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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.Collection;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.Map;
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 ContextParser {
private static final XMLInputFactory xmlInputFactory = XMLInputFactory.newFactory();
private static final String CONTEXT = "context";
private static final String TOPIC = "topic";
private static final String HREF = "href";
private static final String ID_TAG = "id";
public Map<String, ContextEntry> entries = new HashMap<String, ContextEntry>();
public String path;
private String localName;
private String uri;
private ContextEntry currentEntry;
public ContextParser(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 (CONTEXT.equals(localName)) {
String id = reader.getAttributeValue(uri, ID_TAG);
if (Strings.isValid(id)) {
currentEntry = new ContextEntry(id);
}
} else if (TOPIC.equals(localName) && currentEntry != null) {
String reference = reader.getAttributeValue(uri, HREF);
if (Strings.isValid(reference)) {
String path = normalizePath(reference);
currentEntry.getReferences().add(path);
}
}
break;
case XMLStreamConstants.END_ELEMENT:
localName = reader.getLocalName();
uri = reader.getNamespaceURI();
if (CONTEXT.equals(localName) && currentEntry != null) {
entries.put(currentEntry.getId(), currentEntry);
reset();
}
break;
}
}
private String normalizePath(String reference) {
return reference.replaceAll("\\.html#.*", ".html");
}
private void reset() {
localName = null;
uri = null;
currentEntry = null;
}
public Collection<ContextEntry> getEntries() {
return entries.values();
}
public ContextEntry getEntry(String id) {
return entries.get(id);
}
public Set<String> getIds() {
return entries.keySet();
}
public final class ContextEntry {
private final String id;
private final Set<String> references = new LinkedHashSet<String>();
public ContextEntry(String id) {
super();
this.id = id;
}
public String getId() {
return id;
}
public Set<String> getReferences() {
return references;
}
}
}
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