org.objectweb.asm.commons
类 AdviceAdapter

java.lang.Object
  org.objectweb.asm.MethodAdapter
      org.objectweb.asm.commons.LocalVariablesSorter
          org.objectweb.asm.commons.GeneratorAdapter
              org.objectweb.asm.commons.AdviceAdapter

所有已实现的接口：

MethodVisitor, Opcodes

public abstract class AdviceAdapter
extends GeneratorAdapter
implements Opcodes

A MethodAdapter to insert before, after and around advices in methods and constructors.

The behavior for constructors is like this:

1. as long as the INVOKESPECIAL for the object initialization has not been reached, every bytecode instruction is dispatched in the ctor code visitor
2. when this one is reached, it is only added in the ctor code visitor and a JP invoke is added
3. after that, only the other code visitor receives the instructions

作者：

Eugene Kuleshov, Eric Bruneton

字段摘要

protected int	methodAccess
protected String	methodDesc

从类 org.objectweb.asm.commons.GeneratorAdapter 继承的字段

ADD, AND, DIV, EQ, GE, GT, LE, LT, MUL, NE, NEG, OR, REM, SHL, SHR, SUB, USHR, XOR

从类 org.objectweb.asm.commons.LocalVariablesSorter 继承的字段

firstLocal, nextLocal

从类 org.objectweb.asm.MethodAdapter 继承的字段

mv

从接口 org.objectweb.asm.Opcodes 继承的字段

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6

构造方法摘要

protected

AdviceAdapter(MethodVisitor mv, int access, String name, String desc) Creates a new AdviceAdapter.

方法摘要

protected void	onMethodEnter() Called at the beginning of the method or after super class class call in the constructor.
protected void	onMethodExit(int opcode) Called before explicit exit from the method using either return or throw.
void	visitCode() Starts the visit of the method's code, if any (i.e. non abstract method).
void	visitFieldInsn(int opcode, String owner, String name, String desc) Visits a field instruction.
void	visitInsn(int opcode) Visits a zero operand instruction.
void	visitIntInsn(int opcode, int operand) Visits an instruction with a single int operand.
void	visitJumpInsn(int opcode, Label label) Visits a jump instruction.
void	visitLabel(Label label) Visits a label.
void	visitLdcInsn(Object cst) Visits a LDC instruction.
void	visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) Visits a LOOKUPSWITCH instruction.
void	visitMethodInsn(int opcode, String owner, String name, String desc) Visits a method instruction.
void	visitMultiANewArrayInsn(String desc, int dims) Visits a MULTIANEWARRAY instruction.
void	visitTableSwitchInsn(int min, int max, Label dflt, Label[] labels) Visits a TABLESWITCH instruction.
void	visitTypeInsn(int opcode, String type) Visits a type instruction.
void	visitVarInsn(int opcode, int var) Visits a local variable instruction.

从类 org.objectweb.asm.commons.GeneratorAdapter 继承的方法

arrayLength, arrayLoad, arrayStore, box, cast, catchException, checkCast, dup, dup2, dup2X1, dup2X2, dupX1, dupX2, endMethod, getField, getLocalType, getStatic, goTo, ifCmp, ifICmp, ifNonNull, ifNull, ifZCmp, iinc, instanceOf, invokeConstructor, invokeInterface, invokeStatic, invokeVirtual, loadArg, loadArgArray, loadArgs, loadArgs, loadLocal, loadLocal, loadThis, mark, mark, math, monitorEnter, monitorExit, newArray, newInstance, newLabel, not, pop, pop2, push, push, push, push, push, push, push, putField, putStatic, ret, returnValue, setLocalType, storeArg, storeLocal, storeLocal, swap, swap, tableSwitch, tableSwitch, throwException, throwException, unbox

从类 org.objectweb.asm.commons.LocalVariablesSorter 继承的方法

newLocal, newLocalMapping, visitFrame, visitIincInsn, visitLocalVariable, visitMaxs

从类 org.objectweb.asm.MethodAdapter 继承的方法

visitAnnotation, visitAnnotationDefault, visitAttribute, visitEnd, visitLineNumber, visitParameterAnnotation, visitTryCatchBlock

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细信息

methodAccess

protected int methodAccess

methodDesc

protected String methodDesc

构造方法详细信息

AdviceAdapter

protected AdviceAdapter(MethodVisitor mv,
                        int access,
                        String name,
                        String desc)

Creates a new AdviceAdapter.

