|
1
37
38 package com.sun.j2ee.blueprints.opc.webservicebroker.provider;
39
40 import java.io.*;
41 import java.util.*;
42 import org.w3c.dom.*;
43 import org.xml.sax.*;
44 import javax.xml.parsers.*;
45 import org.xml.sax.helpers.*;
46 import javax.xml.transform.*;
47 import javax.xml.transform.dom.*;
48 import javax.xml.transform.stream.*;
49
50 public class BrokerTransformer {
51
52 public static final String  ACTIVITY_INVOICE = "http://java.sun.com/blueprints/schemas/invoice-activity.xsd";
53 public static final String AIRLINE_INVOICE = "http://java.sun.com/blueprints/schemas/invoice-airline.xsd";
54 public static final String LODGING_INVOICE = "http://java.sun.com/blueprints/schemas/invoice-lodging.xsd";
55 public static final String XSL_CLASSPATH_BASE = "/com/sun/j2ee/blueprints/opc/webservicebroker/provider/";
56
57 public static final String ACTIVITY_XSL = "invoice-activity.xsl";
58 public static final String AIRLINE_XSL = "invoice-airline.xsl";
59 public static final String LODGING_XSL = "invoice-lodging.xsl";
60
61
62 private String transformedDoc = null;
63 private ByteArrayOutputStream bos = null;
64 private CharArrayWriter caw = null;
65 private SAXParser parser = null;
66 private HashMap transformers = null;
67 private TransformerFactory transformerFactory = null;
68
69
78
79 public BrokerTransformer() {
80 SAXParserFactory sparserFactory = SAXParserFactory.newInstance();
81 try {
82 sparserFactory.setValidating(true);
83 sparserFactory.setNamespaceAware(true);
84 parser = sparserFactory.newSAXParser();
85 addTransformer(ACTIVITY_XSL);
87 addTransformer(AIRLINE_XSL);
88 addTransformer(LODGING_XSL);
89 } catch (Exception ex) {
90 System.err.println("BrokerTransformer initizalization error: " + ex);
91 }
92 }
93
94 private void addTransformer(String name) {
95 if (transformers == null) transformers = new HashMap();
96 if (transformerFactory == null) {
97 transformerFactory = TransformerFactory.newInstance();
98 }
99 StreamSource tranformerXSL =
100 new StreamSource(getClass().getResourceAsStream(
101 XSL_CLASSPATH_BASE + name));
102 try {
103 Transformer tempTransfomer =
104 transformerFactory.newTransformer(tranformerXSL);
105 transformers.put(name, tempTransfomer);
106 } catch (TransformerConfigurationException fcx) {}
107
108 }
109
110 private void init(InputSource in) {
111 try {
112 transformedDoc = null;
113 caw = new CharArrayWriter();
114 Reader reader = in.getCharacterStream();
115 caw = new CharArrayWriter();
117 long total =0;
118 char [] buff = new char[1024];
119 while (true) {
120 int read = reader.read(buff,0,buff.length);
121 total += read;
122 if (read <=0) break;
123 caw.write(buff,0, read);
124 }
125 caw.close();
126 reader.close();
127 } catch (java.io.IOException iox) {
128 iox.printStackTrace();
129 }
130 }
131
132 public String transform(InputSource is) {
133 init(is);
135 try {
136 parser.parse(new InputSource(new CharArrayReader(caw.toCharArray())),
139 new DefaultHandler() {
140 private boolean foundFirst = false;
141 public void startElement(String namespace,
142 String name,
143 String qName,
144 Attributes attrs) {
145 if (!foundFirst) {
146 if ( name.equals("Invoice") ) {
147 String schemaLocation = attrs.getValue("xsi:schemaLocation");
148 if (schemaLocation.endsWith( AIRLINE_INVOICE)) {
149 doXSLTTransformation((Transformer)transformers.get(AIRLINE_XSL));
150 } else if (schemaLocation.endsWith( ACTIVITY_INVOICE)) {
151 doXSLTTransformation((Transformer)transformers.get(ACTIVITY_XSL));
152 } else if (schemaLocation.endsWith( LODGING_INVOICE)) {
153 doXSLTTransformation((Transformer)transformers.get(LODGING_XSL));
154 }
155 }
156 }
157 }
158 });
159 } catch (org.xml.sax.SAXException ex) {
160 System.err.println("BrokerTransformer error: " + ex);
161 } catch (IOException iox) {
162 System.err.println("BrokerTransformer error: " + iox);
163 }
164 return transformedDoc;
165 }
166
167 private void doXSLTTransformation (Transformer transformer) {
168 StreamSource in = new StreamSource(new CharArrayReader(caw.toCharArray()));
169 ByteArrayOutputStream bos = new ByteArrayOutputStream();
170 StreamResult result = new StreamResult(new ByteArrayOutputStream());
171 try {
172 if (transformer != null) {
173 transformer.transform(in,result);
174 String enc = transformer.getOutputProperty(OutputKeys.ENCODING);
175 transformedDoc =
176 ((ByteArrayOutputStream)result.getOutputStream()).toString(enc);
177 } else {
178 System.err.println("BrokerTransformer error: Transformer not set");
179 }
180 } catch (Exception ex) {
181 ex.printStackTrace();
182 }
183 }
184 }
185 |
Popular Tags |
Java API By Example, From Geeks To Geeks.