/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2011, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.core.joran.event;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;
import ch.qos.logback.core.Context;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.joran.spi.Pattern;
import ch.qos.logback.core.spi.ContextAware;
import ch.qos.logback.core.spi.ContextAwareImpl;
import ch.qos.logback.core.status.Status;
public class SaxEventRecorder extends DefaultHandler implements ContextAware {
final ContextAwareImpl cai;
public SaxEventRecorder() {
cai = new ContextAwareImpl(this);
}
public List<SaxEvent> saxEventList = new ArrayList<SaxEvent>();
Locator locator;
Pattern globalPattern = new Pattern();
final public void recordEvents(InputStream inputStream) throws JoranException {
recordEvents(new InputSource(inputStream));
}
public List<SaxEvent> recordEvents(InputSource inputSource)
throws JoranException {
SAXParser saxParser = null;
try {
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setValidating(false);
spf.setNamespaceAware(true);
saxParser = spf.newSAXParser();
} catch (Exception pce) {
String errMsg = "Parser configuration error occured";
addError(errMsg, pce);
throw new JoranException(errMsg, pce);
}
try {
saxParser.parse(inputSource, this);
return saxEventList;
} catch (IOException ie) {
String errMsg = "I/O error occurred while parsing xml file";
addError(errMsg, ie);
throw new JoranException(errMsg, ie);
} catch (Exception ex) {
String errMsg = "Problem parsing XML document. See previously reported errors. Abandoning all further processing.";
addError(errMsg, ex);
throw new JoranException(errMsg, ex);
}
}
public void startDocument() {
}
public Locator getLocator() {
return locator;
}
public void setDocumentLocator(Locator l) {
locator = l;
}
public void startElement(String namespaceURI, String localName, String qName,
Attributes atts) {
String tagName = getTagName(localName, qName);
globalPattern.push(tagName);
Pattern current = (Pattern) globalPattern.clone();
saxEventList.add(new StartEvent(current, namespaceURI, localName, qName,
atts, getLocator()));
}
public void characters(char[] ch, int start, int length) {
String bodyStr = new String(ch, start, length);
SaxEvent lastEvent = getLastEvent();
if (lastEvent instanceof BodyEvent) {
BodyEvent be = (BodyEvent) lastEvent;
be.append(bodyStr);
} else {
// ignore space only text if the previous event is not a BodyEvent
if (!isSpaceOnly(bodyStr)) {
saxEventList.add(new BodyEvent(bodyStr, getLocator()));
}
}
}
boolean isSpaceOnly(String bodyStr) {
String bodyTrimmed = bodyStr.trim();
return (bodyTrimmed.length() == 0);
}
SaxEvent getLastEvent() {
if (saxEventList.isEmpty()) {
return null;
}
int size = saxEventList.size();
return saxEventList.get(size - 1);
}
public void endElement(String namespaceURI, String localName, String qName) {
saxEventList
.add(new EndEvent(namespaceURI, localName, qName, getLocator()));
globalPattern.pop();
}
String getTagName(String localName, String qName) {
String tagName = localName;
if ((tagName == null) || (tagName.length() < 1)) {
tagName = qName;
}
return tagName;
}
public void error(SAXParseException spe) throws SAXException {
addError("Parsing error on line " + spe.getLineNumber() + " and column "
+ spe.getColumnNumber(), spe);
}
public void fatalError(SAXParseException spe) throws SAXException {
addError("Parsing fatal error on line " + spe.getLineNumber()
+ " and column " + spe.getColumnNumber(), spe);
}
public void warning(SAXParseException spe) throws SAXException {
addWarn("Parsing warning on line " + spe.getLineNumber() + " and column "
+ spe.getColumnNumber(), spe);
}
public void addError(String msg) {
cai.addError(msg);
}
public void addError(String msg, Throwable ex) {
cai.addError(msg, ex);
}
public void addInfo(String msg) {
cai.addInfo(msg);
}
public void addInfo(String msg, Throwable ex) {
cai.addInfo(msg, ex);
}
public void addStatus(Status status) {
cai.addStatus(status);
}
public void addWarn(String msg) {
cai.addWarn(msg);
}
public void addWarn(String msg, Throwable ex) {
cai.addWarn(msg, ex);
}
public Context getContext() {
return cai.getContext();
}
public void setContext(Context context) {
cai.setContext(context);
}
public List<SaxEvent> getSaxEventList() {
return saxEventList;
}
}