|
1 package org.jbpm.bpel.data.xpath;
2
3 import java.util.Collections  ;
4 import java.util.List ;
5
6 import org.jaxen.Context;
7 import org.jaxen.FunctionContext;
8 import org.jaxen.JaxenException;
9 import org.jaxen.XPathFunctionContext;
10 import org.jaxen.expr.LocationPath;
11 import org.w3c.dom.Element ;
12
13 import org.jbpm.bpel.xml.util.NodeUtil;
14
15
19 class RelativePath extends XPathScript {
20
21 private static final long serialVersionUID = 1L;
22
23 RelativePath(String snippet) throws JaxenException {
24 super(snippet);
25 }
26
27 protected FunctionContext createFunctionContext() {
28 return XPathFunctionContext.getInstance();
29 }
30
31 protected Context getContext(Object node) {
32 Context context = new Context(getContextSupport());
33 Element element = (Element ) node;
34 context.setNodeSet(Collections.singletonList(element));
35 return context;
36 }
37
38 public Object evaluate(Object contextInfo) {
39 try {
40 List nodeset = selectNodes(contextInfo);
41 return getSingleNode(nodeset);
42 }
43 catch (JaxenException e) {
44 throw new RuntimeException ("Selection failure (internal error)", e);
45 }
46 }
47
48 public void assign(Object contextInfo, Object value) {
49 try {
50 List nodes = selectOrCreateNodes((LocationPath) getRootExpr(), getContext(contextInfo));
51 NodeUtil.setValue(getSingleNode(nodes), value);
52 }
53 catch (JaxenException e) {
54 throw new RuntimeException ("Selection failure (internal error)", e);
55 }
56 }
57 }
58 |
Popular Tags |
Java API By Example, From Geeks To Geeks.