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1
28
29 package com.caucho.xpath.expr;
30
31 import com.caucho.util.CharBuffer;
32 import com.caucho.xpath.Expr;
33 import com.caucho.xpath.ExprEnvironment;
34 import com.caucho.xpath.XPathException;
35 import com.caucho.xpath.XPathFun;
36 import com.caucho.xpath.pattern.AbstractPattern;
37
38 import org.w3c.dom.Node  ;
39
40 import java.util.ArrayList ;
41
42
45 public class FunExpr extends Expr {
46 private String _name;
47 private AbstractPattern _pattern;
48 private ArrayList <Expr> _args;
49
50 public FunExpr(String name, AbstractPattern pattern, ArrayList <Expr> args)
51 {
52 _name = name;
53 _pattern = pattern;
54 _args = args;
55 }
56
57 public boolean evalBoolean(Node node, ExprEnvironment env)
58 throws XPathException
59 {
60 return toBoolean(evalObject(node, env));
61 }
62
63 public double evalNumber(Node node, ExprEnvironment env)
64 throws XPathException
65 {
66 return toDouble(evalObject(node, env));
67 }
68
69 public String evalString(Node node, ExprEnvironment env)
70 throws XPathException
71 {
72 return toString(evalObject(node, env));
73 }
74
75 public Object evalObject(Node node, ExprEnvironment env)
76 throws XPathException
77 {
78 XPathFun fun = env.getFunction(_name);
79
80 if (fun == null)
82 throw new RuntimeException ("unknown function: " + _name);
83
84 ArrayList <Object > values = new ArrayList <Object >();
85 for (int i = 0; i < _args.size(); i++) {
86 Expr expr = _args.get(i);
87 values.add(expr.evalObject(node, env));
88 }
89
90 return fun.eval(node, env, _pattern, values);
91 }
92
93 public String toString()
94 {
95 CharBuffer cb = new CharBuffer();
96 cb.append(_name);
97 cb.append("(");
98 for (int i = 0; i < _args.size(); i++) {
99 if (i != 0)
100 cb.append(", ");
101 cb.append(_args.get(i));
102 }
103 cb.append(")");
104
105 return cb.toString();
106 }
107 }
108 |
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