Struts example source code file (AbstractRangeValidator.java)

This example Struts source code file (AbstractRangeValidator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

abstractrangevalidator, abstractrangevalidator, comparable, comparable, fieldvalidatorsupport, object, object, validationexception, validationexception

The Struts AbstractRangeValidator.java source code

/*
 * Copyright 2002-2006,2009 The Apache Software Foundation.
 * 
 * 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 com.opensymphony.xwork2.validator.validators;

import com.opensymphony.xwork2.validator.ValidationException;


/**
 * Base class for range based validators.
 *
 * @author Jason Carreira
 * @author Cameron Braid
 */
public abstract class AbstractRangeValidator extends FieldValidatorSupport {

    public void validate(Object object) throws ValidationException {
        Object obj = getFieldValue(getFieldName(), object);
        Comparable value = (Comparable) obj;

        // if there is no value - don't do comparison
        // if a value is required, a required validator should be added to the field
        if (value == null) {
            return;
        }

        // only check for a minimum value if the min parameter is set
        if ((getMinComparatorValue() != null) && (value.compareTo(getMinComparatorValue()) < 0)) {
            addFieldError(getFieldName(), object);
        }

        // only check for a maximum value if the max parameter is set
        if ((getMaxComparatorValue() != null) && (value.compareTo(getMaxComparatorValue()) > 0)) {
            addFieldError(getFieldName(), object);
        }
    }

    protected abstract Comparable getMaxComparatorValue();

    protected abstract Comparable getMinComparatorValue();
}