Examples of org.drools.util.asm.ClassFieldInspector

org.drools.util.asm.ClassFieldInspector
Visit a POJO user class, and extract the property getter methods that are public, in the order in which they are declared actually in the class itself (not using introspection). This may be enhanced in the future to allow annotations or perhaps external meta data configure the order of the indexes, as this may provide fine tuning options in special cases. @author Michael Neale

     * @param fieldName
     */
    public BaseClassFieldWriter(final Class< ? > clazz,
                                final String fieldName) {
        try {
            final ClassFieldInspector inspector = new ClassFieldInspector( clazz );
            this.index = ((Integer) inspector.getFieldNames().get( fieldName )).intValue();
            this.fieldType = (Class< ? >) inspector.getFieldTypes().get( fieldName );
            this.valueType = ValueType.determineValueType( this.fieldType );
        } catch ( final Exception e ) {
            throw new RuntimeDroolsException( e );
        }
    }

View Full Code Here

     * @param fieldName
     */
    public BaseClassFieldReader(final Class< ? > clazz,
                                final String fieldName) {
        try {
            final ClassFieldInspector inspector = new ClassFieldInspector( clazz );
            this.index = ((Integer) inspector.getFieldNames().get( fieldName )).intValue();
            this.fieldType = (Class< ? >) inspector.getFieldTypes().get( fieldName );
            this.valueType = ValueType.determineValueType( this.fieldType );
        } catch ( final Exception e ) {
            throw new RuntimeDroolsException( e );
        }
    }

View Full Code Here

                return new MVELClassFieldReader( clazz,
                                                 fieldName,
                                                 cache );
            } else {
                // otherwise, bytecode generate a specific extractor
                ClassFieldInspector inspector = inspectors.get( clazz );
                if ( inspector == null ) {
                    inspector = new ClassFieldInspector( clazz );
                    inspectors.put( clazz,
                                    inspector );
                }
                final Class< ? > fieldType = (Class< ? >) inspector.getFieldTypes().get( fieldName );
                final Method getterMethod = (Method) inspector.getGetterMethods().get( fieldName );
                if ( fieldType != null && getterMethod != null ) {
                    final String className = ClassFieldAccessorFactory.BASE_PACKAGE + "/" + Type.getInternalName( clazz ) + Math.abs( System.identityHashCode( clazz ) ) + "$" + getterMethod.getName();


                    // generating byte array to create target class
                    final byte[] bytes = dumpReader( clazz,
                                                     className,
                                                     getterMethod,
                                                     fieldType,
                                                     clazz.isInterface() );
                    // use bytes to get a class 


                    final Class< ? > newClass = byteArrayClassLoader.defineClass( className.replace( '/',
                                                                                                     '.' ),
                                                                                  bytes,
                                                                                  PROTECTION_DOMAIN );
                    // instantiating target class
                    final Integer index = (Integer) inspector.getFieldNames().get( fieldName );
                    final ValueType valueType = ValueType.determineValueType( fieldType );
                    final Object[] params = {index, fieldType, valueType};
                    return (BaseClassFieldReader) newClass.getConstructors()[0].newInstance( params );
                } else {
                    throw new RuntimeDroolsException( "Field/method '" + fieldName + "' not found for class '" + clazz.getName() + "'" );

View Full Code Here

        ByteArrayClassLoader byteArrayClassLoader = cache.getByteArrayClassLoader();
        Map<Class< ? >, ClassFieldInspector> inspectors = cache.getInspectors();
        
        try {
            // otherwise, bytecode generate a specific extractor
            ClassFieldInspector inspector = inspectors.get( clazz );
            if ( inspector == null ) {
                inspector = new ClassFieldInspector( clazz );
                inspectors.put( clazz,
                                inspector );
            }
            final Method setterMethod = (Method) inspector.getSetterMethods().get( fieldName );
            if ( setterMethod != null ) {
                final Class< ? > fieldType = setterMethod.getParameterTypes()[0];
                final String className = ClassFieldAccessorFactory.BASE_PACKAGE + "/" + Type.getInternalName( clazz ) + Math.abs( System.identityHashCode( clazz ) ) + "$" + setterMethod.getName();


