/*
* Copyright 2004-2005 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.annotation.handler;
import java.lang.annotation.Annotation;
import org.springframework.util.Assert;
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;
/**
* An {@link AbstractPropertyValidationAnnotationHandler} implementation that handles {@link Length} annotations.
*
* @author Uri Boness
*/
public class LengthValidationAnnotationHandler extends AbstractPropertyValidationAnnotationHandler {
/**
* Constructs a new LengthValidationAnnotationHandler.
*/
public LengthValidationAnnotationHandler() {
super(Length.class, MinLength.class, MaxLength.class);
}
protected AbstractValidationRule createValidationRule(Annotation annotation, Class clazz, String propertyName) {
if (Length.class.isInstance(annotation)) {
Length length = (Length) annotation;
validateMinMax(length.min(), length.max(), clazz, propertyName);
return new LengthValidationRule(length.min(), length.max());
}
if (MinLength.class.isInstance(annotation)) {
MinLength minLength = (MinLength) annotation;
validateMin(minLength.value(), clazz, propertyName);
return new MinLengthValidationRule(minLength.value());
}
if (MaxLength.class.isInstance(annotation)) {
MaxLength maxLength = (MaxLength) annotation;
validateMax(maxLength.value(), clazz, propertyName);
return new MaxLengthValidationRule(maxLength.value());
}
throw new IllegalArgumentException("LengthValidationAnnotationHandler does not suppport annotations of type: " +
annotation.getClass().getName());
}
protected void validateMinMax(int min, int max, Class clazz, String propertyName) {
Assert.isTrue(max >= 0, "@Length annotation on property '" + clazz.getName() + "." + propertyName +
"' is mal-configured - 'max' attribute cannot hold a negative value");
Assert.isTrue(min >= 0, "@Length annotation on property '" + clazz.getName() + "." + propertyName +
"' is mal-configured - 'min' attribute cannot hold a negative value");
Assert.isTrue(max >= min, "@Length annotation on property '" + clazz.getName() + "." + propertyName +
"' is mal-configured - 'max' attribute is smaller than 'min'");
}
protected void validateMax(int max, Class clazz, String propertyName) {
Assert.isTrue(max >= 0, "@Length annotation on property '" + clazz.getName() + "." + propertyName +
"' is mal-configured - 'max' attribute cannot hold a negative value");
}
protected void validateMin(int min, Class clazz, String propertyName) {
Assert.isTrue(min >= 0, "@Length annotation on property '" + clazz.getName() + "." + propertyName +
"' is mal-configured - 'min' attribute cannot hold a negative value");
}
}