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Java > Open Source Codes > org > apache > jetspeed > webservices > finance > stockmarket > StockQuoteHandler


1 /*
2  * Copyright 2000-2001,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.jetspeed.webservices.finance.stockmarket;
18
19 import org.xml.sax.helpers.XMLFilterImpl JavaDoc;
20 import org.xml.sax.ContentHandler JavaDoc;
21 import org.xml.sax.*;
22
23 /**
24     SAX-based XML event handler (filter). Works with org.xml.sax.XMLReader to filter
25     standard SAX events. This class maps the XML represention of a stock into a java class.
26
27     @author <a HREF="mailto:taylor@apache.org">David Sean Taylor</a>
28     @version $Id: StockQuoteHandler.java,v 1.3 2004/02/23 03:15:29 jford Exp $
29 */
30
31 public class StockQuoteHandler extends XMLFilterImpl JavaDoc
32 {
33     StringBuffer JavaDoc resultBuffer = null;
34     StockQuote result = null;
35     XMLFilterImpl JavaDoc handler = null;
36
37     public void startElement(String JavaDoc uri, String JavaDoc localName, String JavaDoc qName, Attributes attributes)
38         throws SAXException
39     {
40         if (attributes.getValue("href") != null)
41             throw new SAXNotSupportedException("href attributes not supported");
42         if (localName.equals("Price")) {
43             if (result == null) result = new BaseStockQuote();
44             resultBuffer = new StringBuffer JavaDoc();
45         } else if (localName.equals("Name")) {
46             if (result == null) result = new BaseStockQuote();
47             resultBuffer = new StringBuffer JavaDoc();
48         } else if (localName.equals("Symbol")) {
49             if (result == null) result = new BaseStockQuote();
50             resultBuffer = new StringBuffer JavaDoc();
51         } else if (localName.equals("Time")) {
52             if (result == null) result = new BaseStockQuote();
53             resultBuffer = new StringBuffer JavaDoc();
54         } else if (localName.equals("Date")) {
55             if (result == null) result = new BaseStockQuote();
56             resultBuffer = new StringBuffer JavaDoc();
57         } else if (localName.equals("High")) {
58             if (result == null) result = new BaseStockQuote();
59             resultBuffer = new StringBuffer JavaDoc();
60         } else if (localName.equals("Volume")) {
61             if (result == null) result = new BaseStockQuote();
62             resultBuffer = new StringBuffer JavaDoc();
63         } else if (localName.equals("Change")) {
64             if (result == null) result = new BaseStockQuote();
65             resultBuffer = new StringBuffer JavaDoc();
66         } else if (localName.equals("Opening")) {
67             if (result == null) result = new BaseStockQuote();
68             resultBuffer = new StringBuffer JavaDoc();
69         } else if (localName.equals("Low")) {
70             if (result == null) result = new BaseStockQuote();
71             resultBuffer = new StringBuffer JavaDoc();
72         } else {
73             throw new SAXException("Unexpected element "+localName);
74         }
75     }
76
77     public void endElement(String JavaDoc uri, String JavaDoc localName, String JavaDoc qName) throws SAXException {
78         if (localName.equals("Price")) {
79             result.setPrice(resultBuffer.toString());
80         } else if (localName.equals("Name")) {
81             result.setName(resultBuffer.toString());
82         } else if (localName.equals("Symbol")) {
83             result.setSymbol(resultBuffer.toString());
84         } else if (localName.equals("Time")) {
85             result.setTime(resultBuffer.toString());
86         } else if (localName.equals("Date")) {
87             result.setDate(resultBuffer.toString());
88         } else if (localName.equals("High")) {
89             result.setHigh(resultBuffer.toString());
90         } else if (localName.equals("Volume")) {
91             result.setVolume(resultBuffer.toString());
92         } else if (localName.equals("Change")) {
93             result.setChange(resultBuffer.toString());
94         } else if (localName.equals("Opening")) {
95             result.setOpening(resultBuffer.toString());
96         } else if (localName.equals("Low")) {
97             result.setLow(resultBuffer.toString());
98         } else {
99             ContentHandler JavaDoc handler = (ContentHandler JavaDoc)getParent();
100             getParent().setContentHandler(handler);
101             handler.endElement(uri,localName,qName);
102         }
103     }
104
105     public void characters(char[] ch, int start, int length) throws SAXException {
106         if (resultBuffer != null) resultBuffer.append(new String JavaDoc(ch,start,length));
107     }
108     public void setContentHandler(ContentHandler JavaDoc handler) {
109         ((XMLReader)getParent()).setContentHandler(handler);
110     }
111     public StockQuote getResult() {
112         return result;
113     }
114 }
115
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