Examples of org.mvel2.asm.MethodVisitor

org.mvel2.asm.MethodVisitor
A visitor to visit a Java method. The methods of this class must be called in the following order: ( visitParameter )* [ visitAnnotationDefault ] ( visitAnnotation | visitTypeAnnotation | visitAttribute )* [ visitCode ( visitFrame | visitXInsn | visitLabel | visitInsnAnnotation | visitTryCatchBlock | visitTryCatchBlockAnnotation | visitLocalVariable | visitLocalVariableAnnotation | visitLineNumber )* visitMaxs ] visitEnd. In addition, the visitXInsn and visitLabel methods must be called in the sequential order of the bytecode instructions of the visited code, visitInsnAnnotation must be called after the annotated instruction, visitTryCatchBlock must be called before the labels passed as arguments have been visited, visitTryCatchBlockAnnotation must be called after the corresponding try catch block has been visited, and the visitLocalVariable, visitLocalVariableAnnotation and visitLineNumber methods must be called after the labels passed as arguments have been visited. @author Eric Bruneton

    }




    protected void buildKeyset( ClassVisitor cw, String wrapperName, String coreName, ClassDefinition trait, ClassDefinition core, BitSet mask ) {


        MethodVisitor mv = cw.visitMethod( ACC_PUBLIC, 
                                           "keySet", 
                                           "()" + Type.getDescriptor( Set.class ), 
                                           "()Ljava/util/Set<Ljava/lang/String;>;", 
                                           null);
        mv.visitCode();
        mv.visitTypeInsn( NEW, Type.getInternalName( HashSet.class ) );
        mv.visitInsn( DUP );
        mv.visitMethodInsn( INVOKESPECIAL,
                            Type.getInternalName( HashSet.class ),
                            "<init>", 
                             "()V" );
        mv.visitVarInsn( ASTORE, 1 );


        for ( FieldDefinition field : core.getFieldsDefinitions() ) {
            mv.visitVarInsn( ALOAD, 1 );
            mv.visitLdcInsn( field.getName() );
            mv.visitMethodInsn( INVOKEINTERFACE, 
                                Type.getInternalName( Set.class ), 
                                "add", 
                                "(" + Type.getDescriptor( Object.class ) + ")Z" );
            mv.visitInsn( POP );
        }


        mv.visitVarInsn( ALOAD, 1 );
        mv.visitVarInsn( ALOAD, 0 );
        mv.visitMethodInsn( INVOKESPECIAL, 
                            Type.getInternalName( TripleBasedStruct.class ), 
                            "keySet", 
                            "()" + Type.getDescriptor( Set.class ));
        mv.visitMethodInsn( INVOKEINTERFACE,
                            Type.getInternalName( Set.class ),
                            "addAll", 
                            "(" + Type.getDescriptor( Collection.class ) + ")Z" );
        mv.visitInsn( POP );


        mv.visitVarInsn( ALOAD, 1 );
        mv.visitInsn( ARETURN );
//        mv.visitMaxs( 2, 2 );
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();
    }

View Full Code Here






    protected void buildValues( ClassVisitor cw, String wrapperName, String coreName, ClassDefinition trait, ClassDefinition core, BitSet mask ) {


        MethodVisitor mv = cw.visitMethod( ACC_PUBLIC, 
                                           "values", 
                                           "()" + Type.getDescriptor( Collection.class ), 
                                           "()Ljava/util/Collection<Ljava/lang/Object;>;", 
                                           null );
        mv.visitCode();


        mv.visitTypeInsn( NEW, Type.getInternalName( ArrayList.class ) );
        mv.visitInsn( DUP );
        mv.visitMethodInsn( INVOKESPECIAL, Type.getInternalName( ArrayList.class ), "<init>", "()V" );
        mv.visitVarInsn( ASTORE, 1 );




        for ( FieldDefinition field : core.getFieldsDefinitions() ) {
            mv.visitVarInsn( ALOAD, 1 );


