Source Code Cross Referenced for AbstractDOMStreamReader.java in  » Web-Services-apache-cxf-2.0.1 » common » org » apache » cxf » staxutils » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Services apache cxf 2.0.1 » common » org.apache.cxf.staxutils 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Licensed to the Apache Software Foundation (ASF) under one
003:         * or more contributor license agreements. See the NOTICE file
004:         * distributed with this work for additional information
005:         * regarding copyright ownership. The ASF licenses this file
006:         * to you under the Apache License, Version 2.0 (the
007:         * "License"); you may not use this file except in compliance
008:         * with the License. You may obtain a copy of the License at
009:         *
010:         * http://www.apache.org/licenses/LICENSE-2.0
011:         *
012:         * Unless required by applicable law or agreed to in writing,
013:         * software distributed under the License is distributed on an
014:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015:         * KIND, either express or implied. See the License for the
016:         * specific language governing permissions and limitations
017:         * under the License.
018:         */package org.apache.cxf.staxutils;
019:
020:        import java.util.HashMap;
021:        import java.util.List;
022:        import java.util.Map;
023:
024:        import javax.xml.stream.Location;
025:        import javax.xml.stream.XMLStreamConstants;
026:        import javax.xml.stream.XMLStreamException;
027:        import javax.xml.stream.XMLStreamReader;
028:
029:        /**
030:         * Abstract logic for creating XMLStreamReader from DOM documents. Its works
031:         * using adapters for Element, Node and Attribute (
032:         * 
033:         * @see ElementAdapter }
034:         * @author <a href="mailto:tsztelak@gmail.com">Tomasz Sztelak</a>
035:         */
036:        public abstract class AbstractDOMStreamReader implements 
037:                XMLStreamReader {
038:            protected int currentEvent = XMLStreamConstants.START_DOCUMENT;
039:
040:            private Map properties = new HashMap();
041:
042:            private FastStack<ElementFrame> frames = new FastStack<ElementFrame>();
043:
044:            private ElementFrame frame;
045:
046:            /**
047:             *     
048:             */
049:            public static class ElementFrame {
050:                Object element;
051:
052:                boolean started;
053:
054:                boolean ended;
055:
056:                int currentChild = -1;
057:
058:                int currentAttribute = -1;
059:
060:                int currentNamespace = -1;
061:
062:                int currentElement = -1;
063:                List<String> uris;
064:                List<String> prefixes;
065:                List<Object> attributes;
066:                List<Object> allAttributes;
067:
068:                final ElementFrame parent;
069:
070:                public ElementFrame(Object element, ElementFrame parent) {
071:                    this .element = element;
072:                    this .parent = parent;
073:                }
074:
075:                public Object getElement() {
076:                    return element;
077:                }
078:
079:            }
080:
081:            /**
082:             * @param element
083:             */
084:            public AbstractDOMStreamReader(ElementFrame frame) {
085:                this .frame = frame;
086:                frames.push(this .frame);
087:            }
088:
089:            protected ElementFrame getCurrentFrame() {
090:                return frame;
091:            }
092:
093:            /*
094:             * (non-Javadoc)
095:             * 
096:             * @see javax.xml.stream.XMLStreamReader#getProperty(java.lang.String)
097:             */
098:            public Object getProperty(String key)
099:                    throws IllegalArgumentException {
100:                return properties.get(key);
101:            }
102:
103:            /*
104:             * (non-Javadoc)
105:             * 
106:             * @see javax.xml.stream.XMLStreamReader#next()
107:             */
108:            public int next() throws XMLStreamException {
109:                if (frame.ended) {
110:                    frames.pop();
111:                    if (!frames.empty()) {
112:                        frame = (ElementFrame) frames.peek();
113:                    } else {
114:                        currentEvent = END_DOCUMENT;
115:                        return currentEvent;
116:                    }
117:                }
118:
119:                if (!frame.started) {
120:                    frame.started = true;
121:                    currentEvent = START_ELEMENT;
122:                } else if (frame.currentAttribute < getAttributeCount() - 1) {
123:                    frame.currentAttribute++;
124:                    currentEvent = ATTRIBUTE;
125:                } else if (frame.currentNamespace < getNamespaceCount() - 1) {
126:                    frame.currentNamespace++;
127:                    currentEvent = NAMESPACE;
128:                } else if (frame.currentChild < getChildCount() - 1) {
129:                    frame.currentChild++;
130:
131:                    currentEvent = moveToChild(frame.currentChild);
132:
133:                    if (currentEvent == START_ELEMENT) {
134:                        ElementFrame newFrame = getChildFrame(frame.currentChild);
135:                        newFrame.started = true;
136:                        frame = newFrame;
137:                        frames.push(this .frame);
138:                        currentEvent = START_ELEMENT;
139:
140:                        newFrame(newFrame);
141:                    }
142:                } else {
143:                    frame.ended = true;
144:                    currentEvent = END_ELEMENT;
145:                    endElement();
146:                }
147:                return currentEvent;
