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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.schema.validator;

import org.opensaml.xml.schema.XSDateTime;
import org.opensaml.xml.validation.ValidationException;
import org.opensaml.xml.validation.Validator;

/**
 * Checks {@link org.opensaml.xml.schema.XSDateTime} for Schema compliance. 
 * 
 * @param  the type to be validated
 */
public class XSDateTimeSchemaValidator implements Validator {
    /** Flag specifying whether empty element content should be allowed. */
    private boolean allowEmptyContent;
    
    /**
     * Constructor.
     *
     * @param allowEmptyContent flag indicated whether empty content should be allowed
     */
    public XSDateTimeSchemaValidator(boolean allowEmptyContent) {
        this.allowEmptyContent = allowEmptyContent;
    }

    /** Constructor. */
    public XSDateTimeSchemaValidator(){
        allowEmptyContent = false;
    }

    /**
     * Get the flag which determines whether empty content should be allowed.
     * 
     * @return true if empty content should be allowed, false otherwise
     */
    protected boolean isAllowEmptyContent() {
        return allowEmptyContent;
    }

    /** {@inheritDoc} */
    public void validate(T xmlObject) throws ValidationException {
        validateDateTimeContent(xmlObject);
    }
    
    /**
     * Validates the content of the XSDateTime object.
     * 
     * @param xmlObject the object to evaluate
     * @throws ValidationException thrown if the content of the object is invalid
     */
    protected void validateDateTimeContent(T xmlObject) throws ValidationException{
        if(!allowEmptyContent && xmlObject.getValue() == null){
            throw new ValidationException("dateTime content may not be empty");
        }
    }

}