            TraitFactory.invokeExtractor( mv, wrapperName, trait, core, field );


            if ( BuildUtils.isPrimitive( field.getTypeName() ) ) {
                TraitFactory.valueOf( mv, field.getTypeName() );
            }


            mv.visitMethodInsn( INVOKEINTERFACE,
                                Type.getInternalName( Collection.class ),
                                "add", 
                                "(" + Type.getDescriptor( Object.class ) + ")Z" );
            mv.visitInsn( POP );
        }


        mv.visitVarInsn( ALOAD, 1 );
        mv.visitVarInsn( ALOAD, 0 );
        mv.visitMethodInsn( INVOKESPECIAL, 
                            Type.getInternalName( TripleBasedStruct.class ), 
                            "values", 
                            "()" + Type.getDescriptor( Collection.class ) );
        mv.visitMethodInsn( INVOKEINTERFACE, 
                            Type.getInternalName( Collection.class ),
                            "addAll", 
                            "(" + Type.getDescriptor( Collection.class ) + ")Z" );
        mv.visitInsn( POP );


        mv.visitVarInsn( ALOAD, 1 );
        mv.visitInsn( ARETURN );


//        mv.visitMaxs( core.getFieldsDefinitions().size() > 0 ? 3 : 2, 2 );
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();
    }

View Full Code Here








    public void buildCommonMethods( ClassVisitor cw, String wrapper ) {
        MethodVisitor mv;


        {
            mv = cw.visitMethod( ACC_PUBLIC, "toString", "()" + Type.getDescriptor( String.class ), null, null );
            mv.visitCode();
            mv.visitTypeInsn( NEW, Type.getInternalName( StringBuilder.class ) );
            mv.visitInsn( DUP );
            mv.visitMethodInsn( INVOKESPECIAL, Type.getInternalName( StringBuilder.class ), "<init>", "()V" );
            mv.visitLdcInsn("[[");
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( StringBuilder.class ), "append",
                                "(" + Type.getDescriptor( String.class ) +")" + Type.getDescriptor( StringBuilder.class ) );
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitMethodInsn( INVOKEVIRTUAL, BuildUtils.getInternalType( wrapper ), "entrySet", "()" + Type.getDescriptor( Set.class ) );
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( StringBuilder.class ), "append",
                                "(" + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( StringBuilder.class ) );
            mv.visitLdcInsn( "]]" );
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( StringBuilder.class ), "append",
                                "(" + Type.getDescriptor( String.class ) +")" + Type.getDescriptor( StringBuilder.class ));
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( StringBuilder.class ), "toString", "()" + Type.getDescriptor( String.class ) );
            mv.visitInsn( ARETURN );
//            mv.visitMaxs( 2, 1 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();
        }
        {
            mv = cw.visitMethod( ACC_PUBLIC + ACC_BRIDGE + ACC_SYNTHETIC, "put", 
                                "(" + Type.getDescriptor( Object.class ) + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Object.class ), 
                                null, null);
            mv.visitCode();
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitVarInsn( ALOAD, 1 );
            mv.visitTypeInsn( CHECKCAST, Type.getInternalName( String.class ) );
            mv.visitVarInsn( ALOAD, 2 );
            mv.visitMethodInsn( INVOKEVIRTUAL, BuildUtils.getInternalType( wrapper ), "put", 
                                "(" + Type.getDescriptor( String.class ) + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Object.class ) );
            mv.visitInsn( ARETURN);
//            mv.visitMaxs( 3, 3 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();
        }




    }

View Full Code Here

            NoSuchFieldException {




        ClassWriter cw = new ClassWriter( ClassWriter.COMPUTE_MAXS );
        FieldVisitor fv;
        MethodVisitor mv;


        // get the method bitmask
        BitSet mask = traitRegistry.getFieldMask(trait.getName(), core.getDefinedClass().getName());


        String name = TraitFactory.getPropertyWrapperName( trait, core );
        String masterName = TraitFactory.getProxyName(trait, core);




        String internalWrapper  = BuildUtils.getInternalType(name);
        String descrCore        = Type.getDescriptor( core.getDefinedClass() );
        String internalCore     = Type.getInternalName( core.getDefinedClass() );




        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER,
                internalWrapper,
                null,
                Type.getInternalName( TripleBasedStruct.class ),
                new String[] { Type.getInternalName( Serializable.class ) } );


        cw.visitInnerClass( Type.getInternalName( Map.Entry.class ),
                            Type.getInternalName( Map.class ), 
                            "Entry", 
                            ACC_PUBLIC + ACC_STATIC + ACC_ABSTRACT + ACC_INTERFACE );






        {
            fv = cw.visitField(0, "object", descrCore, null, null);
            fv.visitEnd();
        }




