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Java > Open Source Codes > org > jruby > runtime > MethodIndex


1 /*
2  * MethodIndex.java
3  *
4  * Created on January 1, 2007, 7:39 PM
5  *
6  * To change this template, choose Tools | Template Manager
7  * and open the template in the editor.
8  */
9
10 package org.jruby.runtime;
11
12 /**
13  *
14  * @author headius
15  */
16 public class MethodIndex {
17     public static final byte NO_INDEX = 0;
18     public static final byte OP_PLUS = 1;
19     public static final byte OP_MINUS = 2;
20     public static final byte OP_LT = 3;
21     public static final byte AREF = 4;
22     public static final byte ASET = 5;
23     public static final byte POP = 6;
24     public static final byte PUSH = 7;
25     public static final byte NIL_P = 8;
26     public static final byte EQUALEQUAL = 9;
27     public static final byte UNSHIFT = 10;
28     public static final byte OP_GE = 11;
29     public static final byte OP_LSHIFT = 12;
30     public static final byte EMPTY_P = 13;
31     public static final byte MAX_METHODS = 14;
32     
33     /** Creates a new instance of MethodIndex */
34     public MethodIndex() {
35     }
36     
37     public static byte getIndex(String JavaDoc methodName) {
38         if (methodName.length() == 1) {
39             switch (methodName.charAt(0)) {
40                 case '+': return OP_PLUS;
41                 case '-': return OP_MINUS;
42                 case '<': return OP_LT;
43                 default: return NO_INDEX;
44             }
45         }
46         if (methodName == "[]") return AREF;
47         if (methodName == "[]=") return ASET;
48         if (methodName == "pop") return POP;
49         if (methodName == "push") return PUSH;
50         if (methodName == "nil?") return NIL_P;
51         if (methodName == "==") return EQUALEQUAL;
52         if (methodName == "unshift") return UNSHIFT;
53         if (methodName == ">=") return OP_GE;
54         if (methodName == "<<") return OP_LSHIFT;
55         if (methodName == "empty?") return EMPTY_P;
56         return NO_INDEX;
57     }
58 }
59
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