参数：

mv - the method visitor to which this adapter delegates calls.

access - the method's access flags (see Opcodes).

name - the method's name.

desc - the method's descriptor (see Type).

方法详细信息

visitCode

public void visitCode()

从接口 MethodVisitor 复制的描述

Starts the visit of the method's code, if any (i.e. non abstract method).

指定者：

接口 MethodVisitor 中的 visitCode

覆盖：

类 MethodAdapter 中的 visitCode

visitLabel

public void visitLabel(Label label)

从接口 MethodVisitor 复制的描述

Visits a label. A label designates the instruction that will be visited just after it.

指定者：

接口 MethodVisitor 中的 visitLabel

覆盖：

类 MethodAdapter 中的 visitLabel

参数：

label - a Label object.

visitInsn

public void visitInsn(int opcode)

从接口 MethodVisitor 复制的描述

Visits a zero operand instruction.

指定者：

接口 MethodVisitor 中的 visitInsn

覆盖：

类 MethodAdapter 中的 visitInsn

参数：

opcode - the opcode of the instruction to be visited. This opcode is either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)

从接口 MethodVisitor 复制的描述

Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.

指定者：

接口 MethodVisitor 中的 visitVarInsn

覆盖：

类 LocalVariablesSorter 中的 visitVarInsn

参数：

opcode - the opcode of the local variable instruction to be visited. This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.

var - the operand of the instruction to be visited. This operand is the index of a local variable.

visitFieldInsn

public void visitFieldInsn(int opcode,
                           String owner,
                           String name,
                           String desc)

从接口 MethodVisitor 复制的描述

Visits a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object.

指定者：

接口 MethodVisitor 中的 visitFieldInsn

覆盖：

类 MethodAdapter 中的 visitFieldInsn

参数：

opcode - the opcode of the type instruction to be visited. This opcode is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.

owner - the internal name of the field's owner class (see getInternalName).

name - the field's name.

desc - the field's descriptor (see Type).

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)

从接口 MethodVisitor 复制的描述

Visits an instruction with a single int operand.

指定者：

接口 MethodVisitor 中的 visitIntInsn

覆盖：

类 MethodAdapter 中的 visitIntInsn

参数：

opcode - the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH or NEWARRAY.

operand - the operand of the instruction to be visited.
When opcode is BIPUSH, operand value should be between Byte.MIN_VALUE and Byte.MAX_VALUE.
When opcode is SIPUSH, operand value should be between Short.MIN_VALUE and Short.MAX_VALUE.
When opcode is NEWARRAY, operand value should be one of Opcodes.T_BOOLEAN, Opcodes.T_CHAR, Opcodes.T_FLOAT, Opcodes.T_DOUBLE, Opcodes.T_BYTE, Opcodes.T_SHORT, Opcodes.T_INT or Opcodes.T_LONG.

visitLdcInsn

public void visitLdcInsn(Object cst)

从接口 MethodVisitor 复制的描述

Visits a LDC instruction.

指定者：

接口 MethodVisitor 中的 visitLdcInsn

覆盖：

类 MethodAdapter 中的 visitLdcInsn

参数：

cst - the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double a String (or a Type for .class constants, for classes whose version is 49.0 or more).

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(String desc,
                                    int dims)

从接口 MethodVisitor 复制的描述

Visits a MULTIANEWARRAY instruction.