        {
            mv = cw.visitMethod(ACC_PUBLIC,
                    "<init>",
                    "()V",
                    null,
                    null);


            mv.visitCode();
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitMethodInsn( INVOKESPECIAL, 
                                Type.getInternalName( TripleBasedStruct.class ),
                                "<init>", 
                                "()V" );
//            mv.visitVarInsn(ALOAD, 0);
//            mv.visitMethodInsn(INVOKESPECIAL, internalWrapper, "initSoftFields", "()V");
            mv.visitInsn( RETURN );
//            mv.visitMaxs( 1, 1 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();




        }




        {
            mv = cw.visitMethod(ACC_PUBLIC,
                    "<init>",
                    "(" + 
                            descrCore + 
                            Type.getDescriptor( TripleStore.class ) +
                            Type.getDescriptor( TripleFactory.class ) +
                    ")V",
                    null,
                    null);




            mv.visitCode();
            mv.visitVarInsn( ALOAD, 0 );


            mv.visitMethodInsn( INVOKESPECIAL, 
                                Type.getInternalName( TripleBasedStruct.class ),
                                "<init>", 
                                "()V" );
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitVarInsn( ALOAD, 1 );
            mv.visitFieldInsn( PUTFIELD, internalWrapper, "object", descrCore );
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitVarInsn( ALOAD, 2 );
            mv.visitFieldInsn( PUTFIELD, internalWrapper, "store", Type.getDescriptor( TripleStore.class ) );


            mv.visitVarInsn( ALOAD, 0 );
            mv.visitVarInsn( ALOAD, 3 );
            mv.visitMethodInsn( INVOKEVIRTUAL,
                    Type.getInternalName( TripleBasedStruct.class ),
                    "setTripleFactory",
                    "(" + Type.getDescriptor( TripleFactory.class ) + ")V" );
            


            mv.visitVarInsn( ALOAD, 0 );
            mv.visitVarInsn( ALOAD, 2 );
            mv.visitMethodInsn( INVOKEVIRTUAL, 
                                Type.getInternalName( TripleStore.class ),
                                "getId", 
                                "()" + Type.getDescriptor( String.class ) );
            mv.visitFieldInsn( PUTFIELD, 
                               internalWrapper, 
                               "storeId", 
                               Type.getDescriptor( String.class ) );


            mv.visitVarInsn( ALOAD, 0 );
            mv.visitMethodInsn( INVOKESPECIAL, internalWrapper, "initSoftFields", "()V" );
            mv.visitInsn( RETURN );
//            mv.visitMaxs( 2, 4 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();




        }


        buildInitSoftFields( cw, internalWrapper, trait, core, mask );

View Full Code Here

    
    
    protected void buildRemove( ClassWriter cw, String wrapperName, String coreName, ClassDefinition trait, ClassDefinition core, BitSet mask ) {
        String internalWrapper = BuildUtils.getInternalType( wrapperName );


        MethodVisitor mv = cw.visitMethod( ACC_PUBLIC, 
                                           "remove", 
                                           "(" + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Object.class ), 
                                           null, 
                                           null );
        mv.visitCode();


        int stack = 0;
        for ( FieldDefinition field : core.getFieldsDefinitions() ) {
            stack = Math.max( stack, BuildUtils.sizeOf( field.getTypeName() ) );
            invokeRemove( mv, wrapperName, core, field.getName(), field );
        }




        int j = 0;
        for ( FieldDefinition field : trait.getFieldsDefinitions() ) {
            boolean isSoftField = TraitRegistry.isSoftField( field, j++, mask );
            if ( isSoftField ) {
                stack = Math.max( stack, BuildUtils.sizeOf( field.getTypeName() ) );


                mv.visitLdcInsn( field.getName() );
                mv.visitVarInsn( ALOAD, 1 );
                mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( String.class ), "equals", "(" + Type.getDescriptor( Object.class ) + ")Z" );
                Label l2 = new Label();
                mv.visitJumpInsn( IFEQ, l2 );
                mv.visitVarInsn( ALOAD, 0 );
                mv.visitFieldInsn( GETFIELD, internalWrapper, "store", Type.getDescriptor( TripleStore.class ) );
                mv.visitVarInsn( ALOAD, 0);
                mv.visitLdcInsn( field.getName() );
                mv.visitMethodInsn( INVOKEVIRTUAL, 
                                    internalWrapper, 
                                    "propertyKey", 
                                    "(" + Type.getDescriptor( Object.class ) + ")" +  Type.getDescriptor( Triple.class ) );
                mv.visitMethodInsn( INVOKEVIRTUAL, 
                                    Type.getInternalName( TripleStore.class ),
                                    "get", 
                                    "(" + Type.getDescriptor( Triple.class ) + ")" + Type.getDescriptor( Triple.class ) );


