Examples of org.drools.asm.MethodVisitor

org.drools.asm.MethodVisitor
A visitor to visit a Java method. The methods of this interface must be called in the following order: [ visitAnnotationDefault ] ( visitAnnotation | visitParameterAnnotation | visitAttribute )* [ visitCode ( visitXInsn | visitLabel | visitTryCatchBlock | visitLocalVariable | 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, and the visitLocalVariable and visitLineNumber methods must be called after the labels passed as arguments have been visited. @author Eric Bruneton

    }


    protected static void buildUpdateProxyMethod(final Map fieldTypes,
                                                 final String className,
                                                 final ClassWriter cw) {
        final MethodVisitor mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                                 ShadowProxyFactory.UPDATE_PROXY,
                                                 Type.getMethodDescriptor( Type.VOID_TYPE,
                                                                           new Type[]{} ),
                                                 null,
                                                 null );
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel( l0 );
        for ( final Iterator it = fieldTypes.entrySet().iterator(); it.hasNext(); ) {
            final Map.Entry entry = (Map.Entry) it.next();
            final String fieldName = (String) entry.getKey();
            final String fieldFlag = fieldName + ShadowProxyFactory.FIELD_SET_FLAG;
            final Class fieldType = ((Method) entry.getValue()).getReturnType();
            final Label l1 = new Label();
            mv.visitLabel( l1 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            if ( fieldType.isPrimitive() ) {
                if ( fieldType.equals( Long.TYPE ) ) {
                    mv.visitInsn( Opcodes.LCONST_0 );
                } else if ( fieldType.equals( Double.TYPE ) ) {
                    mv.visitInsn( Opcodes.DCONST_0 );
                } else if ( fieldType.equals( Float.TYPE ) ) {
                    mv.visitInsn( Opcodes.FCONST_0 );
                } else {
                    mv.visitInsn( Opcodes.ICONST_0 );
                }
            } else {
                mv.visitInsn( Opcodes.ACONST_NULL );
            }
            mv.visitFieldInsn( Opcodes.PUTFIELD,
                               className,
                               fieldName,
                               Type.getDescriptor( fieldType ) );
            final Label l2 = new Label();
            mv.visitLabel( l2 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitInsn( Opcodes.ICONST_0 );
            mv.visitFieldInsn( Opcodes.PUTFIELD,
                               className,
                               fieldFlag,
                               Type.BOOLEAN_TYPE.getDescriptor() );
        }


        //    this.__hashCache = 0;
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitInsn( Opcodes.ICONST_0 );
        mv.visitFieldInsn( Opcodes.PUTFIELD,
                           className,
                           ShadowProxyFactory.HASHCACHE_FIELD_NAME,
                           Type.getDescriptor( int.class ) );


        final Label l4 = new Label();
        mv.visitLabel( l4 );
        mv.visitInsn( Opcodes.RETURN );
        final Label l5 = new Label();
        mv.visitLabel( l5 );
        mv.visitLocalVariable( "this",
                               "L" + className + ";",
                               null,
                               l0,
                               l5,
                               0 );
        mv.visitMaxs( 0,
                      0 );
        mv.visitEnd();
    }

View Full Code Here


    protected static void buildSetShadowedObject(final Class clazz,
                                                 final String className,
                                                 final Method setShadowed,
                                                 final ClassWriter cw) {
        final MethodVisitor mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                                 setShadowed.getName(),
                                                 Type.getMethodDescriptor( setShadowed ),
                                                 null,
                                                 null );
        mv.visitCode();
        Label l0 = new Label();
        mv.visitLabel( l0 );
        // this.delegate = (<clazz>) object;
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         1 );
        mv.visitTypeInsn( Opcodes.CHECKCAST,
                          Type.getInternalName( clazz ) );
        mv.visitFieldInsn( Opcodes.PUTFIELD,
                           className,
                           DELEGATE_FIELD_NAME,
                           Type.getDescriptor( clazz ) );
        if ( Collection.class.isAssignableFrom( clazz ) || Map.class.isAssignableFrom( clazz ) ) {
            Label l1 = new Label();
            mv.visitLabel( l1 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                                className,
                                UPDATE_PROXY,
                                Type.getMethodDescriptor( Type.VOID_TYPE,
                                                          new Type[0] ) );
        }
        Label l2 = new Label();
        mv.visitLabel( l2 );
        mv.visitInsn( Opcodes.RETURN );
        Label l3 = new Label();
        mv.visitLabel( l3 );
        mv.visitLocalVariable( "this",
                               "L" + className + ";",
                               null,
                               l0,
                               l3,
                               0 );
        mv.visitLocalVariable( "object",
                               Type.getDescriptor( Object.class ),
                               null,
                               l0,
                               l3,
                               1 );
        mv.visitMaxs( 0,
                      0 );
        mv.visitEnd();
    }

