AsmSupport研究心得(四)
数组
声明数组分配内存不赋值
| /** * 声明数组分配内存不赋值 */ @Test public void testDefineArray() { ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.DefineArray", null, null); creator.createMethod("method1", new AClass[] {}, new String[] {}, AClass.VOID_ACLASS, null, Opcodes.ACC_PUBLIC, new CommonMethodBody() {
@Override public void body(LocalVariable... argus) { //声明new int[2][3]; ArrayValue av = newArray(AClassFactory.getArrayClass(int[][].class), Value.value(2), Value.value(2)); LocalVariable array1 = createArrayVariable(AClassFactory.getArrayClass(int[][].class), "array1", false, null); assign(array1, av);
LocalVariable array2 = createArrayVariable(AClassFactory.getArrayClass(int[][].class), "array2", false, newArray(AClassFactory.getArrayClass(int[][].class), Value.value(2), Value.value(2))); } });
creator.setClassOutPutPath(".//target//"); creator.startup(); } |
声明数组分配内存赋值
| /** * 声明数组分配内存赋值 */ @Test public void testDefineArrayAndAssign() { ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.DefineArrayAndAssign", null, null); creator.createMethod("method1", new AClass[] {}, new String[] {}, AClass.VOID_ACLASS, null, Opcodes.ACC_PUBLIC, new CommonMethodBody() {
@Override public void body(LocalVariable... argus) { //声明new int[2][3]; ArrayValue av = newArrayWithValue(AClassFactory.getArrayClass(String[].class), new Parameterized[]{Value.value("one"),Value.value("two") }); LocalVariable array1 = createArrayVariable(AClassFactory.getArrayClass(String[].class), "array1", false, null); assign(array1, av); LocalVariable array2 = createArrayVariable(AClassFactory.getArrayClass(String[].class), "array2", false, newArrayWithValue(AClassFactory.getArrayClass(String[].class), new Parameterized[]{Value.value("one"),Value.value("two") }));
} });
creator.setClassOutPutPath(".//target//"); creator.startup(); } |
访问数组内容
| /** * 获取数组内容 */ @Test public void testGetArray() { ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.GetArray", null, null); creator.createMethod("method1", new AClass[] {}, new String[] {}, AClass.VOID_ACLASS, null, Opcodes.ACC_PUBLIC, new CommonMethodBody() {
@Override public void body(LocalVariable... argus) { GlobalVariable systemOut = AClassFactory.getProductClass(System.class).getGlobalVariable("out"); LocalVariable array2 = createArrayVariable(AClassFactory.getArrayClass(String[][].class), "array2", false, newArrayWithValue(AClassFactory.getArrayClass(String[][].class), new Parameterized[][]{{Value.value("one"),Value.value("two")},{Value.value("1")} })); invoke(systemOut, "println", arrayLoad(array2, Value.value(0), Value.value(0))); invoke(systemOut, "println", arrayLoad(array2, Value.value(0), Value.value(1))); invoke(systemOut, "println", arrayLoad(array2, Value.value(1), Value.value(0))); runReturn(); } });
creator.setClassOutPutPath(".//target//"); Class clazz = creator.startup(); try { Object obj = clazz.newInstance(); Method m = clazz.getMethod("method1"); m.invoke(obj); } catch (Exception e) { e.printStackTrace(); } } |
赋值数组内容
| /** * 赋值给数组 */ @Test public void testSetArray() { ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.SetArray", null, null); creator.createMethod("method1", new AClass[] {}, new String[] {}, AClass.VOID_ACLASS, null, Opcodes.ACC_PUBLIC, new CommonMethodBody() {
@Override public void body(LocalVariable... argus) { GlobalVariable systemOut = AClassFactory.getProductClass(System.class).getGlobalVariable("out"); LocalVariable array2 = createArrayVariable(AClassFactory.getArrayClass(String[][].class), "array2", false, newArrayWithValue(AClassFactory.getArrayClass(String[][].class), new Parameterized[][]{{Value.value("one"),Value.value("two")},{Value.value("1")} })); arrayStore(array2, Value.value("this is a fixed1"), Value.value(0), Value.value(0)); arrayStore(array2, Value.value("this is a fixed2"), Value.value(0), Value.value(1)); arrayStore(array2, Value.value("this is a fixed3"), Value.value(1), Value.value(0)); invoke(systemOut, "println", arrayLoad(array2, Value.value(0), Value.value(0))); invoke(systemOut, "println", arrayLoad(array2, Value.value(0), Value.value(1))); invoke(systemOut, "println", arrayLoad(array2, Value.value(1), Value.value(0))); runReturn(); } });
