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/*
* Copyright 2013-2014 Richard M. Hightower
* 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.
*
* __________ _____ __ .__
* \______ \ ____ ____ ____ /\ / \ _____ | | _|__| ____ ____
* | | _// _ \ / _ \ / \ \/ / \ / \\__ \ | |/ / |/ \ / ___\
* | | ( <_> | <_> ) | \ /\ / Y \/ __ \| <| | | \/ /_/ >
* |______ /\____/ \____/|___| / \/ \____|__ (____ /__|_ \__|___| /\___ /
* \/ \/ \/ \/ \/ \//_____/
* ____. ___________ _____ ______________.___.
* | |____ ___ _______ \_ _____/ / _ \ / _____/\__ | |
* | \__ \\ \/ /\__ \ | __)_ / /_\ \ \_____ \ / | |
* /\__| |/ __ \\ / / __ \_ | \/ | \/ \ \____ |
* \________(____ /\_/ (____ / /_______ /\____|__ /_______ / / ______|
* \/ \/ \/ \/ \/ \/
*/
package org.boon.validation.validators;
import org.boon.validation.ValidationContext;
import org.boon.validation.ValidatorMessage;
import org.boon.validation.ValidatorMessageHolder;
/**
*
*
* AbstractCompareValidator is the base class for all validators that compare
* two values to perform validation.
*
* Future versions of this class will deal with other values besides
* simple properties like expressions.
*
* AbstractCompareValidator
*
*
*
* @author Rick Hightower
*/
public abstract class AbstractCompareValidator extends BaseValidator {
/**
* Holds the name of the variable we are getting out of the validation
* context. This variable could be another property.
*/
private String compareToProperty;
/**
*
*/
public ValidatorMessageHolder validate( Object value, String fieldLabel ) {
/* Create the validator message. */
ValidatorMessage message = new ValidatorMessage();
if ( value == null ) {
return message;
}
/* Get the comparison value. */
Object compareToPropertyValue = lookupCompareToPropertyValue();
/* Check to see if this is valid. */
boolean valid = checkValidity( value, compareToPropertyValue );
/* If it is not valid, then populate the message and
* return it regardless.
*/
if ( !valid ) {
populateMessage( message, fieldLabel );
}
return message;
}
/**
* Check Validity of the value compared to the property value.
* This class uses the jstl design pattern. Subclasses are suppose
* to override this method and this class uses IoC to delegate
* validity checking to the subclass.
*
* @param object
* @param compareToPropertyValue
* @return
*/
protected abstract boolean checkValidity( Object object,
Object compareToPropertyValue );
/**
* This method looks of the ValidationContext to get the
* compareToProperty.
*
* @return
*/
protected Object lookupCompareToPropertyValue() {
return ValidationContext.getCurrentInstance()
.getProposedPropertyValue( compareToProperty );
}
/**
* @param compareToProperty
*/
public void setCompareToProperty( String compareToProperty ) {
this.compareToProperty = compareToProperty;
}
protected String getCompareToProperty() {
return compareToProperty;
}
}