View Full Code Here

     * @param cw
     */
    protected static void buildCollectionUpdateProxyMethod(final Class clazz,
                                                           final String className,
                                                           final ClassWriter cw) {
        final MethodVisitor mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                                 ShadowProxyFactory.UPDATE_PROXY,
                                                 Type.getMethodDescriptor( Type.VOID_TYPE,
                                                                           new Type[]{} ),
                                                 null,
                                                 null );
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel( l0 );
        // this.clear();
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                            className,
                            "clear",
                            Type.getMethodDescriptor( Type.VOID_TYPE,
                                                      new Type[0] ) );
        Label l1 = new Label();
        mv.visitLabel( l1 );
        // this.addAll( this.delegate );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitFieldInsn( Opcodes.GETFIELD,
                           className,
                           DELEGATE_FIELD_NAME,
                           Type.getDescriptor( clazz ) );
        mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                            className,
                            "addAll",
                            Type.getMethodDescriptor( Type.BOOLEAN_TYPE,
                                                      new Type[]{Type.getType( Collection.class )} ) );
        mv.visitInsn( Opcodes.POP );
        Label l2 = new Label();
        mv.visitLabel( l2 );
        mv.visitInsn( Opcodes.RETURN );
        Label l3 = new Label();
        mv.visitLabel( l3 );
        mv.visitLocalVariable( "this",
                               "L" + className + ";",
                               null,
                               l0,
                               l3,
                               0 );
        mv.visitMaxs( 0,
                      0 );
        mv.visitEnd();
    }

View Full Code Here

     * @param cw
     */
    protected static void buildMapUpdateProxyMethod(final Class clazz,
                                                    final String className,
                                                    final ClassWriter cw) {
        final MethodVisitor mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                                 ShadowProxyFactory.UPDATE_PROXY,
                                                 Type.getMethodDescriptor( Type.VOID_TYPE,
                                                                           new Type[]{} ),
                                                 null,
                                                 null );
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel( l0 );
        // this.clear();
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                            className,
                            "clear",
                            Type.getMethodDescriptor( Type.VOID_TYPE,
                                                      new Type[0] ) );
        Label l1 = new Label();
        mv.visitLabel( l1 );
        // this.putAll( this.delegate );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitFieldInsn( Opcodes.GETFIELD,
                           className,
                           DELEGATE_FIELD_NAME,
                           Type.getDescriptor( clazz ) );
        mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                            className,
                            "putAll",
                            Type.getMethodDescriptor( Type.VOID_TYPE,
                                                      new Type[]{Type.getType( Map.class )} ) );
        Label l2 = new Label();
        mv.visitLabel( l2 );
        mv.visitInsn( Opcodes.RETURN );
        Label l3 = new Label();
        mv.visitLabel( l3 );
        mv.visitLocalVariable( "this",
                               "L" + className + ";",
                               null,
                               l0,
                               l3,
                               0 );
        mv.visitMaxs( 0,
                      0 );
        mv.visitEnd();
    }

View Full Code Here

     * @param cw
     */
    private static void buildConstructor(final Class clazz,
                                         final String className,
                                         final ClassWriter cw) {
        MethodVisitor mv;
        {
            mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                 "<init>",
                                 Type.getMethodDescriptor( Type.VOID_TYPE,
                                                           new Type[]{Type.getType( clazz )} ),
                                 null,
                                 null );
            mv.visitCode();


