jodd-proxetta/src/main/java/jodd/proxetta/asm/ProxettaMethodBuilder.java
public void createProxyMethod(final TargetMethodData td) {
		final ProxyAspectData aspectData = td.getProxyData();

		int access = td.msign.getAccessFlags();

		access &= ~ACC_NATIVE;
		access &= ~ACC_ABSTRACT;
		access = ProxettaAsmUtil.makePrivateFinalAccess(access);

		final MethodVisitor mv = wd.dest.visitMethod(access, td.methodName(), td.msign.getDescription(), null, null);
		mv.visitCode();

		//*** VISIT ADVICE - called for each aspect and each method
		aspectData.getAdviceClassReader().accept(new EmptyClassVisitor() {

			@Override
			public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) {

				if (!name.equals(ProxettaNames.executeMethodName)) {
					return null;
				}

				return new HistoryMethodAdapter(mv) {

					@Override
					public void visitFieldInsn(final int opcode, String owner, String name, final String desc) {
						if (owner.equals(aspectData.adviceReference)) {
							owner = wd.thisReference;              // [F5]
							name = adviceFieldName(name, aspectData.aspectIndex);
						}
						super.visitFieldInsn(opcode, owner, name, desc);
					}


					@Override
					public void visitVarInsn(final int opcode, int var) {
						var += (var == 0 ? 0 : td.msign.getAllArgumentsSize());

						if (proxyInfoRequested) {
							proxyInfoRequested = false;
							if (opcode == ASTORE) {
								ProxyTargetReplacement.info(mv, td.msign, var);
							}
						}

						super.visitVarInsn(opcode, var);   // [F1]
					}

					@Override
					public void visitIincInsn(int var, final int increment) {
						var += (var == 0 ? 0 : td.msign.getAllArgumentsSize());
						super.visitIincInsn(var, increment);  // [F1]
					}

					@Override
					public void visitInsn(final int opcode) {
						if (opcode == ARETURN) {
							visitReturn(mv, td.msign, true);
							return;
						}
						if (traceNext) {
							if ((opcode == POP) || (opcode == POP2)) {      // [F3] - invoke invoked without assignment
								return;
							}
						}
						super.visitInsn(opcode);
					}

					@SuppressWarnings({"ParameterNameDiffersFromOverriddenParameter"})
					@Override
					public void visitMethodInsn(final int opcode, String string, String mname, final String mdesc, final boolean isInterface) {
						if ((opcode == INVOKEVIRTUAL) || (opcode == INVOKEINTERFACE) || (opcode == INVOKESPECIAL)) {
							if (string.equals(aspectData.adviceReference)) {
								string = wd.thisReference;
								mname = adviceMethodName(mname, aspectData.aspectIndex);
							}
						} else

						if (opcode == INVOKESTATIC) {
							if (string.equals(aspectData.adviceReference)) {
								string = wd.thisReference;
								mname = adviceMethodName(mname, aspectData.aspectIndex);
							} else

							if (string.endsWith('/' + TARGET_CLASS_NAME)) {

								if (isInvokeMethod(mname, mdesc)) {           // [R7]
									if (td.isLastMethodInChain()) {                            // last proxy method just calls super target method

										if (!wd.isWrapper()) {
											// PROXY
											loadSpecialMethodArguments(mv, td.msign);
											mv.visitMethodInsn(INVOKESPECIAL, wd.superReference, td.msign.getMethodName(), td.msign.getDescription(), isInterface);
										} else {
											// WRAPPER
											mv.visitVarInsn(ALOAD, 0);
											mv.visitFieldInsn(GETFIELD, wd.thisReference, wd.wrapperRef, wd.wrapperType);
											loadVirtualMethodArguments(mv, td.msign);
											if (wd.wrapInterface) {
												mv.visitMethodInsn(
													INVOKEINTERFACE,
													wd.wrapperType.substring(1, wd.wrapperType.length() - 1),
													td.msign.getMethodName(),
													td.msign.getDescription(),
													true);
											} else {
												mv.visitMethodInsn(
													INVOKEVIRTUAL,
													wd.wrapperType.substring(1, wd.wrapperType.length() - 1),
													td.msign.getMethodName(),
													td.msign.getDescription(),
													isInterface);
											}
										}

