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1
28
29 package com.caucho.xpath.functions;
30
31 import com.caucho.util.L10N;
32 import com.caucho.xml.XmlPrinter;
33 import com.caucho.xpath.Expr;
34 import com.caucho.xpath.ExprEnvironment;
35 import com.caucho.xpath.XPathException;
36 import com.caucho.xpath.XPathParseException;
37 import com.caucho.xpath.expr.AbstractStringExpr;
38 import com.caucho.xpath.pattern.NodeIterator;
39
40 import org.w3c.dom.Node  ;
41
42 import java.io.IOException ;
43
44
47 public class Trace extends AbstractStringExpr {
48 private static final L10N L = new L10N(ResolveURI.class);
49
50 private Expr _expr;
51 private Expr _labelExpr;
52
53 public Trace(Expr expr, Expr labelExpr)
54 throws XPathParseException
55 {
56 _expr = expr;
57 _labelExpr = labelExpr;
58
59 if (expr == null)
60 throw new XPathParseException(L.l("fn:trace(value,[label])"));
61 }
62
63
71 public String evalString(Node node, ExprEnvironment env)
72 throws XPathException
73 {
74 Object value = _expr.evalObject(node, env);
75
76 if (value instanceof NodeIterator) {
77 NodeIterator iter = (NodeIterator) value;
78
79 while (iter.hasNext()) {
80 Node subnode = iter.next();
81
82 XmlPrinter printer = new XmlPrinter(System.out);
83
84 try {
85 printer.printPrettyXml(subnode);
86 } catch (IOException e) {
87 }
88 }
89 }
90 else if (value instanceof Node ) {
91 Node subnode = (Node ) value;
92
93 XmlPrinter printer = new XmlPrinter(System.out);
94
95 try {
96 printer.printPrettyXml(subnode);
97 } catch (IOException e) {
98 }
99 }
100 else
101 System.out.println(value);
102
103 return "";
104 }
105
106 public String toString()
107 {
108 return "fn:trace(" + _expr + ")";
109 }
110 }
111 |
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