| /******************************************************************************* |
| * 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.core.search; |
| |
| import java.util.ArrayList; |
| |
| import org.eclipse.core.resources.IWorkspaceRoot; |
| import org.eclipse.core.resources.ResourcesPlugin; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.Path; |
| import org.eclipse.jdt.core.IClasspathEntry; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IJavaModel; |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.JavaModelException; |
| import org.eclipse.jdt.core.search.IJavaSearchScope; |
| import org.eclipse.jdt.core.search.SearchPattern; |
| import org.eclipse.jdt.internal.core.JarPackageFragmentRoot; |
| import org.eclipse.jdt.internal.core.JavaModelManager; |
| import org.eclipse.jdt.internal.core.JavaProject; |
| import org.eclipse.jdt.internal.core.search.indexing.IndexManager; |
| import org.eclipse.jdt.internal.core.search.matching.MatchLocator; |
| |
| /** |
| * Selects the indexes that correspond to projects in a given search scope |
| * and that are dependent on a given focus element. |
| */ |
| public class IndexSelector { |
| IJavaSearchScope searchScope; |
| SearchPattern pattern; |
| IPath[] indexLocations; // cache of the keys for looking index up |
| |
| public IndexSelector( |
| IJavaSearchScope searchScope, |
| SearchPattern pattern) { |
| |
| this.searchScope = searchScope; |
| this.pattern = pattern; |
| } |
| /** |
| * Returns whether elements of the given project or jar can see the given focus (an IJavaProject or |
| * a JarPackageFragmentRot) either because the focus is part of the project or the jar, or because it is |
| * accessible throught the project's classpath |
| */ |
| public static boolean canSeeFocus(IJavaElement focus, boolean isPolymorphicSearch, IPath projectOrJarPath) { |
| try { |
| IJavaModel model = focus.getJavaModel(); |
| IJavaProject project = getJavaProject(projectOrJarPath, model); |
| if (project == null) { |
| // projectOrJarPath is a jar |
| // it can see the focus only if it is on the classpath of a project that can see the focus |
| IJavaProject[] allProjects = model.getJavaProjects(); |
| for (int i = 0, length = allProjects.length; i < length; i++) { |
| IJavaProject otherProject = allProjects[i]; |
| IClasspathEntry[] entries = otherProject.getResolvedClasspath(true); |
| for (int j = 0, length2 = entries.length; j < length2; j++) { |
| IClasspathEntry entry = entries[j]; |
| if ((entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) |
| && entry.getPath().equals(projectOrJarPath)) { |
| if (canSeeFocus(focus, isPolymorphicSearch, otherProject.getPath())) { |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| // projectOrJarPath is a project |
| JavaProject focusProject = focus instanceof JarPackageFragmentRoot ? (JavaProject)focus.getParent() : (JavaProject)focus; |
| if (isPolymorphicSearch) { |
| // look for refering project |
| IClasspathEntry[] entries = focusProject.getExpandedClasspath(true); |
| for (int i = 0, length = entries.length; i < length; i++) { |
| IClasspathEntry entry = entries[i]; |
| if ((entry.getEntryKind() == IClasspathEntry.CPE_PROJECT) |
| && entry.getPath().equals(projectOrJarPath)) { |
| return true; |
| } |
| } |
| } |
| if (focus instanceof JarPackageFragmentRoot) { |
| // focus is part of a jar |
| IPath focusPath = focus.getPath(); |
| IClasspathEntry[] entries = ((JavaProject)project).getExpandedClasspath(true); |
| for (int i = 0, length = entries.length; i < length; i++) { |
| IClasspathEntry entry = entries[i]; |
| if ((entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) |
| && entry.getPath().equals(focusPath)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| // focus is part of a project |
| if (focus.equals(project)) { |
| return true; |
| } |
| // look for dependent projects |
| IPath focusPath = focusProject.getProject().getFullPath(); |
| IClasspathEntry[] entries = ((JavaProject)project).getExpandedClasspath(true); |
| for (int i = 0, length = entries.length; i < length; i++) { |
| IClasspathEntry entry = entries[i]; |
| if ((entry.getEntryKind() == IClasspathEntry.CPE_PROJECT) |
| && entry.getPath().equals(focusPath)) { |
| return true; |
| } |
| } |
| return false; |
| } catch (JavaModelException e) { |
| return false; |
| } |
| } |
| /* |
| * Compute the list of paths which are keying index files. |
| */ |
| private void initializeIndexLocations() { |
| |
| ArrayList requiredIndexKeys = new ArrayList(); |
| IPath[] projectsAndJars = this.searchScope.enclosingProjectsAndJars(); |
| IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); |
| IJavaElement projectOrJarFocus = MatchLocator.projectOrJarFocus(this.pattern); |
| boolean isPolymorphicSearch = this.pattern == null ? false : MatchLocator.isPolymorphicSearch(this.pattern); |
| IndexManager manager = JavaModelManager.getJavaModelManager().getIndexManager(); |
| for (int i = 0; i < projectsAndJars.length; i++) { |
| IPath location; |
| IPath path = projectsAndJars[i]; |
| if ((!root.getProject(path.lastSegment()).exists()) // if project does not exist |
| && path.segmentCount() > 1 |
| && ((location = root.getFile(path).getLocation()) == null |
| || !new java.io.File(location.toOSString()).exists()) // and internal jar file does not exist |
| && !new java.io.File(path.toOSString()).exists()) { // and external jar file does not exist |
| continue; |
| } |
| if (projectOrJarFocus == null || canSeeFocus(projectOrJarFocus, isPolymorphicSearch, path)) { |
| if (requiredIndexKeys.indexOf(path) == -1) { |
| requiredIndexKeys.add(new Path(manager.computeIndexLocation(path))); |
| } |
| } |
| } |
| this.indexLocations = new IPath[requiredIndexKeys.size()]; |
| requiredIndexKeys.toArray(this.indexLocations); |
| } |
| public IPath[] getIndexLocations() { |
| if (this.indexLocations == null) { |
| this.initializeIndexLocations(); |
| } |
| return this.indexLocations; |
| } |
| |
| /** |
| * Returns the java project that corresponds to the given path. |
| * Returns null if the path doesn't correspond to a project. |
| */ |
| private static IJavaProject getJavaProject(IPath path, IJavaModel model) { |
| IJavaProject project = model.getJavaProject(path.lastSegment()); |
| if (project.exists()) { |
| return project; |
| } |
| return null; |
| } |
| } |