Source Code Cross Referenced for XMLConfiguration.java in  » Scripting » Pnuts » pnuts » xml » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » Pnuts » pnuts.xml 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * XMLConfiguration.java
003:         *
004:         * Copyright (c) 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
005:         *
006:         * See the file "LICENSE.txt" for information on usage and redistribution
007:         * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
008:         */
009:        package pnuts.xml;
010:
011:        import pnuts.lang.Context;
012:        import pnuts.lang.Configuration;
013:        import org.w3c.dom.NodeList;
014:        import org.w3c.dom.Node;
015:        import org.w3c.dom.NamedNodeMap;
016:        import org.w3c.dom.Element;
017:        import java.util.Enumeration;
018:        import java.util.ArrayList;
019:        import java.util.Iterator;
020:        import java.util.List;
021:        import java.util.Map;
022:        import org.pnuts.lib.AggregateConfiguration;
023:        import org.w3c.dom.Attr;
024:        import org.w3c.dom.Text;
025:
026:        /**
027:         * This class provides an easier way to access NodeList.
028:         *
029:         * (1) Index access to NodeList.
030:         *	  e.g. nodeList[i]
031:         *
032:         * (2) Iterate NodeList with for/foreach statement
033:         *	 e.g. for (i : nodeList) ...
034:         *
035:         * (3) Attributes
036:         *	 e.g. node["attributeName"]
037:         *
038:         * (4) Navigation
039:         *	 e.g. document.project.target.name
040:         */
041:        public class XMLConfiguration extends AggregateConfiguration {
042:
043:            private final static String TEXT = "text".intern();
044:            private final static String TEXT_TRIM = "textTrim".intern();
045:            private final static String GET_CHILDREN = "getChildren".intern();
046:            private final static String GET_CHILD = "getChild".intern();
047:            private final static String ATTRIBUTES = "attributes".intern();
048:
049:            public XMLConfiguration() {
050:            }
051:
052:            public XMLConfiguration(Configuration base) {
053:                super (base);
054:            }
055:
056:            static class NodeListEnum implements  Enumeration {
057:                NodeList nodeList;
058:                int idx;
059:                int len;
060:
061:                NodeListEnum(NodeList nodeList) {
062:                    this .nodeList = nodeList;
063:                    this .idx = 0;
064:                    this .len = nodeList.getLength();
065:                }
066:
067:                public boolean hasMoreElements() {
068:                    return idx < len;
069:                }
070:
071:                public Object nextElement() {
072:                    return nodeList.item(idx++);
073:                }
074:            }
075:
076:            static List findNodes(Node node, String name) {
077:                NodeList nodeList = node.getChildNodes();
078:                ArrayList lst = new ArrayList();
079:                for (int i = 0; i < nodeList.getLength(); i++) {
080:                    Node n = nodeList.item(i);
081:                    if (n.getNodeName().equals(name)) {
082:                        lst.add(n);
083:                    }
084:                }
085:                return lst;
086:            }
087:
088:            static String getText(Node node) {
089:                NodeList nodeList = node.getChildNodes();
090:                int len = nodeList.getLength();
091:                for (int i = 0; i < len; i++) {
092:                    Node n = nodeList.item(i);
093:                    if (n instanceof  Text) {
094:                        return n.getNodeValue();
095:                    }
096:                }
097:                return "";
098:            }
099:
100:            static Element getElement(NodeList nodeList, String skey) {
101:                int len = nodeList.getLength();
102:                for (int i = 0; i < len; i++) {
103:                    Node n = nodeList.item(i);
104:                    if (n instanceof  Element) {
105:                        Element e = (Element) n;
106:                        if (e.getTagName().equals(skey)) {
107:                            return e;
108:                        }
109:                    }
110:                }
111:                return null;
112:            }
113:
114:            static Element getElement(NodeList nodeList, int idx) {
115:                int len = nodeList.getLength();
116:                int count = 0;
117:                for (int i = 0; i < len; i++) {
118:                    Node n = nodeList.item(i);
119:                    if (n instanceof  Element) {
120:                        if (idx == count) {
121:                            return (Element) n;
122:                        }
123:                        count++;
124:                    }
125:                }
126:                return null;
127:            }
128:
129:            public Object getElement(Context context, Object target, Object key) {
130:                String skey = null;
131:                int idx = 0;
132:
133:                if (key instanceof  Number) {
134:                    idx = ((Number) key).intValue();
135:                } else if (key instanceof  String) {
136:                    skey = (String) key;
137:                } else {
138:                    return super .getElement(context, target, key);
139:                }
140:                if ((target instanceof  Element) && skey != null) {
141:                    if (skey.charAt(0) == '@') {
142:                        return ((Element) target).getAttribute(skey
143:                                .substring(1));
144:                    } else {
145:                        return getElement(((Element) target).getChildNodes(),
146:                                skey);
147:                    }
148:                } else if (target instanceof  NodeList) {
149:                    NodeList nodeList = (NodeList) target;
150:                    if (skey == null) {
151:                        return getElement(nodeList, idx);
152:                    } else {
153:                        return getElement(nodeList, skey);
154:                    }
155:                } else if (target instanceof  NamedNodeMap) {
156:                    NamedNodeMap nodeMap = (NamedNodeMap) target;
157:                    if (skey != null) {
158:                        return nodeMap.getNamedItem(skey);
159:                    } else {
160:                        return nodeMap.item(idx);
161:                    }
162:                }
163:                return super .getElement(context, target, key);
164:            }
165:
166:            public void setElement(Context context, Object target, Object key,
