X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fibex%2Fclassgen%2FType.java;h=a8a68d8d651e0e1e1ac9ff2e06e48fbf610c7228;hb=bb2af36ca9c48b45def87670c13dfbb80764e281;hp=ec5a30a83363075e43743f2a177293bfe7080108;hpb=30a333241756f2eb395336ffbdb0038000b0bb56;p=org.ibex.classgen.git diff --git a/src/org/ibex/classgen/Type.java b/src/org/ibex/classgen/Type.java index ec5a30a..a8a68d8 100644 --- a/src/org/ibex/classgen/Type.java +++ b/src/org/ibex/classgen/Type.java @@ -1,92 +1,101 @@ package org.ibex.classgen; import java.util.StringTokenizer; +import java.util.Hashtable; public class Type { - public static final Type VOID = new Type("V"); - public static final Type INT = new Type("I"); - public static final Type LONG = new Type("J"); - public static final Type BOOLEAN = new Type("Z"); - public static final Type DOUBLE = new Type("D"); - public static final Type FLOAT = new Type("F"); - public static final Type BYTE = new Type("B"); - public static final Type CHAR = new Type("C"); - public static final Type SHORT = new Type("S"); + + private static Hashtable instances = new Hashtable(); // this has to appear at the top of the file + + // Public API ////////////////////////////////////////////////////////////////////////////// + + public static final Type VOID = new Type("V", "void"); + public static final Type INT = new Type("I", "int"); + public static final Type LONG = new Type("J", "long"); + public static final Type BOOLEAN = new Type("Z", "boolean"); + public static final Type DOUBLE = new Type("D", "double"); + public static final Type FLOAT = new Type("F", "float"); + public static final Type BYTE = new Type("B", "byte"); + public static final Type CHAR = new Type("C", "char"); + public static final Type SHORT = new Type("S", "short"); - public static final Type.Object OBJECT = new Type.Object("java.lang.Object"); - public static final Type.Object STRING = new Type.Object("java.lang.String"); - public static final Type.Object STRINGBUFFER = new Type.Object("java.lang.StringBuffer"); - public static final Type.Object INTEGER_OBJECT = new Type.Object("java.lang.Integer"); - public static final Type.Object DOUBLE_OBJECT = new Type.Object("java.lang.Double"); - public static final Type.Object FLOAT_OBJECT = new Type.Object("java.lang.Float"); + public static final Type.Class OBJECT = new Type.Class("java.lang.Object"); + public static final Type.Class STRING = new Type.Class("java.lang.String"); + public static final Type.Class STRINGBUFFER = new Type.Class("java.lang.StringBuffer"); + public static final Type.Class INTEGER_OBJECT = new Type.Class("java.lang.Integer"); + public static final Type.Class DOUBLE_OBJECT = new Type.Class("java.lang.Double"); + public static final Type.Class FLOAT_OBJECT = new Type.Class("java.lang.Float"); /** A zero element Type[] array (can be passed as the "args" param when a method takes no arguments */ public static final Type[] NO_ARGS = new Type[0]; - final String descriptor; - - Type(String descriptor) { this.descriptor = descriptor; } - - public static Type fromDescriptor(String descriptor) { - if(descriptor.equals("V")) return VOID; - if(descriptor.equals("I")) return INT; - if(descriptor.equals("J")) return LONG; - if(descriptor.equals("Z")) return BOOLEAN; - if(descriptor.equals("D")) return DOUBLE; - if(descriptor.equals("F")) return FLOAT; - if(descriptor.equals("B")) return BYTE; - if(descriptor.equals("C")) return CHAR; - if(descriptor.equals("S")) return SHORT; - if(Type.Object.validDescriptorString(descriptor)) return new Type.Object(descriptor); - return null; + /** guarantee: there will only be one instance of Type for a given descriptor ==> equals() and == are interchangeable */ + public static Type instance(String d) { + Type ret = (Type)instances.get(d); + if (ret != null) return ret; + if (d.endsWith("[")) return new Type.Array(instance(d.substring(d.length()-1))); + return new Type.Class(d); } - - /** Returns the Java descriptor string for this object ("I", or "Ljava/lang/String", "[[J", etc */ - public final String getDescriptor() { return descriptor; } - public int hashCode() { return descriptor.hashCode(); } - public boolean equals(java.lang.Object o) { return o instanceof Type && ((Type)o).descriptor.equals(descriptor); } - - /** Returns a one dimensional array type for the base type base - @param base The base type - @return A one dimensional array of the base type - */ - public static Type arrayType(Type base) { return arrayType(base,1); } - /** Returns a dim dimensional array type for the base type base - @param base The base type - @param dim Number if dimensions - @return A one dimensional array of the base type - */ - public static Type arrayType(Type base, int dim) { - StringBuffer sb = new StringBuffer(base.descriptor.length() + dim); - for(int i=0;is can be a string in the form - "java.lang.String", "java/lang/String", or "Ljava/lang/String;". - @param s The type */ - public Object(String s) { super(_initHelper(s)); } - + + public static class Ref extends Type { + protected Ref(String descriptor) { super(descriptor); } + protected Ref(String descriptor, String humanReadable) { super(descriptor, humanReadable); } + public Type.Ref asRef() { return this; } + public boolean isRef() { return true; } + } + + public static class Class extends Type.Ref { + protected Class(String s) { super(_initHelper(s), _initHelper2(s)); } + public Type.Class asClass() { return this; } + public boolean isClass() { return true; } + public String getShortName() { return toString.substring(toString.lastIndexOf('.')+1); } + String internalForm() { return descriptor.substring(1, descriptor.length()-1); } private static String _initHelper(String s) { - if(!s.startsWith("L") || !s.endsWith(";")) s = "L" + s.replace('.','/') + ";"; - if(!validDescriptorString(s)) throw new IllegalArgumentException("invalid descriptor string"); + if (!s.startsWith("L") || !s.endsWith(";")) s = "L" + s.replace('.', '/') + ";"; return s; } - + private static String _initHelper2(String s) { + if (s.startsWith("L") && s.endsWith(";")) s = s.substring(1, s.length()-1); + return s.replace('/', '.'); + } String[] components() { - StringTokenizer st = new StringTokenizer(descriptor.substring(1,descriptor.length()-1),"/"); + StringTokenizer st = new StringTokenizer(descriptor.substring(1, descriptor.length()-1), "/"); String[] a = new String[st.countTokens()]; for(int i=0;st.hasMoreTokens();i++) a[i] = st.nextToken(); return a; } - - String internalForm() { return descriptor.substring(1,descriptor.length()-1); } - - static boolean validDescriptorString(String s) { - return s.startsWith("L") && s.endsWith(";"); - } } + + public static class Array extends Type.Ref { + protected Array(Type t) { super(t.getDescriptor() + "[", t.toString() + "[]"); } + public Type.Array asArray() { return this; } + public boolean isArray() { return true; } + public int dimension() { return descriptor.length() - descriptor.indexOf('['); } + } + }