Examples of org.eclipse.persistence.internal.libraries.asm.ClassWriter

Package org.eclipse.persistence.internal.libraries.asm

Examples of org.eclipse.persistence.internal.libraries.asm.ClassWriter

org.eclipse.persistence.internal.libraries.asm.ClassWriter
A {@link ClassVisitor ClassVisitor} that generates Java class files. Moreprecisely this visitor generates a byte array conforming to the Java class file format. It can be used alone, to generate a Java class "from scratch", or with one or more {@link ClassReader ClassReader} and adapter classvisitor to generate a modified class from one or more existing Java classes. @author Eric Bruneton

        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }


    private byte[] generateMultiDimensionalManyValueClass(TypeMappingInfo typeMappingInfo, String namespace, Class superType, String classNameSeparatedBySlash, JavaClass componentType, JavaClass containerType) {
        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
        generateManyValueClass(cw, typeMappingInfo, namespace, superType, classNameSeparatedBySlash, componentType, containerType);
        generateMultiDimensionalManyValueClass(cw, componentType);
        cw.visitEnd();
        return cw.toByteArray();
    }

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    }
    
    public final void begin( String name, Attributes attrs) {
      int major = Integer.parseInt( attrs.getValue( "major"));
      int minor = Integer.parseInt( attrs.getValue( "minor"));
      cw = new ClassWriter( computeMax);
      Map vals = new HashMap();
      vals.put( "version", new Integer(minor << 16 | major));
      vals.put( "access", attrs.getValue( "access"));
      vals.put( "name", attrs.getValue( "name"));
      vals.put( "parent", attrs.getValue( "parent"));

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         * }
         * Later, via reflection, the setNumAttributes method is called with the
         * correct number of attributes
         */
        String classNameAsSlashes = className.replace('.', '/');
        ClassWriter cw = new ClassWriter(true);
        CodeVisitor cv;


        if (className.endsWith(COLLECTION_WRAPPER_SUFFIX)) {
            cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, classNameAsSlashes,
                BASE_ENTITY_COLLECTION_WRAPPER_CLASSNAME_SLASHES, null, null);


            cv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
            cv.visitVarInsn(ALOAD, 0);
            cv.visitMethodInsn(INVOKESPECIAL, BASE_ENTITY_COLLECTION_WRAPPER_CLASSNAME_SLASHES,
                "<init>", "()V");
            cv.visitInsn(RETURN);
            cv.visitMaxs(0, 0);
        }


        else {
            cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, classNameAsSlashes, BASE_ENTITY_CLASSNAME_SLASHES,
                null, null);
           
            cw.visitField(ACC_PUBLIC + ACC_STATIC, "NUM_ATTRIBUTES", "I", null, null);
            cv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
            cv.visitInsn(ICONST_1);
            cv.visitFieldInsn(PUTSTATIC, classNameAsSlashes, "NUM_ATTRIBUTES", "I");
            cv.visitInsn(RETURN);
            cv.visitMaxs(0, 0);
    
            cv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "setNumAttributes", "(Ljava/lang/Integer;)V",
                null, null);
            cv.visitVarInsn(ALOAD, 0);
            cv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I");
            cv.visitFieldInsn(PUTSTATIC, classNameAsSlashes, "NUM_ATTRIBUTES", "I");
            cv.visitInsn(RETURN);
            cv.visitMaxs(0, 0);
    
            cv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "getNumAttributes", "()I", null, null);
            cv.visitFieldInsn(GETSTATIC, classNameAsSlashes, "NUM_ATTRIBUTES", "I");
            cv.visitInsn(IRETURN);
            cv.visitMaxs(0, 0);
    
            cv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
            cv.visitVarInsn(ALOAD, 0);
            cv.visitMethodInsn(INVOKESPECIAL, BASE_ENTITY_CLASSNAME_SLASHES, "<init>", "()V");
            cv.visitVarInsn(ALOAD, 0);
            cv.visitMethodInsn(INVOKESTATIC, classNameAsSlashes, "getNumAttributes", "()I");
            cv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
            cv.visitFieldInsn(PUTFIELD, classNameAsSlashes, "fields", "[Ljava/lang/Object;");
            cv.visitInsn(RETURN);
            cv.visitMaxs(0, 0);
        }
        cw.visitEnd();
        return cw.toByteArray();
    }

