name.martingeisse.esdk.eclipse.EsdkNatureDelegate.java Source code

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Here is the source code for name.martingeisse.esdk.eclipse.EsdkNatureDelegate.java

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/**
 * Copyright (c) 2011 Martin Geisse
 *
 * This file is distributed under the terms of the MIT license.
 */

package name.martingeisse.esdk.eclipse;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

/**
 * TODO: document me
 *
 */
public class EsdkNatureDelegate implements IObjectActionDelegate {

    /**
     * the selection
     */
    private ISelection selection;

    /* (non-Javadoc)
     * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction, org.eclipse.ui.IWorkbenchPart)
     */
    @Override
    public void setActivePart(final IAction action, final IWorkbenchPart targetPart) {
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
     */
    @Override
    public void selectionChanged(final IAction action, final ISelection selection) {
        this.selection = selection;
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
     */
    @Override
    public void run(final IAction action) {
        if (selection instanceof IStructuredSelection) {
            final IStructuredSelection structuredSelection = (IStructuredSelection) selection;
            for (final Object element : structuredSelection.toList()) {
                if (element instanceof IProject) {
                    final IProject project = (IProject) element;
                    if (action.getId()
                            .equals("name.martingeisse.esdk.ProjectPopupMenuContribution.AddEsdkNature")) {
                        addNature(project);
                    } else if (action.getId()
                            .equals("name.martingeisse.esdk.ProjectPopupMenuContribution.RemoveEsdkNature")) {
                        deleteNature(project);
                    } else {
                        Activator.getDefault()
                                .logWarning("EsdkNatureDelegate invoked for unknown action id: " + action.getId());
                    }
                } else {
                    Activator.getDefault()
                            .logWarning("EsdkNatureDelegate invoked for unknown target object: " + element);
                }
            }
        }
    }

    private void addNature(final IProject project) {
        try {
            final IProjectDescription description = project.getDescription();
            final String[] natures = description.getNatureIds();
            final String[] newNatures = new String[natures.length + 1];
            System.arraycopy(natures, 0, newNatures, 0, natures.length);
            newNatures[natures.length] = EsdkNature.NATURE_ID;
            description.setNatureIds(newNatures);
            project.setDescription(description, null);
        } catch (final CoreException e) {
            Activator.getDefault().logError("Could not associate ESDK nature with project " + project.getName(), e);
        }
    }

    private void deleteNature(final IProject project) {
        try {
            final IProjectDescription description = project.getDescription();
            final String[] natures = description.getNatureIds();
            final List<String> newNaturesList = new ArrayList<String>();
            for (String s : natures) {
                if (!s.equals(EsdkNature.NATURE_ID)) {
                    newNaturesList.add(s);
                }
            }
            final String[] newNatures = newNaturesList.toArray(new String[newNaturesList.size()]);
            description.setNatureIds(newNatures);
            project.setDescription(description, null);
        } catch (final CoreException e) {
            Activator.getDefault().logError("Could not de-associate ESDK nature with project " + project.getName(),
                    e);
        }
    }

}