Attachment 4264 Details for Bug 35306 – IndexSelector new version

IndexSelector new version

IndexSelector.java.txt (text/plain), 6.97 KB, created by Philipe Mulet

on 2003-03-20 10:43:34 EST

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Creator: Philipe Mulet

Created: 2003-03-20 10:43:34 EST

Size: 6.97 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2000, 2003 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.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.internal.core.JarPackageFragmentRoot;
>import org.eclipse.jdt.internal.core.JavaProject;
>import org.eclipse.jdt.internal.core.index.IIndex;
>import org.eclipse.jdt.internal.core.search.indexing.IndexManager;
>
>/**
> * 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;
>	IJavaElement focus;
>	IndexManager indexManager;
>	IPath[] indexKeys; // cache of the keys for looking index up
>	boolean isPolymorphicSearch;
>public IndexSelector(
>	IJavaSearchScope searchScope,
>	IJavaElement focus,
>	boolean isPolymorphicSearch,
>	IndexManager indexManager) {
>	this.searchScope = searchScope;
>	this.focus = focus;
>	this.indexManager = indexManager;
>	this.isPolymorphicSearch = isPolymorphicSearch;
>}
>/**
> * 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;
>		} else {
>			// 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;
>			} else {
>				// focus is part of a project
>				if (focus.equals(project)) {
>					return true;
>				} else {
>					// 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 initializeIndexKeys() {
>	
>	ArrayList requiredIndexKeys = new ArrayList();
>	IPath[] projectsAndJars = this.searchScope.enclosingProjectsAndJars();
>	IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
>	IJavaElement projectOrJarFocus = this.focus == null ? null : getProjectOrJar(this.focus);
>	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, this.isPolymorphicSearch, path)) {
>			if (requiredIndexKeys.indexOf(path) == -1) {
>				requiredIndexKeys.add(path);
>			}
>		}
>	}
>	this.indexKeys = new IPath[requiredIndexKeys.size()];
>	requiredIndexKeys.toArray(this.indexKeys);
>}
>public IIndex[] getIndexes() {
>	if (this.indexKeys == null) {
>		this.initializeIndexKeys(); 
>	}
>	// acquire the in-memory indexes on the fly
>	int length = this.indexKeys.length;
>	IIndex[] indexes = new IIndex[length];
>	for (int i = 0; i < length; i++){
>		// may trigger some index recreation work
>		indexes[i] = indexManager.getIndex(indexKeys[i], true /*reuse index file*/, false /*do not create if none*/);
>	}
>	return indexes;
>}
>/**
> * 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;
>	} else {
>		return null;
>	}
>}
>public static IJavaElement getProjectOrJar(IJavaElement element) {
>	while (!(element instanceof IJavaProject) && !(element instanceof JarPackageFragmentRoot)) {
>		element = element.getParent();
>	}
>	return element;
>}
>}

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Attachments on bug 35306: 4264