指定者：

接口 MethodVisitor 中的 visitMultiANewArrayInsn

覆盖：

类 MethodAdapter 中的 visitMultiANewArrayInsn

参数：

desc - an array type descriptor (see Type).

dims - number of dimensions of the array to allocate.

visitTypeInsn

public void visitTypeInsn(int opcode,
                          String type)

从接口 MethodVisitor 复制的描述

Visits a type instruction. A type instruction is an instruction that takes the internal name of a class as parameter.

指定者：

接口 MethodVisitor 中的 visitTypeInsn

覆盖：

类 MethodAdapter 中的 visitTypeInsn

参数：

opcode - the opcode of the type instruction to be visited. This opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.

type - the operand of the instruction to be visited. This operand must be the internal name of an object or array class (see getInternalName).

visitMethodInsn

public void visitMethodInsn(int opcode,
                            String owner,
                            String name,
                            String desc)

从接口 MethodVisitor 复制的描述

Visits a method instruction. A method instruction is an instruction that invokes a method.

指定者：

接口 MethodVisitor 中的 visitMethodInsn

覆盖：

类 MethodAdapter 中的 visitMethodInsn

参数：

opcode - the opcode of the type instruction to be visited. This opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.

owner - the internal name of the method's owner class (see getInternalName).

name - the method's name.

desc - the method's descriptor (see Type).

visitJumpInsn

public void visitJumpInsn(int opcode,
                          Label label)

从接口 MethodVisitor 复制的描述

Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.

指定者：

接口 MethodVisitor 中的 visitJumpInsn

覆盖：

类 MethodAdapter 中的 visitJumpInsn

参数：

opcode - the opcode of the type instruction to be visited. This opcode is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.

label - the operand of the instruction to be visited. This operand is a label that designates the instruction to which the jump instruction may jump.

visitLookupSwitchInsn

public void visitLookupSwitchInsn(Label dflt,
                                  int[] keys,
                                  Label[] labels)

从接口 MethodVisitor 复制的描述

Visits a LOOKUPSWITCH instruction.

指定者：

接口 MethodVisitor 中的 visitLookupSwitchInsn

覆盖：

类 MethodAdapter 中的 visitLookupSwitchInsn

参数：

dflt - beginning of the default handler block.

keys - the values of the keys.

labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the keys[i] key.

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 Label dflt,
                                 Label[] labels)

从接口 MethodVisitor 复制的描述

Visits a TABLESWITCH instruction.

指定者：

接口 MethodVisitor 中的 visitTableSwitchInsn

覆盖：

类 MethodAdapter 中的 visitTableSwitchInsn

参数：

min - the minimum key value.

max - the maximum key value.

dflt - beginning of the default handler block.

labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the min + i key.

onMethodEnter

protected void onMethodEnter()

Called at the beginning of the method or after super class class call in the constructor.

Custom code can use or change all the local variables, but should not change state of the stack.

onMethodExit

protected void onMethodExit(int opcode)

Called before explicit exit from the method using either return or throw. Top element on the stack contains the return value or exception instance. For example:

   public void onMethodExit(int opcode) {
     if(opcode==RETURN) {
         visitInsn(ACONST_NULL);
     } else if(opcode==ARETURN || opcode==ATHROW) {
         dup();
     } else {
         if(opcode==LRETURN || opcode==DRETURN) {
             dup2();
         } else {
             dup();
         }
         box(Type.getReturnType(this.methodDesc));
     }
     visitIntInsn(SIPUSH, opcode);
     visitMethodInsn(INVOKESTATIC, owner, "onExit", "(Ljava/lang/Object;I)V");
   }

   // an actual call back method
   public static void onExit(int opcode, Object param) {
     ...
 

Custom code can use or change all the local variables, but should not change state of the stack.

参数：

opcode - one of the RETURN, IRETURN, FRETURN, ARETURN, LRETURN, DRETURN or ATHROW