1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * Copyright 2001-2005 The Apache Software Foundation.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package com.sun.org.apache.xerces.internal.impl.xs.identity;
22
23 import com.sun.org.apache.xerces.internal.impl.xpath.XPathException;
24 import com.sun.org.apache.xerces.internal.impl.xs.util.ShortListImpl;
25 import com.sun.org.apache.xerces.internal.util.SymbolTable;
26 import com.sun.org.apache.xerces.internal.xni.NamespaceContext;
27 import com.sun.org.apache.xerces.internal.xs.ShortList;
28 import com.sun.org.apache.xerces.internal.xs.XSComplexTypeDefinition;
29 import com.sun.org.apache.xerces.internal.xs.XSConstants;
30 import com.sun.org.apache.xerces.internal.xs.XSTypeDefinition;
31
32 /**
33 * Schema identity constraint field.
34 *
35 * @xerces.internal
36 *
37 * @author Andy Clark, IBM
38 */
39 public class Field {
40
41 //
42 // Data
43 //
44
45 /** Field XPath. */
46 protected Field.XPath fXPath;
47
48
49 /** Identity constraint. */
50 protected IdentityConstraint fIdentityConstraint;
51
52 //
53 // Constructors
54 //
55
56 /** Constructs a field. */
57 public Field(Field.XPath xpath,
58 IdentityConstraint identityConstraint) {
59 fXPath = xpath;
60 fIdentityConstraint = identityConstraint;
61 } // <init>(Field.XPath,IdentityConstraint)
62
63 //
64 // Public methods
65 //
66
67 /** Returns the field XPath. */
68 public com.sun.org.apache.xerces.internal.impl.xpath.XPath getXPath() {
69 return fXPath;
70 } // getXPath():com.sun.org.apache.xerces.internal.impl.v1.schema.identity.XPath
71
72 /** Returns the identity constraint. */
73 public IdentityConstraint getIdentityConstraint() {
74 return fIdentityConstraint;
75 } // getIdentityConstraint():IdentityConstraint
76
77 // factory method
78
79 /** Creates a field matcher. */
80 public XPathMatcher createMatcher(FieldActivator activator, ValueStore store) {
81 return new Field.Matcher(fXPath, activator, store);
82 } // createMatcher(ValueStore):XPathMatcher
83
84 //
85 // Object methods
86 //
87
88 /** Returns a string representation of this object. */
89 public String toString() {
90 return fXPath.toString();
91 } // toString():String
92
93 //
94 // Classes
95 //
96
97 /**
98 * Field XPath.
99 *
100 * @author Andy Clark, IBM
101 */
102 public static class XPath
103 extends com.sun.org.apache.xerces.internal.impl.xpath.XPath {
104
105 //
106 // Constructors
107 //
108
109 /** Constructs a field XPath expression. */
110 public XPath(String xpath,
111 SymbolTable symbolTable,
112 NamespaceContext context) throws XPathException {
113 // NOTE: We have to prefix the field XPath with "./" in
114 // order to handle selectors such as "@attr" that
115 // select the attribute because the fields could be
116 // relative to the selector element. -Ac
117 // Unless xpath starts with a descendant node -Achille Fokoue
118 // ... or a / or a . - NG
119 super(((xpath.trim().startsWith("/") ||xpath.trim().startsWith("."))?
120 xpath:"./"+xpath),
121 symbolTable, context);
122
123 // verify that only one attribute is selected per branch
124 for (int i=0;i<fLocationPaths.length;i++) {
125 for(int j=0; j<fLocationPaths[i].steps.length; j++) {
126 com.sun.org.apache.xerces.internal.impl.xpath.XPath.Axis axis =
127 fLocationPaths[i].steps[j].axis;
128 if (axis.type == XPath.Axis.ATTRIBUTE &&
129 (j < fLocationPaths[i].steps.length-1)) {
130 throw new XPathException("c-fields-xpaths");
131 }
132 }
133 }
134 } // <init>(String,SymbolTable,NamespacesContext)
135
136 } // class XPath
137
138 /**
139 * Field matcher.