creator.setClassOutPutPath(".//target//"); Class clazz = creator.startup(); try { Object obj = clazz.newInstance(); Method m = clazz.getMethod("method1"); m.invoke(obj); } catch (Exception e) { e.printStackTrace(); } } |
创建对象
创建无参构造
| /** * 创建一个无参构造 */ @Test public void testNewNoParamConstructor(){ ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.NewNoParamConstructor", null, null); creator.createConstructor(new AClass[]{}, new String[]{}, new InitBody() { @Override public void body(LocalVariable... argus) { //此句必须有，调用父类构造函数 invokeSuperConstructor(argus); GlobalVariable systemOut = AClassFactory.getProductClass(System.class).getGlobalVariable("out"); invoke(systemOut, "println", Value.value("this is a no param Constructor")); //退出块 runReturn(); } }, Opcodes.ACC_PUBLIC); creator.setClassOutPutPath(".//target//"); Class clazz = creator.startup(); try { Object obj = clazz.newInstance(); } catch (Exception e) { e.printStackTrace(); } } |
创建有参构造
| /** * 创建一个有参构造 */ @Test public void testNewHasParamConstructor(){ ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.NewHasParamConstructor", Exception.class, null); creator.createConstructor(new AClass[]{AClass.STRING_ACLASS}, new String[]{"message"}, new InitBody() { @Override public void body(LocalVariable... argus) { //此句必须有，调用父类构造函数 invokeSuperConstructor(argus[0]); GlobalVariable systemOut = AClassFactory.getProductClass(System.class).getGlobalVariable("out"); invoke(systemOut, "println", argus[0]); invoke(systemOut, "println", Value.value("this is a no param Constructor")); //退出块 runReturn(); } }, Opcodes.ACC_PUBLIC); creator.setClassOutPutPath(".//target//"); Class clazz = creator.startup(); try { Constructor c= clazz.getConstructor(String.class); Object obj = c.newInstance("this is a test"); } catch (Exception e) { e.printStackTrace(); } } |
调用构造函数创建一个匿名对象
| /** * 创建一个匿名对象 */ @Test public void testNewObject(){ ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.NewObject", Exception.class, null); creator.createConstructor(new AClass[]{AClass.STRING_ACLASS}, new String[]{"message"}, new InitBody() { @Override public void body(LocalVariable... argus) { //此句必须有，调用父类构造函数 invokeSuperConstructor(argus[0]); GlobalVariable systemOut = AClassFactory.getProductClass(System.class).getGlobalVariable("out"); invoke(systemOut, "println", argus[0]); invoke(systemOut, "println", Value.value("this is a no param Constructor")); invoke(systemOut, "println", invokeConstructor(AClass.STRING_ACLASS, Value.value("this is String"))); //退出块 runReturn(); } }, Opcodes.ACC_PUBLIC); creator.setClassOutPutPath(".//target//"); Class clazz = creator.startup(); try { Constructor c= clazz.getConstructor(String.class); Object obj = c.newInstance("this is a test"); } catch (Exception e) { e.printStackTrace(); } } |
调用构造函数创建一个具名对象
| /** * 调用构造函数，创建一个具名对象 */ @Test public void testNewObject2(){ ClassCreator creator = new ClassCreator(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "generated.create.NewObject2", Exception.class, null); creator.createConstructor(new AClass[]{AClass.STRING_ACLASS}, new String[]{"message"}, new InitBody() { @Override public void body(LocalVariable... argus) { //此句必须有，调用父类构造函数 invokeSuperConstructor(argus[0]); GlobalVariable systemOut = AClassFactory.getProductClass(System.class).getGlobalVariable("out"); invoke(systemOut, "println", argus[0]); invoke(systemOut, "println", Value.value("this is a no param Constructor")); MethodInvoker mi = invokeConstructor(AClass.STRING_ACLASS, Value.value("this is String")); LocalVariable str = createVariable(AClass.STRING_ACLASS, "str", false, mi); invoke(systemOut, "println",str); //退出块 runReturn(); } }, Opcodes.ACC_PUBLIC); creator.setClassOutPutPath(".//target//"); Class clazz = creator.startup(); try { Constructor c= clazz.getConstructor(String.class); Object obj = c.newInstance("this is a test"); } catch (Exception e) { e.printStackTrace(); } } |