Source Code Cross Referenced for FixedAttribute.java in  » XML » XPath-Saxon » net » sf » saxon » instruct » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » XPath Saxon » net.sf.saxon.instruct 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package net.sf.saxon.instruct;
002:
003:        import net.sf.saxon.Controller;
004:        import net.sf.saxon.Err;
005:        import net.sf.saxon.event.ReceiverOptions;
006:        import net.sf.saxon.event.SequenceReceiver;
007:        import net.sf.saxon.expr.*;
008:        import net.sf.saxon.om.Item;
009:        import net.sf.saxon.om.NamePool;
010:        import net.sf.saxon.om.Orphan;
011:        import net.sf.saxon.om.Validation;
012:        import net.sf.saxon.pattern.NodeKindTest;
013:        import net.sf.saxon.style.StandardNames;
014:        import net.sf.saxon.trace.InstructionInfo;
015:        import net.sf.saxon.trace.Location;
016:        import net.sf.saxon.trans.DynamicError;
017:        import net.sf.saxon.trans.StaticError;
018:        import net.sf.saxon.trans.XPathException;
019:        import net.sf.saxon.type.*;
020:        import net.sf.saxon.value.AtomicValue;
021:        import net.sf.saxon.value.StringValue;
022:
023:        import java.io.PrintStream;
024:
025:        /**
026:         * An instruction derived from an xsl:attribute element in stylesheet, or from
027:         * an attribute constructor in XQuery. This version deals only with attributes
028:         * whose name is known at compile time. It is also used for attributes of
029:         * literal result elements. The value of the attribute is in general computed
030:         * at run-time.
031:         */
032:
033:        public final class FixedAttribute extends SimpleNodeConstructor {
034:
035:            private int nameCode;
036:            private SimpleType schemaType;
037:            private int annotation;
038:            private int options;
039:            private int validationAction;
040:
041:            /**
042:             * Construct an Attribute instruction
043:             * @param nameCode Represents the attribute name
044:             * @param annotation Integer code identifying the type named in the <code>type</code> attribute
045:             * of the instruction - zero if the attribute was not present
046:             */
047:
048:            public FixedAttribute(int nameCode, int validationAction,
049:                    SimpleType schemaType, int annotation) {
050:                this .nameCode = nameCode;
051:                this .schemaType = schemaType;
052:                if (annotation == -1) {
053:                    this .annotation = StandardNames.XDT_UNTYPED_ATOMIC;
054:                } else {
055:                    this .annotation = annotation;
056:                }
057:                this .validationAction = validationAction;
058:                this .options = 0;
059:            }
060:
061:            /**
062:             * Get the name of this instruction (return 'xsl:attribute')
063:             */
064:
065:            public int getInstructionNameCode() {
066:                return StandardNames.XSL_ATTRIBUTE;
067:            }
068:
069:            /**
070:             * Indicate that two attributes with the same name are not acceptable.
071:             * (This option is set in XQuery, but not in XSLT)
072:             */
073:
074:            public void setRejectDuplicates() {
075:                this .options |= ReceiverOptions.REJECT_DUPLICATES;
076:            }
077:
078:            /**
079:             * Indicate that the attribute value contains no special characters that
080:             * might need escaping
081:             */
082:
083:            public void setNoSpecialChars() {
084:                this .options |= ReceiverOptions.NO_SPECIAL_CHARS;
085:            }
086:
087:            /**
088:             * Set the expression defining the value of the attribute. If this is a constant, and if
089:             * validation against a schema type was requested, the validation is done immediately.
090:             * @param select The expression defining the content of the attribute
091:             * @throws StaticError if the expression is a constant, and validation is requested, and
092:             * the constant doesn't match the required type.
