/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.cocoon.woody.datatype;
import org.outerj.expression.ExpressionContext;
/**
* Interface for validation rules. Most {@link Datatype} implementations will
* perform their validation by checking a number of these validation rules
* (though strictly spoken this is not required).
*
* @version $Id$
*/
public interface ValidationRule {
/**
*
* @param value a value of a class supported by the ValidationRule implementation
* @param expressionContext many validation rules use the xReporter expression interpreter,
* the expressionContext allows to resolve variables used in these expressions.
*/
ValidationError validate(Object value, ExpressionContext expressionContext);
/**
* Returns true if this ValidationRule supports validating objects of the same class
* as the one specified. If the flag 'arrayType' is true, this method will return true
* if this validation rule can validate arrays of these objects (i.e. the object passed
* to the validate method will then be an array).
*/
boolean supportsType(Class clazz, boolean arrayType);
}