1 /**
2 * Redistribution and use of this software and associated documentation ("Software"), with or
3 * without modification, are permitted provided that the following conditions are met:
4 *
5 * 1. Redistributions of source code must retain copyright statements and notices. Redistributions
6 * must also contain a copy of this document.
7 *
8 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
9 * conditions and the following disclaimer in the documentation and/or other materials provided with
10 * the distribution.
11 *
12 * 3. The name "Exolab" must not be used to endorse or promote products derived from this Software
13 * without prior written permission of Intalio, Inc. For written permission, please contact
14 * info@exolab.org.
15 *
16 * 4. Products derived from this Software may not be called "Exolab" nor may "Exolab" appear in
17 * their names without prior written permission of Intalio, Inc. Exolab is a registered trademark of
18 * Intalio, Inc.
19 *
20 * 5. Due credit should be given to the Exolab Project (http://www.exolab.org/).
21 *
22 * THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESSED OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
24 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTALIO, INC. OR ITS
25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
29 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Copyright 1999-2000 (C) Intalio Inc. All Rights Reserved.
32 *
33 * $Id$
34 */
35
36 package org.exolab.castor.xml.schema;
37
38 import org.exolab.castor.xml.ValidationException;
39
40 /**
41 * Package private class to handles type references.
42 *
43 * @author <a href="mailto:berry@intalio.com">Arnaud Berry</a>
44 * @version $Revision:
45 **/
46 public class TypeReference extends XMLType {
47 /** SerialVersionUID */
48 private static final long serialVersionUID = -8707313918028332092L;
49
50 /**
51 * The referred type (stored in the schema)
52 */
53 private XMLType referredType = null;
54
55 /**
56 * Returns the referred type
57 */
58 XMLType getType() {
59 if (referredType == null)
60 resolveTypeReference();
61
62 return referredType;
63 }
64
65 /**
66 * Resolves the type reference.
67 */
68 void resolveTypeReference() {
69
70 String name = getName();
71 if (name == null)
72 return;
73
74
75 Schema schema = getSchema();
76 if (schema == null) {
77 // -- ummm we have a problem.
78 String error = "Schema is null. Reference cannot be resolved.";
79 throw new IllegalStateException(error);
80 }
81
82 // -- is AnyType? resolve namespace if necessary
83 // -- and check for 'anyType'.
84 String canonicalName = name;
85 String nsPrefix = "";
86 int colon = name.indexOf(':');
87 if (colon >= 0) {
88 canonicalName = name.substring(colon + 1);
89 nsPrefix = name.substring(0, colon);
90 }
91 String ns = schema.getNamespace(nsPrefix);
92
93 if (schema.getSchemaNamespace().equals(ns)) {
94 if (canonicalName.equals(SchemaNames.ANYTYPE)) {
95 referredType = new AnyType(schema);
96 return;
97 }
98 }
99
100
101 // -- check simpletype first since it has higher precedence
102 IllegalArgumentException exception = null;
103 try {
104 referredType = getSchema().getSimpleType(getName());
105 } catch (IllegalArgumentException iax) {
106 exception = iax;
107 }
108 if (referredType != null) {
109 return;
110 }
111
112 // -- try to find a complex type
113 referredType = getSchema().getComplexType(getName());
114
115 if (referredType != null) {
116 return;
117 }
118
119 // -- rethrow exception if necessary
120 if (exception != null)
121 throw exception;
122
123 } // - resolveTypeReference
124
125 /**
126 * Sets the parent for this Schema type
127 *
128 * @param parent the parent Structure for SchemaType
129 **/
130 protected void setParent(Structure parent) {
131 // -- never used by references
132 } // -- setParent
133
134 /**
135 * Returns Structure.UNKNOWN (This class should not be seen outside ElementDecl anyway)
136 **/
137 public short getStructureType() {
138 return Structure.UNKNOWN;
139 } // -- getStructureType
140
141 /**
142 * Checks the validity of this type defintion.
143 *
144 * @throws ValidationException when this type definition is invalid.
145 **/
146 public void validate() throws ValidationException {
147 // -- Do nothing
148
149 } // -- validate
150
151 }
152
153