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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2014 Volker Bergmann ([email protected]).
* All rights reserved.
*
* 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 org.databene.commons.validator;
import org.databene.commons.Converter;
import org.databene.commons.Validator;
import org.databene.commons.converter.SubstringExtractor;
/**
* Uses another validator to validate sub strings.
* Created: 02.08.2011 07:19:04
* @since 0.5.9
* @author Volker Bergmann
*/
public class SubStringValidator extends AbstractValidator {
protected Converter substringExtractor;
protected Validator realValidator;
public SubStringValidator(int from, Integer to, Validator realValidator) {
this.substringExtractor = new SubstringExtractor(from, to);
this.realValidator = realValidator;
}
@Override
public boolean valid(String value) {
if (value == null)
return false;
return realValidator.valid(substringExtractor.convert(value));
}
}