                mv.visitVarInsn( ASTORE, 2 );
                mv.visitVarInsn( ALOAD, 0 );
                mv.visitLdcInsn( field.getName() );
                mv.visitInsn( BuildUtils.zero( field.getTypeName() ) );


                if ( BuildUtils.isPrimitive( field.getTypeName() ) ) {
                    TraitFactory.valueOf( mv, field.getTypeName() );
                }
                mv.visitMethodInsn( INVOKESPECIAL, 
                                    Type.getInternalName( TripleBasedStruct.class ),
                                    "put", 
                                    "(" + Type.getDescriptor( String.class ) + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Object.class ) );
                mv.visitInsn( POP );
                mv.visitVarInsn( ALOAD, 2 );
                mv.visitInsn( ARETURN );
                mv.visitLabel( l2 );
            }
        }


        mv.visitVarInsn( ALOAD, 0 );
        mv.visitVarInsn( ALOAD, 1 );
        mv.visitMethodInsn( INVOKESPECIAL, 
                            Type.getInternalName( TripleBasedStruct.class ),
                            "remove", 
                            "(" + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Object.class ) );


        mv.visitVarInsn( ASTORE, 2 );
        mv.visitVarInsn( ALOAD, 2 );
        mv.visitInsn( ARETURN );
//        mv.visitMaxs( 2 + stack, 3 );
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();


    }

View Full Code Here

        return false;
    }


    protected void buildInitSoftFields( ClassWriter cw, String wrapperName, ClassDefinition trait, ClassDefinition core, BitSet mask ) {


        MethodVisitor mv = cw.visitMethod(ACC_PRIVATE, "initSoftFields", "()V", null, null);
        mv.visitCode();


        int stackSize = initSoftFields( mv, wrapperName, trait, core, mask );


        mv.visitInsn(RETURN);
//        mv.visitMaxs(4 + stackSize, 2);
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();
    }

View Full Code Here

    protected void buildClear( ClassWriter cw, String wrapperName, String coreName, ClassDefinition trait, ClassDefinition core, BitSet mask ) {
        String internalWrapper = BuildUtils.getInternalType( wrapperName );


        boolean hasPrimitiveFields = false;
        boolean hasObjectFields = false;
        MethodVisitor mv = cw.visitMethod( ACC_PUBLIC, "clear", "()V", null, null );
        mv.visitCode();


        for ( FieldDefinition field : core.getFieldsDefinitions() ) {
            if ( field.isKey() ) continue;
            if ( BuildUtils.isPrimitive( field.getTypeName() ) ) {
                hasPrimitiveFields = true;
            } else {
                hasObjectFields = true;
            }
            TraitFactory.invokeInjector( mv, wrapperName, trait, core, field, true, 1 );    
        }


        int stack = 2;
        if ( hasPrimitiveFields ) {
            stack++;
        }
        if ( hasObjectFields ) {
            stack++;
        }


        mv.visitVarInsn( ALOAD, 0 );
        mv.visitMethodInsn( INVOKESPECIAL, Type.getInternalName( TripleBasedStruct.class ), "clear", "()V" );




        mv.visitVarInsn( ALOAD, 0 );
        mv.visitMethodInsn( INVOKESPECIAL, internalWrapper, "clearSoftFields", "()V" );


        mv.visitInsn( RETURN );
//        mv.visitMaxs( stack , 1 );
        mv.visitMaxs( 0, 0 );
        mv.visitEnd();




    }

View Full Code Here

    }






    protected void buildSpecificMethods(ClassWriter cw, String wrapper, ClassDefinition core) {
        MethodVisitor mv;