093:             */
094:            public void setSelect(Expression select) throws StaticError {
095:                super .setSelect(select);
096:
097:                // Attempt early validation if possible
098:                if (select instanceof  AtomicValue && schemaType != null
099:                        && !schemaType.isNamespaceSensitive()) {
100:                    CharSequence value = ((AtomicValue) select)
101:                            .getStringValueCS();
102:                    XPathException err = schemaType
103:                            .validateContent(value, DummyNamespaceResolver
104:                                    .getInstance(), getExecutable()
105:                                    .getConfiguration().getNameChecker());
106:                    if (err != null) {
107:                        throw new StaticError("Attribute value "
108:                                + Err.wrap(value, Err.VALUE)
109:                                + " does not the match the required type "
110:                                + schemaType.getDescription() + ". "
111:                                + err.getMessage());
112:                    }
113:                }
114:
115:                // If value is fixed, test whether there are any special characters that might need to be
116:                // escaped when the time comes for serialization
117:                if (select instanceof  StringValue) {
118:                    boolean special = false;
119:                    CharSequence val = ((StringValue) select)
120:                            .getStringValueCS();
121:                    for (int k = 0; k < val.length(); k++) {
122:                        char c = val.charAt(k);
123:                        if ((int) c < 33 || (int) c > 126 || c == '<'
124:                                || c == '>' || c == '&' || c == '\"') {
125:                            special = true;
126:                            break;
127:                        }
128:                    }
129:                    if (!special) {
130:                        this .options |= ReceiverOptions.NO_SPECIAL_CHARS;
131:                    }
132:                }
133:            }
134:
135:            public InstructionInfo getInstructionInfo() {
136:                InstructionDetails details = (InstructionDetails) super 
137:                        .getInstructionInfo();
138:                details.setConstructType(Location.LITERAL_RESULT_ATTRIBUTE);
139:                details.setObjectNameCode(nameCode);
140:                return details;
141:            }
142:
143:            public ItemType getItemType(TypeHierarchy th) {
144:                return NodeKindTest.ATTRIBUTE;
145:            }
146:
147:            public int getCardinality() {
148:                return StaticProperty.EXACTLY_ONE;
149:            }
150:
151:            public void localTypeCheck(StaticContext env,
152:                    ItemType contextItemType) {
153:            }
154:
155:            protected int evaluateNameCode(XPathContext context) {
156:                return nameCode;
157:            }
158:
159:            /**
160:             * Check that any elements and attributes constructed or returned by this expression are acceptable
161:             * in the content model of a given complex type. It's always OK to say yes, since the check will be
162:             * repeated at run-time. The process of checking element and attribute constructors against the content
163:             * model of a complex type also registers the type of content expected of those constructors, so the
164:             * static validation can continue recursively.
165:             */
166:
167:            public void checkPermittedContents(SchemaType parentType,
168:                    StaticContext env, boolean whole) throws XPathException {
169:                int fp = nameCode & NamePool.FP_MASK;
170:                if (fp == StandardNames.XSI_TYPE
171:                        || fp == StandardNames.XSI_SCHEMA_LOCATION
172:                        || fp == StandardNames.XSI_NIL
173:                        || fp == StandardNames.XSI_NO_NAMESPACE_SCHEMA_LOCATION) {
174:                    return;
175:                }
176:                if (parentType instanceof  SimpleType) {
177:                    StaticError err = new StaticError(
178:                            "Attribute "
179:                                    + env.getNamePool()
180:                                            .getDisplayName(nameCode)
181:                                    + " is not permitted in the content model of the simple type "
182:                                    + parentType.getDescription());
183:                    err.setIsTypeError(true);
184:                    err.setLocator(this );
185:                    throw err;
186:                }
187:                SchemaType type;
188:                try {
189:                    type = ((ComplexType) parentType).getAttributeUseType(fp);
190:                } catch (SchemaException e) {
191:                    throw new StaticError(e);
192:                }
193:                if (type == null) {
194:                    StaticError err = new StaticError(
195:                            "Attribute "
196:                                    + env.getNamePool()
197:                                            .getDisplayName(nameCode)
198:                                    + " is not permitted in the content model of the complex type "
199:                                    + parentType.getDescription());
200:                    err.setIsTypeError(true);
201:                    err.setLocator(this );
202:                    throw err;
203:                }
204:                if (type instanceof  AnyType) {
205:                    return;
206:                }
207:
208:                try {
209:                    select.checkPermittedContents(type, env, true);
210:                    // TODO: does this allow for the fact that the content will be atomized?
