monolipse.core.internal.BooNature.java Source code

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Here is the source code for monolipse.core.internal.BooNature.java

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/*
 * Boo Development Tools for the Eclipse IDE
 * Copyright (C) 2005 Rodrigo B. de Oliveira (rbo@acm.org)
 * 
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */
package monolipse.core.internal;

import java.util.HashMap;
import java.util.Map;

import monolipse.core.foundation.ArrayUtilities;
import monolipse.core.foundation.JavaModelUtilities;

import org.eclipse.core.resources.ICommand;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IProjectNature;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;

public class BooNature implements IProjectNature {

    private IProject _project;

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.core.resources.IProjectNature#configure()
     */
    public void configure() throws CoreException {
        addBuilderTo(_project);
        addExclusionPatternsToSourceFoldersOf(_project);
    }

    private void addExclusionPatternsToSourceFoldersOf(IProject project) throws CoreException {
        IJavaProject javaProject = JavaCore.create(project);
        if (javaProject == null)
            return;
        addExclusionPatternsToSourceFoldersOf(javaProject);
    }

    private void addExclusionPatternsToSourceFoldersOf(IJavaProject javaProject) throws JavaModelException {
        IClasspathEntry[] classpath = javaProject.getRawClasspath();
        Map<IClasspathEntry, IClasspathEntry> modified = addExclusionPatternsTo(classpath);
        if (modified.isEmpty())
            return;
        javaProject.setRawClasspath(replaceModifiedClasspathEntries(classpath, modified), null);
    }

    private IClasspathEntry[] replaceModifiedClasspathEntries(IClasspathEntry[] classpath,
            Map<IClasspathEntry, IClasspathEntry> modifiedEntries) {

        for (int i = 0; i < classpath.length; i++) {
            IClasspathEntry originalEntry = classpath[i];
            IClasspathEntry modified = modifiedEntries.get(originalEntry);
            if (modified != null)
                classpath[i] = modified;
        }
        return classpath;
    }

    private Map<IClasspathEntry, IClasspathEntry> addExclusionPatternsTo(IClasspathEntry[] classpath) {
        Map<IClasspathEntry, IClasspathEntry> modified = new HashMap<IClasspathEntry, IClasspathEntry>();
        for (int i = 0; i < classpath.length; i++) {
            IClasspathEntry entry = classpath[i];
            if (entry.getEntryKind() != IClasspathEntry.CPE_SOURCE)
                continue;

            IPath[] exclusionPatterns = entry.getExclusionPatterns();
            IPath[] newExclusionPatterns = addExclusionPatternsTo(exclusionPatterns);
            if (exclusionPatterns == newExclusionPatterns)
                continue;

            IClasspathEntry newSourceEntry = JavaCore.newSourceEntry(entry.getPath(), entry.getInclusionPatterns(),
                    newExclusionPatterns, entry.getOutputLocation(), entry.getExtraAttributes());

            modified.put(entry, newSourceEntry);
        }
        return modified;
    }

    private IPath[] addExclusionPatternsTo(IPath[] exclusionPatterns) {
        IPath[] newExclusionPatterns = exclusionPatterns;
        for (String pattern : new String[] { "**/.monolipse", "**/*.boo" }) {
            if (!JavaModelUtilities.exclusionPatternsContains(pattern, exclusionPatterns))
                newExclusionPatterns = ArrayUtilities.append(newExclusionPatterns, new Path(pattern));
        }
        return newExclusionPatterns;
    }

    public static void addBuilderTo(IProject project) throws CoreException {
        IProjectDescription desc = project.getDescription();
        ICommand[] commands = desc.getBuildSpec();

        if (hasBuilder(commands))
            return;

        ICommand command = desc.newCommand();
        command.setBuilderName(BooBuilder.BUILDER_ID);

        desc.setBuildSpec((ICommand[]) ArrayUtilities.append(commands, command));
        project.setDescription(desc, null);
    }

    private static boolean hasBuilder(ICommand[] commands) {
        for (int i = 0; i < commands.length; ++i) {
            if (commands[i].getBuilderName().equals(BooBuilder.BUILDER_ID)) {
                return true;
            }
        }
        return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.core.resources.IProjectNature#deconfigure()
     */
    public void deconfigure() throws CoreException {
        IProjectDescription description = getProject().getDescription();
        ICommand[] commands = description.getBuildSpec();
        for (int i = 0; i < commands.length; ++i) {
            if (commands[i].getBuilderName().equals(BooBuilder.BUILDER_ID)) {
                ICommand[] newCommands = new ICommand[commands.length - 1];
                System.arraycopy(commands, 0, newCommands, 0, i);
                System.arraycopy(commands, i + 1, newCommands, i, commands.length - i - 1);
                description.setBuildSpec(newCommands);
                return;
            }
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.core.resources.IProjectNature#getProject()
     */
    public IProject getProject() {
        return _project;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.core.resources.IProjectNature#setProject(org.eclipse.core.resources.IProject)
     */
    public void setProject(IProject project) {
        this._project = project;
    }

}