X-Git-Url: http://git.megacz.com/?p=org.ibex.classgen.git;a=blobdiff_plain;f=src%2Forg%2Fibex%2Fclassgen%2FType.java;h=0a35c653fecb9e72fbe8c6093ec8e62325f06c66;hp=dd73d70216cfe1bf9b9bbab2ca47a2b61aba3ff6;hb=be231cfa8ce0eac52873b9f0f82b8aecca9c458a;hpb=bc9112573cba51be5e7d285ccd3e496be4278c63 diff --git a/src/org/ibex/classgen/Type.java b/src/org/ibex/classgen/Type.java index dd73d70..0a35c65 100644 --- a/src/org/ibex/classgen/Type.java +++ b/src/org/ibex/classgen/Type.java @@ -1,14 +1,23 @@ 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"); + + 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"); @@ -17,44 +26,68 @@ public class Type { 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"); + /** 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]; - String descriptor; - - Type() { } - Type(String descriptor) { this.descriptor = descriptor; } - - public final String getDescriptor() { return descriptor; } - public int hashCode() { return descriptor.hashCode(); } - public boolean equals(Object o) { return o instanceof Type && ((Type)o).descriptor.equals(descriptor); } - - public static Type arrayType(Type base) { return arrayType(base,1); } - public static Type arrayType(Type base, int dim) { - StringBuffer sb = new StringBuffer(base.descriptor.length() + dim); - for(int i=0;i equals() and == are interchangeable */ + public static Type fromDescriptor(String d) { + Type ret = (Type)instances.get(d); + if (ret != null) return ret; + if (d.endsWith("[")) return new Type.Array(fromDescriptor(d.substring(d.length()-1))); + return new Type.Object(d); } - + + public String toString() { return toString; } + public final String getDescriptor() { return descriptor; } + public int hashCode() { return descriptor.hashCode(); } + public boolean equals(java.lang.Object o) { return this==o; } + + public Type.Object asObject() { throw new RuntimeException("attempted to use "+this+" as a Type.Object, which it is not"); } + public Type.Array asArray() { throw new RuntimeException("attempted to use "+this+" as a Type.Array, which it is not"); } + public Type.Array makeArray() { return new Type.Array(this); } + public boolean isObject() { return false; } + public boolean isArray() { return false; } + + // Protected/Private ////////////////////////////////////////////////////////////////////////////// + + protected final String descriptor; + protected final String toString; + protected Type(String descriptor) { this(descriptor, descriptor); } + protected Type(String descriptor, String humanReadable) { + this.toString = humanReadable; + instances.put(this.descriptor = descriptor, this); + } + + /** Class representing Object types (any non-primitive type) */ public static class Object extends Type { - public Object(String s) { - if(!s.startsWith("L") || !s.endsWith(";")) s = "L" + s.replace('.','/') + ";"; - if(!validDescriptorString(s)) throw new IllegalArgumentException("invalid descriptor string"); - descriptor = s; + protected Object(String s) { super(_initHelper(s), _initHelper2(s)); } + protected Object(String descriptor, String hr) { super(_initHelper(descriptor), _initHelper2(hr)); } + public Type.Object asObject() { return this; } + public boolean isObject() { 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('.', '/') + ";"; + return s; + } + private static String _initHelper2(String s) { + if (s.startsWith("L") && s.endsWith(";")) s = s.substring(1, s.length()-1); + return s.replace('/', '.'); } - - public String[] components() { - StringTokenizer st = new StringTokenizer(descriptor.substring(1,descriptor.length()-1),"/"); + String[] components() { + 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; } - - public String internalForm() { return descriptor.substring(1,descriptor.length()-1); } - - // FEATURE: Do a proper check here (invalid chars, etc) - public boolean validDescriptorString(String s) { - return s.startsWith("L") && s.endsWith(";"); - } } + + public static class Array extends Type.Object { + 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('['); } + String[] components() { throw new Error("Type.Array does not have components()"); } + } + }