org.kalypso.commons.databinding.validation.StringRegexValidator.java Source code

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Here is the source code for org.kalypso.commons.databinding.validation.StringRegexValidator.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 * 
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 * 
 *  and
 *  
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 * 
 *  This library 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 2.1 of the License, or (at your option) any later version.
 * 
 *  This library 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 this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Contact:
 * 
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *   
 *  ---------------------------------------------------------------------------*/
package org.kalypso.commons.databinding.validation;

import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

import org.apache.commons.lang3.StringUtils;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.kalypso.commons.KalypsoCommonsPlugin;
import org.kalypso.commons.internal.i18n.Messages;

/**
 * This validator checks, if a regular expression can be compiled.
 * 
 * @author Holger Albert
 */
public class StringRegexValidator extends TypedValidator<String> {
    /**
     * @param severity
     *          Severity of IStatus, will be used to create validation failures.
     * @param message
     *          Will be used as message for a status, if validation fails.
     */
    public StringRegexValidator(final int severity, final String message) {
        super(String.class, severity, message);
    }

    @Override
    protected IStatus doValidate(final String value) {
        try {
            if (value == null || value.length() == 0)
                throw new PatternSyntaxException(Messages.getString("StringRegexValidator_0"), StringUtils.EMPTY, //$NON-NLS-1$
                        -1);

            Pattern.compile(value);
            return Status.OK_STATUS;
        } catch (final PatternSyntaxException ex) {
            return new Status(IStatus.ERROR, KalypsoCommonsPlugin.getID(),
                    String.format(Messages.getString("StringRegexValidator_1"), ex.getLocalizedMessage()), ex); //$NON-NLS-1$
        }
    }
}