X-Git-Url: http://git.megacz.com/?p=org.ibex.classgen.git;a=blobdiff_plain;f=src%2Forg%2Fibex%2Fclassgen%2FType.java;h=cff979291edb8e143f26ddbff57a7a9743f471b2;hp=8d91aeb0f02f34a207cc1400e693723ec782031a;hb=9271b834f0f1ca988f0374cad6a8cc0cce274ee0;hpb=61c79c5fd88e1017446c804adcafde230f4d90e8
diff --git a/src/org/ibex/classgen/Type.java b/src/org/ibex/classgen/Type.java
index 8d91aeb..cff9792 100644
--- a/src/org/ibex/classgen/Type.java
+++ b/src/org/ibex/classgen/Type.java
@@ -1,121 +1,335 @@
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");
+public abstract class Type implements CGConst {
+
+ private static Hashtable instances = new Hashtable(); // this has to appear at the top of the file
+
+ // Public API //////////////////////////////////////////////////////////////////////////////
+
+ public static final Type VOID = new Primitive("V", "void");
+ public static final Type INT = new Primitive("I", "int");
+ public static final Type LONG = new Primitive("J", "long");
+ public static final Type BOOLEAN = new Primitive("Z", "boolean");
+ public static final Type DOUBLE = new Primitive("D", "double");
+ public static final Type FLOAT = new Primitive("F", "float");
+ public static final Type BYTE = new Primitive("B", "byte");
+ public static final Type CHAR = new Primitive("C", "char");
+ public static final Type SHORT = new Primitive("S", "short");
+ public static final Type NULL = new Null();
- 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 = Type.Class.instance("java.lang.Object");
+ public static final Type.Class STRING = Type.Class.instance("java.lang.String");
+ public static final Type.Class STRINGBUFFER = Type.Class.instance("java.lang.StringBuffer");
+ public static final Type.Class INTEGER_OBJECT = Type.Class.instance("java.lang.Integer");
+ public static final Type.Class DOUBLE_OBJECT = Type.Class.instance("java.lang.Double");
+ public static final Type.Class FLOAT_OBJECT = Type.Class.instance("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+")");
+ /**
+ * A "descriptor" is the classfile-mangled text representation of a type (see JLS section 4.3)
+ * guarantee: there will only be one instance of Type for a given descriptor ==> equals() and == are interchangeable
+ */
+ public static Type fromDescriptor(String d) {
+ Type ret = (Type)instances.get(d);
+ if (ret != null) return ret;
+ if (d.startsWith("[")) return new Type.Array(Type.fromDescriptor(d.substring(1)));
+ return new Type.Class(d);
}
- protected Type(String descriptor) { this.descriptor = descriptor; }
+ public final String getDescriptor() { return descriptor; }
+
+ public Type.Array makeArray() { return (Type.Array)Type.fromDescriptor("["+descriptor); }
+ public Type.Array makeArray(int i) { return i==0 ? (Type.Array)this : makeArray().makeArray(i-1); }
+
+ 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 false; }
+ public boolean isRef() { return false; }
+ public boolean isClass() { return false; }
+ public boolean isArray() { return false; }
+
+ public static Type unify(Type t1, Type t2) {
+ if(t1 == Type.NULL) return t2;
+ if(t2 == Type.NULL) return t1;
+ if((t1 == Type.INT && t2 == Type.BOOLEAN) || (t2 == Type.INT & t1 == Type.BOOLEAN)) return Type.BOOLEAN;
+ if(t1 == t2) return t1;
+ // FIXME: This needs to do a lot more (subclasses, etc)
+ // it probably should be in Context.java
+ return null;
+ }
+
+ public static Type fromArraySpec(int i) {
+ switch(i) {
+ case 4: return Type.BOOLEAN;
+ case 5: return Type.CHAR;
+ case 6: return Type.FLOAT;
+ case 7: return Type.DOUBLE;
+ case 8: return Type.BYTE;
+ case 9: return Type.SHORT;
+ case 10: return Type.INT;
+ case 11: return Type.LONG;
+ default: throw new IllegalStateException("invalid array type");
+ }
+ }
- 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);
+ // Protected/Private //////////////////////////////////////////////////////////////////////////////
+
+ protected final String descriptor;
+
+ protected Type(String descriptor) {
+ this.descriptor = descriptor;
+ instances.put(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 Null extends Type {
+ protected Null() { super(""); } // not really correct....
