Examples of serp.bytecode.JumpInstruction

serp.bytecode.JumpInstruction
An instruction that specifies a position in the code block to jump to. Examples include go2, jsr, etc. @author Abe White

        int firstParamOffset = getAccessorParameterOffset(fmd);


        // if (inst.pcStateManager == null) inst.<field> = value;
        loadManagedInstance(code, true, fmd);
        code.getfield().setField(SM, SMTYPE);
        JumpInstruction ifins = code.ifnonnull();
        loadManagedInstance(code, true, fmd);
        code.xload().setParam(firstParamOffset);
        addSetManagedValueCode(code, fmd);
        if(fmd.isVersion()==true && _addVersionInitFlag){
            // if we are setting the version, flip the versionInit flag to true
            loadManagedInstance(code, true);
            code.constant().setValue(1);
            // pcVersionInit = true;
            putfield(code, null, VERSION_INIT_STR, boolean.class);   
        }
        code.vreturn();


        // inst.pcStateManager.setting<fieldType>Field (inst,
        //     pcInheritedFieldCount + <index>, inst.<field>, value, 0);
        ifins.setTarget(loadManagedInstance(code, true, fmd));
        code.getfield().setField(SM, SMTYPE);
        loadManagedInstance(code, true, fmd);
        code.getstatic().setField(INHERIT, int.class);
        code.constant().setValue(index);
        code.iadd();

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        loadManagedInstance(code, false);
        code.aload().setParam(0);
        code.invokevirtual().setMethod(getType(_meta),
            PRE + "WriteUnmanaged", void.class, outargs);


        JumpInstruction go2 = null;
        if (detachedState) {
            // if (sm != null)
            //   if (sm.writeDetached (out))
            //      return;
            loadManagedInstance(code, false);
            code.getfield().setField(SM, SMTYPE);
            IfInstruction ifnull = code.ifnull();
            loadManagedInstance(code, false);
            code.getfield().setField(SM, SMTYPE);
            code.aload().setParam(0);
            code.invokeinterface().setMethod(SMTYPE, "writeDetached",
                boolean.class, outargs);
            go2 = code.ifeq();
            code.vreturn();


            // else
            //   out.writeObject (pcGetDetachedState ());
            Class[] objargs = new Class[]{ Object.class };
            ifnull.setTarget(code.aload().setParam(0));
            loadManagedInstance(code, false);
            code.invokevirtual().setMethod(PRE + "GetDetachedState",
                Object.class, null);
            code.invokeinterface().setMethod(ObjectOutput.class,
                "writeObject", void.class, objargs);
            //    out.writeObject (null) // StateManager
            code.aload().setParam(0);
            code.constant().setValue((Object) null);
            code.invokeinterface().setMethod(ObjectOutput.class,
                "writeObject", void.class, objargs);
        }
        if (go2 != null)
            go2.setTarget(code.nop());


        // write managed fields
        FieldMetaData[] fmds = _meta.getFields();
        for (int i = 0; i < fmds.length; i++)
            if (!fmds[i].isTransient())

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        code.aload().setParam(0);
        code.putfield().setField(elementType);


        // create change tracker and set it
        code.iload().setParam(2);
        JumpInstruction ifins = code.ifeq();
        code.aload().setLocal(ret);
        code.anew().setType(CollectionChangeTrackerImpl.class);
        code.dup();
        code.aload().setLocal(ret);
        code.constant().setValue(allowsDuplicates(type));
        code.constant().setValue(isOrdered(type));
        code.aload().setParam(3);
        code.invokespecial().setMethod(CollectionChangeTrackerImpl.class, 
            "<init>", void.class, new Class[] { Collection.class, 
            boolean.class, boolean.class, boolean.class });
        code.putfield().setField(changeTracker);


        ifins.setTarget(code.aload().setLocal(ret));
        code.areturn();
        code.calculateMaxStack();
        code.calculateMaxLocals();
    }

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        code.aload().setParam(1);
        code.putfield().setField(valueType);


        // create change tracker and set it
        code.iload().setParam(3);
        JumpInstruction ifins = code.ifeq();
        code.aload().setLocal(ret);
        code.anew().setType(MapChangeTrackerImpl.class);
        code.dup();
        code.aload().setLocal(ret);
        code.aload().setParam(4);
        code.invokespecial().setMethod(MapChangeTrackerImpl.class, 
            "<init>", void.class, new Class[] { Map.class, boolean.class });
        code.putfield().setField(changeTracker);


        ifins.setTarget(code.aload().setLocal(ret));
        code.areturn();
        code.calculateMaxStack();
        code.calculateMaxLocals();
    }

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        code.astore().setLocal(inst);


        // if (clear)
        //   pc.pcClearFields ();
        code.iload().setParam((oid) ? 2 : 1);
        JumpInstruction noclear = code.ifeq();
        code.aload().setLocal(inst);
        code.invokevirtual().setMethod(PRE + "ClearFields", void.class, null);


        // pc.pcStateManager = sm;
        noclear.setTarget(code.aload().setLocal(inst));
        code.aload().setParam(0);
        code.putfield().setField(SM, SMTYPE);


        // copy key fields from oid
        if (oid) {

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        code.istore().setLocal(relLocal);
        code.iload().setLocal(relLocal);


