XSDAbstractIDConstraintTraverser


1   /*
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4    *
5    * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
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57  
58  package com.sun.org.apache.xerces.internal.impl.xs.traversers;
59  
60  import com.sun.org.apache.xerces.internal.impl.xs.SchemaSymbols;
61  
62  import  com.sun.org.apache.xerces.internal.util.DOMUtil;
63  import  org.w3c.dom.Element  ;
64  import com.sun.org.apache.xerces.internal.impl.xs.identity.*;
65  import com.sun.org.apache.xerces.internal.impl.xpath.*;
66  
67  /**
68   * This class contains code that all three IdentityConstraint
69   * traversers (the XSDUniqueTraverser, XSDKeyTraverser and
70   * XSDKeyrefTraverser) rely upon.
71   *
72   * @version $Id: XSDAbstractIDConstraintTraverser.java,v 1.8 2003/06/23 16:35:22 neilg Exp $
73   */
74  class XSDAbstractIDConstraintTraverser extends XSDAbstractTraverser {
75  
76      public XSDAbstractIDConstraintTraverser (XSDHandler handler,
77                                    XSAttributeChecker gAttrCheck) {
78          super(handler, gAttrCheck);
79      }
80  
81      void traverseIdentityConstraint(IdentityConstraint ic,
82              Element   icElem, XSDocumentInfo schemaDoc, Object   [] icElemAttrs) {
83  
84          // General Attribute Checking will have been done on icElem by caller
85  
86          // check for <annotation> and get selector
87          Element   sElem = DOMUtil.getFirstChildElement(icElem);
88          if(sElem == null) {
89              reportSchemaError("s4s-elt-must-match.2",
90                                new Object  []{"identity constraint", "(annotation?, selector, field+)"},
91                                icElem);
92              return;
93          }
94  
95          // General Attribute Checking on sElem
96          // first child could be an annotation
97          if (DOMUtil.getLocalName(sElem).equals(SchemaSymbols.ELT_ANNOTATION)) {
98              ic.addAnnotation(traverseAnnotationDecl(sElem, icElemAttrs, false, schemaDoc));
99              sElem = DOMUtil.getNextSiblingElement(sElem);
100         }
101         // if no more children report an error
102         if(sElem == null) {
103             reportSchemaError("s4s-elt-must-match.2", new Object  []{"identity constraint", "(annotation?, selector, field+)"}, icElem);
104             return;
105         }
106         Object   [] attrValues = fAttrChecker.checkAttributes(sElem, false, schemaDoc);
107         
108         // if more than one annotation report an error
109         if(!DOMUtil.getLocalName(sElem).equals(SchemaSymbols.ELT_SELECTOR)) {
110             reportSchemaError("s4s-elt-must-match.1", new Object  []{"identity constraint", "(annotation?, selector, field+)", SchemaSymbols.ELT_SELECTOR}, sElem);
111         }
112         // and make sure <selector>'s content is fine:
113         Element   selChild = DOMUtil.getFirstChildElement(sElem);
114         
115         if (selChild !=null) {
116             // traverse annotation if any
117             if (DOMUtil.getLocalName(selChild).equals(SchemaSymbols.ELT_ANNOTATION)) {
118                 ic.addAnnotation(traverseAnnotationDecl(selChild, attrValues, false, schemaDoc));
119                 selChild = DOMUtil.getNextSiblingElement(selChild);
120             }
121             else {
122                 reportSchemaError("s4s-elt-must-match.1", new Object  []{SchemaSymbols.ELT_SELECTOR, "(annotation?)", DOMUtil.getLocalName(selChild)}, selChild);
123             }
124             if (selChild != null) {
125                 reportSchemaError("s4s-elt-must-match.1", new Object   [] {SchemaSymbols.ELT_SELECTOR, "(annotation?)", DOMUtil.getLocalName(selChild)}, selChild);
126             }
127         }
128 
129         String   sText = ((String  )attrValues[XSAttributeChecker.ATTIDX_XPATH]);
130         if(sText == null) {
131             reportSchemaError("s4s-att-must-appear", new Object   [] {SchemaSymbols.ELT_SELECTOR, SchemaSymbols.ATT_XPATH}, sElem);
132             return;
133         }
134         sText = sText.trim();
135 
136         Selector.XPath sXpath = null;
137         try {
138             sXpath = new Selector.XPath(sText, fSymbolTable,
139                                         schemaDoc.fNamespaceSupport);
140             Selector selector = new Selector(sXpath, ic);
141             ic.setSelector(selector);
142         }
143         catch (XPathException e) {
144             reportSchemaError(e.getKey(), new Object  []{sText}, sElem);
145             // put back attr values...
146             fAttrChecker.returnAttrArray(attrValues, schemaDoc);
147             return;
148         }
149 
150         // put back attr values...
151         fAttrChecker.returnAttrArray(attrValues, schemaDoc);
152 
153         // get fields
154         Element   fElem = DOMUtil.getNextSiblingElement(sElem);
155         if(fElem == null) {
156             reportSchemaError("s4s-elt-must-match.2", new Object  []{"identity constraint", "(annotation?, selector, field+)"}, sElem);
157         }
158         while (fElem != null) {
159             // General Attribute Checking
160             attrValues = fAttrChecker.checkAttributes(fElem, false, schemaDoc);
161 
162             if(!DOMUtil.getLocalName(fElem).equals(SchemaSymbols.ELT_FIELD))
163                 reportSchemaError("s4s-elt-must-match.1", new Object  []{"identity constraint", "(annotation?, selector, field+)", SchemaSymbols.ELT_FIELD}, fElem);
164             
165             // and make sure <field>'s content is fine:
166             Element   fieldChild = DOMUtil.getFirstChildElement(fElem);
167             if (fieldChild != null) {            
168                 // traverse annotation
169                 if (DOMUtil.getLocalName(fieldChild).equals(SchemaSymbols.ELT_ANNOTATION)) {
170                     ic.addAnnotation(traverseAnnotationDecl(fieldChild, attrValues, false, schemaDoc));
171                     fieldChild = DOMUtil.getNextSiblingElement(fieldChild);
172                 }
173             }
174             if (fieldChild != null) {
175                 reportSchemaError("s4s-elt-must-match.1", new Object   [] {SchemaSymbols.ELT_FIELD, "(annotation?)", DOMUtil.getLocalName(fieldChild)}, fieldChild);
176             }
177             String   fText = ((String  )attrValues[XSAttributeChecker.ATTIDX_XPATH]);
178             if(fText == null) {
179                 reportSchemaError("s4s-att-must-appear", new Object   [] {SchemaSymbols.ELT_FIELD, SchemaSymbols.ATT_XPATH}, fElem);
180                 return;
181             }
182             fText = fText.trim();
183             try {
184                 Field.XPath fXpath = new Field.XPath(fText, fSymbolTable,
185                                                      schemaDoc.fNamespaceSupport);
186                 Field field = new Field(fXpath, ic);
187                 ic.addField(field);
188             }
189             catch (XPathException e) {
190                 reportSchemaError(e.getKey(), new Object  []{fText}, fElem);
191                 // put back attr values...
192                 fAttrChecker.returnAttrArray(attrValues, schemaDoc);
193                 return;
194             }
195             fElem = DOMUtil.getNextSiblingElement(fElem);
196             // put back attr values...
197             fAttrChecker.returnAttrArray(attrValues, schemaDoc);
198         }
199 
200     } // traverseIdentityConstraint(IdentityConstraint,Element, XSDocumentInfo)
201 } // XSDAbstractIDConstraintTraverser
202 
203
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