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       *     public 'classname'() {
       *       super(); 
       *     }
       *   }
       */
      ClassWriter cw = new ClassWriter(true);
      cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, className, SOAP_RESPONSE_CLASSNAME_SLASHES, null, null);
      
      CodeVisitor cv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
      cv.visitVarInsn(ALOAD, 0);
      cv.visitMethodInsn(INVOKESPECIAL, SOAP_RESPONSE_CLASSNAME_SLASHES, "<init>", "()V");
      cv.visitInsn(RETURN);
      cv.visitMaxs(0, 0);


      cw.visitEnd();
      return cw.toByteArray();
    }

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    /**
     * This is where the byte codes for the generic subclass are defined and the
     * class is created dynamically from them.
     */
    public byte[] createClass() {
        ClassWriter cw = new ClassWriter(false);


        cw.visit(Constants.V1_5, Constants.ACC_PUBLIC + Constants.ACC_SUPER, className.replace('.', '/'), Type.getType(parentClass).getInternalName(), null, null);


        addConstructors(cw);
        addWriteReplace(cw);
        cw.visitEnd();


        return cw.toByteArray();
    }

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        String internalKeyName = keyClass.getQualifiedName().replace(DOT_CHR, SLASH_CHR);
        String internalValueName = valueClass.getQualifiedName().replace(DOT_CHR, SLASH_CHR);


        Type mapType = Type.getType(L + mapClass.getRawName().replace(DOT_CHR, SLASH_CHR) + SEMI_COLON);


        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);


        String sig = "Lorg/eclipse/persistence/internal/jaxb/many/MapValue<L" + mapType.getInternalName() + "<L" + internalKeyName + ";L" + internalValueName + ";>;>;";
        cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, qualifiedInternalClassName, sig, "org/eclipse/persistence/internal/jaxb/many/MapValue", null);


        // Write Field: @... public Map entry
        String fieldSig = L + mapType.getInternalName() + "<L" + internalKeyName + ";L" + internalValueName + ";>;";
        FieldVisitor fv = cw.visitField(Opcodes.ACC_PUBLIC, "entry", L + mapType.getInternalName() + SEMI_COLON, fieldSig, null);
        AnnotationVisitor av = fv.visitAnnotation(Type.getDescriptor(XmlElement.class), true);
        if (typeMappingInfo != null) {
            Annotation[] annotations = typeMappingInfo.getAnnotations();
            if (annotations != null) {
                for (int i = 0; i < annotations.length; i++) {
                    Annotation nextAnnotation = annotations[i];
                    if (nextAnnotation != null && !(nextAnnotation instanceof XmlElement) && !(nextAnnotation instanceof XmlJavaTypeAdapter)) {
                        String annotationClassName = nextAnnotation.annotationType().getName();
                        av = fv.visitAnnotation(L + annotationClassName.replace(DOT_CHR, SLASH_CHR) + SEMI_COLON, true);
                        for (Method next : nextAnnotation.annotationType().getDeclaredMethods()) {
                            try {
                                Object nextValue = next.invoke(nextAnnotation, new Object[] {});
                                if (nextValue instanceof Class) {
                                    Type nextType = Type.getType(L + ((Class) nextValue).getName().replace(DOT_CHR, SLASH_CHR) + SEMI_COLON);
                                    nextValue = nextType;
                                }
                                av.visit(next.getName(), nextValue);
                            } catch (InvocationTargetException ex) {
                                // ignore the invocation target exception here.
                            } catch (IllegalAccessException ex) {
                            }
                        }
                        av.visitEnd();
                    }
                }
            }
        }
        fv.visitEnd();
        
        MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "org/eclipse/persistence/internal/jaxb/many/MapValue", "<init>", "()V");
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();


        // Write: @XmlTransitent public void setItem(???)
        String methodSig = "(L" + mapType.getInternalName() + "<L" + internalKeyName + ";L" + internalValueName + ";>;)V";
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "setItem", "(L" + mapType.getInternalName() + ";)V", methodSig, null);
        // TODO: Verify that we really want to put @XmlTranient on setItem
        // method
        mv.visitAnnotation("Ljavax/xml/bind/annotation/XmlTransient;", true);
        Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, qualifiedInternalClassName, "entry", L + mapType.getInternalName() + SEMI_COLON);
        mv.visitInsn(Opcodes.RETURN);
        Label l1 = new Label();
        mv.visitLabel(l1);