        // super: if (rel < 0) super.pcReplaceField (fieldNumber); return;
        // no super: if (rel < 0) throw new IllegalArgumentException ();
        JumpInstruction ifins = code.ifge();
        if (_meta.getPCSuperclass() != null) {
            loadManagedInstance(code, false);
            String[] args;
            if (copy) {
                args = new String[]{ getType(_meta.getPCSuperclassMetaData()).
                    getName(), int.class.getName() };
                code.aload().setParam(0);
            } else
                args = new String[]{ int.class.getName() };
            code.iload().setParam(fieldNumber);
            code.invokespecial().setMethod(getType(_meta.
                getPCSuperclassMetaData()).getName(), name, 
                void.class.getName(), args);
            code.vreturn();
        } else
            throwException(code, IllegalArgumentException.class);


        ifins.setTarget(code.nop());
        return relLocal;
    }

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            // if (other.pcStateManager != pcStateManager)
            //  throw new IllegalArgumentException


            loadManagedInstance(code, false);
            code.getfield().setField(SM, SMTYPE);
            JumpInstruction ifins = code.ifacmpeq();
            throwException(code, IllegalArgumentException.class);
            ifins.setTarget(code.nop());


            // if (pcStateManager == null)
            //  throw new IllegalStateException
            loadManagedInstance(code, false);
            code.getfield().setField(SM, SMTYPE);
            ifins = code.ifnonnull();
            throwException(code, IllegalStateException.class);
            ifins.setTarget(code.nop());
        }


        // for (int i = 0;
        code.constant().setValue(0);
        int idx = code.getNextLocalsIndex();
        code.istore().setLocal(idx);
        JumpInstruction testins = code.go2();


        // <method> (fields[i]);
        Instruction bodyins = loadManagedInstance(code, false);
        if (copy)
            code.aload().setLocal(inst);
        code.aload().setParam(fieldNumbers);
        code.iload().setLocal(idx);
        code.iaload();
        code.invokevirtual().setMethod(single);


        // i++;
        code.iinc().setIncrement(1).setLocal(idx);


        // i < fields.length
        testins.setTarget(code.iload().setLocal(idx));
        code.aload().setParam(fieldNumbers);
        code.arraylength();
        code.ificmplt().setTarget(bodyins);
        code.vreturn();

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        Code code = method.getCode(true);


        // if (pcStateManager == null) return <default>;
        loadManagedInstance(code, false);
        code.getfield().setField(SM, SMTYPE);
        JumpInstruction ifins = code.ifnonnull();
        if (returnType.equals(boolean.class))
            code.constant().setValue(false);
        else if (!returnType.equals(void.class))
            code.constant().setNull();
        code.xreturn().setType(returnType);


        // if this is the dirty-check method and we're subclassing but not
        // redefining, hook into PCHelper to do the dirty check
        if (isDirtyCheckMethod && !getRedefine()) {
            // RedefinitionHelper.dirtyCheck(sm);
            ifins.setTarget(loadManagedInstance(code, false));
            code.getfield().setField(SM, SMTYPE);
            code.dup(); // for the return statement below
            code.invokestatic().setMethod(RedefinitionHelper.class, 
                "dirtyCheck", void.class, new Class[] { SMTYPE });
        } else {
            ifins.setTarget(loadManagedInstance(code, false));
            code.getfield().setField(SM, SMTYPE);
        }
        
        // return pcStateManager.<method> (<args>);
        // managed instance loaded above in if-else block

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        Code code = method.getCode(true);


        // if (pcStateManager == null)
        loadManagedInstance(code, false);
        code.getfield().setField(SM, SMTYPE);
        JumpInstruction ifins = code.ifnonnull();
        FieldMetaData versionField = _meta.getVersionField();


        if (versionField == null)
            code.constant().setNull(); // return null;
        else {
            // return <versionField>;
            Class wrapper = toPrimitiveWrapper(versionField);
            if (wrapper != versionField.getDeclaredType()) {
                code.anew().setType(wrapper);
                code.dup();
            }
            loadManagedInstance(code, false);
            addGetManagedValueCode(code, versionField);
            if (wrapper != versionField.getDeclaredType())
                code.invokespecial().setMethod(wrapper, "<init>", void.class,
                    new Class[]{ versionField.getDeclaredType() });
        }
        code.areturn();


        // return pcStateManager.getVersion ();
        ifins.setTarget(loadManagedInstance(code, false));
        code.getfield().setField(SM, SMTYPE);
        code.invokeinterface().setMethod(SMTYPE, "getVersion", Object.class,
            null);
        code.areturn();

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        // if (pcStateManager != null)
        //  pcStateManager = pcStateManager.replaceStateManager(sm);
        loadManagedInstance(code, false);
        code.getfield().setField(SM, SMTYPE);
        JumpInstruction ifins = code.ifnull();
        loadManagedInstance(code, false);
        loadManagedInstance(code, false);
        code.getfield().setField(SM, SMTYPE);
        code.aload().setParam(0);
        code.invokeinterface().setMethod(SMTYPE, "replaceStateManager",
            SMTYPE, new Class[]{ SMTYPE });
        code.putfield().setField(SM, SMTYPE);
        code.vreturn();


        // SecurityManager sec = System.getSecurityManager ();
        // if (sec != null)
        //    sec.checkPermission (Permission.SET_STATE_MANAGER);
        ifins.setTarget(code.invokestatic().setMethod(System.class,
            "getSecurityManager", SecurityManager.class, null));


        // pcStateManager = sm;
        ifins.setTarget(loadManagedInstance(code, false));
        code.aload().setParam(0);
        code.putfield().setField(SM, SMTYPE);
        code.vreturn();


        code.calculateMaxStack();

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