										prepareReturnValue(mv, td.msign, aspectData.maxLocalVarOffset);     // [F4]
										traceNext = true;
									} else {                                                    // calls next proxy method
										loadSpecialMethodArguments(mv, td.msign);
										mv.visitMethodInsn(INVOKESPECIAL, wd.thisReference, td.nextMethodName(), td.msign.getDescription(), isInterface);
										visitReturn(mv, td.msign, false);
									}
									return;
								}

								if (isArgumentsCountMethod(mname, mdesc)) {		// [R2]
									ProxyTargetReplacement.argumentsCount(mv, td.msign);
									return;
								}

								if (isArgumentTypeMethod(mname, mdesc)) {      // [R3]
									int argIndex = this.getArgumentIndex();
									ProxyTargetReplacement.argumentType(mv, td.msign, argIndex);
									return;
								}

								if (isArgumentMethod(mname, mdesc)) {           // [R4]
									int argIndex = this.getArgumentIndex();
									ProxyTargetReplacement.argument(mv, td.msign, argIndex);
									return;
								}

								if (isSetArgumentMethod(mname, mdesc)) {           // [R5]
									int argIndex = this.getArgumentIndex();
									checkArgumentIndex(td.msign, argIndex);
									mv.visitInsn(POP);
									storeMethodArgumentFromObject(mv, td.msign, argIndex);
									return;
								}

								if (isCreateArgumentsArrayMethod(mname, mdesc)) {  // [R6]
									ProxyTargetReplacement.createArgumentsArray(mv, td.msign);
									return;
								}

								if (isCreateArgumentsClassArrayMethod(mname, mdesc)) {     // [R11]
									ProxyTargetReplacement.createArgumentsClassArray(mv, td.msign);
									return;
								}

								if (isTargetMethod(mname, mdesc)) {       // [R9.1]
									mv.visitVarInsn(ALOAD, 0);
									return;
								}

								if (isTargetClassMethod(mname, mdesc)) {       // [R9]
									ProxyTargetReplacement.targetClass(mv, td.msign);
									//ProxyTargetReplacement.targetClass(mv, wd.superReference);
									return;
								}

								if (isTargetMethodNameMethod(mname, mdesc)) {  // [R10]
									ProxyTargetReplacement.targetMethodName(mv, td.msign);
									return;
								}

								if (isTargetMethodSignatureMethod(mname, mdesc)) {
									ProxyTargetReplacement.targetMethodSignature(mv, td.msign);
									return;
								}

								if (isTargetMethodDescriptionMethod(mname, mdesc)) {
									ProxyTargetReplacement.targetMethodDescription(mv, td.msign);
									return;
								}

								if (isInfoMethod(mname, mdesc)) {
									// we are NOT replacing info() here! First, we need to figure out
									// what is the operand for the very next ASTORE instructions
									// since we need to create an object and store it in this
									// register - and reuse it, in replacement code.

									//ProxyTargetReplacement.info(mv, td.msign);
									proxyInfoRequested = true;
									return;
								}

								if (isReturnTypeMethod(mname, mdesc)) {        // [R11]
									ProxyTargetReplacement.returnType(mv, td.msign);
									return;
								}

								if (isReturnValueMethod(mname, mdesc)) {
									castToReturnType(mv, td.msign);
									return;
								}

								if (isTargetMethodAnnotationMethod(mname, mdesc)) {
									String[] args = getLastTwoStringArguments();

									// pop current two args
									mv.visitInsn(POP);
									mv.visitInsn(POP);

									ProxyTargetReplacement.targetMethodAnnotation(mv, td.msign, args);
									return;
								}

								if (isTargetClassAnnotationMethod(mname, mdesc)) {
									String[] args = getLastTwoStringArguments();

									// pop current two args
									mv.visitInsn(POP);
									mv.visitInsn(POP);

									ProxyTargetReplacement.targetClassAnnotation(mv, td.msign.getClassInfo(), args);
									return;
								}
							}
						}
						super.visitMethodInsn(opcode, string, mname, mdesc, isInterface);
					}

