X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fibex%2Fclassgen%2FType.java;h=491e3bb3c5637b6992c5193687af047815dbc866;hb=11cdbef43dc7391d2e1a7d38a38994934a504d34;hp=07e8d7835eff8c32442ee1898064227dcbbace10;hpb=60bace637897ca9710e91707d0bb8d31a420a3a9;p=org.ibex.classgen.git

diff --git a/src/org/ibex/classgen/Type.java b/src/org/ibex/classgen/Type.java
index 07e8d78..491e3bb 100644
--- a/src/org/ibex/classgen/Type.java
+++ b/src/org/ibex/classgen/Type.java
@@ -3,7 +3,7 @@ package org.ibex.classgen;
 import java.util.StringTokenizer;
 import java.util.Hashtable;
 
-public class Type implements CGConst {
+public abstract class Type implements CGConst {
 
     private static Hashtable instances = new Hashtable();  // this has to appear at the top of the file
 
@@ -19,21 +19,24 @@ public class Type implements CGConst {
     public static final Type CHAR = new Primitive("C", "char");
     public static final Type SHORT = new Primitive("S", "short");
     
-    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");
+    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];
     
-    /** guarantee: there will only be one instance of Type for a given descriptor ==> equals() and == are interchangeable */
-    public static Type instance(String d) {
+    /** 
+     *  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(instance(d.substring(1)));
+        if (d.startsWith("[")) return new Type.Array(Type.fromDescriptor(d.substring(1)));
         return new Type.Class(d);
     }
 
@@ -41,10 +44,8 @@ public class Type implements CGConst {
     public abstract String debugToString();
     
     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.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"); }
@@ -64,9 +65,9 @@ public class Type implements CGConst {
         instances.put(descriptor, this);
     }
 
-    static class Primitive extends Type {
+    public static class Primitive extends Type {
         private String humanReadable;
-        protected Primitive(String descriptor, String humanReadable) {
+        Primitive(String descriptor, String humanReadable) {
             super(descriptor);
             this.humanReadable = humanReadable;
         }
@@ -87,22 +88,37 @@ public class Type implements CGConst {
         public Type.Array asArray() { return this; }
         public boolean isArray() { return true; }
         public String debugToString() { return base.debugToString() + "[]"; }
-        public Type getElementType() { return Type.instance(getDescriptor().substring(0, getDescriptor().length()-1)); }
+        public Type getElementType() { return Type.fromDescriptor(getDescriptor().substring(0, getDescriptor().length()-1)); }
     }
 
     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 String getShortName() { return toString.substring(toString.lastIndexOf('.')+1); }
+        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<cf.interfaces.length; i++) if (cf.interfaces[i].extendsOrImplements(c,cx)) return true;
+            if (cf.superType == null) return false;
+            return cf.superType.extendsOrImplements(c, cx);
+        }
         String internalForm() { return descriptor.substring(1, descriptor.length()-1); }
         public String debugToString() { return internalForm().replace('/','.'); }
+        public String getName() { return internalForm().replace('/','.'); }
         public String getShortName() {
             int p = descriptor.lastIndexOf('/');
             return p == -1 ? descriptor.substring(1,descriptor.length()-1) : descriptor.substring(p+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(";")) throw new Error("invalid");
             return s;
         }
         String[] components() {
@@ -112,11 +128,27 @@ public class Type implements CGConst {
             return a;
         }
 
