/*
* Copyright 2004-2009 the original author or authors.
*
* 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.springmodules.validation.bean.conf.loader.xml.handler;
import org.springframework.util.StringUtils;
import org.springmodules.validation.bean.conf.ValidationConfigurationException;
import org.springmodules.validation.bean.rule.AbstractValidationRule;
import org.springmodules.validation.bean.rule.LengthValidationRule;
import org.springmodules.validation.bean.rule.MaxLengthValidationRule;
import org.springmodules.validation.bean.rule.MinLengthValidationRule;
import org.w3c.dom.Element;
/**
* An {@link AbstractPropertyValidationElementHandler} that can handle an element that represents a length range validation rule,
* min length validation rule, or max length vaidation rule.
*
* @author Uri Boness
*/
public class LengthRuleElementHandler extends AbstractPropertyValidationElementHandler {
private static final String ELEMENT_NAME = "length";
private static final String MIN_ATTR = "min";
private static final String MAX_ATTR = "max";
/**
* Constructs a new LengthRuleElementHandler.
*/
public LengthRuleElementHandler(String namespaceUri) {
super(ELEMENT_NAME, namespaceUri);
}
protected AbstractValidationRule createValidationRule(Element element) {
String minText = element.getAttribute(MIN_ATTR);
String maxText = element.getAttribute(MAX_ATTR);
Integer min = (StringUtils.hasText(minText)) ? new Integer(minText) : null;
Integer max = (StringUtils.hasText(maxText)) ? new Integer(maxText) : null;
if (min != null && max != null) {
return new LengthValidationRule(min.intValue(), max.intValue());
}
if (min != null) {
return new MinLengthValidationRule(min.intValue());
}
if (max != null) {
return new MaxLengthValidationRule(max.intValue());
}
throw new ValidationConfigurationException("Element '" + ELEMENT_NAME +
"' must have either 'min' attribute, 'max' attribute, or both");
}
}