				};
			}

		}, 0);
	}
public void createProxyMethod(final TargetMethodData td) {
		final ProxyAspectData aspectData = td.getProxyData();

		int access = td.msign.getAccessFlags();

		access &= ~ACC_NATIVE;
		access &= ~ACC_ABSTRACT;
		access = ProxettaAsmUtil.makePrivateFinalAccess(access);

		final MethodVisitor mv = wd.dest.visitMethod(access, td.methodName(), td.msign.getDescription(), null, null);
		mv.visitCode();

		//*** VISIT ADVICE - called for each aspect and each method
		aspectData.getAdviceClassReader().accept(new EmptyClassVisitor() {

			@Override
			public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) {

				if (!name.equals(ProxettaNames.executeMethodName)) {
					return null;
				}

				return new HistoryMethodAdapter(mv) {

					@Override
					public void visitFieldInsn(final int opcode, String owner, String name, final String desc) {
						if (owner.equals(aspectData.adviceReference)) {
							owner = wd.thisReference;              // [F5]
							name = adviceFieldName(name, aspectData.aspectIndex);
						}
						super.visitFieldInsn(opcode, owner, name, desc);
					}


					@Override
					public void visitVarInsn(final int opcode, int var) {
						var += (var == 0 ? 0 : td.msign.getAllArgumentsSize());

						if (proxyInfoRequested) {
							proxyInfoRequested = false;
							if (opcode == ASTORE) {
								ProxyTargetReplacement.info(mv, td.msign, var);
							}
						}

						super.visitVarInsn(opcode, var);   // [F1]
					}

					@Override
					public void visitIincInsn(int var, final int increment) {
						var += (var == 0 ? 0 : td.msign.getAllArgumentsSize());
						super.visitIincInsn(var, increment);  // [F1]
					}

					@Override
					public void visitInsn(final int opcode) {
						if (opcode == ARETURN) {
							visitReturn(mv, td.msign, true);
							return;
						}
						if (traceNext) {
							if ((opcode == POP) || (opcode == POP2)) {      // [F3] - invoke invoked without assignment
								return;
							}
						}
						super.visitInsn(opcode);
					}

					@SuppressWarnings({"ParameterNameDiffersFromOverriddenParameter"})
					@Override
					public void visitMethodInsn(final int opcode, String string, String mname, final String mdesc, final boolean isInterface) {
						if ((opcode == INVOKEVIRTUAL) || (opcode == INVOKEINTERFACE) || (opcode == INVOKESPECIAL)) {
							if (string.equals(aspectData.adviceReference)) {
								string = wd.thisReference;
								mname = adviceMethodName(mname, aspectData.aspectIndex);
							}
						} else

						if (opcode == INVOKESTATIC) {
							if (string.equals(aspectData.adviceReference)) {
								string = wd.thisReference;
								mname = adviceMethodName(mname, aspectData.aspectIndex);
							} else

							if (string.endsWith('/' + TARGET_CLASS_NAME)) {

								if (isInvokeMethod(mname, mdesc)) {           // [R7]
									if (td.isLastMethodInChain()) {                            // last proxy method just calls super target method

										if (!wd.isWrapper()) {
											// PROXY
											loadSpecialMethodArguments(mv, td.msign);
											mv.visitMethodInsn(INVOKESPECIAL, wd.superReference, td.msign.getMethodName(), td.msign.getDescription(), isInterface);
										} else {
											// WRAPPER
											mv.visitVarInsn(ALOAD, 0);
											mv.visitFieldInsn(GETFIELD, wd.thisReference, wd.wrapperRef, wd.wrapperType);
											loadVirtualMethodArguments(mv, td.msign);
											if (wd.wrapInterface) {
												mv.visitMethodInsn(
													INVOKEINTERFACE,
													wd.wrapperType.substring(1, wd.wrapperType.length() - 1),
													td.msign.getMethodName(),
													td.msign.getDescription(),
													true);
											} else {
												mv.visitMethodInsn(
													INVOKEVIRTUAL,
													wd.wrapperType.substring(1, wd.wrapperType.length() - 1),
													td.msign.getMethodName(),
													td.msign.getDescription(),
													isInterface);
											}
										}

										prepareReturnValue(mv, td.msign, aspectData.maxLocalVarOffset);     // [F4]
										traceNext = true;
									} else {                                                    // calls next proxy method
										loadSpecialMethodArguments(mv, td.msign);
										mv.visitMethodInsn(INVOKESPECIAL, wd.thisReference, td.nextMethodName(), td.msign.getDescription(), isInterface);
										visitReturn(mv, td.msign, false);
									}
									return;
								}