            // super();
            final Label l0 = new Label();
            mv.visitLabel( l0 );
            mv.visitLineNumber( 41,
                                l0 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            if ( clazz.isInterface() ) {
                mv.visitMethodInsn( Opcodes.INVOKESPECIAL,
                                    Type.getInternalName( Object.class ),
                                    "<init>",
                                    Type.getMethodDescriptor( Type.VOID_TYPE,
                                                              new Type[]{} ) );
            } else {
                mv.visitMethodInsn( Opcodes.INVOKESPECIAL,
                                    Type.getInternalName( clazz ),
                                    "<init>",
                                    Type.getMethodDescriptor( Type.VOID_TYPE,
                                                              new Type[]{} ) );
            }


            // this.delegate = delegate
            final Label l1 = new Label();
            mv.visitLabel( l1 );
            mv.visitLineNumber( 42,
                                l1 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            mv.visitFieldInsn( Opcodes.PUTFIELD,
                               className,
                               ShadowProxyFactory.DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );


            // return
            final Label l2 = new Label();
            mv.visitLabel( l2 );
            mv.visitLineNumber( 43,
                                l2 );
            mv.visitInsn( Opcodes.RETURN );


            final Label l3 = new Label();
            mv.visitLabel( l3 );
            mv.visitLocalVariable( "this",
                                   "L" + className + ";",
                                   null,
                                   l0,
                                   l3,
                                   0 );
            mv.visitLocalVariable( ShadowProxyFactory.DELEGATE_FIELD_NAME,
                                   Type.getDescriptor( clazz ),
                                   null,
                                   l0,
                                   l3,
                                   1 );
            mv.visitMaxs( 0,
                          0 );
            mv.visitEnd();
        }
    }

View Full Code Here

                                         final Class clazz,
                                         final ClassWriter cw) {
        // method signature 
        final Class[] exceptionTypes = method.getExceptionTypes();
        final String[] exceptions = getExceptionArrayAsString( exceptionTypes );
        final MethodVisitor mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                                 method.getName(),
                                                 Type.getMethodDescriptor( method ),
                                                 null,
                                                 exceptions );
        mv.visitCode();


        // if ( ! _fieldIsSet ) {
        final Label l0 = new Label();
        mv.visitLabel( l0 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitFieldInsn( Opcodes.GETFIELD,
                           className,
                           fieldFlag,
                           Type.BOOLEAN_TYPE.getDescriptor() );
        final Label l1 = new Label();
        mv.visitJumpInsn( Opcodes.IFNE,
                          l1 );


        //     __fieldIsSet = true;
        final Label l3 = new Label();
        mv.visitLabel( l3 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitInsn( Opcodes.ICONST_1 );
        mv.visitFieldInsn( Opcodes.PUTFIELD,
                           className,
                           fieldFlag,
                           Type.BOOLEAN_TYPE.getDescriptor() );


        if ( Map.class.isAssignableFrom( fieldType ) || Collection.class.isAssignableFrom( fieldType ) || fieldType.isArray() ) {


            // FieldType aux = this.delegate.getField();
            Label l01 = new Label();
            mv.visitLabel( l01 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            if ( clazz.isInterface() ) {
                mv.visitMethodInsn( Opcodes.INVOKEINTERFACE,
                                    Type.getInternalName( clazz ),
                                    method.getName(),
                                    Type.getMethodDescriptor( method ) );
            } else {
                mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                                    Type.getInternalName( clazz ),
                                    method.getName(),
                                    Type.getMethodDescriptor( method ) );
            }
            mv.visitVarInsn( Opcodes.ASTORE,
                             1 );


            // this.field = (FieldType) ShadoProxyUtils.clone( aux );
            Label l11 = new Label();
            mv.visitLabel( l11 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            mv.visitMethodInsn( Opcodes.INVOKESTATIC,
                                Type.getInternalName( ShadowProxyUtils.class ),
                                "cloneObject",
                                "(Ljava/lang/Object;)Ljava/lang/Object;" );
            mv.visitTypeInsn( Opcodes.CHECKCAST,
                              Type.getInternalName( fieldType ) );
            mv.visitFieldInsn( Opcodes.PUTFIELD,
                               className,
                               fieldName,
                               Type.getDescriptor( fieldType ) );


