final CPGen cp;
private final AttrGen attributes;
- /** @see #ClassGen(Type.Object,Type.Object,int) */
+ /** @see #ClassGen(Type.Object, Type.Object, int) */
public ClassGen(String name, String superName, int flags) {
- this(new Type.Object(name),new Type.Object(superName),flags);
+ this(Type.fromDescriptor(name).asObject(), Type.fromDescriptor(superName).asObject(), flags);
}
- /** @see #ClassGen(Type.Object,Type.Object,int,Type.Object[]) */
- public ClassGen(Type.Object thisType,Type.Object superType, int flags) {
- this(thisType,superType,flags,null);
+ /** @see #ClassGen(Type.Object, Type.Object, int, Type.Object[]) */
+ public ClassGen(Type.Object thisType, Type.Object superType, int flags) {
+ this(thisType, superType, flags, null);
}
/** Creates a new ClassGen object
@param superType The superclass of the generated class (commonly Type.OBJECT)
@param flags The access flags for this class (ACC_PUBLIC, ACC_FINAL, ACC_SUPER, ACC_INTERFACE, and ACC_ABSTRACT)
*/
- public ClassGen(Type.Object thisType,Type.Object superType, int flags, Type.Object[] interfaces) {
+ public ClassGen(Type.Object thisType, Type.Object superType, int flags, Type.Object[] interfaces) {
if((flags & ~(ACC_PUBLIC|ACC_FINAL|ACC_SUPER|ACC_INTERFACE|ACC_ABSTRACT)) != 0)
throw new IllegalArgumentException("invalid flags");
this.thisType = thisType;
@see CGConst
*/
public final MethodGen addMethod(String name, Type ret, Type[] args, int flags) {
- MethodGen mg = new MethodGen(this,name,ret,args,flags);
+ MethodGen mg = new MethodGen(this, name, ret, args, flags);
methods.addElement(mg);
return mg;
}
@see CGConst
*/
public final FieldGen addField(String name, Type type, int flags) {
- FieldGen fg = new FieldGen(this,name,type,flags);
+ FieldGen fg = new FieldGen(this, name, type, flags);
fields.addElement(fg);
return fg;
}
String[] a = thisType.components();
int i;
for(i=0;i<a.length-1;i++) {
- f = new File(f,a[i]);
+ f = new File(f, a[i]);
f.mkdir();
}
- f = new File(f,a[i] + ".class");
+ f = new File(f, a[i] + ".class");
}
- dump(new FileOutputStream(f));
+ OutputStream os = new FileOutputStream(f);
+ dump(os);
+ os.close();
}
/** Writes the classfile data to the outputstream specified
cp.add(thisType);
cp.add(superType);
if(interfaces != null) for(int i=0;i<interfaces.length;i++) cp.add(interfaces[i]);
- if(sourceFile != null && !attributes.contains("SourceFile")) attributes.add("SourceFile",cp.addUtf8(sourceFile));
+ if(sourceFile != null && !attributes.contains("SourceFile")) attributes.add("SourceFile", cp.addUtf8(sourceFile));
for(int i=0;i<methods.size();i++) ((MethodGen)methods.elementAt(i)).finish();
for(int i=0;i<fields.size();i++) ((FieldGen)fields.elementAt(i)).finish();
o.writeShort(3); // minor_version
o.writeShort(45); // major_version
- o.writeShort(cp.slots()); // constant_pool_count
cp.dump(o); // constant_pool
o.writeShort(flags);
attributes.dump(o); // attributes
}
+ public ClassGen read(File f) throws ClassReadExn, IOException {
+ InputStream is = new FileInputStream(f);
+ ClassGen ret = read(is);
+ is.close();
+ return ret;
+ }
+
+ public ClassGen read(InputStream is) throws ClassReadExn, IOException {
+ return new ClassGen(new DataInputStream(new BufferedInputStream(is)));
+ }
+
+ ClassGen(DataInput i) throws ClassReadExn, IOException {
+ if(i.readInt() != 0xcadebabe) throw new ClassReadExn("invalid magic");
+ short minor = (short)i.readInt();
+ if(minor != 3) throw new ClassReadExn("invalid minor version: " + minor);
+ if(i.readInt() != 45) throw new ClassReadExn("invalid major version");
+ cp = new CPGen(i);
+ flags = (short)i.readShort();
