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XMLTooling-J is a low-level library that may be used to construct libraries that allow developers to work with XML in a Java beans manner.

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/*
 * Licensed to the University Corporation for Advanced Internet Development, 
 * Inc. (UCAID) under one or more contributor license agreements.  See the 
 * NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The UCAID 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.opensaml.xml.validation;

import java.util.List;

import org.opensaml.xml.XMLObject;

/**
 * A functional interface for XMLObjects that offer the ability
 * to evaluate validation rules.
 */
public interface ValidatingXMLObject extends XMLObject{

    /**
     * Gets the list of validators for this XMLObject or null if there is no list.
     * 
     * @return the list of validators for this XMLObject
     */
    public List getValidators();
    
    /**
     * Registers a validator for this XMLObject.
     * 
     * @param validator the validator
     */
    public void registerValidator(Validator validator);
    
    /**
     * Deregisters a validator for this XMLObject.
     * 
     * @param validator the validator
     */
    public void deregisterValidator(Validator validator);
    
    /**
     * Validates this XMLObject against all registered validators.
     * 
     * @param validateDescendants true if all the descendants of this object should 
     * be validated as well, false if not
     * 
     * @throws ValidationException thrown if the element is not valid
     */
    public void validate(boolean validateDescendants) throws ValidationException;
}