| /******************************************************************************* |
| * Copyright (c) 2011, 2013 RĂ¼diger Herrmann 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: |
| * RĂ¼diger Herrmann - initial API and implementation |
| * EclipseSource - ongoing development |
| ******************************************************************************/ |
| package org.eclipse.rap.ui.internal.launch.rwt.shortcut; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.*; |
| import org.eclipse.jdt.core.*; |
| import org.eclipse.jdt.core.search.*; |
| import org.eclipse.jface.operation.IRunnableContext; |
| import org.eclipse.rap.ui.internal.launch.rwt.shortcut.RunnableContextHelper.IContextRunnable; |
| import org.eclipse.rap.ui.internal.launch.rwt.util.StringArrays; |
| |
| |
| class EntryPointSearchEngine { |
| |
| private static final int SCOPE_CONSTRAINTS |
| = IJavaSearchScope.SOURCES |
| | IJavaSearchScope.APPLICATION_LIBRARIES |
| | IJavaSearchScope.REFERENCED_PROJECTS; |
| |
| private final RunnableContextHelper runnableContextHelper; |
| private final EntryPointCollector entryPointCollector; |
| private IJavaSearchScope searchScope; |
| |
| |
| EntryPointSearchEngine( IRunnableContext runnableContext ) { |
| runnableContextHelper = new RunnableContextHelper( runnableContext ); |
| entryPointCollector = new EntryPointCollector(); |
| } |
| |
| IType[] search( IJavaElement[] javaElements ) throws CoreException, InterruptedException { |
| searchScope = SearchEngine.createJavaSearchScope( javaElements, SCOPE_CONSTRAINTS ); |
| entryPointCollector.clear(); |
| IContextRunnable contextRunnable = new IContextRunnable() { |
| public void run( IProgressMonitor monitor ) throws Exception { |
| search( monitor ); |
| } |
| }; |
| runnableContextHelper.runInContext( contextRunnable ); |
| return entryPointCollector.getResult(); |
| } |
| |
| private void search( IProgressMonitor monitor ) throws CoreException { |
| monitor.beginTask( "Searching for entry points...", 100 ); |
| try { |
| int matchRule = SearchPattern.R_EXACT_MATCH | SearchPattern.R_CASE_SENSITIVE; |
| SearchParticipant[] participants = getSearchParticipants(); |
| IProgressMonitor searchMonitor = new SubProgressMonitor( monitor, 100 ); |
| SearchEngine searchEngine = new SearchEngine(); |
| SearchPattern pattern1 |
| = SearchPattern.createPattern( "createUI() int", //$NON-NLS-1$ |
| IJavaSearchConstants.METHOD, |
| IJavaSearchConstants.DECLARATIONS, |
| matchRule ); |
| SearchPattern pattern2 |
| = SearchPattern.createPattern( "createContents( Composite ) void", //$NON-NLS-1$ |
| IJavaSearchConstants.METHOD, |
| IJavaSearchConstants.DECLARATIONS, |
| matchRule ); |
| SearchPattern pattern = SearchPattern.createOrPattern( pattern1, pattern2 ); |
| searchEngine.search( pattern, participants, searchScope, entryPointCollector, searchMonitor ); |
| } finally { |
| monitor.done(); |
| } |
| } |
| |
| private static SearchParticipant[] getSearchParticipants() { |
| return new SearchParticipant[]{ SearchEngine.getDefaultSearchParticipant() }; |
| } |
| |
| private static class EntryPointCollector extends SearchRequestor { |
| private final List<IType> collectedTypes; |
| |
| public EntryPointCollector() { |
| collectedTypes = new LinkedList<IType>(); |
| } |
| |
| void clear() { |
| collectedTypes.clear(); |
| } |
| |
| IType[] getResult() { |
| return collectedTypes.toArray( new IType[ collectedTypes.size() ] ); |
| } |
| |
| public void acceptSearchMatch( SearchMatch match ) throws CoreException { |
| Object enclosingElement = match.getElement(); |
| if( enclosingElement instanceof IMethod ) { |
| IMethod method = ( IMethod )enclosingElement; |
| IType type = method.getDeclaringType(); |
| if( isEntryPointType( type ) ) { |
| collectedTypes.add( type ); |
| } |
| } |
| } |
| |
| private static boolean isEntryPointType( IType type ) throws JavaModelException { |
| return new TypeInspector( type ).isEntryPointType(); |
| } |
| } |
| |
| private static class TypeInspector { |
| private static final String[] NO_PARAMETERS = new String[ 0 ]; |
| private static final String[] COMPOSITE_PARAMETER = new String[] { "QComposite;" }; //$NON-NLS-1$ |
| |
| private final IType type; |
| |
| TypeInspector( IType type ) { |
| this.type = type; |
| } |
| |
| boolean isEntryPointType() throws JavaModelException { |
| boolean result = false; |
| if( type.isClass() ) { |
| if( implementsEntryPoint() ) { |
| result = hasCreateUIMethod() && !isAbstract(); |
| } else if( extendsAbstractEntryPoint() ) { |
| result = hasCreateContentsMethod() && !isAbstract(); |
| } |
| } |
| return result; |
| } |
| |
| private boolean implementsEntryPoint() throws JavaModelException { |
| String[] superInterfaceNames = type.getSuperInterfaceNames(); |
| return StringArrays.contains( superInterfaceNames, "EntryPoint" ) //$NON-NLS-1$ |
| || StringArrays.contains( superInterfaceNames, "IEntryPoint" ); //$NON-NLS-1$ |
| } |
| |
| private boolean hasCreateUIMethod() { |
| IMethod method = type.getMethod( "createUI", NO_PARAMETERS ); //$NON-NLS-1$ |
| return method.exists(); |
| } |
| |
| private boolean extendsAbstractEntryPoint() throws JavaModelException { |
| String superClassName = type.getSuperclassName(); |
| return "AbstractEntryPoint".equals( superClassName ); //$NON-NLS-1$ |
| } |
| |
| private boolean hasCreateContentsMethod() { |
| IMethod method = type.getMethod( "createContents", COMPOSITE_PARAMETER ); //$NON-NLS-1$ |
| return method.exists(); |
| } |
| |
| private boolean isAbstract() throws JavaModelException { |
| return Flags.isAbstract( type.getFlags() ); |
| } |
| } |
| } |