								if (isArgumentsCountMethod(mname, mdesc)) {		// [R2]
									ProxyTargetReplacement.argumentsCount(mv, td.msign);
									return;
								}

								if (isArgumentTypeMethod(mname, mdesc)) {      // [R3]
									int argIndex = this.getArgumentIndex();
									ProxyTargetReplacement.argumentType(mv, td.msign, argIndex);
									return;
								}

								if (isArgumentMethod(mname, mdesc)) {           // [R4]
									int argIndex = this.getArgumentIndex();
									ProxyTargetReplacement.argument(mv, td.msign, argIndex);
									return;
								}

								if (isSetArgumentMethod(mname, mdesc)) {           // [R5]
									int argIndex = this.getArgumentIndex();
									checkArgumentIndex(td.msign, argIndex);
									mv.visitInsn(POP);
									storeMethodArgumentFromObject(mv, td.msign, argIndex);
									return;
								}

								if (isCreateArgumentsArrayMethod(mname, mdesc)) {  // [R6]
									ProxyTargetReplacement.createArgumentsArray(mv, td.msign);
									return;
								}

								if (isCreateArgumentsClassArrayMethod(mname, mdesc)) {     // [R11]
									ProxyTargetReplacement.createArgumentsClassArray(mv, td.msign);
									return;
								}

								if (isTargetMethod(mname, mdesc)) {       // [R9.1]
									mv.visitVarInsn(ALOAD, 0);
									return;
								}

								if (isTargetClassMethod(mname, mdesc)) {       // [R9]
									ProxyTargetReplacement.targetClass(mv, td.msign);
									//ProxyTargetReplacement.targetClass(mv, wd.superReference);
									return;
								}

								if (isTargetMethodNameMethod(mname, mdesc)) {  // [R10]
									ProxyTargetReplacement.targetMethodName(mv, td.msign);
									return;
								}

								if (isTargetMethodSignatureMethod(mname, mdesc)) {
									ProxyTargetReplacement.targetMethodSignature(mv, td.msign);
									return;
								}

								if (isTargetMethodDescriptionMethod(mname, mdesc)) {
									ProxyTargetReplacement.targetMethodDescription(mv, td.msign);
									return;
								}

								if (isInfoMethod(mname, mdesc)) {
									// we are NOT replacing info() here! First, we need to figure out
									// what is the operand for the very next ASTORE instructions
									// since we need to create an object and store it in this
									// register - and reuse it, in replacement code.

									//ProxyTargetReplacement.info(mv, td.msign);
									proxyInfoRequested = true;
									return;
								}

								if (isReturnTypeMethod(mname, mdesc)) {        // [R11]
									ProxyTargetReplacement.returnType(mv, td.msign);
									return;
								}

								if (isReturnValueMethod(mname, mdesc)) {
									castToReturnType(mv, td.msign);
									return;
								}

								if (isTargetMethodAnnotationMethod(mname, mdesc)) {
									String[] args = getLastTwoStringArguments();

									// pop current two args
									mv.visitInsn(POP);
									mv.visitInsn(POP);

									ProxyTargetReplacement.targetMethodAnnotation(mv, td.msign, args);
									return;
								}

								if (isTargetClassAnnotationMethod(mname, mdesc)) {
									String[] args = getLastTwoStringArguments();

									// pop current two args
									mv.visitInsn(POP);
									mv.visitInsn(POP);

									ProxyTargetReplacement.targetClassAnnotation(mv, td.msign.getClassInfo(), args);
									return;
								}
							}
						}
						super.visitMethodInsn(opcode, string, mname, mdesc, isInterface);
					}

