgressMonitor()); } catch (JavaModelException e) { ViatraQueryGUIPlugin.getDefault().logException("Cannot load packages " + e.getMessage(), e); } } return getPackageText(); } public IProject getProject() { return this.getPackageFragmentRoot().getJavaProject().getProject(); } }