Package org.codehaus.jackson.org.objectweb.asm

Examples of org.codehaus.jackson.org.objectweb.asm.MethodVisitor

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        // muchos important: level at least 1.5 to get generics!!!
        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, generatedClass, null, superClass, null);
        cw.visitSource(srcName + ".java", null);

        // add default (no-arg) constructor:
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, superClass, "<init>", "()V");
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0); // don't care (real values: 1,1)
        mv.visitEnd();
       
        final String beanClass = internalClassName(beanType.getName());
        // and then add various accessors; first field accessors:
        if (!_intFields.isEmpty()) {
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     */

    private static void _addIntGetters(ClassWriter cw, List<IntMethodPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "intGetter", "(Ljava/lang/Object;I)I", /*generic sig*/null, null);
        mv.visitCode();
        // first: cast bean to proper type
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);

        // Ok; minor optimization, 4 or less accessors, just do IFs; over that, use switch
        if (props.size() <= 4) {
            _addGettersUsingIf(mv, props, beanClass, IRETURN, ALL_INT_CONSTS);
        } else {
            _addGettersUsingSwitch(mv, props, beanClass, IRETURN);
        }
        // and if no match, generate exception:
        generateException(mv, beanClass, props.size());
        mv.visitMaxs(0, 0); // don't care (real values: 1,1)
        mv.visitEnd();
    }
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    }

    private static void _addLongGetters(ClassWriter cw, List<LongMethodPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "longGetter", "(Ljava/lang/Object;I)J", /*generic sig*/null, null);
        mv.visitCode();
        // first: cast bean to proper type
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);

        if (props.size() < 4) {
            _addGettersUsingIf(mv, props, beanClass, LRETURN, ALL_INT_CONSTS);
        } else {
            _addGettersUsingSwitch(mv, props, beanClass, LRETURN);
        }

        // and if no match, generate exception:
        generateException(mv, beanClass, props.size());

        // and that's it
        mv.visitMaxs(0, 0); // don't care (real values: 1,1)
        mv.visitEnd();
    }
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    }

    private static void _addStringGetters(ClassWriter cw, List<StringMethodPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "stringGetter", "(Ljava/lang/Object;I)Ljava/lang/String;", /*generic sig*/null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);
        if (props.size() < 4) {
            _addGettersUsingIf(mv, props, beanClass, ARETURN, ALL_INT_CONSTS);
        } else {
            _addGettersUsingSwitch(mv, props, beanClass, ARETURN);
        }
        generateException(mv, beanClass, props.size());
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
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            // (b) copy-constructor which takes StdValueInstantiator instance, passes to superclass
            final String optimizedValueInstDesc = Type.getDescriptor(OptimizedValueInstantiator.class);
            final String stdValueInstDesc = Type.getDescriptor(StdValueInstantiator.class);

            // default (no-arg) constructor:
            MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
            mv.visitCode();
            mv.visitVarInsn(ALOAD, 0);
            mv.visitMethodInsn(INVOKESPECIAL, superClass, "<init>", "()V");
            mv.visitInsn(RETURN);
            mv.visitMaxs(0, 0);
            mv.visitEnd();
            // then single-arg constructor
            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "("+stdValueInstDesc+")V", null, null);
            mv.visitCode();
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitMethodInsn(INVOKESPECIAL, superClass, "<init>", "("+stdValueInstDesc+")V");
            mv.visitInsn(RETURN);
            mv.visitMaxs(0, 0);
            mv.visitEnd();

            // and then non-static factory method to use second constructor (implements base-class method)
            // protected abstract OptimizedValueInstantiator with(StdValueInstantiator src);
            mv = cw.visitMethod(ACC_PUBLIC, "with", "("
                    +stdValueInstDesc+")"+optimizedValueInstDesc, null, null);
            mv.visitCode();
            mv.visitTypeInsn(NEW, generatedClass);
            mv.visitInsn(DUP);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitMethodInsn(INVOKESPECIAL, generatedClass, "<init>", "("+stdValueInstDesc+")V");
            mv.visitInsn(ARETURN);
            mv.visitMaxs(0, 0);
            mv.visitEnd();