148:            }
149:
150:            protected void newFrame(ElementFrame newFrame) {
151:            }
152:
153:            protected void endElement() {
154:            }
155:
156:            protected abstract int moveToChild(int currentChild);
157:
158:            protected abstract ElementFrame getChildFrame(int currentChild);
159:
160:            protected abstract int getChildCount();
161:
162:            /*
163:             * (non-Javadoc)
164:             * 
165:             * @see javax.xml.stream.XMLStreamReader#require(int, java.lang.String,
166:             *      java.lang.String)
167:             */
168:            public void require(int arg0, String arg1, String arg2)
169:                    throws XMLStreamException {
170:                throw new UnsupportedOperationException();
171:            }
172:
173:            /*
174:             * (non-Javadoc)
175:             * 
176:             * @see javax.xml.stream.XMLStreamReader#getElementText()
177:             */
178:            public abstract String getElementText() throws XMLStreamException;
179:
180:            /*
181:             * (non-Javadoc)
182:             * 
183:             * @see javax.xml.stream.XMLStreamReader#nextTag()
184:             */
185:            public int nextTag() throws XMLStreamException {
186:                while (hasNext()) {
187:                    if (START_ELEMENT == next()) {
188:                        return START_ELEMENT;
189:                    }
190:                }
191:
192:                return currentEvent;
193:            }
194:
195:            /*
196:             * (non-Javadoc)
197:             * 
198:             * @see javax.xml.stream.XMLStreamReader#hasNext()
199:             */
200:            public boolean hasNext() throws XMLStreamException {
201:                return !(frames.size() == 0 && frame.ended);
202:
203:            }
204:
205:            /*
206:             * (non-Javadoc)
207:             * 
208:             * @see javax.xml.stream.XMLStreamReader#close()
209:             */
210:            public void close() throws XMLStreamException {
211:            }
212:
213:            /*
214:             * (non-Javadoc)
215:             * 
216:             * @see javax.xml.stream.XMLStreamReader#getNamespaceURI(java.lang.String)
217:             */
218:            public abstract String getNamespaceURI(String prefix);
219:
220:            /*
221:             * (non-Javadoc)
222:             * 
223:             * @see javax.xml.stream.XMLStreamReader#isStartElement()
224:             */
225:            public boolean isStartElement() {
226:                return currentEvent == START_ELEMENT;
227:            }
228:
229:            /*
230:             * (non-Javadoc)
231:             * 
232:             * @see javax.xml.stream.XMLStreamReader#isEndElement()
233:             */
234:            public boolean isEndElement() {
235:                return currentEvent == END_ELEMENT;
236:            }
237:
238:            /*
239:             * (non-Javadoc)
240:             * 
241:             * @see javax.xml.stream.XMLStreamReader#isCharacters()
242:             */
243:            public boolean isCharacters() {
244:                return currentEvent == CHARACTERS;
245:            }
246:
247:            /*
248:             * (non-Javadoc)
249:             * 
250:             * @see javax.xml.stream.XMLStreamReader#isWhiteSpace()
251:             */
252:            public boolean isWhiteSpace() {
253:                return currentEvent == SPACE;
254:            }
255:
256:            public int getEventType() {
257:                return currentEvent;
258:            }
259:
260:            public int getTextCharacters(int sourceStart, char[] target,
261:                    int targetStart, int length) throws XMLStreamException {
262:                char[] src = getText().toCharArray();
263:
264:                if (sourceStart + length >= src.length) {
265:                    length = src.length - sourceStart;
266:                }
267:
268:                for (int i = 0; i < length; i++) {
269:                    target[targetStart + i] = src[i + sourceStart];
270:                }
271:
272:                return length;
273:            }
274:
275:            public boolean hasText() {
276:                return currentEvent == CHARACTERS || currentEvent == DTD
277:                        || currentEvent == ENTITY_REFERENCE
278:                        || currentEvent == COMMENT || currentEvent == SPACE;
279:            }
280:
281:            public Location getLocation() {
282:                return new Location() {
283:
284:                    public int getCharacterOffset() {
285:                        return 0;
286:                    }
287:
288:                    public int getColumnNumber() {
289:                        return 0;
290:                    }
291:
292:                    public int getLineNumber() {
293:                        return 0;
294:                    }
295:
296:                    public String getPublicId() {
297:                        return null;
298:                    }
299:
300:                    public String getSystemId() {
301:                        return null;
302:                    }
303:
304:                };
305:            }
306:
307:            public boolean hasName() {
308:                return currentEvent == START_ELEMENT
309:                        || currentEvent == END_ELEMENT;
310:            }
311:
312:            public String getVersion() {
313:                return null;
314:            }
315:
316:            public boolean isStandalone() {
317:                return false;
318:            }
319:
320:            public boolean standaloneSet() {
321:                // TODO Auto-generated method stub
322:                return false;
323:            }
324:
325:            public String getCharacterEncodingScheme() {
326:                // TODO Auto-generated method stub
327:                return null;
328:            }
329:        }
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