net.sf.spindle.core.util.eclipse.JarEntryFileUtil.java Source code

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Here is the source code for net.sf.spindle.core.util.eclipse.JarEntryFileUtil.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Spindle, an Eclipse Plugin for Tapestry.
 *
 * The Initial Developer of the Original Code is
 * Geoffrey Longman.
 * Portions created by the Initial Developer are Copyright (C) 2001-2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * 
 *  glongman@gmail.com
 *
 * ***** END LICENSE BLOCK ***** */

package net.sf.spindle.core.util.eclipse;

import java.util.ArrayList;

import org.apache.commons.lang.StringUtils;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.internal.core.JarEntryFile;
import org.eclipse.jdt.internal.core.JarPackageFragmentRoot;

/**
 * TODO Add Type comment
 * 
 * @author glongman@gmail.com
 */
public class JarEntryFileUtil {
    static private final int start = "JarEntryFile[".length();

    public static boolean isJarEntryFile(Object obj) {
        if (obj == null)
            return false;
        return obj instanceof JarEntryFile;
    }

    public static String getJarPath(JarEntryFile entry) {
        String content = entry.toString();
        int stop = content.indexOf("::");
        return content.substring(start, stop);
    }

    public static String getPackageName(JarEntryFile entry) {
        String content = entry.toString();
        int start = content.indexOf("::");
        content = content.substring(start + 2, content.length() - 1);
        int nameLength = entry.getName().length();
        if (content.length() == nameLength)
            return "";
        int stop = content.lastIndexOf('/');
        return StringUtils.replace(content.substring(0, stop), "/", ".");
    }

    public static IPackageFragmentRoot getPackageFragmentRoot(IJavaProject project, JarEntryFile entry)
            throws CoreException {
        return getPackageFragmentRoot(project, entry, true);
    }

    private static IPackageFragmentRoot getPackageFragmentRoot(IJavaProject project, JarEntryFile entry,
            boolean includeOtherProjects) throws CoreException {
        String path = getJarPath(entry);
        IPackageFragmentRoot[] roots = includeOtherProjects ? project.getAllPackageFragmentRoots()
                : project.getPackageFragmentRoots();
        for (int i = 0; i < roots.length; i++) {
            if (roots[i].getKind() != IPackageFragmentRoot.K_BINARY)
                continue;

            if (((JarPackageFragmentRoot) roots[i]).getJar().getName().equals(path)) {
                return roots[i];
            }
        }
        return null;
    }

    public static IPackageFragment getPackageFragment(IJavaProject project, IStorage storage) throws CoreException {
        if (!isJarEntryFile(storage))
            return null;
        return getPackageFragment(project, (JarEntryFile) storage);
    }

    public static IPackageFragment getPackageFragment(IJavaProject project, JarEntryFile entry)
            throws CoreException {
        return getPackageFragment(project, entry, true);
    }

    private static IPackageFragment getPackageFragment(IJavaProject project, JarEntryFile entry,
            boolean includeOtherProjects) throws CoreException {
        IPackageFragmentRoot root = getPackageFragmentRoot(project, entry, includeOtherProjects);
        if (root == null)
            return null;

        String packageName = getPackageName(entry);
        IJavaElement[] elements = root.getChildren();
        for (int i = 0; i < elements.length; i++) {
            if (elements[i].getElementType() != IJavaElement.PACKAGE_FRAGMENT)
                continue;

            if (elements[i].getElementName().equals(packageName))
                return (IPackageFragment) elements[i];
        }
        return null;
    }

    public static IPackageFragment[] getPackageFragments(IWorkspaceRoot root, JarEntryFile entry)
            throws CoreException {
        ArrayList result = new ArrayList();
        IProject[] projects = root.getProjects();
        for (int i = 0; i < projects.length; i++) {
            if (!projects[i].isOpen() || !projects[i].hasNature(JavaCore.NATURE_ID))
                continue;

            IPackageFragment frag = getPackageFragment(JavaCore.create(projects[i]), entry, false);
            if (frag != null)
                result.add(frag);
        }

        return (IPackageFragment[]) result.toArray(new IPackageFragment[result.size()]);
    }

}