Source Code Cross Referenced for Navigator.java in  » Template-Engine » freemarker-2.3.10 » freemarker » ext » xml » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Template Engine » freemarker 2.3.10 » freemarker.ext.xml 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 2003 The Visigoth Software Society. All rights
003:         * reserved.
004:         *
005:         * Redistribution and use in source and binary forms, with or without
006:         * modification, are permitted provided that the following conditions
007:         * are met:
008:         *
009:         * 1. Redistributions of source code must retain the above copyright
010:         *    notice, this list of conditions and the following disclaimer.
011:         *
012:         * 2. Redistributions in binary form must reproduce the above copyright
013:         *    notice, this list of conditions and the following disclaimer in
014:         *    the documentation and/or other materials provided with the
015:         *    distribution.
016:         *
017:         * 3. The end-user documentation included with the redistribution, if
018:         *    any, must include the following acknowledgement:
019:         *       "This product includes software developed by the
020:         *        Visigoth Software Society (http://www.visigoths.org/)."
021:         *    Alternately, this acknowledgement may appear in the software itself,
022:         *    if and wherever such third-party acknowledgements normally appear.
023:         *
024:         * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the 
025:         *    project contributors may be used to endorse or promote products derived
026:         *    from this software without prior written permission. For written
027:         *    permission, please contact visigoths@visigoths.org.
028:         *
029:         * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
030:         *    nor may "FreeMarker" or "Visigoth" appear in their names
031:         *    without prior written permission of the Visigoth Software Society.
032:         *
033:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036:         * DISCLAIMED.  IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
037:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044:         * SUCH DAMAGE.
045:         * ====================================================================
046:         *
047:         * This software consists of voluntary contributions made by many
048:         * individuals on behalf of the Visigoth Software Society. For more
049:         * information on the Visigoth Software Society, please see
050:         * http://www.visigoths.org/
051:         */
052:
053:        package freemarker.ext.xml;
054:
055:        import java.io.StringWriter;
056:        import java.util.HashMap;
057:        import java.util.List;
058:        import java.util.Map;
059:        import java.util.WeakHashMap;
060:
061:        import org.jaxen.NamespaceContext;
062:
063:        import freemarker.template.TemplateModelException;
064:
065:        /**
066:         * @version $Id: Navigator.java,v 1.4 2003/01/31 11:39:17 szegedia Exp $
067:         * @author Attila Szegedi
068:         */
069:        abstract class Navigator {
070:            // Cache of already parsed XPath expressions
071:            private final Map xpathCache = new WeakHashMap();
072:            // Operators this navigator defines
073:            private final Map operators = createOperatorMap();
074:            private final NodeOperator attributeOperator = getOperator("_attributes");
075:            private final NodeOperator childrenOperator = getOperator("_children");
076:
077:            NodeOperator getOperator(String key) {
078:                return (NodeOperator) operators.get(key);
079:            }
080:
081:            NodeOperator getAttributeOperator() {
082:                return attributeOperator;
083:            }
084:
085:            NodeOperator getChildrenOperator() {
086:                return childrenOperator;
087:            }
088:
089:            abstract void getAsString(Object node, StringWriter sw)
090:                    throws TemplateModelException;
091:
092:            List applyXPath(List nodes, String xpathString, Object namespaces)
093:                    throws TemplateModelException {
094:                XPathEx xpath = null;
095:                try {
096:                    synchronized (xpathCache) {
097:                        xpath = (XPathEx) xpathCache.get(xpathString);
098:                        if (xpath == null) {
099:                            xpath = createXPathEx(xpathString);
100:                            xpathCache.put(xpathString, xpath);
101:                        }
102:                    }
103:                    return xpath.selectNodes(nodes,
104:                            (NamespaceContext) namespaces);
105:                } catch (Exception e) {
106:                    throw new TemplateModelException(
107:                            "Could not evaulate XPath expression "
108:                                    + xpathString, e);
109:                }
110:            }
111:
112:            interface XPathEx {
113:                List selectNodes(Object nodes, NamespaceContext namespaces)
114:                        throws TemplateModelException;
115:            }
116:
117:            abstract XPathEx createXPathEx(String xpathString)
118:                    throws TemplateModelException;
119:
120:            abstract void getChildren(Object node, String localName,
121:                    String namespaceUri, List result);
122:
123:            abstract void getAttributes(Object node, String localName,
124:                    String namespaceUri, List result);
125:
126:            abstract void getDescendants(Object node, List result);
127:
128:            abstract Object getParent(Object node);
129:
130:            abstract Object getDocument(Object node);
131:
132:            abstract Object getDocumentType(Object node);
133:
134:            private void getAncestors(Object node, List result) {
135:                for (;;) {
136:                    Object parent = getParent(node);
137:                    if (parent == null) {
138:                        break;
139:                    }
140:                    result.add(parent);
141:                    node = parent;
142:                }
143:            }
144:
145:            abstract void getContent(Object node, List result);
146:
147:            abstract String getText(Object node);
148:
149:            abstract String getLocalName(Object node);
150:
151:            abstract String getNamespacePrefix(Object node);
152:
153:            String getQualifiedName(Object node) {
154:                String lname = getLocalName(node);
155:                if (lname == null) {
156:                    return null;
157:                }
158:                String nsprefix = getNamespacePrefix(node);
159:                if (nsprefix == null || nsprefix.length() == 0) {
160:                    return lname;
161:                } else {
162:                    return nsprefix + ":" + lname;
163:                }
164:            }
165:
166:            abstract String getType(Object node);
167:
168:            abstract String getNamespaceUri(Object node);
169:
170:            boolean equal(String s1, String s2) {
