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11 package ch.qos.logback.core.joran.event;
12
13 import java.io.IOException;
14 import java.io.InputStream;
15 import java.util.ArrayList;
16 import java.util.List;
17
18 import javax.xml.parsers.SAXParser;
19 import javax.xml.parsers.SAXParserFactory;
20
21 import org.xml.sax.Attributes;
22 import org.xml.sax.InputSource;
23 import org.xml.sax.Locator;
24 import org.xml.sax.SAXException;
25 import org.xml.sax.SAXParseException;
26 import org.xml.sax.helpers.DefaultHandler;
27
28 import ch.qos.logback.core.Context;
29 import ch.qos.logback.core.joran.spi.JoranException;
30 import ch.qos.logback.core.joran.spi.Pattern;
31 import ch.qos.logback.core.spi.ContextAware;
32 import ch.qos.logback.core.spi.ContextAwareImpl;
33 import ch.qos.logback.core.status.Status;
34
35 public class SaxEventRecorder extends DefaultHandler implements ContextAware {
36
37
38 final ContextAwareImpl cai;
39
40 public SaxEventRecorder() {
41 cai = new ContextAwareImpl(this);
42 }
43 public List<SaxEvent> saxEventList = new ArrayList<SaxEvent>();
44 Locator locator;
45 Pattern globalPattern = new Pattern();
46
47
48 final public void recordEvents(InputStream inputStream) throws JoranException {
49 recordEvents(new InputSource(inputStream));
50 }
51
52 public List<SaxEvent> recordEvents(InputSource inputSource)
53 throws JoranException {
54 SAXParser saxParser = null;
55 try {
56 SAXParserFactory spf = SAXParserFactory.newInstance();
57 spf.setValidating(false);
58 spf.setNamespaceAware(true);
59 saxParser = spf.newSAXParser();
60 } catch (Exception pce) {
61 String errMsg = "Parser configuration error occured";
62 addError(errMsg, pce);
63 throw new JoranException(errMsg, pce);
64 }
65
66 try {
67 saxParser.parse(inputSource, this);
68 return saxEventList;
69
70 } catch (IOException ie) {
71 String errMsg = "I/O error occurred while parsing xml file";
72 addError(errMsg, ie);
73 throw new JoranException(errMsg, ie);
74 } catch (Exception ex) {
75 String errMsg = "Problem parsing XML document. See previously reported errors. Abandoning all further processing.";
76 addError(errMsg, ex);
77 throw new JoranException(errMsg, ex);
78 }
79
80 }
81
82 public void startDocument() {
83 }
84
85 public Locator getLocator() {
86 return locator;
87 }
88
89 public void setDocumentLocator(Locator l) {
90 locator = l;
91 }
92
93 public void startElement(String namespaceURI, String localName, String qName,
94 Attributes atts) {
95
96 String tagName = getTagName(localName, qName);
97 globalPattern.push(tagName);
98 Pattern current = (Pattern) globalPattern.clone();
99 saxEventList.add(new StartEvent(current, namespaceURI, localName, qName,
100 atts, getLocator()));
101 }
102
103 public void characters(char[] ch, int start, int length) {
104
105 String body = new String(ch, start, length);
106 if (body == null) {
107 return;
108 }
109
110
111 if (body != null) {
112 String bodyTrimmed = body.trim();
113 if (bodyTrimmed.length() == 0) {
114 return;
115 }
116 }
117
118 SaxEvent lastEvent = getLastEvent();
119 if (lastEvent instanceof BodyEvent) {
120 BodyEvent be = (BodyEvent) lastEvent;
121 be.append(body);
122 } else {
123 saxEventList.add(new BodyEvent(body, getLocator()));
124 }
125
126 }
127
128 SaxEvent getLastEvent() {
129 if (saxEventList.isEmpty()) {
130 return null;
131 }
132 int size = saxEventList.size();
133 return saxEventList.get(size - 1);
134 }
135
136 public void endElement(String namespaceURI, String localName, String qName) {
137 saxEventList
138 .add(new EndEvent(namespaceURI, localName, qName, getLocator()));
139 globalPattern.pop();
140 }
141
142 String getTagName(String localName, String qName) {
143 String tagName = localName;
144 if ((tagName == null) || (tagName.length() < 1)) {
145 tagName = qName;
146 }
147 return tagName;
148 }
149
150 public void error(SAXParseException spe) throws SAXException {
151 addError("Parsing error on line " + spe.getLineNumber() + " and column "
152 + spe.getColumnNumber(), spe);
153 }
154
155 public void fatalError(SAXParseException spe) throws SAXException {
156 addError("Parsing fatal error on line " + spe.getLineNumber() + " and column "
157 + spe.getColumnNumber(), spe);
158 }
159
160 public void warning(SAXParseException spe) throws SAXException {
161 addWarn("Parsing warning on line " + spe.getLineNumber() + " and column "
162 + spe.getColumnNumber(), spe);
163 }
164
165 public void addError(String msg) {
166 cai.addError(msg);
167 }
168
169 public void addError(String msg, Throwable ex) {
170 cai.addError(msg, ex);
171 }
172
173 public void addInfo(String msg) {
174 cai.addInfo(msg);
175 }
176
177 public void addInfo(String msg, Throwable ex) {
178 cai.addInfo(msg, ex);
179 }
180
181 public void addStatus(Status status) {
182 cai.addStatus(status);
183 }
184
185 public void addWarn(String msg) {
186 cai.addWarn(msg);
187 }
188
189 public void addWarn(String msg, Throwable ex) {
190 cai.addWarn(msg, ex);
191 }
192
193 public Context getContext() {
194 return cai.getContext();
195 }
196
197 public void setContext(Context context) {
198 cai.setContext(context);
199 }
200
201 public List<SaxEvent> getSaxEventList() {
202 return saxEventList;
203 }
204
205 }