211:                } catch (XPathException e) {
212:                    if (e.getLocator() == null || e.getLocator() == e) {
213:                        e.setLocator(this );
214:                    }
215:                    throw e;
216:                }
217:            }
218:
219:            /**
220:             * Process this instruction
221:             * @param context the dynamic context of the transformation
222:             * @return a TailCall to be executed by the caller, always null for this instruction
223:             */
224:
225:            public TailCall processLeavingTail(XPathContext context)
226:                    throws XPathException {
227:                Controller controller = context.getController();
228:                SequenceReceiver out = context.getReceiver();
229:                int opt = options;
230:                int ann = annotation;
231:
232:                // we may need to change the namespace prefix if the one we chose is
233:                // already in use with a different namespace URI: this is done behind the scenes
234:                // by the Outputter
235:
236:                String value = expandChildren(context).toString();
237:                if (schemaType != null) {
238:                    // test whether the value actually conforms to the given type
239:                    XPathException err = schemaType.validateContent(value,
240:                            DummyNamespaceResolver.getInstance(), context
241:                                    .getConfiguration().getNameChecker());
242:                    if (err != null) {
243:                        ValidationException verr = new ValidationException(
244:                                "Attribute value "
245:                                        + Err.wrap(value, Err.VALUE)
246:                                        + " does not the match the required type "
247:                                        + schemaType.getDescription() + ". "
248:                                        + err.getMessage());
249:                        verr.setLocator(this );
250:                        throw verr;
251:                    }
252:                } else if (validationAction == Validation.STRICT
253:                        || validationAction == Validation.LAX) {
254:                    try {
255:                        ann = controller.getConfiguration().validateAttribute(
256:                                nameCode, value, validationAction);
257:                    } catch (ValidationException e) {
258:                        DynamicError err = DynamicError.makeDynamicError(e);
259:                        err.setErrorCode(e.getErrorCodeLocalPart());
260:                        err.setXPathContext(context);
261:                        err.setLocator(this );
262:                        err.setIsTypeError(true);
263:                        throw err;
264:                    }
265:                }
266:                try {
267:                    out.attribute(nameCode, ann, value, locationId, opt);
268:                } catch (XPathException err) {
269:                    throw dynamicError(this , err, context);
270:                }
271:
272:                return null;
273:            }
274:
275:            public Item evaluateItem(XPathContext context)
276:                    throws XPathException {
277:                Orphan o = (Orphan) super .evaluateItem(context);
278:                if (schemaType != null) {
279:                    XPathException err = schemaType.validateContent(o
280:                            .getStringValueCS(), DummyNamespaceResolver
281:                            .getInstance(), context.getConfiguration()
282:                            .getNameChecker());
283:                    if (err != null) {
284:                        throw new ValidationException("Attribute value "
285:                                + Err.wrap(o.getStringValueCS(), Err.VALUE)
286:                                + " does not the match the required type "
287:                                + schemaType.getDescription() + ". "
288:                                + err.getMessage());
289:                    }
290:                    o.setTypeAnnotation(schemaType.getFingerprint());
291:                    if (schemaType.isNamespaceSensitive()) {
292:                        throw new DynamicError(
293:                                "Cannot validate a parentless attribute whose content is namespace-sensitive");
294:                    }
295:                } else if (validationAction == Validation.STRICT
296:                        || validationAction == Validation.LAX) {
297:                    try {
298:                        int ann = context.getController().getConfiguration()
299:                                .validateAttribute(nameCode,
300:                                        o.getStringValueCS(), validationAction);
301:                        o.setTypeAnnotation(ann);
302:                    } catch (ValidationException e) {
303:                        DynamicError err = DynamicError.makeDynamicError(e);
304:                        err.setErrorCode(e.getErrorCodeLocalPart());
305:                        err.setXPathContext(context);
306:                        err.setLocator(this );
307:                        err.setIsTypeError(true);
308:                        throw err;
309:                    }
310:                }
311:
312:                return o;
313:            }
314:
315:            /**
316:             * Display this instruction as an expression, for diagnostics
317:             */
318:
319:            public void display(int level, NamePool pool, PrintStream out) {
320:                out.println(ExpressionTool.indent(level) + "attribute ");
321:                out.println(ExpressionTool.indent(level + 1)
322:                        + "name "
323:                        + (pool == null ? nameCode + "" : pool
324:                                .getDisplayName(nameCode)));
325:                super .display(level + 1, pool, out);
326:            }
327:        }
328:
329:        //
330:        // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
331:        // you may not use this file except in compliance with the License. You may obtain a copy of the
332:        // License at http://www.mozilla.org/MPL/
333:        //
334:        // Software distributed under the License is distributed on an "AS IS" basis,
335:        // WITHOUT WARRANTY OF ANY KIND, either express or implied.
336:        // See the License for the specific language governing rights and limitations under the License.
337:        //
338:        // The Original Code is: all this file.
339:        //
340:        // The Initial Developer of the Original Code is Michael H. Kay.
341:        //
342:        // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
343:        //
344:        // Contributor(s): none.
345:        //
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