                // generating byte array to create target class
                final byte[] bytes = dumpWriter( clazz,
                                                 className,
                                                 setterMethod,
                                                 fieldType,
                                                 clazz.isInterface() );
                // use bytes to get a class 


                final Class< ? > newClass = byteArrayClassLoader.defineClass( className.replace( '/',
                                                                                                 '.' ),
                                                                              bytes,
                                                                              PROTECTION_DOMAIN );
                // instantiating target class
                final Integer index = (Integer) inspector.getFieldNames().get( fieldName );
                final ValueType valueType = ValueType.determineValueType( fieldType );
                final Object[] params = {index, fieldType, valueType};
                return (BaseClassFieldWriter) newClass.getConstructors()[0].newInstance( params );
            } else {
                throw new RuntimeDroolsException( "Field/method '" + fieldName + "' not found for class '" + clazz.getName() + "'" );

View Full Code Here

                return new MVELClassFieldReader( clazz,
                                                 fieldName,
                                                 cache );
            } else {
                // otherwise, bytecode generate a specific extractor
                ClassFieldInspector inspector = inspectors.get( clazz );
                if ( inspector == null ) {
                    inspector = new ClassFieldInspector( clazz );
                    inspectors.put( clazz,
                                    inspector );
                }
                final Class< ? > fieldType = (Class< ? >) inspector.getFieldTypes().get( fieldName );
                final Method getterMethod = (Method) inspector.getGetterMethods().get( fieldName );
                if ( fieldType != null && getterMethod != null ) {
                    final String className = ClassFieldAccessorFactory.BASE_PACKAGE + "/" + Type.getInternalName( clazz ) + Math.abs( System.identityHashCode( clazz ) ) + "$" + getterMethod.getName();


                    // generating byte array to create target class
                    final byte[] bytes = dumpReader( clazz,
                                                     className,
                                                     getterMethod,
                                                     fieldType,
                                                     clazz.isInterface() );
                    // use bytes to get a class 


                    final Class< ? > newClass = byteArrayClassLoader.defineClass( className.replace( '/',
                                                                                                     '.' ),
                                                                                  bytes,
                                                                                  PROTECTION_DOMAIN );
                    // instantiating target class
                    final Integer index = (Integer) inspector.getFieldNames().get( fieldName );
                    final ValueType valueType = ValueType.determineValueType( fieldType );
                    final Object[] params = {index, fieldType, valueType};
                    return (BaseClassFieldReader) newClass.getConstructors()[0].newInstance( params );
                } else {
                    throw new RuntimeDroolsException( "Field/method '" + fieldName + "' not found for class '" + clazz.getName() + "'" );

View Full Code Here

        ByteArrayClassLoader byteArrayClassLoader = cache.getByteArrayClassLoader();
        Map<Class< ? >, ClassFieldInspector> inspectors = cache.getInspectors();
        
        try {
            // otherwise, bytecode generate a specific extractor
            ClassFieldInspector inspector = inspectors.get( clazz );
            if ( inspector == null ) {
                inspector = new ClassFieldInspector( clazz );
                inspectors.put( clazz,
                                inspector );
            }
            final Method setterMethod = (Method) inspector.getSetterMethods().get( fieldName );
            if ( setterMethod != null ) {
                final Class< ? > fieldType = setterMethod.getParameterTypes()[0];
                final String className = ClassFieldAccessorFactory.BASE_PACKAGE + "/" + Type.getInternalName( clazz ) + Math.abs( System.identityHashCode( clazz ) ) + "$" + setterMethod.getName();


                // generating byte array to create target class
                final byte[] bytes = dumpWriter( clazz,
                                                 className,
                                                 setterMethod,
                                                 fieldType,
                                                 clazz.isInterface() );
                // use bytes to get a class 


                final Class< ? > newClass = byteArrayClassLoader.defineClass( className.replace( '/',
                                                                                                 '.' ),
                                                                              bytes,
                                                                              PROTECTION_DOMAIN );
                // instantiating target class
                final Integer index = (Integer) inspector.getFieldNames().get( fieldName );
                final ValueType valueType = ValueType.determineValueType( fieldType );
                final Object[] params = {index, fieldType, valueType};
                return (BaseClassFieldWriter) newClass.getConstructors()[0].newInstance( params );
            } else {
                throw new RuntimeDroolsException( "Field/method '" + fieldName + "' not found for class '" + clazz.getName() + "'" );

