/*
 * 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.xerces.impl.dv.dtd;

import org.apache.xerces.impl.dv.DatatypeValidator;
import org.apache.xerces.impl.dv.InvalidDatatypeValueException;
import org.apache.xerces.impl.dv.ValidationContext;

/**
 * <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 699892 2008-09-28 21:08:27Z mrglavas $
 */
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});
            
    }
    
}
