/*
 * Copyright 1999-2002,2004 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.sun.org.apache.xerces.internal.impl.dv.dtd;

import com.sun.org.apache.xerces.internal.impl.dv.*;

/**
 * <P>ENTITYDatatypeValidator implements the
 * DatattypeValidator interface.
 * This validator embodies the ENTITY attribute type
 * from XML1.0 recommendation.
 * The Value space of ENTITY is the set of all strings
 * that match the NCName production and have been
 * declared as an unparsed entity in a document
 * type definition.
 * The Lexical space of Entity is the set of all
 * strings that match the NCName production.
 * The value space of ENTITY is scoped to a specific
 * instance document.</P>
 * 
 * @xerces.internal  
 *
 * @author Jeffrey Rodriguez, IBM
 * @author Sandy Gao, IBM
 * 
 * @version $Id: ENTITYDatatypeValidator.java,v 1.2.6.1 2005/09/09 07:19:17 neerajbj Exp $
 */
public class ENTITYDatatypeValidator implements DatatypeValidator {

    // construct an ENTITY datatype validator
    public ENTITYDatatypeValidator() {
    }

    /**
     * Checks that "content" string is valid ID value.
     * If invalid a Datatype validation exception is thrown.
     * 
     * @param content       the string value that needs to be validated
     * @param context       the validation context
     * @throws InvalidDatatypeException if the content is
     *         invalid according to the rules for the validators
     * @see InvalidDatatypeValueException
     */
    public void validate(String content, ValidationContext context) throws InvalidDatatypeValueException {

        if (!context.isEntityUnparsed(content))
            throw new InvalidDatatypeValueException("ENTITYNotUnparsed", new Object[]{content});
            
    }
    
}