+ thisType = cp.getType(i.readShort());
+ superType = cp.getType(i.readShort());
+ interfaces = new Type.Object[i.readShort()];
+ for(int j=0; j<interfaces.length; j++) interfaces[j] = cp.getType(i.readShort());
+ int numFields = i.readShort();
+ for(int j=0; j<numFields; j++) fields.add(new FieldGen(i));
+ int numMethods = i.readShort();
+ for(int j=0; j<numMethods; j++) methods.add(new MethodGen(i));
+ attributes = new AttrGen(cp, i);
+ }
+
/** Thrown when class generation fails for a reason not under the control of the user
(IllegalStateExceptions are thrown in those cases */
public static class Exn extends RuntimeException {
public Exn(String s) { super(s); }
}
+ public static class ClassReadExn extends IOException {
+ public ClassReadExn(String s) { super(s); }
+ }
+
/** A class representing a field or method reference. This is used as an argument to the INVOKE*, GET*, and PUT* bytecodes
@see MethodRef
@see FieldRef
private final CPGen cp;
private final Hashtable ht = new Hashtable();
- public AttrGen(CPGen cp) {
- this.cp = cp;
+ public AttrGen(CPGen cp) { this.cp = cp; }
+ public AttrGen(CPGen cp, DataInput in) throws IOException {
+ this(cp);
+ while(true) {
+ String name = null;
+ try {
+ name = ((CPGen.Utf8Ent)cp.getByIndex(in.readShort())).s;
+ } catch (EOFException _) {
+ return;
+ }
+ int length = in.readInt();
+ if (length==2) { // FIXME might be wrong assumption
+ ht.put(name, cp.getByIndex(in.readShort()));
+ } else {
+ byte[] buf = new byte[length];
+ in.readFully(buf);
+ ht.put(name, buf);
+ }
+ }
}
public void add(String s, Object data) {
cp.addUtf8(s);
- ht.put(s,data);
+ ht.put(s, data);
}
public boolean contains(String s) { return ht.get(s) != null; }
/*public static void main(String[] args) throws Exception {
Type.Object me = new Type.Object("Test");
- ClassGen cg = new ClassGen("Test","java.lang.Object",ACC_PUBLIC|ACC_SUPER|ACC_FINAL);
- FieldGen fg = cg.addField("foo",Type.INT,ACC_PUBLIC|ACC_STATIC);
+ ClassGen cg = new ClassGen("Test", "java.lang.Object", ACC_PUBLIC|ACC_SUPER|ACC_FINAL);
+ FieldGen fg = cg.addField("foo", Type.INT, ACC_PUBLIC|ACC_STATIC);
- MethodGen mg = cg.addMethod("main",Type.VOID,new Type[]{Type.arrayType(Type.STRING)},ACC_STATIC|ACC_PUBLIC);
+ MethodGen mg = cg.addMethod("main", Type.VOID, new Type[]{Type.arrayType(Type.STRING)}, ACC_STATIC|ACC_PUBLIC);
mg.setMaxLocals(1);
mg.addPushConst(0);
//mg.add(ISTORE_0);
- mg.add(PUTSTATIC, fieldRef(me,"foo",Type.INT));
+ mg.add(PUTSTATIC, fieldRef(me, "foo", Type.INT));
int top = mg.size();
- mg.add(GETSTATIC,cg.fieldRef(new Type.Object("java.lang.System"),"out",new Type.Object("java.io.PrintStream")));
+ mg.add(GETSTATIC, cg.fieldRef(new Type.Object("java.lang.System"), "out", new Type.Object("java.io.PrintStream")));
//mg.add(ILOAD_0);
- mg.add(GETSTATIC,cg.fieldRef(me,"foo",Type.INT));
- mg.add(INVOKEVIRTUAL,cg.methodRef(new Type.Object("java.io.PrintStream"),"println",Type.VOID, new Type[]{Type.INT}));
- //mg.add(IINC,new int[]{0,1});
+ mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
+ mg.add(INVOKEVIRTUAL, cg.methodRef(new Type.Object("java.io.PrintStream"), "println", Type.VOID, new Type[]{Type.INT}));
+ //mg.add(IINC, new int[]{0, 1});
//mg.add(ILOAD_0);
- mg.add(GETSTATIC,cg.fieldRef(me,"foo",Type.INT));
+ mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
mg.addPushConst(1);
mg.add(IADD);
mg.add(DUP);
- mg.add(PUTSTATIC,cg.fieldRef(me,"foo",Type.INT));
+ mg.add(PUTSTATIC, cg.fieldRef(me, "foo", Type.INT));
mg.addPushConst(10);
- mg.add(IF_ICMPLT,top);
+ mg.add(IF_ICMPLT, top);
mg.add(RETURN);
cg.dump("Test.class");
}*/
projects / org.ibex.classgen.git / blobdiff