|
1
5
6 package com.hp.hpl.jena.rdql.parser;
7
8
9 import java.io.PrintWriter  ;
10 import com.hp.hpl.jena.graph.query.IndexValues;
11 import com.hp.hpl.jena.graph.query.Expression ;
12 import com.hp.hpl.jena.rdql.*;
13
14
21
22
26
27 public class Q_LessThanOrEqual extends ExprNode implements Expr, ExprBoolean
28 {
29 Expr left ;
30 Expr right ;
31
32 private String printName = "le" ;
33 private String opSymbol = "<=" ;
34
35 Q_LessThanOrEqual(int id) { super(id); }
36
37 Q_LessThanOrEqual(RDQLParser p, int id) { super(p, id); }
38
39 public NodeValue eval(Query q, IndexValues env)
40 {
41 NodeValue x = left.eval(q, env) ;
42 NodeValue y = right.eval(q, env) ;
43
44 if ( ! x.isNumber() )
45 throw new EvalTypeException("Q_LessThanOrEqual: Wanted a numeric: "+x) ;
46 if ( ! y.isNumber() )
47 throw new EvalTypeException("Q_LessThanOrEqual: Wanted a numeric: "+y) ;
48
49 NodeValueSettable result ;
50 if ( x instanceof NodeValueSettable )
51 result = (NodeValueSettable)x ;
52 else if ( y instanceof NodeValueSettable )
53 result = (NodeValueSettable)y ;
54 else
55 result = new WorkingVar() ;
56
57 boolean b ;
58
59 if ( x.isInt() && y.isInt() )
60 b = (x.getInt() <= y.getInt()) ;
61 else
62 b = (x.getDouble() <= y.getDouble()) ;
63
64 result.setBoolean(b) ;
65 return result ;
66 }
67
68 public void jjtClose()
69 {
70 int n = jjtGetNumChildren() ;
71 if ( n != 2 )
72 throw new QueryException("Q_LessThanOrEqual: Wrong number of children: "+n) ;
73
74 left = (Expr)jjtGetChild(0) ;
75 right = (Expr)jjtGetChild(1) ;
76 }
77
78
81 public boolean isApply() { return true ; }
82 public String getFun() { return super.constructURI(this.getClass().getName()) ; }
83 public int argCount() { return 2; }
84 public Expression getArg(int i)
85 {
86 if ( i == 0 && left instanceof Expression )
87 return (Expression)left ;
88 if ( i == 1 && right instanceof Expression )
89 return (Expression)right ;
90 return null;
91 }
92
93 public String asInfixString()
94 {
95 return QueryPrintUtils.asInfixString2(left, right, printName, opSymbol) ;
96 }
97
98 public String asPrefixString()
99 {
100 return QueryPrintUtils.asPrefixString(left, right, printName, opSymbol) ;
101 }
102
103 public void print(PrintWriter pw, int level)
104 {
105 QueryPrintUtils.print(pw, left, right, printName, opSymbol, level) ;
106 }
107
108 public String toString()
109 {
110 return asInfixString() ;
111 }
112 }
113
114
140 |
Popular Tags |
Java API By Example, From Geeks To Geeks.