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/*******************************************************************************
* Copyright (c) 2013 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.help.ui.util;
import java.io.BufferedInputStream;
import java.io.InputStream;
import java.net.URL;
import java.util.HashSet;
import java.util.Set;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
import org.eclipse.osee.framework.jdk.core.util.Lib;
import org.eclipse.osee.framework.jdk.core.util.Strings;
/**
* @author Angel Avila
*/
public class TocParser {
private static final XMLInputFactory xmlInputFactory = XMLInputFactory.newFactory();
private static final String TOC = "toc";
private static final String TOPIC = "topic";
private static final String HREF = "href";
public Set<String> entries = new HashSet<>();
public String path;
private String localName;
private String uri;
public TocParser(String path) {
this.path = path;
}
public void parse() throws Exception {
entries.clear();
URL url = HelpTestUtil.getResource(path);
InputStream inputStream = null;
try {
inputStream = new BufferedInputStream(url.openStream());
XMLStreamReader streamReader = xmlInputFactory.createXMLStreamReader(inputStream);
while (streamReader.hasNext()) {
process(streamReader);
streamReader.next();
}
} finally {
Lib.close(inputStream);
}
}
private void process(XMLStreamReader reader) {
int eventType = reader.getEventType();
switch (eventType) {
case XMLStreamConstants.START_ELEMENT:
localName = reader.getLocalName();
uri = reader.getNamespaceURI();
if (TOC.equals(localName)) {
processReference(reader, TOPIC);
} else if (TOPIC.equals(localName)) {
processReference(reader, HREF);
}
break;
case XMLStreamConstants.END_ELEMENT:
localName = reader.getLocalName();
uri = reader.getNamespaceURI();
reset();
break;
}
}
private void processReference(XMLStreamReader reader, String tag) {
String reference = reader.getAttributeValue(uri, tag);
if (Strings.isValid(reference)) {
String path = normalizePath(reference);
entries.add(path);
}
}
private String normalizePath(String reference) {
return reference.replaceAll("\\.html#.*", ".html");
}
private void reset() {
localName = null;
uri = null;
}
public Set<String> getEntries() {
return entries;
}
}
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