            // And then override: public Object createUsingDefault()
            mv = cw.visitMethod(ACC_PUBLIC, "createUsingDefault", "()Ljava/lang/Object;", null, null);
            mv.visitCode();
           
            if (ctor != null) {
                addCreator(mv, ctor);
            } else {
                addCreator(mv, factory);
            }
            mv.visitInsn(ARETURN);
            mv.visitMaxs(0, 0);
            mv.visitEnd();

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

    private static void _addObjectGetters(ClassWriter cw, List<ObjectMethodPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "objectGetter", "(Ljava/lang/Object;I)Ljava/lang/Object;", /*generic sig*/null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);
        if (props.size() < 4) {
            _addGettersUsingIf(mv, props, beanClass, ARETURN, ALL_INT_CONSTS);
        } else {
            _addGettersUsingSwitch(mv, props, beanClass, ARETURN);
        }
        generateException(mv, beanClass, props.size());
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
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     */
   
    private static void _addIntFields(ClassWriter cw, List<IntFieldPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "intField", "(Ljava/lang/Object;I)I", /*generic sig*/null, null);
        mv.visitCode();
        // first: cast bean to proper type
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);

        // Ok; minor optimization, less than 4 accessors, just do IFs; over that, use switch
        if (props.size() < 4) {
            _addFieldsUsingIf(mv, props, beanClass, IRETURN, ALL_INT_CONSTS);
        } else {
            _addFieldsUsingSwitch(mv, props, beanClass, IRETURN, "I");
        }
        // and if no match, generate exception:
        generateException(mv, beanClass, props.size());
        mv.visitMaxs(0, 0); // don't care (real values: 1,1)
        mv.visitEnd();
    }
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    }

    private static void _addLongFields(ClassWriter cw, List<LongFieldPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "longField", "(Ljava/lang/Object;I)J", /*generic sig*/null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);

        if (props.size() < 4) {
            _addFieldsUsingIf(mv, props, beanClass, LRETURN, ALL_INT_CONSTS);
        } else {
            _addFieldsUsingSwitch(mv, props, beanClass, LRETURN, "J");
        }
        // and if no match, generate exception:
        generateException(mv, beanClass, props.size());
        mv.visitMaxs(0, 0); // don't care (real values: 1,1)
        mv.visitEnd();
    }
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    }

    private static void _addStringFields(ClassWriter cw, List<StringFieldPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "stringField", "(Ljava/lang/Object;I)Ljava/lang/String;", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);

        if (props.size() < 4) {
            _addFieldsUsingIf(mv, props, beanClass, ARETURN, ALL_INT_CONSTS);
        } else {
            _addFieldsUsingSwitch(mv, props, beanClass, ARETURN, "Ljava/lang/String;");
        }
        generateException(mv, beanClass, props.size());
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
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    }

    private static void _addObjectFields(ClassWriter cw, List<ObjectFieldPropertyWriter> props,
            String beanClass)
    {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "objectField", "(Ljava/lang/Object;I)Ljava/lang/Object;", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, beanClass);
        mv.visitVarInsn(ASTORE, 3);

        if (props.size() < 4) {
            _addFieldsUsingIf(mv, props, beanClass, ARETURN, ALL_INT_CONSTS);
        } else {
            _addFieldsUsingSwitch(mv, props, beanClass, ARETURN, "Ljava/lang/Object;");
        }
        generateException(mv, beanClass, props.size());
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
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Related Classes of org.codehaus.jackson.org.objectweb.asm.MethodVisitor

  • com.fasterxml.jackson.module.afterburner.deser.CreatorOptimizer
  • com.fasterxml.jackson.module.afterburner.ser.PropertyAccessorCollector
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