idrefdatatypevalidator.java

来自「JAVA的一些源码 JAVA2 STANDARD EDITION DEVELO」· Java 代码 · 共 115 行

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999-2002 The Apache Software Foundation.  All rights 
 * reserved.
 *
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 * modification, are permitted provided that the following conditions
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 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
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 *    distribution.
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 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package com.sun.org.apache.xerces.internal.impl.dv.dtd;

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

/**
 * <P>IDREFDatatypeValidator - represents the IDREFS
 * attribute type from XML 1.0 recommendation. The
 * Value Space of IDREF is the set of all strings
 * that match the NCName production and have been
 * used in an XML Document as the value of an element 
 * or attribute of Type ID. The Lexical space of
 * IDREF is the set of strings that match the NCName
 * production.</P>
 * <P>The Value space of IDREF is scoped to a specific
 * instance document</P>
 * 
 * @author Jeffrey Rodriguez, IBM
 * @author Sandy Gao, IBM
 * 
 * @version $Id: IDREFDatatypeValidator.java,v 1.7 2003/06/05 21:51:32 neilg Exp $
 */
public class IDREFDatatypeValidator implements DatatypeValidator {

    // construct an IDREF datatype validator
    public IDREFDatatypeValidator() {
    }

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

        //Check if is valid key-[81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
        if(context.useNamespaces()) {
            if (!XMLChar.isValidNCName(content)) {
                throw new InvalidDatatypeValueException("IDREFInvalidWithNamespaces", new Object[]{content});
            }
        }
        else {
            if (!XMLChar.isValidName(content)) {
                throw new InvalidDatatypeValueException("IDREFInvalid", new Object[]{content});
            }
        }

        context.addIdRef(content);
        
    }

}