Java tutorial
/******************************************************************************* * Copyright (c) 2012 VMware, 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: * VMware, Inc. - initial API and implementation *******************************************************************************/ package org.springframework.ide.eclipse.config.ui.wizards; import java.util.ArrayList; import org.eclipse.core.resources.IFolder; import org.eclipse.core.resources.IProject; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.Status; import org.eclipse.jdt.core.IClassFile; import org.eclipse.jdt.core.ICompilationUnit; 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.IType; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.ui.wizards.NewClassWizardPage; import org.springframework.ide.eclipse.config.ui.ConfigUiPlugin; import org.springsource.ide.eclipse.commons.core.StatusHandler; // Copied from PDE's JavaAttributeWizardPage public class ExtendedNewClassWizardPage extends NewClassWizardPage { class InitialClassProperties { // populate new wizard page IType superClassType; String superClassName; IType interfaceType; String interfaceName; String className; String classArgs; String packageName; IPackageFragmentRoot packageFragmentRoot; IPackageFragment packageFragment; public InitialClassProperties() { this.superClassType = null; this.superClassName = ""; //$NON-NLS-1$ this.interfaceName = null; this.interfaceType = null; this.className = null; this.classArgs = null; this.packageName = null; this.packageFragment = null; this.packageFragmentRoot = null; } } private final IProject project; private IJavaProject javaProject; private String className; private final InitialClassProperties initialValues; public ExtendedNewClassWizardPage(IProject project, String className) { super(); this.className = className; this.project = project; try { if (project.hasNature(JavaCore.NATURE_ID)) { this.javaProject = JavaCore.create(project); } else { this.javaProject = null; } } catch (CoreException e) { StatusHandler.log(new Status(IStatus.ERROR, ConfigUiPlugin.PLUGIN_ID, Messages.getString("ExtendedNewClassWizardPage.ERROR_CREATING_WIZARD_PAGE"), e)); //$NON-NLS-1$ } initialValues = new InitialClassProperties(); initialValues.className = className; } private IType findTypeForName(String typeName) throws JavaModelException { if (typeName == null || typeName.length() == 0) { return null; } IType type = null; String fileName = typeName.replace('.', '/') + ".java"; //$NON-NLS-1$ IJavaElement element = javaProject.findElement(new Path(fileName)); if (element == null) { return null; } if (element instanceof IClassFile) { type = ((IClassFile) element).getType(); } else if (element instanceof ICompilationUnit) { IType[] types = ((ICompilationUnit) element).getTypes(); type = types[0]; } return type; } public void init() { initializeExpectedValues(); initializeWizardPage(); } private void initializeExpectedValues() { // source folder name, package name, class name int loc = className.indexOf(":"); //$NON-NLS-1$ if (loc != -1) { if (loc < className.length()) { initialValues.classArgs = className.substring(loc + 1, className.length()); className = className.substring(0, loc); } if (loc > 0) { initialValues.className = className.substring(0, loc); } else if (loc == 0) { initialValues.className = ""; //$NON-NLS-1$ } } loc = className.lastIndexOf('.'); if (loc != -1) { initialValues.packageName = className.substring(0, loc); initialValues.className = className.substring(loc + 1); } if (javaProject == null) { return; } try { if (initialValues.packageFragmentRoot == null) { IPackageFragmentRoot srcEntryDft = null; IPackageFragmentRoot[] roots = javaProject.getPackageFragmentRoots(); for (IPackageFragmentRoot root : roots) { if (root.getKind() == IPackageFragmentRoot.K_SOURCE) { srcEntryDft = root; break; } } if (srcEntryDft != null) { initialValues.packageFragmentRoot = srcEntryDft; } else { initialValues.packageFragmentRoot = javaProject .getPackageFragmentRoot(javaProject.getResource()); } if (initialValues.packageFragment == null && initialValues.packageFragmentRoot != null && initialValues.packageName != null && initialValues.packageName.length() > 0) { IFolder packageFolder = project.getFolder(initialValues.packageName); initialValues.packageFragment = initialValues.packageFragmentRoot .getPackageFragment(packageFolder.getProjectRelativePath().toOSString()); } } initialValues.superClassName = "java.lang.Object"; //$NON-NLS-1$ initialValues.superClassType = findTypeForName(initialValues.superClassName); } catch (JavaModelException e) { StatusHandler.log(new Status(IStatus.ERROR, ConfigUiPlugin.PLUGIN_ID, Messages.getString("ExtendedNewClassWizardPage.ERROR_INITIALIZING_WIZARD_PAGE"), e)); //$NON-NLS-1$ } } private void initializeWizardPage() { setPackageFragmentRoot(initialValues.packageFragmentRoot, true); setPackageFragment(initialValues.packageFragment, true); setEnclosingType(null, true); setEnclosingTypeSelection(false, true); setTypeName(initialValues.className, true); setSuperClass(initialValues.superClassName, true); if (initialValues.interfaceName != null) { ArrayList<String> interfaces = new ArrayList<String>(); interfaces.add(initialValues.interfaceName); setSuperInterfaces(interfaces, true); } boolean hasSuperClass = initialValues.superClassName != null && initialValues.superClassName.length() > 0; boolean hasInterface = initialValues.interfaceName != null && initialValues.interfaceName.length() > 0; setMethodStubSelection(false, hasSuperClass, hasInterface || hasSuperClass, true); } }