140 *
141 * @author Andy Clark, IBM
142 */
143 protected class Matcher
144 extends XPathMatcher {
145
146 //
147 // Data
148 //
149
150 /** Field activator. */
151 protected FieldActivator fFieldActivator;
152
153 /** Value store for data values. */
154 protected ValueStore fStore;
155
156 //
157 // Constructors
158 //
159
160 /** Constructs a field matcher. */
161 public Matcher(Field.XPath xpath, FieldActivator activator, ValueStore store) {
162 super(xpath);
163 fFieldActivator = activator;
164 fStore = store;
165 } // <init>(Field.XPath,ValueStore)
166
167 //
168 // XPathHandler methods
169 //
170
171 /**
172 * This method is called when the XPath handler matches the
173 * XPath expression.
174 */
175 protected void matched(Object actualValue, short valueType, ShortList itemValueType, boolean isNil) {
176 super.matched(actualValue, valueType, itemValueType, isNil);
177 if(isNil && (fIdentityConstraint.getCategory() == IdentityConstraint.IC_KEY)) {
178 String code = "KeyMatchesNillable";
179 fStore.reportError(code,
180 new Object[]{fIdentityConstraint.getElementName(), fIdentityConstraint.getIdentityConstraintName()});
181 }
182 fStore.addValue(Field.this, actualValue, convertToPrimitiveKind(valueType), convertToPrimitiveKind(itemValueType));
183 // once we've stored the value for this field, we set the mayMatch
184 // member to false so that, in the same scope, we don't match any more
185 // values (and throw an error instead).
186 fFieldActivator.setMayMatch(Field.this, Boolean.FALSE);
187 } // matched(String)
188
189 private short convertToPrimitiveKind(short valueType) {
190 /** Primitive datatypes. */
191 if (valueType <= XSConstants.NOTATION_DT) {
192 return valueType;
193 }
194 /** Types derived from string. */
195 if (valueType <= XSConstants.ENTITY_DT) {
196 return XSConstants.STRING_DT;
197 }
198 /** Types derived from decimal. */
199 if (valueType <= XSConstants.POSITIVEINTEGER_DT) {
200 return XSConstants.DECIMAL_DT;
201 }
202 /** Other types. */
203 return valueType;
204 }
205
206 private ShortList convertToPrimitiveKind(ShortList itemValueType) {
207 if (itemValueType != null) {
208 int i;
209 final int length = itemValueType.getLength();
210 for (i = 0; i < length; ++i) {
211 short type = itemValueType.item(i);
212 if (type != convertToPrimitiveKind(type)) {
213 break;
214 }
215 }
216 if (i != length) {
217 final short [] arr = new short[length];
218 for (int j = 0; j < i; ++j) {
219 arr[j] = itemValueType.item(j);
220 }
221 for(; i < length; ++i) {
222 arr[i] = convertToPrimitiveKind(itemValueType.item(i));
223 }
224 return new ShortListImpl(arr, arr.length);
225 }
226 }
227 return itemValueType;
228 }
229
230 protected void handleContent(XSTypeDefinition type, boolean nillable, Object actualValue, short valueType, ShortList itemValueType) {
231 if (type == null ||
232 type.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE &&
233 ((XSComplexTypeDefinition) type).getContentType()
234 != XSComplexTypeDefinition.CONTENTTYPE_SIMPLE) {
235
236 // the content must be simpleType content
237 fStore.reportError( "cvc-id.3", new Object[] {
238 fIdentityConstraint.getName(),
239 fIdentityConstraint.getElementName()});
240
241 }
242 fMatchedString = actualValue;
243 matched(fMatchedString, valueType, itemValueType, nillable);
244 } // handleContent(XSElementDecl, String)
245
246 } // class Matcher
247
248 } // class Field