| /******************************************************************************* |
| * Copyright (c) 2007, 2011 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.text.correction; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashSet; |
| import java.util.List; |
| |
| import org.eclipse.core.expressions.EvaluationContext; |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.ExpressionConverter; |
| import org.eclipse.core.expressions.ExpressionTagNames; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.MultiStatus; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.core.runtime.Status; |
| |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.JavaCore; |
| |
| import org.eclipse.jdt.ui.JavaUI; |
| import org.eclipse.jdt.ui.text.java.ClasspathFixProcessor; |
| import org.eclipse.jdt.ui.text.java.ClasspathFixProcessor.ClasspathFixProposal; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.internal.ui.dialogs.StatusInfo; |
| |
| public final class ClasspathFixProcessorDescriptor { |
| |
| private static final String ATT_EXTENSION = "classpathFixProcessors"; //$NON-NLS-1$ |
| |
| private static final String ID= "id"; //$NON-NLS-1$ |
| private static final String CLASS= "class"; //$NON-NLS-1$ |
| |
| private static final String OVERRIDES= "overrides"; //$NON-NLS-1$ |
| |
| private static ClasspathFixProcessorDescriptor[] fgContributedClasspathFixProcessors; |
| |
| private final IConfigurationElement fConfigurationElement; |
| private ClasspathFixProcessor fProcessorInstance; |
| private List<String> fOverriddenIds; |
| private Boolean fStatus; |
| |
| public ClasspathFixProcessorDescriptor(IConfigurationElement element) { |
| fConfigurationElement= element; |
| fProcessorInstance= null; |
| fStatus= null; // undefined |
| if (fConfigurationElement.getChildren(ExpressionTagNames.ENABLEMENT).length == 0) { |
| fStatus= Boolean.TRUE; |
| } |
| IConfigurationElement[] children= fConfigurationElement.getChildren(OVERRIDES); |
| if (children.length > 0) { |
| fOverriddenIds= new ArrayList<String>(children.length); |
| for (int i= 0; i < children.length; i++) { |
| fOverriddenIds.add(children[i].getAttribute(ID)); |
| } |
| } else { |
| fOverriddenIds= Collections.emptyList(); |
| } |
| } |
| |
| public String getID() { |
| return fConfigurationElement.getAttribute(ID); |
| } |
| |
| public Collection<String> getOverridenIds() { |
| return fOverriddenIds; |
| } |
| |
| public IStatus checkSyntax() { |
| IConfigurationElement[] children= fConfigurationElement.getChildren(ExpressionTagNames.ENABLEMENT); |
| if (children.length > 1) { |
| return new StatusInfo(IStatus.ERROR, "Only one < enablement > element allowed. Disabling " + getID()); //$NON-NLS-1$ |
| } |
| return new StatusInfo(IStatus.OK, "Syntactically correct classpath fix processor"); //$NON-NLS-1$ |
| } |
| |
| public boolean matches(IJavaProject javaProject) { |
| if (fStatus != null) { |
| return fStatus.booleanValue(); |
| } |
| |
| IConfigurationElement[] children= fConfigurationElement.getChildren(ExpressionTagNames.ENABLEMENT); |
| if (children.length == 1) { |
| try { |
| ExpressionConverter parser= ExpressionConverter.getDefault(); |
| Expression expression= parser.perform(children[0]); |
| EvaluationContext evalContext= new EvaluationContext(null, javaProject); |
| evalContext.addVariable("project", javaProject); //$NON-NLS-1$ |
| evalContext.addVariable("sourceLevel", javaProject.getOption(JavaCore.COMPILER_SOURCE, true)); //$NON-NLS-1$ |
| return expression.evaluate(evalContext) == EvaluationResult.TRUE; |
