FileSelectionValidator.java

/*******************************************************************************
 * Copyright (c) 2007 Spring IDE Developers
 * 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:
 *     Spring IDE Developers - initial API and implementation
 *******************************************************************************/
package org.springframework.ide.eclipse.webflow.ui.properties;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.ui.dialogs.ISelectionStatusValidator;
import org.springframework.ide.eclipse.webflow.ui.Activator;

/**
 * Validates the selection if only files are selected.
 * @author Christian Dupuis
 */
public class FileSelectionValidator implements ISelectionStatusValidator {

    /**
     * 
     */
    private boolean multiSelect;

    /**
     * Creates a new instance of the validator.
     * 
     * @param multiSelect <code>true</code> if multi selection is allowed.
     * <code>false</code> if only single selection is allowed.
     */
    public FileSelectionValidator(boolean multiSelect) {
        this.multiSelect = multiSelect;
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.dialogs.ISelectionStatusValidator#validate(java.lang.Object[])
     */
    public IStatus validate(Object[] selection) {
        int selected = selection.length;
        if (selected == 0 || (selected > 1 && multiSelect == false)) {
            return createStatus(IStatus.ERROR);
        }
        for (int i = 0; i < selected; i++) {
            if (!(selection[i] instanceof IFile)) {
                return createStatus(IStatus.ERROR);
            }
        }
        return createStatus(IStatus.OK);
    }

    /**
     * 
     * 
     * @param code 
     * 
     * @return 
     */
    private static IStatus createStatus(int code) {
        return new Status(code, Activator.PLUGIN_ID, IStatus.OK, "", null);
    }
}