        } else {
            //     __field = this.delegate.method();
            final Label l2 = new Label();
            mv.visitLabel( l2 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               ShadowProxyFactory.DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            if ( clazz.isInterface() ) {
                mv.visitMethodInsn( Opcodes.INVOKEINTERFACE,
                                    Type.getInternalName( clazz ),
                                    method.getName(),
                                    Type.getMethodDescriptor( method ) );
            } else {
                mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                                    Type.getInternalName( clazz ),
                                    method.getName(),
                                    Type.getMethodDescriptor( method ) );
            }
            mv.visitFieldInsn( Opcodes.PUTFIELD,
                               className,
                               fieldName,
                               Type.getDescriptor( fieldType ) );


        }


        // }
        // return __field;
        mv.visitLabel( l1 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitFieldInsn( Opcodes.GETFIELD,
                           className,
                           fieldName,
                           Type.getDescriptor( fieldType ) );
        mv.visitInsn( Type.getType( fieldType ).getOpcode( Opcodes.IRETURN ) );


        // local variables table
        final Label l4 = new Label();
        mv.visitLabel( l4 );
        mv.visitLocalVariable( "this",
                               "L" + className + ";",
                               null,
                               l0,
                               l4,
                               0 );
        mv.visitMaxs( 0,
                      0 );
        mv.visitEnd();
    }

View Full Code Here

                                              final String className,
                                              final ClassWriter cw) {


        // creating method visitor
        final String[] exceptions = getExceptionArrayAsString( method.getExceptionTypes() );
        final MethodVisitor mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                                 method.getName(),
                                                 Type.getMethodDescriptor( method ),
                                                 null,
                                                 exceptions );
        mv.visitCode();


        // return this.delegate.method(...);
        final Label l0 = new Label();
        mv.visitLabel( l0 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         0 );
        mv.visitFieldInsn( Opcodes.GETFIELD,
                           className,
                           ShadowProxyFactory.DELEGATE_FIELD_NAME,
                           Type.getDescriptor( clazz ) );


        final Class[] parameters = method.getParameterTypes();
        for ( int i = 0, offset = 1; i < parameters.length; i++ ) {
            Type type = Type.getType( parameters[i] );
            mv.visitVarInsn( type.getOpcode( Opcodes.ILOAD ),
                             offset );
            offset += type.getSize();
        }
        if ( clazz.isInterface() ) {
            mv.visitMethodInsn( Opcodes.INVOKEINTERFACE,
                                Type.getInternalName( clazz ),
                                method.getName(),
                                Type.getMethodDescriptor( method ) );
        } else {
            mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                                Type.getInternalName( clazz ),
                                method.getName(),
                                Type.getMethodDescriptor( method ) );
        }
        mv.visitInsn( Type.getType( method.getReturnType() ).getOpcode( Opcodes.IRETURN ) );
        final Label l1 = new Label();
        mv.visitLabel( l1 );
        mv.visitLocalVariable( "this",
                               "L" + className + ";",
                               null,
                               l0,
                               l1,
                               0 );
        for ( int i = 0, offset = 0; i < parameters.length; i++ ) {
            mv.visitLocalVariable( "arg" + i,
                                   Type.getDescriptor( parameters[i] ),
                                   null,
                                   l0,
                                   l1,
                                   offset );
            offset += Type.getType( parameters[i] ).getSize();
        }
        mv.visitMaxs( 0,
                      0 );
        mv.visitEnd();
    }

View Full Code Here


    protected static void buildEquals(final ClassWriter cw,
                                      final String className,
                                      final Class clazz,
                                      final Map fieldTypes) {
        MethodVisitor mv;
        // Building equals method
        {
            mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                 "equals",
                                 Type.getMethodDescriptor( Type.BOOLEAN_TYPE,
                                                           new Type[]{Type.getType( Object.class )} ),
                                 null,
                                 null );
            mv.visitCode();
            final Label l0 = new Label();
            mv.visitLabel( l0 );


            // if ( this == object || this.delegate == object || this.delegate.equals( object ) ) {
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            final Label l1 = new Label();
            mv.visitJumpInsn( Opcodes.IF_ACMPEQ,
                              l1 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            mv.visitJumpInsn( Opcodes.IF_ACMPEQ,
                              l1 );
            