| } catch (CoreException e) { |
| JavaPlugin.log(e); |
| } |
| return false; |
| } |
| fStatus= Boolean.FALSE; |
| return false; |
| } |
| |
| public ClasspathFixProcessor getProcessor(IJavaProject project) { |
| if (matches(project)) { |
| if (fProcessorInstance == null) { |
| try { |
| Object extension= fConfigurationElement.createExecutableExtension(CLASS); |
| if (extension instanceof ClasspathFixProcessor) { |
| fProcessorInstance= (ClasspathFixProcessor) extension; |
| } else { |
| String message= "Invalid extension to " + ATT_EXTENSION //$NON-NLS-1$ |
| + ". Must extends ClasspathFixProcessor: " + getID(); //$NON-NLS-1$ |
| JavaPlugin.log(new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, message)); |
| fStatus= Boolean.FALSE; |
| return null; |
| } |
| } catch (CoreException e) { |
| JavaPlugin.log(e); |
| fStatus= Boolean.FALSE; |
| return null; |
| } |
| } |
| return fProcessorInstance; |
| } |
| return null; |
| } |
| |
| private static ClasspathFixProcessorDescriptor[] getCorrectionProcessors() { |
| if (fgContributedClasspathFixProcessors == null) { |
| IConfigurationElement[] elements= Platform.getExtensionRegistry().getConfigurationElementsFor(JavaUI.ID_PLUGIN, ATT_EXTENSION); |
| ArrayList<ClasspathFixProcessorDescriptor> res= new ArrayList<ClasspathFixProcessorDescriptor>(elements.length); |
| |
| for (int i= 0; i < elements.length; i++) { |
| ClasspathFixProcessorDescriptor desc= new ClasspathFixProcessorDescriptor(elements[i]); |
| IStatus status= desc.checkSyntax(); |
| if (status.isOK()) { |
| res.add(desc); |
| } else { |
| JavaPlugin.log(status); |
| } |
| } |
| fgContributedClasspathFixProcessors= res.toArray(new ClasspathFixProcessorDescriptor[res.size()]); |
| Arrays.sort(fgContributedClasspathFixProcessors, new Comparator<ClasspathFixProcessorDescriptor>() { |
| public int compare(ClasspathFixProcessorDescriptor d1, ClasspathFixProcessorDescriptor d2) { |
| if (d1.getOverridenIds().contains(d2.getID())) { |
| return -1; |
| } |
| if (d2.getOverridenIds().contains(d1.getID())) { |
| return 1; |
| } |
| return 0; |
| } |
| }); |
| } |
| return fgContributedClasspathFixProcessors; |
| } |
| |
| public static ClasspathFixProposal[] getProposals(final IJavaProject project, final String missingType, final MultiStatus status) { |
| final ArrayList<ClasspathFixProposal> proposals= new ArrayList<ClasspathFixProposal>(); |
| |
| final HashSet<String> overriddenIds= new HashSet<String>(); |
| ClasspathFixProcessorDescriptor[] correctionProcessors= getCorrectionProcessors(); |
| for (int i= 0; i < correctionProcessors.length; i++) { |
| final ClasspathFixProcessorDescriptor curr= correctionProcessors[i]; |
| if (!overriddenIds.contains(curr.getID())) { |
| SafeRunner.run(new ISafeRunnable() { |
| public void run() throws Exception { |
| ClasspathFixProcessor processor= curr.getProcessor(project); |
| if (processor != null) { |
| ClasspathFixProposal[] fixProposals= processor.getFixImportProposals(project, missingType); |
| if (fixProposals != null) { |
| for (int k= 0; k < fixProposals.length; k++) { |
| proposals.add(fixProposals[k]); |
| } |
| overriddenIds.addAll(curr.getOverridenIds()); |
| } |
| } |
| } |
| public void handleException(Throwable exception) { |
| if (status != null) { |
| status.merge(new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, IStatus.ERROR, CorrectionMessages.ClasspathFixProcessorDescriptor_error_processing_processors, exception)); |
| } |
| } |
| }); |
| } |
| } |
| return proposals.toArray(new ClasspathFixProposal[proposals.size()]); |
| } |
| } |