| /******************************************************************************* |
| * Copyright (c) 2000, 2009 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.core.search; |
| |
| import org.eclipse.core.resources.IFolder; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.jdt.core.*; |
| import org.eclipse.jdt.core.search.IJavaSearchScope; |
| import org.eclipse.jdt.core.search.SearchPattern; |
| import org.eclipse.jdt.internal.compiler.util.SimpleSet; |
| import org.eclipse.jdt.internal.core.JarPackageFragmentRoot; |
| import org.eclipse.jdt.internal.core.JavaModel; |
| 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; |
| import org.eclipse.jdt.internal.core.search.matching.MethodPattern; |
| |
| /** |
| * 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(SearchPattern pattern, IPath projectOrJarPath) { |
| try { |
| IJavaModel model = JavaModelManager.getJavaModelManager().getJavaModel(); |
| IJavaProject project = getJavaProject(projectOrJarPath, model); |
| IJavaElement[] focuses = getFocusedElements(pattern, project); |
| if (focuses.length == 0) return false; |
| if (project != null) { |
| return canSeeFocus(focuses, (JavaProject) project); |
| } |
| |
| // 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++) { |
| JavaProject otherProject = (JavaProject) allProjects[i]; |
| IClasspathEntry entry = otherProject.getClasspathEntryFor(projectOrJarPath); |
| if (entry != null && entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) { |
| if (canSeeFocus(focuses, otherProject)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } catch (JavaModelException e) { |
| return false; |
| } |
| } |
| private static boolean canSeeFocus(IJavaElement[] focuses, JavaProject javaProject) { |
| int length = focuses.length; |
| for (int i=0; i<length; i++) { |
| if (canSeeFocus(focuses[i], javaProject)) return true; |
| } |
| return false; |
| } |
| private static boolean canSeeFocus(IJavaElement focus, JavaProject javaProject) { |
| try { |
| if (focus == null) return false; |
| if (focus.equals(javaProject)) return true; |
| |
| if (focus instanceof JarPackageFragmentRoot) { |
| // focus is part of a jar |
| IPath focusPath = focus.getPath(); |
| IClasspathEntry[] entries = javaProject.getExpandedClasspath(); |
| 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; |
| } |
| // look for dependent projects |
| IPath focusPath = ((JavaProject) focus).getProject().getFullPath(); |
| IClasspathEntry[] entries = javaProject.getExpandedClasspath(); |
| 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; |
| } |
| } |
| |
| /* |
| * Create the list of focused jars or projects. |
| */ |
| private static IJavaElement[] getFocusedElements(SearchPattern pattern, IJavaElement focusElement) throws JavaModelException { |
| if (pattern instanceof MethodPattern) { |
| // For method pattern, it needs to walk along the focus type super hierarchy |
| // and add jars/projects of all the encountered types. |
| IType type = (IType) pattern.focus.getAncestor(IJavaElement.TYPE); |
| MethodPattern methodPattern = (MethodPattern) pattern; |
| String selector = new String(methodPattern.selector); |
| int parameterCount = methodPattern.parameterCount; |
| ITypeHierarchy superHierarchy = type.newSupertypeHierarchy(null); |
| IType[] allTypes = superHierarchy.getAllSupertypes(type); |
| int length = allTypes.length; |
| SimpleSet focusSet = new SimpleSet(length+1); |
| if (focusElement != null) focusSet.add(focusElement); |
| for (int i=0; i<length; i++) { |
| IMethod[] methods = allTypes[i].getMethods(); |
| int mLength = methods.length; |
| for (int m=0; m<mLength; m++) { |
| if (parameterCount == methods[m].getNumberOfParameters() && methods[m].getElementName().equals(selector)) { |
| IPackageFragmentRoot root = (IPackageFragmentRoot) allTypes[i].getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT); |
| IJavaElement element = root.isArchive() ? root : root.getParent(); |
| focusSet.add(element); |
| } |
| } |
| } |
| // Rebuilt a contiguous array |
| IJavaElement[] focuses = new IJavaElement[focusSet.elementSize]; |
| Object[] values = focusSet.values; |
| int count = 0; |
