/*******************************************************************************
* Copyright (c) 2008, 2009 Wind River Systems, Inc. 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:
* Markus Schorn - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.resources;
import java.net.URI;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
/**
* Allows for looking up resources by location or name.
*/
public class ResourceLookup {
private static ResourceLookupTree lookupTree= new ResourceLookupTree();
public static void startup() {
lookupTree.startup();
}
public static void shutdown() {
lookupTree.shutdown();
}
/**
* Searches for files with the given location suffix.
*
* At this point the method works for sources and headers (no other content types), only.
* This is done to use less memory and can be changed if necessary.
* For linked resource files, the name of the link target is relevant.
*
* @param locationSuffix the suffix to match, always used as relative path.
* @param projects the projects to search
* @param ignoreCase whether or not to ignore case when comparing the suffix.
*/
public static IFile[] findFilesByName(IPath locationSuffix, IProject[] projects, boolean ignoreCase) {
return lookupTree.findFilesByName(locationSuffix, projects, ignoreCase);
}
/**
* Uses a lookup-tree that finds resources for locations using the canonical representation
* of the path.
*/
public static IFile[] findFilesForLocationURI(URI location) {
return lookupTree.findFilesForLocationURI(location);
}
/**
* Uses a lookup-tree that finds resources for locations using the canonical representation
* of the path. The method does not work for files where the name (last segment) of the
* resources differs from the name of the location.
*/
public static IFile[] findFilesForLocation(IPath location) {
return lookupTree.findFilesForLocation(location);
}
/**
* Uses {@link #findFilesForLocationURI(URI)} and selects the most relevant file
* from the result. Files form the first project, from cdt-projects and those on source
* roots are preferred, see {@link FileRelevance}.
* @param location an URI for the location of the files to search for.
* @param preferredProject a project to be preferred over others, or <code>null</code>.
* @return a file for the location in one of the given projects, or <code>null</code>.
* NB the returned IFile may not exist
*/
public static IFile selectFileForLocationURI(URI location, IProject preferredProject) {
return selectFile(findFilesForLocationURI(location), preferredProject);
}
/**
* Uses {@link #findFilesForLocation(IPath)} and selects the most relevant file
* from the result. Files form the preferred project, from cdt-projects and those on source
* roots are preferred, see {@link FileRelevance}.
* @param location a path for the location of the files to search for.
* @param preferredProject a project to be preferred over others, or <code>null</code>.
* @return a file for the location or <code>null</code>.
* NB the returned IFile may not exist
*/
public static IFile selectFileForLocation(IPath location, IProject preferredProject) {
return selectFile(findFilesForLocation(location), preferredProject);
}
private static IFile selectFile(IFile[] files, IProject preferredProject) {
if (files.length == 0)
return null;
if (files.length == 1)
return files[0];
IFile best= null;
int bestRelevance= -1;
for (int i = 0; i < files.length; i++) {
IFile file = files[i];
int relevance= FileRelevance.getRelevance(file, preferredProject);
if (best == null || relevance > bestRelevance ||
(relevance == bestRelevance &&
best.getFullPath().toString().compareTo(file.getFullPath().toString()) > 0)) {
bestRelevance= relevance;
best= file;
}
}
return best;
}
/**
* Sorts files by relevance for CDT, by the criteria listed below. The most relevant files
* is listed first.
* <br> Accessible files
* <br> Files of preferred project
* <br> Files of CDT projects
* <br> Files on a source root of a CDT project
*/
public static void sortFilesByRelevance(IFile[] filesToSort, final IProject preferredProject) {
Collections.sort(Arrays.asList(filesToSort), new Comparator<IFile>() {
public int compare(IFile f1, IFile f2) {
int r1= FileRelevance.getRelevance(f1, preferredProject);
int r2= FileRelevance.getRelevance(f2, preferredProject);
if (r1 > r2)
return -1;
if (r1 < r2)
return 1;
return f1.getFullPath().toString().compareTo(f2.getFullPath().toString());
}
});
}
/**
* For testing, only.
*/
public static void dump() {
lookupTree.dump();
}
/**
* For testing, only.
*/
public static void unrefNodeMap() {
lookupTree.unrefNodeMap();
}
/**
* For testing, only.
*/
public static void simulateNodeMapCollection() {
lookupTree.simulateNodeMapCollection();
}
}