+ }
+
+ public static class Primitive extends Type {
+ private String humanReadable;
+ Primitive(String descriptor, String humanReadable) {
+ super(descriptor);
+ this.humanReadable = humanReadable;
}
+ public String toString() { return humanReadable; }
+ public boolean isPrimitive() { return true; }
+ }
+
+ public abstract static class Ref extends Type {
+ protected Ref(String descriptor) { super(descriptor); }
+ public abstract String toString();
+ public Type.Ref asRef() { return this; }
+ public boolean isRef() { return true; }
+ }
+ public static class Array extends Type.Ref {
+ public final Type base;
+ protected Array(Type t) { super("[" + t.getDescriptor()); base = t; }
+ public Type.Array asArray() { return this; }
+ public boolean isArray() { return true; }
+ public String toString() { return base.toString() + "[]"; }
+ public Type getElementType() { return base; }
+ }
+
+ public static class Class extends Type.Ref {
+ protected Class(String s) { super(_initHelper(s)); }
+ public Type.Class asClass() { return this; }
+ public boolean isClass() { return true; }
+ public static Type.Class instance(String className) {
+ return (Type.Class)Type.fromDescriptor("L"+className.replace('.', '/')+";"); }
+ public boolean extendsOrImplements(Type.Class c, Context cx) {
+ if (this==c) return true;
+ if (this==OBJECT) return false;
+ ClassFile cf = cx.resolve(getName());
+ if (cf==null) {
+ System.err.println("warning: could not resolve class " + getName());
+ return false;
+ }
+ if (cf.superType == c) return true;
+ for(int i=0; i 0;i++,p=0) {
+ while(p < argsDesc.length() && argsDesc.charAt(p) == '[') p++;
+ if(p == argsDesc.length()) throw new IllegalArgumentException("invalid method type descriptor");
+ if(argsDesc.charAt(p) == 'L') {
+ p = argsDesc.indexOf(';');
+ if(p == -1) throw new IllegalArgumentException("invalid method type descriptor");
+ }
+ argsBuf[i] = Type.fromDescriptor(argsDesc.substring(0,p+1));
+ argsDesc = argsDesc.substring(p+1);
+ }
+ Type args[] = new Type[i];
+ System.arraycopy(argsBuf,0,args,0,i);
+ return method(name, Type.fromDescriptor(retDesc), args);
+ }
+
+ public abstract class Member {
+ public final String name;
+ private Member(String name) { this.name = name; }
+ public Type.Class getDeclaringClass() { return Type.Class.this; }
+ public String getName() { return name; }
+ public abstract String getTypeDescriptor();
+ public abstract String toString();
+ public abstract int hashCode();
+ public abstract boolean equals(Object o);
}
- String internalForm() { throw new Error("Type.Array does not have an internalForm()"); }
- String[] components() { throw new Error("Type.Array does not have components()"); }
- private static String _initHelper(Type t, int dim) {
- StringBuffer sb = new StringBuffer(t.descriptor.length() + dim);
- for(int i=0;i"); }
+ public boolean isClassInitializer() { return getName().equals(""); }
+
+ public String toString() {
+ StringBuffer sb = new StringBuffer();
+ if (name.equals("")) sb.append("static ");
+ else {
+ if (name.equals(""))
+ sb.append(Class.this.getShortName());
+ else
+ sb.append(returnType.toString()).append(" ").append(name);
+ sb.append("(");
+ for(int i=0; i 0) {
+ sb.append("throws");
+ for(java.util.Enumeration e = thrownExceptions.keys();e.hasMoreElements();)
+ sb.append(" ").append(((Type.Class)e.nextElement()).toString()).append(",");
+ sb.setLength(sb.length()-1);
+ sb.append(" ");
+ }
+ if ((flags & (NATIVE|ABSTRACT))==0) {
+ sb.append("{\n");
+ debugBodyToString(sb);
+ sb.append(" }\n");
+ } else {
+ sb.append(";");
+ }
+ }
+ }
+ public int hashCode() {
+ int h = returnType.hashCode() ^ name.hashCode() ^ getDeclaringClass().hashCode();
+ for(int i=0;i