Java tutorial
/******************************************************************************* * Copyright (c) 2007, 2009 Spring IDE Developers * 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: * Spring IDE Developers - initial API and implementation *******************************************************************************/ package org.springframework.ide.eclipse.beans.ui.search.jdt; import java.util.ArrayList; import java.util.List; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.jdt.core.IField; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IMethod; import org.eclipse.jdt.core.IType; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.ui.search.ElementQuerySpecification; import org.eclipse.jdt.ui.search.IMatchPresentation; import org.eclipse.jdt.ui.search.IQueryParticipant; import org.eclipse.jdt.ui.search.ISearchRequestor; import org.eclipse.jdt.ui.search.PatternQuerySpecification; import org.eclipse.jdt.ui.search.QuerySpecification; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.search.ui.ISearchQuery; import org.eclipse.search.ui.text.Match; import org.eclipse.ui.PartInitException; import org.springframework.ide.eclipse.beans.core.internal.model.BeansModelUtils; import org.springframework.ide.eclipse.beans.core.model.IBean; import org.springframework.ide.eclipse.beans.ui.BeansUIUtils; import org.springframework.ide.eclipse.beans.ui.search.internal.BeansSearchLabelProvider; import org.springframework.ide.eclipse.beans.ui.search.internal.BeansSearchResult; import org.springframework.ide.eclipse.beans.ui.search.internal.BeansSearchScope; import org.springframework.ide.eclipse.beans.ui.search.internal.queries.BeanClassQuery; import org.springframework.ide.eclipse.beans.ui.search.internal.queries.BeanPropertyQuery; import org.springframework.ide.eclipse.beans.ui.search.internal.queries.BeanReferenceQuery; import org.springframework.ide.eclipse.core.java.JdtUtils; import org.springframework.ide.eclipse.core.model.IResourceModelElement; import org.springframework.util.StringUtils; /** * {@link IQueryParticipant} implementation that hooks into JDT's Java reference search and displays {@link IBean} that * have the class or property name under question * @author Christian Dupuis * @author Torsten Juergeleit * @since 2.0 */ public class BeansJavaSearchParticipant implements IQueryParticipant, IMatchPresentation { private static final int SEARCH_FOR_TYPES = 0; private static final int SEARCH_FOR_FIELDS = 1; private static final int LIMIT_TO_REF = 2; private static final int LIMIT_TO_ALL = 3; private int searchFor = -1; public int estimateTicks(QuerySpecification specification) { return 100; } public IMatchPresentation getUIParticipant() { return this; } public void search(final ISearchRequestor requestor, QuerySpecification querySpecification, IProgressMonitor monitor) { if (querySpecification.getLimitTo() != LIMIT_TO_REF && querySpecification.getLimitTo() != LIMIT_TO_ALL) { return; } String search = null; List<String> requiredTypeNames = new ArrayList<String>(); IJavaProject project = null; if (querySpecification instanceof ElementQuerySpecification) { ElementQuerySpecification elementQuerySpecification = (ElementQuerySpecification) querySpecification; if (elementQuerySpecification.getElement() instanceof IType) { search = ((IType) elementQuerySpecification.getElement()).getFullyQualifiedName(); project = ((IType) elementQuerySpecification.getElement()).getJavaProject(); } else if (elementQuerySpecification.getElement() instanceof IField) { IField field = ((IField) elementQuerySpecification.getElement()); search = field.getElementName(); getTypeHierachy(monitor, requiredTypeNames, field.getDeclaringType()); project = field.getJavaProject(); } else if (elementQuerySpecification.getElement() instanceof IMethod) { IMethod method = ((IMethod) elementQuerySpecification.getElement()); search = method.getElementName(); // do property name magic if (search.startsWith("set")) { search = StringUtils.uncapitalize(search.substring(3)); } getTypeHierachy(monitor, requiredTypeNames, method.getDeclaringType()); project = method.getJavaProject(); } else { search = elementQuerySpecification.getElement().getElementName(); } int type = ((ElementQuerySpecification) querySpecification).getElement().getElementType(); if (type == IJavaElement.TYPE) { searchFor = SEARCH_FOR_TYPES; } else if (type == IJavaElement.FIELD || type == IJavaElement.METHOD) { searchFor = SEARCH_FOR_FIELDS; } } else { searchFor = ((PatternQuerySpecification) querySpecification).getSearchFor(); search = ((PatternQuerySpecification) querySpecification).getPattern(); } List<ISearchQuery> queries = new ArrayList<ISearchQuery>(); BeansSearchScope scope = BeansSearchScope.newSearchScope(); if (searchFor == SEARCH_FOR_TYPES) { queries.add(new BeanClassQuery(scope, search, true, false)); } else if (searchFor == SEARCH_FOR_FIELDS) { queries.add(new BeanPropertyQuery(scope, search, true, false)); queries.add(new BeanReferenceQuery(scope, search, true, false)); } for (ISearchQuery query : queries) { query.run(monitor); BeansSearchResult searchResult = (BeansSearchResult) query.getSearchResult(); for (Object obj : searchResult.getElements()) { Match[] matches = searchResult.getMatches(obj); if (matches != null && matches.length > 0) { for (Match match : matches) { if (match.getElement() instanceof IBean) { IBean bean = (IBean) match.getElement(); IType type = JdtUtils.getJavaType(bean.getElementResource().getProject(), bean.getClassName()); if (project == null || (type != null && project.isOnClasspath(type))) { if (searchFor == SEARCH_FOR_FIELDS) { // check if the match fits to the selected class String beanClass = BeansModelUtils.getBeanClass(bean, null); if (requiredTypeNames.contains(beanClass)) { requestor.reportMatch(match); } } else { requestor.reportMatch(match); } } } else { requestor.reportMatch(match); } } } } } } private void getTypeHierachy(IProgressMonitor monitor, List<String> requiredTypeNames, IType baseType) { try { IType[] types = baseType.newTypeHierarchy(monitor).getAllSubtypes(baseType); requiredTypeNames.add(baseType.getFullyQualifiedName()); for (IType type : types) { requiredTypeNames.add(type.getFullyQualifiedName()); } } catch (JavaModelException e) { } } public ILabelProvider createLabelProvider() { // This label provider will be disposed by the search page return new BeansSearchLabelProvider(true); } public void showMatch(Match match, int currentOffset, int currentLength, boolean activate) throws PartInitException { if (match.getElement() instanceof IResourceModelElement) { BeansUIUtils.openInEditor((IResourceModelElement) match.getElement(), activate); } } }