org.jboss.tools.maven.conversion.ui.internal.jobs.DeleteExistingClasspathEntriesJob.java Source code

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Here is the source code for org.jboss.tools.maven.conversion.ui.internal.jobs.DeleteExistingClasspathEntriesJob.java

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/*************************************************************************************
 * Copyright (c) 2012 Red Hat, 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:
 *     JBoss by Red Hat - Initial implementation.
 ************************************************************************************/
package org.jboss.tools.maven.conversion.ui.internal.jobs;

import java.util.ArrayList;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.m2e.jdt.internal.MavenClasspathHelpers;
import org.jboss.tools.maven.conversion.ui.internal.MavenDependencyConversionActivator;

public class DeleteExistingClasspathEntriesJob extends Job {

    private IProject project;

    public DeleteExistingClasspathEntriesJob(IProject project) {
        super("Delete classpath entries" + ((project == null) ? "" : "for " + project.getName()));
        this.project = project;
    }

    @Override
    protected IStatus run(IProgressMonitor monitor) {
        try {
            if (!project.hasNature(JavaCore.NATURE_ID)) {
                return Status.OK_STATUS;
            }
        } catch (CoreException ignore) {
            return Status.OK_STATUS;
        }
        IJavaProject javaProject = JavaCore.create(project);
        if (javaProject != null) {
            // remove classpatch containers from JavaProject
            try {
                ArrayList<IClasspathEntry> newEntries = new ArrayList<IClasspathEntry>();
                for (IClasspathEntry entry : javaProject.getRawClasspath()) {
                    //Keep Source/ JRE / Maven containers 
                    if (isKept(entry)) {
                        newEntries.add(entry);
                    }
                }
                javaProject.setRawClasspath(newEntries.toArray(new IClasspathEntry[newEntries.size()]), monitor);
            } catch (JavaModelException e) {
                IStatus error = new Status(IStatus.ERROR, MavenDependencyConversionActivator.PLUGIN_ID,
                        "Unable to update classpath", e);
                return error;
            }
        }

        return Status.OK_STATUS;
    }

    private boolean isKept(IClasspathEntry cpe) {
        if (IClasspathEntry.CPE_SOURCE == cpe.getEntryKind() || (IClasspathEntry.CPE_CONTAINER == cpe.getEntryKind()
                && ("org.eclipse.jdt.launching.JRE_CONTAINER".equals(cpe.getPath().segment(0))
                        || MavenClasspathHelpers.isMaven2ClasspathContainer(cpe.getPath())))) {
            return true;
        }
        return false;
    }
}