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/**
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*
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.*;
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import java.util.*;
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import org.xml.sax.helpers.DefaultHandler;
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import org.xml.sax.Attributes;
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import org.xml.sax.SAXException;
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import javax.xml.parsers.SAXParserFactory;
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import javax.xml.parsers.SAXParser;
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import org.xml.sax.InputSource;
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/**
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* @author berkley
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* A class to parse, then encapsulate a metacat result set
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*/
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public class MetacatResultSet extends DefaultHandler
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{
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private Vector<Document> documents;
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private Document document;
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private String currentElement;
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private String paramName;
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private boolean inDocument = false;
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public MetacatResultSet(String s)
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throws Exception
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{
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try
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{
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documents = new Vector();
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SAXParserFactory factory = SAXParserFactory.newInstance();
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factory.setValidating(false);
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SAXParser parser = factory.newSAXParser();
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parser.parse(new InputSource(new StringReader(s)), this);
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}
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catch(Exception e)
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{
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e.printStackTrace();
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throw new Exception("Could not parse the resultset: " + e.getMessage());
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}
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}
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public void characters(char[] ch, int start, int length) throws SAXException
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{
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String content = new String(ch, start, length);
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//System.out.println("currentElement: " + currentElement);
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//System.out.println("content: " + content);
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if(currentElement.equals("document"))
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{
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}
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else if(currentElement.equals("docid"))
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{
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document.docid = content;
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}
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else if(currentElement.equals("docname"))
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{
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document.docname = content;
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}
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else if(currentElement.equals("doctype"))
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{
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document.doctype = content;
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}
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else if(currentElement.equals("createdate"))
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{
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document.createdate = content;
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}
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else if(currentElement.equals("updatedate"))
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{
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document.updatedate = content;
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}
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else if(currentElement.equals("param"))
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{
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//System.out.println("setting param: " + paramName + " with value " + content);
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document.setField(paramName, content);
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}
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}
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public void startDocument()
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{
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}
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public void endDocument()
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{
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}
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public void startElement(String uri, String localName, String qName, Attributes attributes)
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{
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currentElement = qName;
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//System.out.println("currentElement: " + currentElement);
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//System.out.println("inDocument: " + inDocument);
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if(qName.equals("document"))
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{
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document = new Document();
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inDocument = true;
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}
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if(qName.equals("param"))
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{
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paramName = attributes.getValue("name");
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}
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}
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public void endElement(String uri, String localName, String qName)
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{
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if(qName.equals("document"))
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{
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documents.add(document);
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}
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}
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public List getDocuments()
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{
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return documents;
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}
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public class Document
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{
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private Hashtable<String, String> fields = new Hashtable();
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public String docid;
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public String docname;
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public String doctype;
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public String createdate;
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public String updatedate;
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public Document()
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{
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docid = null;
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docname = null;
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doctype = null;
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createdate = null;
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updatedate = null;
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}
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public String getField(String name)
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{
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return fields.get(name);
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}
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public void setField(String name, String value)
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{
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String val = fields.get(name);
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if(val != null)
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{
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val += value;
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}
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else
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{
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val = value;
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}
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fields.put(name, val);
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}
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public String toString()
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{
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String s = new String();
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s = "{docid=" + docid.trim() + ", " +
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"docname=" + docname.trim() + ", " +
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"doctype=" + doctype.trim() + ", " +
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"createdate=" + createdate.trim() + ", " +
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"updatedate=" + updatedate.trim();
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Enumeration keys = fields.keys();
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while(keys.hasMoreElements())
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{
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s += ", ";
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String name = (String)keys.nextElement();
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String value = fields.get(name);
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s += name.trim() + "=" + value.trim();
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}
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s += "}";
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return s;
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}
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}
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}
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