X-Git-Url: http://git.megacz.com/?p=org.ibex.classgen.git;a=blobdiff_plain;f=src%2Forg%2Fibex%2Fclassgen%2FType.java;h=491cc1227a2194dee33741d1f7e929f441d684ae;hp=8d91aeb0f02f34a207cc1400e693723ec782031a;hb=69b2d27ebab56f1b0e4df2a3a301f4d852439e8e;hpb=61c79c5fd88e1017446c804adcafde230f4d90e8
diff --git a/src/org/ibex/classgen/Type.java b/src/org/ibex/classgen/Type.java
index 8d91aeb..491cc12 100644
--- a/src/org/ibex/classgen/Type.java
+++ b/src/org/ibex/classgen/Type.java
@@ -1,121 +1,145 @@
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;
-
- public String humanReadable() {
- 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";
- throw new Error("confounded by Type("+descriptor+")");
+ /** 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.startsWith("[")) return new Type.Array(instance(d.substring(1)));
+ return new Type.Class(d);
}
- protected 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(descriptor.endsWith("[")) return new Type.Array(fromDescriptor(descriptor.substring(0, descriptor.indexOf('['))),
- descriptor.length() - descriptor.indexOf('['));
- return new Type.Object(descriptor);
+ 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.Array makeArray() { return (Type.Array)instance("["+descriptor); }
+
+ public Type.Ref asRef() { throw new RuntimeException("attempted to use "+this+" as a Type.Ref, which it is not"); }
+ public Type.Class asClass() { throw new RuntimeException("attempted to use "+this+" as a Type.Class, which it is not"); }
+ public Type.Array asArray() { throw new RuntimeException("attempted to use "+this+" as a Type.Array, which it is not"); }
+ public boolean isPrimitive() { return !isRef(); }
+ public boolean isRef() { return false; }
+ public boolean isClass() { 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);
}
-
- /** 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); }
-
- public String toString() { return getDescriptor(); }
- 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 Type.Array makeArray(int dim) { return new Type.Array(this, dim); }
- public boolean isObject() { return false; }
- public boolean isArray() { return false; }
-
- /** Class representing Object types (any non-primitive type) */
- public static class Object extends Type {
- /** Create an Type.Object instance for the specified string. s can be a string in the form
- "java.lang.String", "java/lang/String", or "Ljava/lang/String;".
- @param s The type */
- protected Object(String s) { super(_initHelper(s)); }
- public Type.Object asObject() { return this; }
- public boolean isObject() { return true; }
- public String humanReadable() { return internalForm().replace('/', '.'); }
- public String getShortName() {
- String hr = humanReadable();
- return hr.substring(hr.lastIndexOf('.')+1);
- }
+ 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 (!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), "/");
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); }
+
+ public Method method(String name, Type returnType, Type[] argTypes) { return new Method(name, returnType, argTypes); }
+ public Field field(String name, Type type) { return new Field(name, type); }
+
+ public abstract class Member {
+ public final String name;
+ private Member(String name) { this.name = name; }
+ public Type.Class getDeclaringClass() { return Type.Class.this; }
+ public abstract String getDescriptor();
+ public boolean equals(Object o_) {
+ if(!(o_ instanceof Member)) return false;
+ Member o = (Member) o_;
+ return o.getDeclaringClass().equals(getDeclaringClass()) &&
+ o.name.equals(name) &&
+ o.getDescriptor().equals(getDescriptor());
+ }
+ public int hashCode() { return getDeclaringClass().hashCode() ^ name.hashCode() ^ getDescriptor().hashCode(); }
+ }
+
+ public class Field extends Member {
+ /** Create a reference to field name of class c with the type t */
+ public final Type type;
+ private Field(String name, Type t) { super(name); this.type = t; }
+ public String getDescriptor() { return name; }
+ }
+
+ public class Method extends Member {
+ final Type[] argTypes;
+ final Type returnType;
+ private Method(String name, Type returnType, Type[] argTypes) {
+ super(name);
+ this.argTypes = argTypes;
+ this.returnType = returnType;
+ }
+ public String getDescriptor() {
+ StringBuffer sb = new StringBuffer(argTypes.length*4);
+ sb.append("(");
+ for(int i=0;i