        {
            mv = cw.visitMethod( ACC_PUBLIC, "hashCode", "()I", null, null );
            mv.visitCode();
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitFieldInsn( GETFIELD, BuildUtils.getInternalType( wrapper ), "object", BuildUtils.getTypeDescriptor( core.getName() ));
            mv.visitMethodInsn( INVOKEVIRTUAL, 
                                BuildUtils.getInternalType( wrapper ), 
                                "getTriplesForSubject", 
                                "(" + Type.getDescriptor( Object.class ) + ")" +  Type.getDescriptor( Collection.class ) );
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( Object.class ), "hashCode", "()I" );
            mv.visitInsn( IRETURN );
//            mv.visitMaxs( 2, 1 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();
        }


        {
            mv = cw.visitMethod( ACC_PROTECTED, "getObject", "()" + Type.getDescriptor( Object.class ), null, null );
            mv.visitCode();
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitFieldInsn( GETFIELD, BuildUtils.getInternalType( wrapper ), "object", BuildUtils.getTypeDescriptor( core.getName() ) );
            mv.visitInsn( ARETURN );
//            mv.visitMaxs( 1, 1 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();
        }
        {
            mv = cw.visitMethod(ACC_PUBLIC, "setObject", "(" + Type.getDescriptor( Object.class ) + ")V", null, null );
            mv.visitCode();
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitVarInsn( ALOAD, 1 );
            mv.visitTypeInsn( CHECKCAST, BuildUtils.getInternalType( core.getName() ) );
            mv.visitFieldInsn( PUTFIELD, BuildUtils.getInternalType( wrapper ), "object", BuildUtils.getTypeDescriptor( core.getName() ) );
            mv.visitInsn( RETURN );
//            mv.visitMaxs( 2, 2 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();
        }


    }

View Full Code Here








    protected void buildCommonMethods( ClassWriter cw, String proxy ) {
        MethodVisitor mv;
        {
            mv = cw.visitMethod( ACC_PUBLIC, "toString", "()" + Type.getDescriptor( String.class ), null, null );
            mv.visitCode();
            mv.visitTypeInsn( NEW, Type.getInternalName( StringBuilder.class ) );
            mv.visitInsn( DUP );
            mv.visitMethodInsn( INVOKESPECIAL, Type.getInternalName( StringBuilder.class ), "<init>", "()V" );
            mv.visitLdcInsn( "(@" + proxy + ") : " );
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( StringBuilder.class ), "append", "(" + Type.getDescriptor( String.class ) + ")" + Type.getDescriptor( StringBuilder.class ) );
            mv.visitVarInsn( ALOAD, 0 );
            mv.visitMethodInsn( INVOKEVIRTUAL, BuildUtils.getInternalType( proxy ), "getFields", "()" + Type.getDescriptor( Map.class ) );
            mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( Map.class ) , "entrySet", "()" + Type.getDescriptor( Set.class ) );
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( Object.class ), "toString", "()" + Type.getDescriptor( String.class ));
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( StringBuilder.class ), "append", "(" + Type.getDescriptor( String.class ) + ")" + Type.getDescriptor( StringBuilder.class ) );
            mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( StringBuilder.class ), "toString", "()" + Type.getDescriptor( String.class ));
            mv.visitInsn( ARETURN );
//            mv.visitMaxs( 2, 1 );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();


        }


    }

View Full Code Here

        buildSynchFields( cw, TraitFactory.getProxyName(trait, core), trait, core, mask );
    }


    protected void buildSynchFields( ClassWriter cw, String proxyName, ClassDefinition trait, ClassDefinition core, BitSet mask ) {
        {
            MethodVisitor mv = cw.visitMethod( ACC_PRIVATE, "synchFields", Type.getMethodDescriptor( Type.VOID_TYPE, new Type[] { Type.BOOLEAN_TYPE } ), null, null );
            mv.visitCode();


            if ( core.isFullTraiting() ) {
                Iterator<FieldDefinition> iter = trait.getFieldsDefinitions().iterator();
                for ( int j = 0; j < trait.getFieldsDefinitions().size(); j++ ) {
                    FieldDefinition fld = iter.next();
                    boolean hardField = ! TraitRegistry.isSoftField( fld, j, mask );
                    synchFieldLogical( mv, fld, proxyName, trait, core, hardField, j + 3 );
                }
            } else {
                for ( FieldDefinition fld : trait.getFieldsDefinitions() ) {
                    if ( fld.getInitExpr() != null ) {
                        synchField( mv, fld, proxyName );
                    }
                }
            }


            mv.visitInsn( RETURN );
            mv.visitMaxs( 0, 0 );
            mv.visitEnd();
        }
    }

View Full Code Here

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