/**
* Copyright (C) 2005 - 2012 Eric Van Dewoestine
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.eclim.plugin.jdt.util;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclim.logging.Logger;
import org.eclim.plugin.core.util.ProjectUtils;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaModelException;
/**
* Utility methods for working with the java project's classpath.
*
* @author Eric Van Dewoestine
*/
public class ClasspathUtils
{
private static final Logger logger = Logger.getLogger(ClasspathUtils.class);
/**
* Gets an array of paths representing the project's classpath.
*
* @param project The java project instance.
* @return Array of paths.
*/
public static String[] getClasspath(IJavaProject project)
throws Exception
{
HashSet<IJavaProject> visited = new HashSet<IJavaProject>();
ArrayList<String> paths = new ArrayList<String>();
collect(project, paths, visited, true);
return paths.toArray(new String[paths.size()]);
}
/**
* Gets an array of paths representing the project's source paths.
*
* @param project The java project instance.
* @return Array of paths.
*/
public static String[] getSrcPaths(IJavaProject project)
throws Exception
{
ArrayList<String> paths = new ArrayList<String>();
IClasspathEntry[] entries = project.getResolvedClasspath(true);
for (IClasspathEntry entry : entries){
if (entry.getEntryKind() == IClasspathEntry.CPE_SOURCE){
paths.add(ProjectUtils.getFilePath(
project.getProject(), entry.getPath().toOSString()));
}
}
return paths.toArray(new String[paths.size()]);
}
/**
* Recursively collects classpath entries from the current and dependent
* projects.
*/
private static void collect(
IJavaProject javaProject,
List<String> paths,
Set<IJavaProject> visited,
boolean isFirstProject)
throws Exception
{
if(visited.contains(javaProject)){
return;
}
visited.add(javaProject);
try{
IPath out = javaProject.getOutputLocation();
paths.add(
ProjectUtils.getFilePath(
javaProject.getProject(),
out.addTrailingSeparator().toOSString()));
}catch(JavaModelException ignore){
// ignore... just signals that no output dir was configured.
}
IProject project = javaProject.getProject();
String name = project.getName();
IClasspathEntry[] entries = null;
try {
entries = javaProject.getResolvedClasspath(true);
}catch(JavaModelException jme){
// this may or may not be a problem.
logger.warn(
"Unable to retrieve resolved classpath for project: " + name, jme);
return;
}
final List<IJavaProject> nextProjects = new ArrayList<IJavaProject>();
for(IClasspathEntry entry : entries) {
switch (entry.getEntryKind()) {
case IClasspathEntry.CPE_LIBRARY :
case IClasspathEntry.CPE_CONTAINER :
case IClasspathEntry.CPE_VARIABLE :
String path = entry.getPath().toOSString().replace('\\', '/');
if(path.startsWith("/" + name + "/")){
path = ProjectUtils.getFilePath(project, path);
}
paths.add(path);
break;
case IClasspathEntry.CPE_PROJECT :
if (isFirstProject || entry.isExported()){
javaProject =
JavaUtils.getJavaProject(entry.getPath().segment(0));
if (javaProject != null){
// breadth first, not depth first, to preserve dependency ordering
nextProjects.add(javaProject);
}
}
break;
case IClasspathEntry.CPE_SOURCE :
IPath out = entry.getOutputLocation();
if (out != null){
paths.add(
ProjectUtils.getFilePath(
javaProject.getProject(),
out.addTrailingSeparator().toOSString()));
}
break;
}
}
// depth second
for(final IJavaProject nextProject : nextProjects) {
collect(nextProject, paths, visited, false);
}
}
}