de.thischwa.pmcms.tool.swt.FileNameVerifier.java Source code

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Here is the source code for de.thischwa.pmcms.tool.swt.FileNameVerifier.java

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/*******************************************************************************
 * Poor Man's CMS (pmcms) - A very basic CMS generating static html pages.
 * http://poormans.sourceforge.net
 * Copyright (C) 2004-2013 by Thilo Schwarz
 * 
 * == BEGIN LICENSE ==
 * 
 * Licensed under the terms of any of the following licenses at your
 * choice:
 * 
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 * 
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 * 
 * == END LICENSE ==
 ******************************************************************************/
package de.thischwa.pmcms.tool.swt;

import org.apache.commons.lang.StringUtils;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.widgets.Text;

import de.thischwa.pmcms.Constants;

/**
 * Verify listener for swt components like {@link Text} to ensure, that the input of a text control only contains numbers, lower cased chars 'a'...'z', '_' and '-'.
 * Used for file base names.
 * 
 * @author Thilo Schwarz
 */
public class FileNameVerifier implements VerifyListener {

    /* (non-Javadoc)
     * @see org.eclipse.swt.events.VerifyListener#verifyText(org.eclipse.swt.events.VerifyEvent)
     */
    @Override
    public void verifyText(VerifyEvent e) {
        String string = e.text;
        char[] chars = new char[string.length()];
        string.getChars(0, chars.length, chars, 0);
        for (char chr : chars) {
            if (!(StringUtils.contains(Constants.ALLOWED_CHARS_FOR_FILES, chr))) {
                e.doit = false;
                return;
            }
        }
    }
}