Package serp.bytecode

Examples of serp.bytecode.Instruction

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        code.invokevirtual().setMethod(Thread.class, "getContextClassLoader",
            ClassLoader.class, null);
        code.invokestatic().setMethod(Class.class, "forName", Class.class,
            new Class[]{ String.class, boolean.class, ClassLoader.class });
        code.putstatic().setField(type);
        Instruction go2 = code.go2();
        jumps.add(go2);
        handler.setTryEnd(go2);
        handler.setCatch(ClassNotFoundException.class);
        handler.setHandlerStart(throwException
            (code, InternalException.class));
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            code.getfield().setField(impl);
            code.constant().setValue(true);
            code.invokeinterface().setMethod(OpenJPAStateManager.class,
                "setImplData", void.class,
                new Class[]{ Object.class, boolean.class });
            Instruction ins = code.vreturn();
            ifins.setTarget(ins);
            ifins2.setTarget(ins);
        }
        code.calculateMaxStack();
        code.calculateMaxLocals();
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            int obj = code.getNextLocalsIndex();
            ifins.setTarget(code.constant().setNull());
            code.astore().setLocal(obj);

            // establish switch target, then move before it
            Instruction target = code.aload().setLocal(obj);
            code.previous();

            // switch(i)
            code.iload().setParam(1);
            LookupSwitchInstruction lswitch = code.lookupswitch();
            FieldMetaData[] fields = meta.getFields();
            int cacheable = 0;
            for (int i = 0; i < fields.length; i++) {
                if (!usesImplData(fields[i]))
                    continue;
                // case x: obj = fieldImpl[y]; break;
                lswitch.addCase(i, code.aload().setThis());
                code.getfield().setField(impl);
                code.constant().setValue(cacheable++);
                code.aaload();
                code.astore().setLocal(obj);
                code.go2().setTarget(target);
            }
            lswitch.setDefaultTarget(target);

            // if (obj != null)
            code.next();    // jump back over target
            ifins = code.ifnonnull();
            code.vreturn();

            // sm.setImplData(index, impl);
            ifins.setTarget(code.aload().setParam(0));
            code.iload().setParam(1);
            code.aload().setLocal(obj);
            code.invokeinterface().setMethod(OpenJPAStateManager.class,
                "setImplData", void.class,
                new Class[]{ int.class, Object.class });
            code.vreturn();
        }
        code.calculateMaxLocals();
        code.calculateMaxStack();

        // void storeImplData(OpenJPAStateManager sm, int index, boolean loaded)
        meth = bc.declareMethod("storeImplData", void.class,
            new Class[]{ OpenJPAStateManager.class, int.class, boolean.class });
        code = meth.getCode(true);
        if (count == 0)
            code.vreturn();
        else {
            // int arrIdx = -1;
            // switch(index)
            int arrIdx = code.getNextLocalsIndex();
            code.constant().setValue(-1);
            code.istore().setLocal(arrIdx);
            code.iload().setParam(1);
            LookupSwitchInstruction lswitch = code.lookupswitch();

            // establish switch target, then move before it
            Instruction switchTarget = code.iload().setLocal(arrIdx);
            code.previous();

            FieldMetaData[] fields = meta.getFields();
            int cacheable = 0;
            for (int i = 0; i < fields.length; i++) {
                if (!usesImplData(fields[i]))
                    continue;
                // case x: arrIdx = y; break;
                lswitch.addCase(i, code.constant().setValue(cacheable++));
                code.istore().setLocal(arrIdx);
                code.go2().setTarget(switchTarget);
            }
            lswitch.setDefaultTarget(switchTarget);
            code.next();    // step over switch target

            // if (arrIdx != -1)
            code.constant().setValue(-1);
            JumpInstruction ifins = code.ificmpne();
            code.vreturn();

            // create null target, then move before it
            Instruction nullTarget = code.aload().setThis();
            code.previous();

            // if (loaded)
            ifins.setTarget(code.iload().setParam(2));
            code.ifeq().setTarget(nullTarget);
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     */
    private Instruction addLoad(BCClass bc, Code code, FieldMetaData fmd,
        int objectCount, int local, boolean fields) {
        int index = fmd.getIndex();
        int typeCode = replaceType(fmd);
        Instruction first;
        if (typeCode < JavaTypes.OBJECT) {
            // sm.store<type>(i, field<i>)
            Class type = forType(fmd.getTypeCode());
            first = code.aload().setParam(0);
            code.constant().setValue(index);
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     */
    private Instruction addLoadIntermediate(Code code, int index,
        int objectCount, Collection jumps2, int inter) {
        // {
        //     Object inter = objects[objectCount];
        Instruction first = code.aload().setThis();
        code.getfield().setField("objects", Object[].class);
        code.constant().setValue(objectCount);
        code.aaload();
        code.astore().setLocal(inter);
        //     if (inter != null && !sm.getLoaded().get(index))
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        if (code == null)
            return null;
        code.beforeFirst();

        BCField field = null, cur;
        Instruction templateIns, prevIns, earlierIns;
        int backupCount = 3;
        while (code.searchForward(template)) {
            templateIns = code.previous();
            if (!code.hasPrevious())
                return null;
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     */
    private void replaceAndValidateFieldAccess() throws NoSuchMethodException {
        // create template putfield/getfield instructions to search for
        Code template = (Code) AccessController.doPrivileged(
            J2DoPrivHelper.newCodeAction());
        Instruction put = template.putfield();
        Instruction get = template.getfield();
        Instruction stat = template.invokestatic();

        // look through all methods; this is done before any methods are added
        // so we don't need to worry about excluding synthetic methods.
        BCMethod[] methods = _managedType.getDeclaredMethods();
        Code code;
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        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();
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            code.aload().setLocal(oid);
        JumpInstruction go2 = code.go2();

        // if (val == null)
        //   val = <default>;
        Instruction def;
        switch (pkcode) {
            case JavaTypes.BOOLEAN:
                def = code.constant().setValue(false);
                break;
            case JavaTypes.BYTE:
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    /**
     * Helper method to add the code necessary to throw the given
     * exception type, sans message.
     */
    private Instruction throwException(Code code, Class type) {
        Instruction ins = code.anew().setType(type);
        code.dup();
        code.invokespecial().setMethod(type, "<init>", void.class, null);
        code.athrow();
        return ins;
    }
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Related Classes of serp.bytecode.Instruction

  • org.apache.openjpa.datacache.DataCachePCDataGenerator
  • org.apache.openjpa.enhance.DynamicStorageGenerator
  • org.apache.openjpa.enhance.PCDataGenerator
  • org.apache.openjpa.enhance.PCEnhancer
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