apet.utils.ClasspathUtils.java Source code

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Here is the source code for apet.utils.ClasspathUtils.java

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/**
Copyright (C) 2010  E.Albert, P.Arenas, S.Genaim, G.Puebla, and D.Zanardini, G. Roman
                https://costa.ls.fi.upm.es
    
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 apet.utils;

import java.io.File;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.internal.core.JavaModel;

/**
 * Class to get the project classpath
 * @author groman
 * @license GPL
 */
public class ClasspathUtils {

    /**
     * Returns the Eclipse Project class loader using project build path
     * @param javaProject Eclipse Java Project
     * @return A class loader using project build path
     * @throws Exception If the project is no valid
     */
    public static ClassLoader getProjectClassLoader(IJavaProject javaProject) throws Exception {
        IClasspathEntry[] entries = javaProject.getResolvedClasspath(true);
        String wsPath = javaProject.getProject().getLocation().toPortableString();
        String firstEntryLocation = javaProject.getPath().toPortableString();
        int idx = wsPath.indexOf(firstEntryLocation);

        URL[] urls = null;
        int i = 0;

        //System.out.println("ClassLoader " + wsPath);
        //System.out.println("ClassLoader " + firstEntryLocation);

        String output = javaProject.getOutputLocation().toPortableString();
        urls = new URL[entries.length + 1];

        if (idx != -1) {
            wsPath = wsPath.substring(0, idx);
        } else {
            output = output.substring(firstEntryLocation.length());
        }
        urls[i++] = new File(wsPath + output).toURL();

        //System.out.println("ClassLoader " + output);

        String fullPath = null;

        for (IClasspathEntry entry : entries) {
            if (entry.getEntryKind() == IClasspathEntry.CPE_PROJECT) {
                IResource project = ResourcesPlugin.getWorkspace().getRoot().findMember(entry.getPath());
                String projectPath = JavaCore.create(project.getProject()).getOutputLocation().toPortableString();
                fullPath = wsPath + projectPath;
            } else {
                Object resource = JavaModel.getTarget(entry.getPath(), true);

                if (resource instanceof IResource) {
                    IResource iFile = (IResource) resource;
                    fullPath = iFile.getLocation().toPortableString();
                } else if (resource instanceof File) {
                    File file = (File) resource;
                    fullPath = file.getAbsolutePath();
                }
            }

            urls[i++] = new File(fullPath).toURL();
            //System.out.println(fullPath);
        }

        URLClassLoader classLoader = new URLClassLoader(urls, String.class.getClassLoader());

        /*for (int j = 0; j < urls.length; j ++) {
           System.out.println(urls[j]);
        }*/

        return classLoader;
    }

    /**
     * Returns a String with all libraries defined in build path
     * @param javaProject Eclipse Java Project
     * @return a String with all libraries defined in build path
     * @throws Exception If the project is no valid
     */
    public static String getStringClasspath(IJavaProject javaProject) throws Exception {

        IClasspathEntry[] entries = javaProject.getResolvedClasspath(true);
        String wsPath = javaProject.getProject().getLocation().toPortableString();
        String firstEntryLocation = javaProject.getPath().toPortableString();
        int idx = wsPath.indexOf(firstEntryLocation);

        String[] urls = new String[entries.length + 1];
        String fullPath = null;
        int i = 0;
        String output = javaProject.getOutputLocation().toPortableString();

        if (idx != -1) {
            wsPath = wsPath.substring(0, idx);
        } else {
            output = output.substring(firstEntryLocation.length());
        }
        urls[i++] = wsPath + output;

        for (IClasspathEntry entry : entries) {
            if (entry.getEntryKind() == IClasspathEntry.CPE_PROJECT) {
                IResource project = ResourcesPlugin.getWorkspace().getRoot().findMember(entry.getPath());
                String projectPath = JavaCore.create(project.getProject()).getOutputLocation().toPortableString();
                fullPath = wsPath + projectPath;
            } else {
                Object resource = JavaModel.getTarget(entry.getPath(), true);

                if (resource instanceof IResource) {
                    IResource iFile = (IResource) resource;
                    fullPath = iFile.getLocation().toPortableString();
                } else if (resource instanceof File) {
                    File file = (File) resource;
                    fullPath = file.getAbsolutePath();
                }
            }

            urls[i++] = fullPath;
        }

        StringBuffer buffer = new StringBuffer();
        for (String url : urls) {
            buffer.append(url);
            buffer.append(":");
        }

        return buffer.toString().substring(0, buffer.length() - 1);

    }

    public static void createPath(String path) {
        new File(path.replaceAll("[/]", "//")).mkdirs();
    }

}