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
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.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);
}
- public final String toString() { return super.toString(); }
- 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"); }
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");
+ }
+ }
+
// Protected/Private //////////////////////////////////////////////////////////////////////////////
protected final String descriptor;
this.descriptor = descriptor;
instances.put(descriptor, this);
}
+
+ public static class Null extends Type {
+ protected Null() { super(""); } // not really correct....
+ }
- 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;
}
- public String debugToString() { return 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 debugToString();
+ public abstract String toString();
public Type.Ref asRef() { return this; }
public boolean isRef() { return true; }
}
protected Array(Type t) { super("[" + t.getDescriptor()); base = t; }
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 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 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 toString() { 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: " + s);
return s;
}
String[] components() {
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[] 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");
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 abstract String debugToString();
+ public String getName() { return name; }
+ public abstract String getTypeDescriptor();
+ public abstract String toString();
+ public abstract int hashCode();
+ public abstract boolean equals(Object o);
}
public class Field extends Member {
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 toString() { return getDeclaringClass().toString()+"."+name+"["+type.toString()+"]"; }
+ 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 int hashCode() {
+ return type.hashCode() ^ name.hashCode() ^ getDeclaringClass().hashCode();
+ }
+ public boolean equals(Object o_) {
+ if(o_ == this) return true;
+ if(!(o_ instanceof Field)) return false;
+ Field o = (Field) o_;
+ return o.getDeclaringClass() == getDeclaringClass() && o.type == type && o.name.equals(name);
+ }
}
public class Method extends Member {
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() {
+
+ public String toString() {
StringBuffer sb = new StringBuffer();
if (name.equals("<clinit>")) sb.append("static ");
else {
if (name.equals("<init>"))
sb.append(Class.this.getShortName());
else
- sb.append(returnType.debugToString()).append(".").append(name);
+ sb.append(returnType.toString()).append(" ").append(name);
sb.append("(");
for(int i=0; i<argTypes.length; i++)
- sb.append((i==0?"":", ")+argTypes[i].debugToString());
+ sb.append((i==0?"":", ")+argTypes[i].toString());
sb.append(") ");
}
return sb.toString();
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());
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 void debugToString(StringBuffer sb, String constructorName) {
+ 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 boolean isConcrete() { return !isAbstract() && !isNative() /*FIXME: !inAnInterface*/; }
+ public void toString(StringBuffer sb, String constructorName) {
int flags = getFlags();
sb.append(" ").append(ClassFile.flagsToString(flags,false));
- sb.append(Method.this.debugToString());
+ sb.append(Method.this.toString());
java.util.Hashtable thrownExceptions = getThrownExceptions();
if (thrownExceptions.size() > 0) {
sb.append("throws");
for(java.util.Enumeration e = thrownExceptions.keys();e.hasMoreElements();)
- sb.append(" ").append(((Type.Class)e.nextElement()).debugToString()).append(",");
+ sb.append(" ").append(((Type.Class)e.nextElement()).toString()).append(",");
sb.setLength(sb.length()-1);
sb.append(" ");
}
}
}
}
+ public int hashCode() {
+ int h = returnType.hashCode() ^ name.hashCode() ^ getDeclaringClass().hashCode();
+ for(int i=0;i<argTypes.length;i++) h ^= argTypes[i].hashCode();
+ return h;
+ }
+ public boolean equals(Object o_) {
+ if(o_ == this) return true;
+ if(!(o_ instanceof Method)) return false;
+ Method o = (Method) o_;
+ if(!(o.getDeclaringClass() == getDeclaringClass() && o.returnType == returnType && o.name.equals(name))) return false;
+ if(o.argTypes.length != argTypes.length) return false;
+ for(int i=0;i<argTypes.length;i++)
+ if(o.argTypes[i] != argTypes[i]) return false;
+ return true;
+ }
}
}
projects / org.ibex.classgen.git / blobdiff