Examples of BCMethod

com.techtrader.modules.tools.bytecode.BCMethod
serp.bytecode.BCMethod
A method of a class. @author Abe White

Examples of com.techtrader.modules.tools.bytecode.BCMethod

                // what now?
            }
        }


        // Obtain the exact method we're interested in.
        BCMethod bmeth = bclass.getMethod(method.getName(),
                                          method.getParameterTypes());


        if (bmeth == null)
            return null;


        // Get the Code object, which contains the local variable table.
        Code code = bmeth.getCode();
        if (code == null)
            return null;


        LocalVariableTableAttribute attr =
                (LocalVariableTableAttribute)code.getAttribute(Constants.ATTR_LOCALS);

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Examples of serp.bytecode.BCMethod

     * Proxy the given method with one that overrides it by calling into the
     * given helper.
     */
    private void proxyOverrideMethod(BCClass bc, Method meth, 
        Method helper, Class[] params) {
        BCMethod m = bc.declareMethod(meth.getName(), meth.getReturnType(),
            meth.getParameterTypes());
        m.makePublic();
        Code code = m.getCode(true);


        code.aload().setThis();
        for (int i = 1; i < params.length; i++)
            code.xload().setParam(i - 1).setType(params[i]);
        code.invokestatic().setMethod(helper);

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Examples of serp.bytecode.BCMethod

     * Proxy the given method with one that overrides it by calling into the
     * given helper.
     */
    private void proxyBeforeAfterMethod(BCClass bc, Class type, Method meth, 
        Method before, Class[] params, Method after, Class[] afterParams) {
        BCMethod m = bc.declareMethod(meth.getName(), meth.getReturnType(),
            meth.getParameterTypes());
        m.makePublic();
        Code code = m.getCode(true);


        // invoke before
        int beforeRet = -1;
        if (before != null) {
            code.aload().setThis();

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Examples of serp.bytecode.BCMethod

     * Proxy the given setter method to dirty the proxy owner.
     */
    private void proxySetter(BCClass bc, Class type, Method meth) {
        Class[] params = meth.getParameterTypes();
        Class ret = meth.getReturnType();
        BCMethod m = bc.declareMethod(meth.getName(), ret, params);
        m.makePublic();
        Code code = m.getCode(true);
        code.aload().setThis();
        code.constant().setValue(true);
        code.invokestatic().setMethod(Proxies.class, "dirty", void.class,
            new Class[] { Proxy.class, boolean.class });
        code.aload().setThis();

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Examples of serp.bytecode.BCMethod

    /**
     * Add a writeReplace implementation that serializes to a non-proxy type
     * unless detached and this is a build-time generated class.
     */
    private void addWriteReplaceMethod(BCClass bc, boolean runtime) {
        BCMethod m = bc.declareMethod("writeReplace", Object.class, null);
        m.makeProtected();
        m.getExceptions(true).addException(ObjectStreamException.class);
        Code code = m.getCode(true);
        code.aload().setThis();
        code.constant().setValue(!runtime);
        code.invokestatic().setMethod(Proxies.class, "writeReplace", 
            Object.class, new Class[] { Proxy.class, boolean.class });
        code.areturn();

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Examples of serp.bytecode.BCMethod


    /**
     * Enhance constructor to initialize fields
     */
    private void enhanceConstructor(BCClass bc) {
        BCMethod cons = bc.getDeclaredMethod("<init>", (String[]) null);
        Code code = cons.getCode(false);
        code.afterLast();
        code.previous();


        // private BitSet loaded = new BitSet();
        BCField loaded = addBeanField(bc, "loaded", BitSet.class);

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Examples of serp.bytecode.BCMethod

    private void addGetType(BCClass bc, ClassMetaData meta) {
        BCField type = bc.declareField("type", Class.class);
        type.setStatic(true);
        type.makePrivate();
        // public Class getType() {
        BCMethod getter = bc.declareMethod("getType", Class.class, null);
        getter.makePublic();
        Code code = getter.getCode(true);
        // if (type == null) {
        //     try {
        //       type = Class.forName
        //         (meta.getDescribedType().getName(), true,
        //         Thread.currentThread().getContextClassLoader());