171:                return s1 == null ? s2 == null : s1.equals(s2);
172:            }
173:
174:            private Map createOperatorMap() {
175:                Map map = new HashMap();
176:                map.put("_attributes", new AttributesOp());
177:                map.put("@*", map.get("_attributes"));
178:                map.put("_children", new ChildrenOp());
179:                map.put("*", map.get("_children"));
180:                map.put("_descendantOrSelf", new DescendantOrSelfOp());
181:                map.put("_descendant", new DescendantOp());
182:                map.put("_document", new DocumentOp());
183:                map.put("_doctype", new DocumentTypeOp());
184:                map.put("_ancestor", new AncestorOp());
185:                map.put("_ancestorOrSelf", new AncestorOrSelfOp());
186:                map.put("_content", new ContentOp());
187:                map.put("_name", new LocalNameOp());
188:                map.put("_nsprefix", new NamespacePrefixOp());
189:                map.put("_nsuri", new NamespaceUriOp());
190:                map.put("_parent", new ParentOp());
191:                map.put("_qname", new QualifiedNameOp());
192:                map.put("_text", new TextOp());
193:                map.put("_type", new TypeOp());
194:                return map;
195:            }
196:
197:            private class ChildrenOp implements  NodeOperator {
198:                public void process(Object node, String localName,
199:                        String namespaceUri, List result) {
200:                    getChildren(node, localName, namespaceUri, result);
201:                }
202:            }
203:
204:            private class AttributesOp implements  NodeOperator {
205:                public void process(Object node, String localName,
206:                        String namespaceUri, List result) {
207:                    getAttributes(node, localName, namespaceUri, result);
208:                }
209:            }
210:
211:            private class DescendantOrSelfOp implements  NodeOperator {
212:                public void process(Object node, String localName,
213:                        String namespaceUri, List result) {
214:                    result.add(node);
215:                    getDescendants(node, result);
216:                }
217:            }
218:
219:            private class DescendantOp implements  NodeOperator {
220:                public void process(Object node, String localName,
221:                        String namespaceUri, List result) {
222:                    getDescendants(node, result);
223:                }
224:            }
225:
226:            private class AncestorOrSelfOp implements  NodeOperator {
227:                public void process(Object node, String localName,
228:                        String namespaceUri, List result) {
229:                    result.add(node);
230:                    getAncestors(node, result);
231:                }
232:            }
233:
234:            private class AncestorOp implements  NodeOperator {
235:                public void process(Object node, String localName,
236:                        String namespaceUri, List result) {
237:                    getAncestors(node, result);
238:                }
239:            }
240:
241:            private class ParentOp implements  NodeOperator {
242:                public void process(Object node, String localName,
243:                        String namespaceUri, List result) {
244:                    Object parent = getParent(node);
245:                    if (parent != null) {
246:                        result.add(parent);
247:                    }
248:                }
249:            }
250:
251:            private class DocumentOp implements  NodeOperator {
252:                public void process(Object node, String localName,
253:                        String namespaceUri, List result) {
254:                    Object document = getDocument(node);
255:                    if (document != null) {
256:                        result.add(document);
257:                    }
258:                }
259:            }
260:
261:            private class DocumentTypeOp implements  NodeOperator {
262:                public void process(Object node, String localName,
263:                        String namespaceUri, List result) {
264:                    Object documentType = getDocumentType(node);
265:                    if (documentType != null) {
266:                        result.add(documentType);
267:                    }
268:                }
269:            }
270:
271:            private class ContentOp implements  NodeOperator {
272:                public void process(Object node, String localName,
273:                        String namespaceUri, List result) {
274:                    getContent(node, result);
275:                }
276:            }
277:
278:            private class TextOp implements  NodeOperator {
279:                public void process(Object node, String localName,
280:                        String namespaceUri, List result) {
281:                    String text = getText(node);
282:                    if (text != null) {
283:                        result.add(text);
284:                    }
285:                }
286:            }
287:
288:            private class LocalNameOp implements  NodeOperator {
289:                public void process(Object node, String localName,
290:                        String namespaceUri, List result) {
291:                    String text = getLocalName(node);
292:                    if (text != null) {
293:                        result.add(text);
294:                    }
295:                }
296:            }
297:
298:            private class QualifiedNameOp implements  NodeOperator {
299:                public void process(Object node, String localName,
300:                        String namespaceUri, List result) {
301:                    String qname = getQualifiedName(node);
302:                    if (qname != null) {
303:                        result.add(qname);
304:                    }
305:                }
306:            }
307:
308:            private class NamespacePrefixOp implements  NodeOperator {
309:                public void process(Object node, String localName,
310:                        String namespaceUri, List result) {
311:                    String text = getNamespacePrefix(node);
312:                    if (text != null) {
313:                        result.add(text);
314:                    }
315:                }
316:            }
317:
318:            private class NamespaceUriOp implements  NodeOperator {
319:                public void process(Object node, String localName,
320:                        String namespaceUri, List result) {
321:                    String text = getNamespaceUri(node);
322:                    if (text != null) {
323:                        result.add(text);
324:                    }
325:                }
326:            }
327:
328:            private class TypeOp implements  NodeOperator {
329:                public void process(Object node, String localName,
330:                        String namespaceUri, List result) {
331:                    result.add(getType(node));
332:                }
333:            }
334:        }
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