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            mv.visitVarInsn(Opcodes.ALOAD, 1);
            if ( clazz.isInterface() ) {
                mv.visitMethodInsn( Opcodes.INVOKEINTERFACE,
                                    Type.getInternalName( clazz ),
                                    "equals",
                                    Type.getMethodDescriptor( Type.BOOLEAN_TYPE,
                                                              new Type[]{Type.getType( Object.class )} ) );
            } else {
                mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                                    Type.getInternalName( clazz ),
                                    "equals",
                                    Type.getMethodDescriptor( Type.BOOLEAN_TYPE,
                                                              new Type[]{Type.getType( Object.class )} ) );
            }
            Label l2 = new Label();
            mv.visitJumpInsn(Opcodes.IFEQ, l2);
            
            //      return true;
            mv.visitLabel( l1 );
            mv.visitInsn( Opcodes.ICONST_1 );
            mv.visitInsn( Opcodes.IRETURN );
            mv.visitLabel( l2 );


            // if (( object == null ) || ( ! ( object instanceof <class> ) ) ) 
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            final Label l3 = new Label();
            mv.visitJumpInsn( Opcodes.IFNULL,
                              l3 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            mv.visitTypeInsn( Opcodes.INSTANCEOF,
                              Type.getInternalName( clazz ) );
            final Label l4 = new Label();
            mv.visitJumpInsn( Opcodes.IFNE,
                              l4 );


            //       return false;
            mv.visitLabel( l3 );
            mv.visitInsn( Opcodes.ICONST_0 );
            mv.visitInsn( Opcodes.IRETURN );
            mv.visitLabel( l4 );


            // if( object instanceof ShadowProxy && 
            //     ( this.delegate == ((ShadowProxy)object).delegate ||
            //       this.delegate.equals( ((ShadowProxy)object).delegate ) ) ) {
            Label c0 = new Label();
            mv.visitLabel( c0 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            mv.visitTypeInsn( Opcodes.INSTANCEOF,
                              className );
            Label c1 = new Label();
            mv.visitJumpInsn( Opcodes.IFEQ,
                              c1 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            mv.visitTypeInsn( Opcodes.CHECKCAST,
                              className );
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            Label c2 = new Label();
            mv.visitJumpInsn( Opcodes.IF_ACMPEQ,
                              c2 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            mv.visitVarInsn( Opcodes.ALOAD,
                             1 );
            mv.visitTypeInsn( Opcodes.CHECKCAST,
                              className );
            mv.visitFieldInsn( Opcodes.GETFIELD,
                               className,
                               DELEGATE_FIELD_NAME,
                               Type.getDescriptor( clazz ) );
            if ( clazz.isInterface() ) {
                mv.visitMethodInsn( Opcodes.INVOKEINTERFACE,
                                    Type.getInternalName( clazz ),
                                    "equals",
                                    Type.getMethodDescriptor( Type.BOOLEAN_TYPE,
                                                              new Type[]{Type.getType( Object.class )} ) );
            } else {
                mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                                    Type.getInternalName( clazz ),
                                    "equals",
                                    Type.getMethodDescriptor( Type.BOOLEAN_TYPE,
                                                              new Type[]{Type.getType( Object.class )} ) );
            }
            mv.visitJumpInsn( Opcodes.IFEQ,
                              c1 );
            mv.visitLabel( c2 );
            //     return true;
            mv.visitInsn( Opcodes.ICONST_1 );
            mv.visitInsn( Opcodes.IRETURN );
            // }
            mv.visitLabel( c1 );
            


            // return false;
            mv.visitInsn( Opcodes.ICONST_0 );
            mv.visitInsn( Opcodes.IRETURN );
            final Label lastLabel = new Label();
            mv.visitLabel( lastLabel );


            mv.visitLocalVariable( "this",
                                   "L" + className + ";",
                                   null,
                                   l0,
                                   lastLabel,
                                   0 );
            mv.visitLocalVariable( "object",
                                   Type.getDescriptor( Object.class ),
                                   null,
                                   l0,
                                   lastLabel,
                                   1 );