        // Replacement?:LocalVariableTypeTableAttribute cvAttr = new
        // LocalVariableTypeTableAttribute();
        // mv.visitAttribute(cvAttr);


        mv.visitMaxs(2, 2);
        mv.visitEnd();


        // Write @XmlTransient public ??? getItem()
        methodSig = "()L" + mapType.getInternalName() + "<L" + internalKeyName + ";L" + internalValueName + ";>;";
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getItem", "()L" + mapType.getInternalName() + SEMI_COLON, methodSig, null);
        mv.visitAnnotation("Ljavax/xml/bind/annotation/XmlTransient;", true);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, qualifiedInternalClassName, "entry", L + mapType.getInternalName() + SEMI_COLON);
        mv.visitInsn(Opcodes.ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();


        mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_BRIDGE + Opcodes.ACC_SYNTHETIC, "getItem", "()Ljava/lang/Object;", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, qualifiedInternalClassName, "getItem", "()L" + mapType.getInternalName() + SEMI_COLON);
        mv.visitInsn(Opcodes.ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();


        mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_BRIDGE + Opcodes.ACC_SYNTHETIC, "setItem", "(Ljava/lang/Object;)V", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitTypeInsn(Opcodes.CHECKCAST, mapType.getInternalName());
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, qualifiedInternalClassName, "setItem", "(L" + mapType.getInternalName() + ";)V");
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();


        // Write @XmlType(namespace)
        av = cw.visitAnnotation("Ljavax/xml/bind/annotation/XmlType;", true);
        av.visit("namespace", namespace);


        cw.visitEnd();


        byte[] classBytes = cw.toByteArray();
        return generateClassFromBytes(qualifiedClassName, classBytes);
    }

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        }
        return generateClassFromBytes(qualifiedClassName, classBytes);
    }


    private byte[] generateManyValue(TypeMappingInfo typeMappingInfo, String namespace, Class superType, String classNameSeparatedBySlash, JavaClass componentType, JavaClass containerType) {
        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
        generateManyValueClass(cw, typeMappingInfo, namespace, superType, classNameSeparatedBySlash, componentType, containerType);
        cw.visitEnd();
        return cw.toByteArray();
    }

View Full Code Here

        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }


    private byte[] generateMultiDimensionalManyValueClass(TypeMappingInfo typeMappingInfo, String namespace, Class superType, String classNameSeparatedBySlash, JavaClass componentType, JavaClass containerType) {
        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
        generateManyValueClass(cw, typeMappingInfo, namespace, superType, classNameSeparatedBySlash, componentType, containerType);
        generateMultiDimensionalManyValueClass(cw, componentType);
        cw.visitEnd();
        return cw.toByteArray();
    }

View Full Code Here

        return generatedClass;
    }


    private Class generateMapEntryClass(String className, String keyType, String valueType){


        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);


        String qualifiedInternalClassName = className.replace('.', '/');
        String qualifiedInternalKeyClassName = keyType.replace('.', '/');
        String qualifiedInternalValueClassName = valueType.replace('.', '/');


        String sig = "Ljava/lang/Object;Lorg/eclipse/persistence/internal/jaxb/many/MapEntry<L"+qualifiedInternalKeyClassName+";L"+qualifiedInternalValueClassName+";>;";
        cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, qualifiedInternalClassName, sig, "java/lang/Object", new String[] { "org/eclipse/persistence/internal/jaxb/many/MapEntry" });


        cw.visitField(Opcodes.ACC_PRIVATE, "key", "L"+qualifiedInternalKeyClassName+";", null, null);


        cw.visitField(Opcodes.ACC_PRIVATE, "value", "L"+qualifiedInternalValueClassName+";", null, null);


        MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
        
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getKey", "()L"+qualifiedInternalKeyClassName+";", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, qualifiedInternalClassName, "key", "L"+qualifiedInternalKeyClassName+";");
        mv.visitInsn(Opcodes.ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
        
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "setKey", "(L"+qualifiedInternalKeyClassName+";)V", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, qualifiedInternalClassName, "key", "L"+qualifiedInternalKeyClassName+";");
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
        
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getValue", "()L"+qualifiedInternalValueClassName+";", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, qualifiedInternalClassName, "value", "L"+qualifiedInternalValueClassName+";");
        mv.visitInsn(Opcodes.ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
        
