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package org.eclipse.ecf.provider.app;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Entity;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
public class ServerConfigParser {
public static final String SERVER_ELEMENT = "server";
public static final String CONNECTOR_ELEMENT = "connector";
public static final String GROUP_ELEMENT = "group";
public static final String PROTOCOL_ATTR = "protocol";
public static final String HOSTNAME_ATTR = "hostname";
public static final String PORT_ATTR = "port";
public static final String TIMEOUT_ATTR = "timeout";
public static final String NAME_ATTR = "name";
protected void findElementsNamed(Node top, String name, List aList) {
int type = top.getNodeType();
switch (type) {
case Node.DOCUMENT_TYPE_NODE:
// Print entities if any
NamedNodeMap nodeMap = ((DocumentType) top).getEntities();
for (int i = 0; i < nodeMap.getLength(); i++) {
Entity entity = (Entity) nodeMap.item(i);
findElementsNamed(entity, name, aList);
}
break;
case Node.ELEMENT_NODE:
String elementName = top.getNodeName();
if (name.equals(elementName)) {
aList.add(top);
}
default:
for (Node child = top.getFirstChild(); child != null; child = child
.getNextSibling()) {
findElementsNamed(child, name, aList);
}
}
}
protected List processConnectorNodes(List connectorNodes) {
List res = new ArrayList();
for(Iterator i=connectorNodes.iterator(); i.hasNext(); ) {
Node n = (Node) i.next();
String ports = getAttributeValue(n,PORT_ATTR);
int port = Connector.DEFAULT_PORT;
if (ports != null) {
try {
Integer porti = new Integer(ports);
port = porti.intValue();
} catch (NumberFormatException e) {
// ignore
}
}
String timeouts = getAttributeValue(n,TIMEOUT_ATTR);
int timeout = Connector.DEFAULT_TIMEOUT;
if (timeouts != null) {
try {
Integer timeouti = new Integer(timeouts);
timeout = timeouti.intValue();
} catch (NumberFormatException e) {
// ignore
}
}
String prot = getAttributeValue(n,PROTOCOL_ATTR);
String host = getAttributeValue(n,HOSTNAME_ATTR);
Connector c = new Connector(this, prot,host,port,timeout);
processConnector(n,c);
res.add(c);
}
return res;
}
protected void processConnector(Node n, Connector c) {
List groupList = new ArrayList();
findElementsNamed(n,GROUP_ELEMENT,groupList);
for(Iterator i=groupList.iterator(); i.hasNext(); ) {
Node node = (Node) i.next();
String name = getAttributeValue(node,NAME_ATTR);
if (name != null && !name.equals("")) {
NamedGroup g = new NamedGroup(name);
c.addGroup(g);
g.setParent(c);
}
}
}
protected List loadConnectors(Document doc) {
List ps = new ArrayList();
findElementsNamed(doc,CONNECTOR_ELEMENT,ps);
return processConnectorNodes(ps);
}
protected String getAttributeValue(Node node, String attrName) {
NamedNodeMap attrs = node.getAttributes();
Node attrNode = attrs.getNamedItem(attrName);
if (attrNode != null) {
return attrNode.getNodeValue();
} else
return "";
}
public List load(InputStream ins) throws ParserConfigurationException, SAXException, IOException {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(ins);
return loadConnectors(doc);
}
public static void main(String [] args) throws Exception {
InputStream ins = new FileInputStream(args[0]);
ServerConfigParser configParser = new ServerConfigParser();
List res = configParser.load(ins);
System.out.println("result is "+res);
}
}
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