View Full Code Here

                return new MVELClassFieldExtractor( clazz,
                                                    fieldName,
                                                    classLoader );
            } else {
                // otherwise, bytecode generate a specific extractor
                ClassFieldInspector inspector = (ClassFieldInspector) inspectors.get( clazz );
                if ( inspector == null ) {
                    inspector = new ClassFieldInspector( clazz );
                    inspectors.put( clazz,
                                    inspector );
                }
                final Class fieldType = (Class) inspector.getFieldTypes().get( fieldName );
                final Method getterMethod = (Method) inspector.getGetterMethods().get( fieldName );
                if ( fieldType != null && getterMethod != null ) {
                    final String className = ClassFieldExtractorFactory.BASE_PACKAGE + "/" + Type.getInternalName( clazz ) + Math.abs( System.identityHashCode( clazz ) ) + "$" + getterMethod.getName();


                    // generating byte array to create target class
                    final byte[] bytes = dump( clazz,
                                               className,
                                               getterMethod,
                                               fieldType,
                                               clazz.isInterface() );
                    // use bytes to get a class 


                    final Class newClass = byteArrayClassLoader.defineClass( className.replace( '/',
                                                                                                '.' ),
                                                                             bytes,
                                                                             PROTECTION_DOMAIN );
                    // instantiating target class
                    final Integer index = (Integer) inspector.getFieldNames().get( fieldName );
                    final ValueType valueType = ValueType.determineValueType( fieldType );
                    final Object[] params = {index, fieldType, valueType};
                    return (BaseClassFieldExtractor) newClass.getConstructors()[0].newInstance( params );
                } else {
                    throw new RuntimeDroolsException( "Field/method '" + fieldName + "' not found for class '" + clazz.getName() + "'" );

View Full Code Here

     * @param fieldName
     */
    public BaseClassFieldExtractor(final Class clazz,
                                   final String fieldName) {
        try {
            final ClassFieldInspector inspector = new ClassFieldInspector( clazz );
            this.index = ((Integer) inspector.getFieldNames().get( fieldName )).intValue();
            this.fieldType = (Class) inspector.getFieldTypes().get( fieldName );
            this.valueType = ValueType.determineValueType( this.fieldType );
        } catch ( final Exception e ) {
            throw new RuntimeDroolsException( e );
        }
    }

View Full Code Here

    private void loadClassFields(final Class clazz,
                                 final String shortTypeName) throws IOException {
        if ( clazz == null ) {
            return;
        }
        final ClassFieldInspector inspector = new ClassFieldInspector( clazz );
        String[] fields = (String[]) inspector.getFieldNames().keySet().toArray( new String[inspector.getFieldNames().size()] );


        fields = removeIrrelevantFields( fields );


        this.builder.addFieldsForType( shortTypeName,
                                       fields );
        for ( int i = 0; i < fields.length; i++ ) {
            final Class type = (Class) inspector.getFieldTypes().get( fields[i] );
            final String fieldType = getFieldType( type );
            this.builder.addFieldType( shortTypeName + "." + fields[i],
                                       fieldType );
        }
    }

View Full Code Here

    private void loadClassFields(final Class clazz,
                                 final String shortTypeName) throws IOException {
        if ( clazz == null ) {
            return;
        }
        final ClassFieldInspector inspector = new ClassFieldInspector( clazz );
        String[] fields = (String[]) inspector.getFieldNames().keySet().toArray( new String[inspector.getFieldNames().size()] );
        Arrays.sort(fields);


        fields = removeIrrelevantFields( fields );


        this.builder.addFieldsForType( shortTypeName,
                                       fields );
        for ( int i = 0; i < fields.length; i++ ) {
            final Class type = (Class) inspector.getFieldTypes().get( fields[i] );
            final String fieldType = getFieldType( type );
            this.builder.addFieldType( shortTypeName + "." + fields[i],
                                       fieldType );
        }
    }

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