1 package org.ibex.classgen;
3 import java.util.StringTokenizer;
6 public static final Type VOID = new Type("V");
7 public static final Type INT = new Type("I");
8 public static final Type LONG = new Type("J");
9 public static final Type BOOLEAN = new Type("Z");
10 public static final Type DOUBLE = new Type("D");
11 public static final Type FLOAT = new Type("F");
12 public static final Type BYTE = new Type("B");
13 public static final Type CHAR = new Type("C");
14 public static final Type SHORT = new Type("S");
16 public static final Type.Object OBJECT = new Type.Object("java.lang.Object");
17 public static final Type.Object STRING = new Type.Object("java.lang.String");
18 public static final Type.Object STRINGBUFFER = new Type.Object("java.lang.StringBuffer");
19 public static final Type.Object INTEGER_OBJECT = new Type.Object("java.lang.Integer");
20 public static final Type.Object DOUBLE_OBJECT = new Type.Object("java.lang.Double");
21 public static final Type.Object FLOAT_OBJECT = new Type.Object("java.lang.Float");
23 /** A zero element Type[] array (can be passed as the "args" param when a method takes no arguments */
24 public static final Type[] NO_ARGS = new Type[0];
26 final String descriptor;
28 Type(String descriptor) { this.descriptor = descriptor; }
30 /** Returns the Java descriptor string for this object ("I", or "Ljava/lang/String", "[[J", etc */
31 public final String getDescriptor() { return descriptor; }
32 public int hashCode() { return descriptor.hashCode(); }
33 public boolean equals(java.lang.Object o) { return o instanceof Type && ((Type)o).descriptor.equals(descriptor); }
35 /** Returns a one dimensional array type for the base type <i>base</i>
36 @param base The base type
37 @return A one dimensional array of the base type
39 public static Type arrayType(Type base) { return arrayType(base,1); }
40 /** Returns a <i>dim</i> dimensional array type for the base type <i>base</i>
41 @param base The base type
42 @param dim Number if dimensions
43 @return A one dimensional array of the base type
45 public static Type arrayType(Type base, int dim) {
46 StringBuffer sb = new StringBuffer(base.descriptor.length() + dim);
47 for(int i=0;i<dim;i++) sb.append("[");
48 sb.append(base.descriptor);
49 return new Type(sb.toString());
52 /** Class representing Objec types (any non-primitive type) */
53 public static class Object extends Type {
54 /** Create an Type.Object instance for the specified string. <i>s</i> can be a string in the form
55 "java.lang.String", "java/lang/String", or "Ljava/lang/String;".
57 public Object(String s) { super(_initHelper(s)); }
59 private static String _initHelper(String s) {
60 if(!s.startsWith("L") || !s.endsWith(";")) s = "L" + s.replace('.','/') + ";";
61 if(!validDescriptorString(s)) throw new IllegalArgumentException("invalid descriptor string");
65 String[] components() {
66 StringTokenizer st = new StringTokenizer(descriptor.substring(1,descriptor.length()-1),"/");
67 String[] a = new String[st.countTokens()];
68 for(int i=0;st.hasMoreTokens();i++) a[i] = st.nextToken();
72 String internalForm() { return descriptor.substring(1,descriptor.length()-1); }
74 // FEATURE: Do a proper check here (invalid chars, etc)
75 static boolean validDescriptorString(String s) {
76 return s.startsWith("L") && s.endsWith(";");