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Java > Open Source Codes > com > sun > org > apache > xerces > internal > impl > dv > dtd > IDREFDatatypeValidator


1 /*
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5  * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
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50  * This software consists of voluntary contributions made by many
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52  * originally based on software copyright (c) 1999, International
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57
58 package com.sun.org.apache.xerces.internal.impl.dv.dtd;
59
60 import com.sun.org.apache.xerces.internal.impl.dv.*;
61 import com.sun.org.apache.xerces.internal.util.XMLChar;
62
63 /**
64  * <P>IDREFDatatypeValidator - represents the IDREFS
65  * attribute type from XML 1.0 recommendation. The
66  * Value Space of IDREF is the set of all strings
67  * that match the NCName production and have been
68  * used in an XML Document as the value of an element
69  * or attribute of Type ID. The Lexical space of
70  * IDREF is the set of strings that match the NCName
71  * production.</P>
72  * <P>The Value space of IDREF is scoped to a specific
73  * instance document</P>
74  *
75  * @author Jeffrey Rodriguez, IBM
76  * @author Sandy Gao, IBM
77  *
78  * @version $Id: IDREFDatatypeValidator.java,v 1.7 2003/06/05 21:51:32 neilg Exp $
79  */
80 public class IDREFDatatypeValidator implements DatatypeValidator {
81
82     // construct an IDREF datatype validator
83 public IDREFDatatypeValidator() {
84     }
85
86     /**
87      * Checks that "content" string is valid IDREF value.
88      * If invalid a Datatype validation exception is thrown.
89      *
90      * @param content the string value that needs to be validated
91      * @param context the validation context
92      * @throws InvalidDatatypeException if the content is
93      * invalid according to the rules for the validators
94      * @see InvalidDatatypeValueException
95      */
96     public void validate(String JavaDoc content, ValidationContext context) throws InvalidDatatypeValueException {
97
98         //Check if is valid key-[81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
99 if(context.useNamespaces()) {
100             if (!XMLChar.isValidNCName(content)) {
101                 throw new InvalidDatatypeValueException("IDREFInvalidWithNamespaces", new Object JavaDoc[]{content});
102             }
103         }
104         else {
105             if (!XMLChar.isValidName(content)) {
106                 throw new InvalidDatatypeValueException("IDREFInvalid", new Object JavaDoc[]{content});
107             }
108         }
109
110         context.addIdRef(content);
111         
112     }
113
114 }
115
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