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "setValue", "(L"+qualifiedInternalValueClassName+";)V", null, null);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, qualifiedInternalClassName, "value", "L"+qualifiedInternalValueClassName+";");
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
        
        if(!qualifiedInternalValueClassName.equals("java/lang/Object")){
          mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_BRIDGE + Opcodes.ACC_SYNTHETIC, "getValue", "()Ljava/lang/Object;", null, null);
          mv.visitVarInsn(Opcodes.ALOAD, 0);
          mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, qualifiedInternalClassName, "getValue", "()L"+qualifiedInternalValueClassName+";");
          mv.visitInsn(Opcodes.ARETURN);
          mv.visitMaxs(1, 1);
          mv.visitEnd();
          
          mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_BRIDGE + Opcodes.ACC_SYNTHETIC, "setValue", "(Ljava/lang/Object;)V", null, null);
          mv.visitVarInsn(Opcodes.ALOAD, 0);
          mv.visitVarInsn(Opcodes.ALOAD, 1);
          mv.visitTypeInsn(Opcodes.CHECKCAST, qualifiedInternalValueClassName);
          mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, qualifiedInternalClassName, "setValue", "(L"+qualifiedInternalValueClassName+";)V");
          mv.visitInsn(Opcodes.RETURN);
          mv.visitMaxs(2, 2);
          mv.visitEnd();
        }


        if(!qualifiedInternalKeyClassName.equals("java/lang/Object")){
            mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_BRIDGE + Opcodes.ACC_SYNTHETIC, "getKey", "()Ljava/lang/Object;", null, null);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL,qualifiedInternalClassName, "getKey", "()L"+qualifiedInternalKeyClassName+";");
            mv.visitInsn(Opcodes.ARETURN);
            mv.visitMaxs(1, 1);
            mv.visitEnd();
            
            mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_BRIDGE + Opcodes.ACC_SYNTHETIC, "setKey", "(Ljava/lang/Object;)V", null, null);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitVarInsn(Opcodes.ALOAD, 1);
            mv.visitTypeInsn(Opcodes.CHECKCAST, qualifiedInternalKeyClassName);
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, qualifiedInternalClassName, "setKey", "(L"+qualifiedInternalKeyClassName+";)V");
            mv.visitInsn(Opcodes.RETURN);
            mv.visitMaxs(2, 2);
            mv.visitEnd();
        }


        cw.visitEnd();


        byte[] classBytes =cw.toByteArray();
        Class generatedClass = getJaxbClassLoader().generateClass(className, classBytes);
        return generatedClass;
    }

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        }
        return null;
    }


    public Class generateWrapperClass(String className, String attributeType, boolean isList, QName theQName) {
        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);


        String sig = null;
        cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, className.replace(".", "/"), sig, Type.getType(WrappedValue.class).getInternalName(), null);


        String fieldType = null;
        if(isList){
            fieldType ="Ljava/util/List;";
        }else{
            fieldType = attributeType.replace(".", "/");
            if(!(fieldType.startsWith("["))) {
                fieldType = "L" + fieldType + ";";
            }
        }


          if(theQName == null){
            theQName = RESERVED_QNAME;
          }


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


          mv.visitVarInsn(Opcodes.ALOAD, 0);
          mv.visitTypeInsn(Opcodes.NEW, "javax/xml/namespace/QName");
          mv.visitInsn(Opcodes.DUP);
          mv.visitLdcInsn(theQName.getNamespaceURI());
          mv.visitLdcInsn(theQName.getLocalPart());
          mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "javax/xml/namespace/QName", "<init>", "(Ljava/lang/String;Ljava/lang/String;)V");
          mv.visitLdcInsn(Type.getType(fieldType));
          mv.visitInsn(Opcodes.ACONST_NULL);


          mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "org/eclipse/persistence/internal/jaxb/WrappedValue", "<init>", "(Ljavax/xml/namespace/QName;Ljava/lang/Class;Ljava/lang/Object;)V");
          mv.visitInsn(Opcodes.RETURN);
          mv.visitMaxs(5, 1);
          mv.visitEnd();




        cw.visitEnd();


        byte[] classBytes = cw.toByteArray();
        //byte[] classBytes = new byte[]{};


        Class generatedClass = getJaxbClassLoader().generateClass(className, classBytes);
        return generatedClass;
    }

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