org.swisspush.gateleen.validation.RegexpValidator Maven / Gradle / Ivy

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package org.swisspush.gateleen.validation;

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


public class RegexpValidator {

    /**
     * Tries to compile the passed regular expression pattern.
     *
     * This method will throw specified exception if passed pattern fails to compile.
     *
     * @param pattern
     *      The pattern to validate.
     * @throws ValidationException
     *      Thrown in case there was a problem compiling passed pattern.
     */
    public static Pattern throwIfPatternInvalid( String pattern ) throws ValidationException {
        try{
            return Pattern.compile( pattern );
        }catch( PatternSyntaxException e ){
            throw new ValidationException( "Failed to parse regex pattern '"+pattern+"'." , e );
        }
    }

}