| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.internal.debug.ui.launcher; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.expressions.PropertyTester; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.NullProgressMonitor; |
| 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.IMember; |
| import org.eclipse.jdt.core.IPackageFragment; |
| import org.eclipse.jdt.core.IPackageFragmentRoot; |
| import org.eclipse.jdt.core.IType; |
| import org.eclipse.jdt.core.JavaModelException; |
| import org.eclipse.jdt.core.Signature; |
| import org.eclipse.jdt.internal.corext.util.JavaModelUtil; |
| |
| /** |
| * ResourceExtender provides propertyTester(s) for IResource types |
| * for use in XML Expression Language syntax. |
| */ |
| public class JavaElementPropertyTester extends PropertyTester { |
| |
| private static final String PROPERTY_IS_APPLET= "isApplet"; //$NON-NLS-1$ |
| private static final String PROPERTY_HAS_MAIN_TYPE= "hasMainType"; //$NON-NLS-1$ |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jdt.internal.corext.refactoring.participants.properties.IPropertyEvaluator#test(java.lang.Object, java.lang.String, java.lang.String) |
| */ |
| public boolean test(Object receiver, String method, Object[] args, Object expectedValue) { |
| IJavaElement javaElement = null; |
| if (receiver instanceof IAdaptable) { |
| javaElement = (IJavaElement) ((IAdaptable)receiver).getAdapter(IJavaElement.class); |
| } |
| if (javaElement != null) { |
| if (!javaElement.exists()) { |
| return false; |
| } |
| } |
| if (javaElement instanceof IJavaProject || |
| javaElement instanceof IPackageFragmentRoot || |
| javaElement instanceof IPackageFragment) { |
| // optomistic |
| return true; |
| } |
| if (javaElement != null) { |
| if (PROPERTY_IS_APPLET.equals(method)) { //$NON-NLS-1$ |
| return isApplet(javaElement); |
| } else if (PROPERTY_HAS_MAIN_TYPE.equals(method)) { |
| return hasMain(javaElement); |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Check if the specified resource is an Applet. |
| * @return <code>true</code> if the target resource is an Applet, |
| * <code>false</code> otherwise. |
| */ |
| private boolean isApplet(IJavaElement element) { |
| try { |
| Set result= new HashSet(); |
| AppletLaunchConfigurationUtils.collectTypes(element, new NullProgressMonitor(), result); |
| if (result.size() > 0) { |
| return true; |
| } |
| } catch (JavaModelException e) { |
| return false; |
| } |
| return false; |
| } |
| |
| /** |
| * Look for a Java main() method in the specified resource. |
| * @return true if the target resource has a <code>main</code> method, |
| * <code>false</code> otherwise. |
| */ |
| private boolean hasMain(IJavaElement element) { |
| try { |
| IType mainType = null; |
| if (element instanceof ICompilationUnit) { |
| ICompilationUnit cu = (ICompilationUnit) element; |
| mainType= cu.getType(Signature.getQualifier(cu.getElementName())); |
| } else if (element instanceof IClassFile) { |
| mainType = ((IClassFile)element).getType(); |
| } else if (element instanceof IType) { |
| mainType = (IType) element; |
| } else if (element instanceof IMember) { |
| mainType = ((IMember)element).getDeclaringType(); |
| } |
| if (mainType != null && mainType.exists() && JavaModelUtil.hasMainMethod(mainType)) { |
| return true; |
| } |
| } catch (JavaModelException e) { |
| } |
| return false; |
| } |
| } |