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Examples of serp.bytecode.BCMethod

    /**
     * Add methods for loading and storing class-level impl data.
     */
    private void addImplDataMethods(BCClass bc, ClassMetaData meta) {
        // void storeImplData(OpenJPAStateManager);
        BCMethod meth = bc.declareMethod("storeImplData", void.class,
            new Class[]{ OpenJPAStateManager.class });
        Code code = meth.getCode(true);


        BCField impl = null;
        if (!usesImplData(meta))
            code.vreturn();
        else {
            // if (sm.isImplDataCacheable())
            //     setImplData(sm.getImplData());
            impl = addBeanField(bc, "implData", Object.class);
            code.aload().setParam(0);
            code.invokeinterface().setMethod(OpenJPAStateManager.class,
                "isImplDataCacheable", boolean.class, null);
            JumpInstruction ifins = code.ifeq();
            code.aload().setThis();
            code.aload().setParam(0);
            code.invokeinterface().setMethod(OpenJPAStateManager.class,
                "getImplData", Object.class, null);
            code.invokevirtual().setMethod("setImplData", void.class,
                new Class[]{ Object.class });
            ifins.setTarget(code.vreturn());
        }
        code.calculateMaxStack();
        code.calculateMaxLocals();


        // void loadImplData(OpenJPAStateManager);
        meth = bc.declareMethod("loadImplData", void.class,
            new Class[]{ OpenJPAStateManager.class });
        code = meth.getCode(true);
        if (!usesImplData(meta))
            code.vreturn();
        else {
            // if (sm.getImplData() == null && implData != null)
            //     sm.setImplData(impl, true);

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Examples of serp.bytecode.BCMethod

    /**
     * Add methods for loading and storing class-level impl data.
     */
    private void addFieldImplDataMethods(BCClass bc, ClassMetaData meta) {
        // public void loadImplData(OpenJPAStateManager sm, int i)
        BCMethod meth = bc.declareMethod("loadImplData", void.class,
            new Class[]{ OpenJPAStateManager.class, int.class });
        meth.makePrivate();
        Code code = meth.getCode(true);


        int count = countImplDataFields(meta);
        BCField impl = null;
        if (count == 0)
            code.vreturn();
        else {
            // Object[] fieldImpl
            impl = bc.declareField("fieldImpl", Object[].class);
            impl.makePrivate();


            // if (fieldImpl != null)
            code.aload().setThis();
            code.getfield().setField(impl);
            JumpInstruction ifins = code.ifnonnull();
            code.vreturn();


            // Object obj = null;
            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)

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Examples of serp.bytecode.BCMethod

     * Add methods for loading and storing version data.
     */
    protected void addVersionMethods(BCClass bc) {
        // void storeVersion(OpenJPAStateManager sm);
        addBeanField(bc, "version", Object.class);
        BCMethod meth = bc.declareMethod("storeVersion", void.class,
            new Class[]{ OpenJPAStateManager.class });
        Code code = meth.getCode(true);


        // version = sm.getVersion();
        code.aload().setThis();
        code.aload().setParam(0);
        code.invokeinterface()
            .setMethod(OpenJPAStateManager.class, "getVersion",
                Object.class, null);
        code.putfield().setField("version", Object.class);
        code.vreturn();
        code.calculateMaxStack();
        code.calculateMaxLocals();


        // void loadVersion(OpenJPAStateManager sm)
        meth = bc.declareMethod("loadVersion", void.class,
            new Class[]{ OpenJPAStateManager.class });
        code = meth.getCode(true);


        // if (sm.getVersion() == null)
        //     sm.setVersion(version);
        code.aload().setParam(0);
        code.invokeinterface().setMethod(OpenJPAStateManager.class,

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