org.whole.lang.ui.controls.JavaSourceFolderValidator.java Source code

Introduction

Here is the source code for org.whole.lang.ui.controls.JavaSourceFolderValidator.java

Source

/**
 * Copyright 2004-2014 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.ui.controls;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.ui.dialogs.ISelectionStatusValidator;
import org.whole.lang.e4.ui.E4CompatibilityPlugin;

/**
 * @author Enrico Persiani
 */
public class JavaSourceFolderValidator implements ISelectionStatusValidator {
    private IStatus errorStatus = new Status(IStatus.ERROR, E4CompatibilityPlugin.PLUGIN_ID, IStatus.ERROR, "",
            null);
    private IStatus okStatus = Status.OK_STATUS;

    public IStatus validate(Object[] selection) {
        if (isValid(selection)) {
            return okStatus;
        }
        return errorStatus;
    }

    private boolean isValid(Object[] selection) {
        if (selection.length == 0)
            return false;

        for (int i = 0; i < selection.length; i++) {
            Object element = selection[i];
            if (!isJavaSourceFolder(element)) {
                return false;
            }
        }

        return true;
    }

    private boolean isJavaSourceFolder(Object element) {
        if (!(element instanceof IContainer))
            return false;

        IContainer container = (IContainer) element;
        IProject proj = container.getProject();

        try {
            if (!proj.hasNature(JavaCore.NATURE_ID))
                return false;

            IJavaProject jProject = JavaCore.create(container.getProject());
            if (jProject == null || !jProject.exists())
                return false;

            IPackageFragmentRoot sourceLocation = jProject.getPackageFragmentRoot(container);
            IClasspathEntry cpentry = sourceLocation.getRawClasspathEntry();

            if (cpentry != null && cpentry.getEntryKind() == IClasspathEntry.CPE_SOURCE) {
                return true;
            } else {
                return false;
            }
        } catch (CoreException ex) {
            return false;
        }
    }
}