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

View Full Code Here

     * @param cw
     */
    private void build3ArgConstructor(final Class superClazz,
                                      final String className,
                                      final ClassWriter cw) {
        MethodVisitor mv;
        {
            mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                 "<init>",
                                 Type.getMethodDescriptor( Type.VOID_TYPE,
                                                           new Type[]{Type.getType( int.class ), Type.getType( Class.class ), Type.getType( ValueType.class )} ),
                                 null,
                                 null );
            mv.visitCode();
            final Label l0 = new Label();
            mv.visitLabel( l0 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             0 );
            mv.visitVarInsn( Opcodes.ILOAD,
                             1 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             2 );
            mv.visitVarInsn( Opcodes.ALOAD,
                             3 );
            mv.visitMethodInsn( Opcodes.INVOKESPECIAL,
                                Type.getInternalName( superClazz ),
                                "<init>",
                                Type.getMethodDescriptor( Type.VOID_TYPE,
                                                          new Type[]{Type.getType( int.class ), Type.getType( Class.class ), Type.getType( ValueType.class )} ) );
            final Label l1 = new Label();
            mv.visitLabel( l1 );
            mv.visitInsn( Opcodes.RETURN );
            final Label l2 = new Label();
            mv.visitLabel( l2 );
            mv.visitLocalVariable( "this",
                                   "L" + className + ";",
                                   null,
                                   l0,
                                   l2,
                                   0 );
            mv.visitLocalVariable( "index",
                                   Type.getDescriptor( int.class ),
                                   null,
                                   l0,
                                   l2,
                                   1 );
            mv.visitLocalVariable( "fieldType",
                                   Type.getDescriptor( Class.class ),
                                   null,
                                   l0,
                                   l2,
                                   2 );
            mv.visitLocalVariable( "valueType",
                                   Type.getDescriptor( ValueType.class ),
                                   null,
                                   l0,
                                   l2,
                                   3 );
            mv.visitMaxs( 0,
                          0 );
            mv.visitEnd();
        }
    }

View Full Code Here

                                                     new Class[]{InternalWorkingMemory.class, Object.class} );
        } catch ( final Exception e ) {
            throw new RuntimeDroolsException( "This is a bug. Please report back to JBoss Rules team.",
                                              e );
        }
        final MethodVisitor mv = cw.visitMethod( Opcodes.ACC_PUBLIC,
                                                 overridingMethod.getName(),
                                                 Type.getMethodDescriptor( overridingMethod ),
                                                 null,
                                                 null );


        mv.visitCode();


        final Label l0 = new Label();
        mv.visitLabel( l0 );
        mv.visitVarInsn( Opcodes.ALOAD,
                         2 );
        mv.visitTypeInsn( Opcodes.CHECKCAST,
                          Type.getInternalName( originalClass ) );


        if ( originalClass.isInterface() ) {
            mv.visitMethodInsn( Opcodes.INVOKEINTERFACE,
                                Type.getInternalName( originalClass ),
                                getterMethod.getName(),
                                Type.getMethodDescriptor( getterMethod ) );
        } else {
            mv.visitMethodInsn( Opcodes.INVOKEVIRTUAL,
                                Type.getInternalName( originalClass ),
                                getterMethod.getName(),
                                Type.getMethodDescriptor( getterMethod ) );
        }
        mv.visitInsn( Type.getType( fieldType ).getOpcode( Opcodes.IRETURN ) );
        final Label l1 = new Label();
        mv.visitLabel( l1 );
        mv.visitLocalVariable( "this",
                               "L" + className + ";",
                               null,
                               l0,
                               l1,
                               0 );
        mv.visitLocalVariable( "workingMemory",
                               Type.getDescriptor( InternalWorkingMemory.class ),
                               null,
                               l0,
                               l1,
                               1 );
        mv.visitLocalVariable( "object",
                               Type.getDescriptor( Object.class ),
                               null,
                               l0,
                               l1,
                               2 );
        mv.visitMaxs( 0,
                      0 );
        mv.visitEnd();
    }

View Full Code Here

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Related Classes of org.drools.asm.MethodVisitor

org.drools.asm.commons.StaticInitMerger

org.drools.base.ClassFieldAccessorFactory

org.drools.base.ClassFieldExtractorFactory

org.drools.base.ShadowProxyFactory

org.drools.factmodel.ClassBuilder

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