167:                    Object value) {
168:                String skey = null;
169:                if (key instanceof  String) {
170:                    skey = (String) key;
171:                    if (target instanceof  Element) {
172:                        if (skey.charAt(0) == '@')
173:                            skey = skey.substring(1);
174:                        ((Element) target).setAttribute(skey, (String) value);
175:                        return;
176:                    }
177:                }
178:                super .setElement(context, target, key, value);
179:            }
180:
181:            public Object getField(Context context, Object target, String name) {
182:                if (target instanceof  Node) {
183:                    if (name == TEXT) {
184:                        return getText((Node) target);
185:                    } else if (name == TEXT_TRIM) {
186:                        return getText((Node) target).trim();
187:                    } else if (name == ATTRIBUTES) {
188:                        NamedNodeMap nodeMap = ((Node) target).getAttributes();
189:                        Element element = null;
190:                        if (target instanceof  Element) {
191:                            element = (Element) target;
192:                        }
193:                        return new DOMAttributeMap(element, nodeMap);
194:                    }
195:                    List lst = findNodes((Node) target, name);
196:                    int size = lst.size();
197:                    if (size == 0) {
198:                        if (name.charAt(0) == '@' && target instanceof  Element) {
199:                            return ((Element) target).getAttribute(name
200:                                    .substring(1));
201:                        }
202:                        return null;
203:                    } else {
204:                        return lst;
205:                    }
206:                } else if (target instanceof  NamedNodeMap) {
207:                    NamedNodeMap m = (NamedNodeMap) target;
208:                    return m.getNamedItem(name);
209:                } else {
210:                    return super .getField(context, target, name);
211:                }
212:            }
213:
214:            public void putField(Context context, Object target, String name,
215:                    Object value) {
216:                if (target instanceof  Element) {
217:                    if (name == TEXT) {
218:                        if (value instanceof  String) {
219:                            ((Element) target).setTextContent((String) value);
220:                        }
221:                    } else if (name == ATTRIBUTES) {
222:                        if (value instanceof  Map) {
223:                            Element element = (Element) target;
224:                            NamedNodeMap m = element.getAttributes();
225:                            int len = m.getLength();
226:                            for (int i = 0; i < len; i++) {
227:                                Attr attr = (Attr) m.item(i);
228:                                element.removeAttributeNode(attr);
229:                            }
230:                            for (Iterator it = ((Map) value).entrySet()
231:                                    .iterator(); it.hasNext();) {
232:                                Map.Entry entry = (Map.Entry) it.next();
233:                                element.setAttribute((String) entry.getKey(),
234:                                        (String) entry.getValue());
235:                            }
236:                        }
237:                    } else if (name.charAt(0) == '@' && value instanceof  String) {
238:                        ((Element) target).setAttribute(name.substring(1),
239:                                (String) value);
240:                    } else {
241:                        super .putField(context, target, name, value);
242:                    }
243:                } else {
244:                    super .putField(context, target, name, value);
245:                }
246:            }
247:
248:            public Object callMethod(Context context, Class c, String name,
249:                    Object args[], Class types[], Object target) {
250:                if (target instanceof  Node) {
251:                    Node node = (Node) target;
252:                    if (name == GET_CHILD && args.length == 1) {
253:                        String tag = (String) args[0];
254:                        NodeList nodeList = node.getChildNodes();
255:                        int len = nodeList.getLength();
256:                        for (int i = 0; i < len; i++) {
257:                            Node n = nodeList.item(i);
258:                            if (n instanceof  Element) {
259:                                if (((Element) n).getTagName().equals(tag)) {
260:                                    return n;
261:                                }
262:                            }
263:                        }
264:                        return null;
265:                    } else if (name == GET_CHILDREN) {
266:                        List list = new ArrayList();
267:                        NodeList nodeList = node.getChildNodes();
268:                        if (args.length == 1) {
269:                            String tag = (String) args[0];
270:                            for (int i = 0; i < nodeList.getLength(); i++) {
271:                                Node n = nodeList.item(i);
272:                                if (n instanceof  Element) {
273:                                    if (((Element) n).getTagName().equals(tag)) {
274:                                        list.add(n);
275:                                    }
276:                                }
277:                            }
278:                        } else if (args.length == 0) {
279:                            for (int i = 0; i < nodeList.getLength(); i++) {
280:                                Node n = nodeList.item(i);
281:                                if (n instanceof  Element) {
282:                                    list.add(n);
283:                                }
284:                            }
285:                        }
286:                        return list;
287:                    }
288:                }
289:                return super .callMethod(context, c, name, args, types, target);
290:            }
291:
292:            public Enumeration toEnumeration(Object object) {
293:                if (object instanceof  NodeList) {
294:                    return new NodeListEnum((NodeList) object);
295:                } else {
296:                    return super.toEnumeration(object);
297:                }
298:            }
299:        }
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