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1 package com.openinventions.webappfilter.processor;
2
3 import com.openinventions.metaframework.*;
4 import com.openinventions.webappfilter.processor.xpathexpression.*;
5 import java.io.*;
6 import org.apache.commons.logging.*;
7
8 public class XPathExpression implements Processor {
9 private static final Log log = LogFactory.getLog(XPathExpression.class);
10
11 public void process(State state, Element context) throws Exception  {
12 if (log.isDebugEnabled()) {
13 log.debug("context.getValue() = " + context.getValue());
14 }
15
16 String [] lines = context.getValue().split(";");
17 for (int i = 0; i < lines.length; i++) {
18 String line = lines[i].trim();
19 if ((line == null) || (line.equals(""))) {
20 continue;
21 }
22
23 int equalIndex = line.indexOf("=");
24 if (equalIndex < 0) {
25 log.warn("expected equals " + line);
26 continue;
27 }
28
29 String left = line.substring(0, equalIndex);
30 if (!left.startsWith("/")) {
31 log.warn("expected left side of equals to start with slash " + line);
32 continue;
33 }
34
35 String right = line.substring(equalIndex + 1, line.length());
36 if (log.isDebugEnabled()) {
37 log.debug("right = " + right);
38 }
39 Object o = new XPathExpressionParser(new StringReader(right)).parse(state);
40
41 stateSet(state, left, o);
42 }
43 }
44
45 private void stateSet(State state, String left, Object o) throws Exception {
46 if (log.isDebugEnabled()) {
47 log.debug("left = " + left);
48 log.debug("o = " + o);
49 log.debug("o.getClass().getName() = " + o.getClass().getName());
50 }
51
52 int slash = left.indexOf("/", 1);
53 String name = "";
54 String path = "";
55
56 if (slash < 0) {
57 name = left.substring(1).trim();
58 if (log.isDebugEnabled()) {
59 log.debug("name = " + name);
60 log.debug("o = " + o);
61 }
62 state.set(name, o);
63 } else {
64 Element element = null;
65 name = left.substring(1, slash).trim();
66 path = left.substring(slash);
67
68 if (!state.isExists(name)) {
69 ElementFactory factory = (ElementFactory) state.get("com.openinventions.metaframework.ElementFactory");
70 element = factory.createElement(name);
71 } else {
72 element = (Element) state.get(name);
73 }
74
75 if (o instanceof String ) {
76 element.setValue(path, (String ) o);
77 } else if (o instanceof Element) {
78 element.setElement(path, (Element) o);
79 } else {
80 log.error("not expecting = " + o);
81 }
82
83 if (log.isDebugEnabled()) {
84 log.debug("name = " + name);
85 log.debug("element = " + element);
86 }
87 state.set(name, element);
88 }
89 }
90 }
91
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143
144
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