jaxp/src/java.xml/share/classes/com/sun/org/apache/xerces/internal/impl/dv/dtd/ListDatatypeValidator.java

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 * 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.
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 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package com.sun.org.apache.xerces.internal.impl.dv.dtd;

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

/**
 * For list types: ENTITIES, IDREFS, NMTOKENS.
 *
 * @xerces.internal
 *
 * @author Jeffrey Rodriguez, IBM
 * @author Sandy Gao, IBM
 *
 */
public class ListDatatypeValidator implements DatatypeValidator {

    // the type of items in the list
    DatatypeValidator fItemValidator;

    // construct a list datatype validator
    public ListDatatypeValidator(DatatypeValidator itemDV) {
        fItemValidator = itemDV;
    }

    /**
     * Checks that "content" string is valid.
     * 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 {

        StringTokenizer parsedList = new StringTokenizer(content," ");
        int numberOfTokens =  parsedList.countTokens();
        if (numberOfTokens == 0) {
            throw new InvalidDatatypeValueException("EmptyList", null);
        }
        //Check each token in list against base type
        while (parsedList.hasMoreTokens()) {
            this.fItemValidator.validate(parsedList.nextToken(), context);
        }
    }

}