				};
			}

		}, 0);
	}
public void createProxyMethod ( final TargetMethodData td ) { final ProxyAspectData aspectData = td . getProxyData ( ) ; int access = td . msign . getAccessFlags ( ) ; access &= ~ ACC_NATIVE ; access &= ~ ACC_ABSTRACT ; access = ProxettaAsmUtil . makePrivateFinalAccess ( access ) ; final MethodVisitor mv = wd . dest . visitMethod ( access , td . methodName ( ) , td . msign . getDescription ( ) , null , null ) ; mv . visitCode ( ) ; //*** VISIT ADVICE - called for each aspect and each method aspectData . getAdviceClassReader ( ) . accept ( new EmptyClassVisitor ( ) { @ Override public MethodVisitor visitMethod ( final int access , final String name , final String desc , final String signature , final String [ ] exceptions ) { if ( ! name . equals ( ProxettaNames . executeMethodName ) ) { return null ; } return new HistoryMethodAdapter ( mv ) { @ Override public void visitFieldInsn ( final int opcode , String owner , String name , final String desc ) { if ( owner . equals ( aspectData . adviceReference ) ) { owner = wd . thisReference ; // [F5] name = adviceFieldName ( name , aspectData . aspectIndex ) ; } super . visitFieldInsn ( opcode , owner , name , desc ) ; } @ Override public void visitVarInsn ( final int opcode , int var ) { var += ( var == 0 ? 0 : td . msign . getAllArgumentsSize ( ) ) ; if ( proxyInfoRequested ) { proxyInfoRequested = false ; if ( opcode == ASTORE ) { ProxyTargetReplacement . info ( mv , td . msign , var ) ; } } super . visitVarInsn ( opcode , var ) ; // [F1] } @ Override public void visitIincInsn ( int var , final int increment ) { var += ( var == 0 ? 0 : td . msign . getAllArgumentsSize ( ) ) ; super . visitIincInsn ( var , increment ) ; // [F1] } @ Override public void visitInsn ( final int opcode ) { if ( opcode == ARETURN ) { visitReturn ( mv , td . msign , true ) ; return ; } if ( traceNext ) { if ( ( opcode == POP ) || ( opcode == POP2 ) ) { // [F3] - invoke invoked without assignment return ; } } super . visitInsn ( opcode ) ; } @ SuppressWarnings ( { "ParameterNameDiffersFromOverriddenParameter" } ) @ Override public void visitMethodInsn ( final int opcode , String string , String mname , final String mdesc , final boolean isInterface ) { if ( ( opcode == INVOKEVIRTUAL ) || ( opcode == INVOKEINTERFACE ) || ( opcode == INVOKESPECIAL ) ) { if ( string . equals ( aspectData . adviceReference ) ) { string = wd . thisReference ; mname = adviceMethodName ( mname , aspectData . aspectIndex ) ; } } else if ( opcode == INVOKESTATIC ) { if ( string . equals ( aspectData . adviceReference ) ) { string = wd . thisReference ; mname = adviceMethodName ( mname , aspectData . aspectIndex ) ; } else if ( string . endsWith ( ' ' + TARGET_CLASS_NAME ) ) { if ( isInvokeMethod ( mname , mdesc ) ) { // [R7] if ( td . isLastMethodInChain ( ) ) { // last proxy method just calls super target method if ( ! wd . isWrapper ( ) ) { // PROXY loadSpecialMethodArguments ( mv , td . msign ) ; mv . visitMethodInsn ( INVOKESPECIAL , wd . superReference , td . msign . getMethodName ( ) , td . msign . getDescription ( ) , isInterface ) ; } else { // WRAPPER mv . visitVarInsn ( ALOAD , 0 ) ; mv . visitFieldInsn ( GETFIELD , wd . thisReference , wd . wrapperRef , wd . wrapperType ) ; loadVirtualMethodArguments ( mv , td . msign ) ; if ( wd . wrapInterface ) { mv . visitMethodInsn ( INVOKEINTERFACE , wd . wrapperType . substring ( 1 , wd . wrapperType . length ( ) - 1 ) , td . msign . getMethodName ( ) , td . msign . getDescription ( ) , true ) ; } else { mv . visitMethodInsn ( INVOKEVIRTUAL , wd . wrapperType . substring ( 1 , wd . wrapperType . length ( ) - 1 ) , td . msign . getMethodName ( ) , td . msign . getDescription ( ) , isInterface ) ; } } prepareReturnValue ( mv , td . msign , aspectData . maxLocalVarOffset ) ; // [F4] traceNext = true ; } else { // calls next proxy method loadSpecialMethodArguments ( mv , td . msign ) ; mv . visitMethodInsn ( INVOKESPECIAL , wd . thisReference , td . nextMethodName ( ) , td . msign . getDescription ( ) , isInterface ) ; visitReturn ( mv , td . msign , false ) ; } return ; } if ( isArgumentsCountMethod ( mname , mdesc ) ) { // [R2] ProxyTargetReplacement . argumentsCount ( mv , td . msign ) ; return ; } if ( isArgumentTypeMethod ( mname , mdesc ) ) { // [R3] int argIndex = this . getArgumentIndex ( ) ; ProxyTargetReplacement . argumentType ( mv , td . msign , argIndex ) ; return ; } if ( isArgumentMethod ( mname , mdesc ) ) { // [R4] int argIndex = this . getArgumentIndex ( ) ; ProxyTargetReplacement . argument ( mv , td . msign , argIndex ) ; return ; } if ( isSetArgumentMethod ( mname , mdesc ) ) { // [R5] int argIndex = this . getArgumentIndex ( ) ; checkArgumentIndex ( td . msign , argIndex ) ; mv . visitInsn ( POP ) ; storeMethodArgumentFromObject ( mv , td . msign , argIndex ) ; return ; } if ( isCreateArgumentsArrayMethod ( mname , mdesc ) ) { // [R6] ProxyTargetReplacement . createArgumentsArray ( mv , td . msign ) ; return ; } if ( isCreateArgumentsClassArrayMethod ( mname , mdesc ) ) { // [R11] ProxyTargetReplacement . createArgumentsClassArray ( mv , td . msign ) ; return ; } if ( isTargetMethod ( mname , mdesc ) ) { // [R9.1] mv . visitVarInsn ( ALOAD , 0 ) ; return ; } if ( isTargetClassMethod ( mname , mdesc ) ) { // [R9] ProxyTargetReplacement . targetClass ( mv , td . msign ) ; //ProxyTargetReplacement.targetClass(mv, wd.superReference); return ; } if ( isTargetMethodNameMethod ( mname , mdesc ) ) { // [R10] ProxyTargetReplacement . targetMethodName ( mv , td . msign ) ; return ; } if ( isTargetMethodSignatureMethod ( mname , mdesc ) ) { ProxyTargetReplacement . targetMethodSignature ( mv , td . msign ) ; return ; } if ( isTargetMethodDescriptionMethod ( mname , mdesc ) ) { ProxyTargetReplacement . targetMethodDescription ( mv , td . msign ) ; return ; } if ( isInfoMethod ( mname , mdesc ) ) { // we are NOT replacing info() here! First, we need to figure out // what is the operand for the very next ASTORE instructions // since we need to create an object and store it in this // register - and reuse it, in replacement code. //ProxyTargetReplacement.info(mv, td.msign); proxyInfoRequested = true ; return ; } if ( isReturnTypeMethod ( mname , mdesc ) ) { // [R11] ProxyTargetReplacement . returnType ( mv , td . msign ) ; return ; } if ( isReturnValueMethod ( mname , mdesc ) ) { castToReturnType ( mv , td . msign ) ; return ; } if ( isTargetMethodAnnotationMethod ( mname , mdesc ) ) { String [ ] args = getLastTwoStringArguments ( ) ; // pop current two args mv . visitInsn ( POP ) ; mv . visitInsn ( POP ) ; ProxyTargetReplacement . targetMethodAnnotation ( mv , td . msign , args ) ; return ; } if ( isTargetClassAnnotationMethod ( mname , mdesc ) ) { String [ ] args = getLastTwoStringArguments ( ) ; // pop current two args mv . visitInsn ( POP ) ; mv . visitInsn ( POP ) ; ProxyTargetReplacement . targetClassAnnotation ( mv , td . msign . getClassInfo ( ) , args ) ; return ; } } } super . visitMethodInsn ( opcode , string , mname , mdesc , isInterface ) ; } } ; } } , 0 ) ; }
Creates proxy methods over target method, For each matched proxy, new proxy method is created
by taking advice bytecode and replaces usages of {@link jodd.proxetta.ProxyTarget}.
<p>
Invocation chain example: {@code name -> name$p0 -> name$p1 -> name$p4 -> super}.
Creates proxy methods over target method For each matched proxy new proxy method is created by taking advice bytecode and replaces usages of {