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Java > Open Source Codes > com > mvnforum > jaxb > db > impl > runtime > ValidationContext


1 //
2 // This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v1.0.5-b16-fcs
3 // See <a HREF="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
4 // Any modifications to this file will be lost upon recompilation of the source schema.
5 // Generated on: 2005.12.17 at 09:43:27 AM GMT+07:00
6 //
7
8 package com.mvnforum.jaxb.db.impl.runtime;
9
10 import java.util.HashMap JavaDoc;
11 import java.util.HashSet JavaDoc;
12 import java.util.Iterator JavaDoc;
13 import java.util.Map JavaDoc;
14
15 import javax.xml.bind.ValidationEvent;
16 import javax.xml.bind.ValidationEventHandler;
17 import javax.xml.bind.helpers.NotIdentifiableEventImpl;
18 import javax.xml.bind.helpers.ValidationEventImpl;
19 import javax.xml.bind.helpers.ValidationEventLocatorImpl;
20
21 import org.xml.sax.SAXException JavaDoc;
22
23 import com.sun.xml.bind.ProxyGroup;
24 import com.sun.xml.bind.serializer.AbortSerializationException;
25 import com.sun.xml.bind.validator.Messages;
26
27 /**
28  * Maintains information that needs to be stored across
29  * validations of multiple objects.
30  *
31  * Specifically, this object is responsible for:
32  *
33  * <ol>
34  * <li>detecting a cycle in a content tree by keeping track of
35  * objects that were validated.
36  *
37  * <li>keeping an instance of NamespaceContextImpl, which is
38  * shared by all MSVValidators.
39  *
40  * <li>keeping a reference to {@link ValidationErrorHandler}.
41  * MSVValidators should use this error handler to report any error.
42  * </ol>
43  */
44 class ValidationContext
45 {
46     final DefaultJAXBContextImpl jaxbContext;
47     /**
48      * @param validateID
49      * if true, ID/IDREF validation will be performed.
50      */
51     ValidationContext( DefaultJAXBContextImpl _context, ValidationEventHandler _eventHandler, boolean validateID ) {
52         this.jaxbContext = _context;
53         this.eventHandler = _eventHandler;
54         this.validateID = validateID;
55     }
56     
57
58     
59 //
60 //
61 // detecting cycles.
62 //
63 //
64
65     /** Set of all validated objects. Used to detect a cycle. */
66     private final IdentityHashSet validatedObjects = new IdentityHashSet();
67     
68     /**
69      * Validates the sub-tree rooted at <code>vo</code> and reports
70      * any errors/warnings to the error handler.
71      */
72     public void validate( ValidatableObject vo ) throws SAXException JavaDoc {
73         if( validatedObjects.add(ProxyGroup.unwrap(vo)) ) {
74             // setup a new validator for this object and validate it.
75 MSVValidator.validate(jaxbContext,this,vo);
76         } else {
77             // this object has already been validated once.
78 reportEvent( vo, Messages.format( Messages.CYCLE_DETECTED ) );
79         }
80     }
81
82     
83 //
84 //
85 // Keeping track of namespace bindings.
86 //
87 //
88
89     /** namespace context. */
90     private final NamespaceContextImpl nsContext = new NamespaceContextImpl(null);
91     
92     public NamespaceContextImpl getNamespaceContext() { return nsContext; }
93     
94
95 //
96 //
97 // ID/IDREF validation
98 //
99 //
100 /** ID/IDREF validation is done only when this flag is true. */
101     private final boolean validateID;
102     
103     private final HashSet JavaDoc IDs = new HashSet JavaDoc();
104     private final HashMap JavaDoc IDREFs = new HashMap JavaDoc();
105     
106     public String JavaDoc onID( XMLSerializable owner, String JavaDoc value ) throws SAXException JavaDoc {
107             
108         if(!validateID) return value;
109         
110         if(!IDs.add(value)) {
111             // this ID value has already been used.
112 //reportEvent(Util.toValidatableObject(owner),
113 // Messages.format(Messages.DUPLICATE_ID,value));
114 reportEvent(jaxbContext.getGrammarInfo().castToValidatableObject(owner),
115                 Messages.format(Messages.DUPLICATE_ID,value));
116         }
117         
118         return value;
119     }
120     public String JavaDoc onIDREF( XMLSerializable referer, String JavaDoc value ) throws SAXException JavaDoc {
121         if(!validateID) return value;
122         
123         if(IDs.contains(value))
124             return value; // this IDREF has the corresponding ID.
125
126         // remember the value to check the value later.
127 IDREFs.put(value,referer);
128         
129         return value;
130     }
131     /** Tests if all IDREFs have corresponding IDs. */
132     protected void reconcileIDs() throws SAXException JavaDoc {
133         if(!validateID) return;
134         
135         for (Iterator JavaDoc itr = IDREFs.entrySet().iterator(); itr.hasNext();) {
136             Map.Entry JavaDoc e = (Map.Entry JavaDoc) itr.next();
137             
138             if(IDs.contains(e.getKey()))
139                 continue; // OK.
140
141             // ID was not found.
142 ValidatableObject source = (ValidatableObject)e.getValue();
143             reportEvent(
144                 source,
145                 new NotIdentifiableEventImpl(
146                     ValidationEvent.ERROR,
147                     Messages.format( Messages.ID_NOT_FOUND, e.getKey() ),
148                     new ValidationEventLocatorImpl( source ) ) );
149         }
150         
151         IDREFs.clear();
152     }
153
154     
155 //
156 //
157 // Keeping track of ValidationErrorHandler
158 //
159 //
160 private final ValidationEventHandler eventHandler;
161     
162     /**
163      * Reports an error to the application.
164      */
165     public void reportEvent(ValidatableObject source, String JavaDoc formattedMessage) throws AbortSerializationException {
166         reportEvent(
167             source,
168             new ValidationEventImpl( ValidationEvent.ERROR,
169                                      formattedMessage,
170                                      new ValidationEventLocatorImpl(source) ) );
171     }
172     
173     /**
174      * Reports an error to the client.
175      * This version should be used when an exception is thrown from sub-modules.
176      */
177     public void reportEvent(ValidatableObject source, Exception JavaDoc nestedException ) throws AbortSerializationException {
178         reportEvent(
179             source,
180             new ValidationEventImpl( ValidationEvent.ERROR,
181                                      nestedException.toString(),
182                                      new ValidationEventLocatorImpl(source),
183                                      nestedException ) );
184     }
185     
186     public void reportEvent( ValidatableObject source, ValidationEvent event ) throws AbortSerializationException {
187         boolean r;
188         
189         try {
190             r = eventHandler.handleEvent( event );
191         } catch( RuntimeException JavaDoc re ) {
192             // if the client event handler causes a RuntimeException, then
193 // we have to return false.
194 r = false;
195         }
196         
197         if(!r) {
198             // throw an exception to abort validation
199 throw new AbortSerializationException( event.getMessage() );
200         }
201     }
202         
203     
204
205 }
206
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