-        public Field  field(String name, Type type) { return new Field(name, type); }
+        public Type.Class.Body getBody(Context cx) { return cx.resolve(this.getName()); }
+        public abstract class Body extends HasAttributes {
+            public abstract Type.Class.Method.Body[] methods();
+            public abstract Type.Class.Field.Body addField(Type.Class.Field field, int flags);
+            public abstract Type.Class.Field.Body[] fields();
+            public Body(int flags, ClassFile.AttrGen attrs) {
+                super(flags, attrs);
+                if ((flags & ~(PUBLIC|FINAL|SUPER|INTERFACE|ABSTRACT)) != 0)
+                    throw new IllegalArgumentException("invalid flags: " + Integer.toString(flags,16));
+            }
+        }
+
+        public Field field(String name, Type type) { return new Field(name, type); }
+        public Field field(String name, String descriptor) { return field(name,Type.fromDescriptor(descriptor)); }
+
         public Method method(String name, Type returnType, Type[] argTypes) { return new Method(name, returnType, argTypes); }
-        public Method method(String name, String typeDescriptor) {
+
+        /** see JVM Spec section 2.10.2 */
+        public Method method(String name, String descriptor) {
             // FEATURE: This parser is ugly but it works (and shouldn't be a problem) might want to clean it up though
-            String s = typeDescriptor;
+            String s = descriptor;
             if(!s.startsWith("(")) throw new IllegalArgumentException("invalid method type descriptor");
             int p = s.indexOf(')');
             if(p == -1) throw new IllegalArgumentException("invalid method type descriptor");
@@ -131,28 +163,20 @@ public class Type implements CGConst {
                     p = argsDesc.indexOf(';');
                     if(p == -1) throw new IllegalArgumentException("invalid method type descriptor");
                 }
-                argsBuf[i] = Type.instance(argsDesc.substring(0,p+1));
+                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.instance(retDesc), args);
+            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 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 String toString() { return debugToString(); }
+            public String getName() { return name; }
+            public abstract String getTypeDescriptor();
             public abstract String debugToString();
         }
     
@@ -161,7 +185,14 @@ public class Type implements CGConst {
             private Field(String name, Type t) { super(name); this.type = t; }
             public String getTypeDescriptor() { return type.getDescriptor(); }
             public Type getType() { return type; }
-            public String debugToString() { return getDeclaringClass()+"."+name+"["+type+"]"; }
+            public String debugToString() { return getDeclaringClass().debugToString()+"."+name+"["+type.debugToString()+"]"; }
+            public class Body extends HasAttributes {
+                public Field getField() { return Field.this; }
+                public Body(int flags, ClassFile.AttrGen attrs) {
+                    super(flags, attrs);
+                    if ((flags & ~VALID_FIELD_FLAGS) != 0) throw new IllegalArgumentException("invalid flags");
+                }
+            }
         }
 
         public class Method extends Member {
@@ -175,7 +206,6 @@ public class Type implements CGConst {
                 System.arraycopy(argTypes, 0, ret, 0, ret.length);
                 return ret;
             }
-
             public boolean isConstructor() { return getName().equals("<init>"); }
             public boolean isClassInitializer() { return getName().equals("<clinit>"); }
             public String debugToString() {
@@ -198,7 +228,8 @@ public class Type implements CGConst {
                 this.argTypes = argTypes;
                 this.returnType = returnType;
             }
-            public String getDescriptor() {
+            //public Method.Body getBody(Context cx) { }
+            public String getTypeDescriptor() {
                 StringBuffer sb = new StringBuffer(argTypes.length*4);
                 sb.append("(");
                 for(int i=0;i<argTypes.length;i++) sb.append(argTypes[i].getDescriptor());
@@ -206,9 +237,14 @@ public class Type implements CGConst {
                 sb.append(returnType.getDescriptor());
                 return sb.toString();
             }
-            public abstract class Body extends HasFlags {
+            public abstract class Body extends HasAttributes {
                 public abstract java.util.Hashtable getThrownExceptions();
                 public abstract void debugBodyToString(StringBuffer sb);
+                public Method getMethod() { return Method.this; }
+                public Body(int flags, ClassFile.AttrGen attrs) {
+                    super(flags, attrs);
+                    if ((flags & ~VALID_METHOD_FLAGS) != 0) throw new IllegalArgumentException("invalid flags");
+                }
                 public void debugToString(StringBuffer sb, String constructorName) {
                     int flags = getFlags();
                     sb.append("  ").append(ClassFile.flagsToString(flags,false));