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1 package org.jbpm.bpel.xml;
2
3 import java.io.IOException  ;
4 import java.util.Iterator ;
5
6 import javax.xml.parsers.DocumentBuilder ;
7
8 import org.w3c.dom.Element ;
9 import org.xml.sax.InputSource ;
10 import org.xml.sax.SAXException ;
11
12 import org.jbpm.bpel.def.Import;
13 import org.jbpm.bpel.par.ParDefinition;
14 import org.jbpm.bpel.xml.util.NodeUtil;
15 import org.jbpm.jpdl.xml.Problem;
16
17
21 public class ParDescriptorReader {
22
23 private static final ParDescriptorReader INSTANCE = new ParDescriptorReader();
24
25 private DocumentBuilder builder;
26 private ProblemHandler problemHandler;
27
28 protected ParDescriptorReader() {
29 builder = NodeUtil.getDocumentBuilder();
30 }
31
32 public void read(ParDefinition definition, InputSource input) {
33 try {
34 ErrorHandlerAdapter validationHandler = new ErrorHandlerAdapter(getProblemHandler());
36 builder.setErrorHandler(validationHandler);
37 Element definitionElem = builder.parse(input).getDocumentElement();
38
39 if( !validationHandler.hasErrors() ) {
40 String location = definitionElem.getAttribute(BpelConstants.ATTR_LOCATION);
42 definition.setLocation(location);
43 Element importsElem = NodeUtil.getElement(definitionElem, BpelConstants.NS_VENDOR, BpelConstants.ELEM_IMPORTS);
45 if (importsElem != null) {
46 readImports(importsElem, definition);
47 }
48 }
49 }
50 catch (SAXException e) {
51 getProblemHandler().add(
52 new Problem( Problem.LEVEL_ERROR, "bar descriptor contains invalid xml", e) );
53 }
54 catch (IOException e) {
55 getProblemHandler().add(
56 new Problem( Problem.LEVEL_ERROR, "par descriptor is not readable", e) );
57 }
58 }
59
60 public void readImports(Element importsElem, ParDefinition definition) {
61 Iterator importElemIt = NodeUtil.getElements(importsElem, BpelConstants.NS_VENDOR);
62 while (importElemIt.hasNext()) {
63 Element importElem = (Element ) importElemIt.next();
64 Import imp = readImport(importElem);
65 definition.addImport(imp);
66 }
67 }
68
69 public Import readImport(Element importElem) {
70 Import imp = new Import();
71 imp.setNamespace(importElem.getAttribute(BpelConstants.ATTR_NAMESPACE));
72 imp.setLocation(importElem.getAttribute(BpelConstants.ATTR_LOCATION));
73 String importName = importElem.getLocalName();
74 if (BpelConstants.ELEM_WSDL.equals(importName)) {
75 imp.setType(Import.Type.WSDL);
76 }
77 else if (BpelConstants.ELEM_XML_SCHEMA.equals(importName)) {
78 imp.setType(Import.Type.XML_SCHEMA);
79 }
80 return imp;
81 }
82
83 public void setProblemHandler(ProblemHandler problemHandler) {
84 this.problemHandler = problemHandler;
85 }
86
87 protected ProblemHandler getProblemHandler() {
88 if(problemHandler == null) {
89 problemHandler = new DefaultProblemHandler();
90 }
91 return problemHandler;
92 }
93
94 public static ParDescriptorReader getInstance() {
95 return INSTANCE;
96 }
97 }
98 |
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