| for (int i = values.length; --i >= 0;) { |
| if (values[i] != null) { |
| focuses[count++] = (IJavaElement) values[i]; |
| } |
| } |
| return focuses; |
| } |
| if (focusElement == null) return new IJavaElement[0]; |
| return new IJavaElement[] { focusElement }; |
| } |
| |
| /* |
| * Compute the list of paths which are keying index files. |
| */ |
| private void initializeIndexLocations() { |
| IPath[] projectsAndJars = this.searchScope.enclosingProjectsAndJars(); |
| IndexManager manager = JavaModelManager.getIndexManager(); |
| SimpleSet locations = new SimpleSet(); |
| IJavaElement focus = MatchLocator.projectOrJarFocus(this.pattern); |
| if (focus == null) { |
| for (int i = 0; i < projectsAndJars.length; i++) { |
| IPath path = projectsAndJars[i]; |
| Object target = JavaModel.getTarget(path, false/*don't check existence*/); |
| if (target instanceof IFolder) // case of an external folder |
| path = ((IFolder) target).getFullPath(); |
| locations.add(manager.computeIndexLocation(path)); |
| } |
| } else { |
| try { |
| // find the projects from projectsAndJars that see the focus then walk those projects looking for the jars from projectsAndJars |
| int length = projectsAndJars.length; |
| JavaProject[] projectsCanSeeFocus = new JavaProject[length]; |
| SimpleSet visitedProjects = new SimpleSet(length); |
| int projectIndex = 0; |
| SimpleSet externalLibsToCheck = new SimpleSet(length); |
| IJavaElement[] focuses = getFocusedElements(this.pattern, focus); |
| IJavaModel model = JavaModelManager.getJavaModelManager().getJavaModel(); |
| for (int i = 0; i < length; i++) { |
| IPath path = projectsAndJars[i]; |
| JavaProject project = (JavaProject) getJavaProject(path, model); |
| if (project != null) { |
| visitedProjects.add(project); |
| if (canSeeFocus(focuses, project)) { |
| locations.add(manager.computeIndexLocation(path)); |
| projectsCanSeeFocus[projectIndex++] = project; |
| } |
| } else { |
| externalLibsToCheck.add(path); |
| } |
| } |
| for (int i = 0; i < projectIndex && externalLibsToCheck.elementSize > 0; i++) { |
| IClasspathEntry[] entries = projectsCanSeeFocus[i].getResolvedClasspath(); |
| for (int j = entries.length; --j >= 0;) { |
| IClasspathEntry entry = entries[j]; |
| if (entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) { |
| IPath path = entry.getPath(); |
| if (externalLibsToCheck.remove(path) != null) { |
| Object target = JavaModel.getTarget(path, false/*don't check existence*/); |
| if (target instanceof IFolder) // case of an external folder |
| path = ((IFolder) target).getFullPath(); |
| locations.add(manager.computeIndexLocation(path)); |
| } |
| } |
| } |
| } |
| // jar files can be included in the search scope without including one of the projects that references them, so scan all projects that have not been visited |
| if (externalLibsToCheck.elementSize > 0) { |
| IJavaProject[] allProjects = model.getJavaProjects(); |
| for (int i = 0, l = allProjects.length; i < l && externalLibsToCheck.elementSize > 0; i++) { |
| JavaProject project = (JavaProject) allProjects[i]; |
| if (!visitedProjects.includes(project)) { |
| IClasspathEntry[] entries = project.getResolvedClasspath(); |
| for (int j = entries.length; --j >= 0;) { |
| IClasspathEntry entry = entries[j]; |
| if (entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) { |
| IPath path = entry.getPath(); |
| if (externalLibsToCheck.remove(path) != null) { |
| Object target = JavaModel.getTarget(path, false/*don't check existence*/); |
| if (target instanceof IFolder) // case of an external folder |
| path = ((IFolder) target).getFullPath(); |
| locations.add(manager.computeIndexLocation(path)); |
| } |
| } |
| } |
| } |
| } |
| } |
| } catch (JavaModelException e) { |
| // ignored |
| } |
| } |
| |
| this.indexLocations = new IPath[locations.elementSize]; |
| Object[] values = locations.values; |
| int count = 0; |
| for (int i = values.length; --i >= 0;) |
| if (values[i] != null) |
| this.indexLocations[count++] = (IPath) values[i]; |
| } |
| |
| public IPath[] getIndexLocations() { |
| if (this.indexLocations == null) { |
| 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; |
| } |
| } |