ElementTreeValidator.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.motorola.studio.android.wizards.buildingblocks;

import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.ui.wizards.TypedElementSelectionValidator;

import com.motorola.studio.android.common.IAndroidConstants;
import com.motorola.studio.android.common.log.StudioLogger;

/**
 * Class that implements a Validator for the project/package selection 
 * on the New Project Wizard
 */
@SuppressWarnings("restriction")
class ElementTreeValidator extends TypedElementSelectionValidator
{
    private static Class<?>[] acceptedClasses = new Class[]
    {
            IPackageFragmentRoot.class, IJavaProject.class
    };

    public ElementTreeValidator()
    {
        super(acceptedClasses, false);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jdt.internal.ui.wizards.TypedElementSelectionValidator#isSelectedValid(java.lang.Object)
     */
    @Override
    public boolean isSelectedValid(Object element)
    {
        boolean isValid = false;
        try
        {
            if (element instanceof IJavaProject)
            {
                IJavaProject jproject = (IJavaProject) element;
                IPath path = jproject.getProject().getFullPath();
                isValid = (jproject.findPackageFragmentRoot(path) != null);
            }
            else if (element instanceof IPackageFragmentRoot)
            {
                IPackageFragmentRoot packageFragmentRoot = (IPackageFragmentRoot) element;

                boolean isSrc = (packageFragmentRoot.getKind() == IPackageFragmentRoot.K_SOURCE);
                boolean isGen =
                        packageFragmentRoot.getElementName().equals(
                                IAndroidConstants.GEN_SRC_FOLDER)
                                && (packageFragmentRoot.getParent() instanceof IJavaProject);

                isValid = isSrc && !isGen;
            }
            else
            {
                isValid = true;
            }
        }
        catch (JavaModelException e)
        {
            StudioLogger.error(ElementTreeValidator.class, e.getLocalizedMessage(), e);
        }
        return isValid;
    }
}