org.objectweb.asm.commons

类 AdviceAdapter

java.lang.Object

org.objectweb.asm.MethodVisitor

org.objectweb.asm.commons.LocalVariablesSorter

org.objectweb.asm.commons.GeneratorAdapter

org.objectweb.asm.commons.AdviceAdapter

所有已实现的接口:

Opcodes

public abstract class AdviceAdapter
extends GeneratorAdapter
implements Opcodes

A MethodVisitor 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

字段概要

字段

限定符和类型	字段和说明
protected int	methodAccess
protected java.lang.String	methodDesc

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

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

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

firstLocal, nextLocal

从类继承的字段 org.objectweb.asm.MethodVisitor

api, mv

从接口继承的字段 org.objectweb.asm.Opcodes

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, ASM4, 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, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, 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, INVOKEDYNAMIC, 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, V1_7, V1_8

构造器概要

构造器

限定符	构造器和说明
protected	AdviceAdapter(int api, MethodVisitor mv, int access, java.lang.String name, java.lang.String desc) Creates a new AdviceAdapter.

方法概要

限定符和类型	方法和说明
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, java.lang.String owner, java.lang.String name, java.lang.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	visitInvokeDynamicInsn(java.lang.String name, java.lang.String desc, Handle bsm, java.lang.Object... bsmArgs) Visits an invokedynamic instruction.
void	visitJumpInsn(int opcode, Label label) Visits a jump instruction.
void	visitLabel(Label label) Visits a label.
void	visitLdcInsn(java.lang.Object cst) Visits a LDC instruction.
void	visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) Visits a LOOKUPSWITCH instruction.
void	visitMethodInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc) Visits a method instruction.
void	visitMultiANewArrayInsn(java.lang.String desc, int dims) Visits a MULTIANEWARRAY instruction.
void	visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) Visits a TABLESWITCH instruction.
void	visitTryCatchBlock(Label start, Label end, Label handler, java.lang.String type) Visits a try catch block.
void	visitTypeInsn(int opcode, java.lang.String type) Visits a type instruction.
void	visitVarInsn(int opcode, int var) Visits a local variable instruction.

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

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, invokeDynamic, 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, push, putField, putStatic, ret, returnValue, setLocalType, storeArg, storeLocal, storeLocal, swap, swap, tableSwitch, tableSwitch, throwException, throwException, unbox, valueOf

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

newLocal, newLocalMapping, updateNewLocals, visitFrame, visitIincInsn, visitLocalVariable, visitMaxs

从类继承的方法 org.objectweb.asm.MethodVisitor

visitAnnotation, visitAnnotationDefault, visitAttribute, visitEnd, visitLineNumber, visitParameterAnnotation

从类继承的方法 java.lang.Object

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

字段详细资料

methodAccess

protected int methodAccess

methodDesc

protected java.lang.String methodDesc

构造器详细资料

AdviceAdapter

protected AdviceAdapter(int api,
                        MethodVisitor mv,
                        int access,
                        java.lang.String name,
                        java.lang.String desc)

Creates a new AdviceAdapter.

参数:

api - the ASM API version implemented by this visitor. Must be one of Opcodes.ASM4.

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).

方法详细资料

visitCode

public void visitCode()

从类复制的说明: MethodVisitor

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

覆盖:

visitCode 在类中 MethodVisitor

visitLabel

public void visitLabel(Label label)

从类复制的说明: MethodVisitor

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

覆盖:

visitLabel 在类中 MethodVisitor

参数:

label - a Label object.

visitInsn

public void visitInsn(int opcode)

从类复制的说明: MethodVisitor

Visits a zero operand instruction.

覆盖:

visitInsn 在类中 MethodVisitor

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)

从类复制的说明: MethodVisitor

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

覆盖:

visitVarInsn 在类中 LocalVariablesSorter

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,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String desc)

从类复制的说明: MethodVisitor

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

覆盖:

visitFieldInsn 在类中 MethodVisitor

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)

从类复制的说明: MethodVisitor

Visits an instruction with a single int operand.

覆盖:

visitIntInsn 在类中 MethodVisitor

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(java.lang.Object cst)

从类复制的说明: MethodVisitor

Visits a LDC instruction. Note that new constant types may be added in future versions of the Java Virtual Machine. To easily detect new constant types, implementations of this method should check for unexpected constant types, like this:

 if (cst instanceof Integer) {
     // ...
 } else if (cst instanceof Float) {
     // ...
 } else if (cst instanceof Long) {
     // ...
 } else if (cst instanceof Double) {
     // ...
 } else if (cst instanceof String) {
     // ...
 } else if (cst instanceof Type) {
     int sort = ((Type) cst).getSort();
     if (sort == Type.OBJECT) {
         // ...
     } else if (sort == Type.ARRAY) {
         // ...
     } else if (sort == Type.METHOD) {
         // ...
     } else {
         // throw an exception
     }
 } else if (cst instanceof Handle) {
     // ...
 } else {
     // throw an exception
 }
 

覆盖:

visitLdcInsn 在类中 MethodVisitor

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, a Type of OBJECT or ARRAY sort for .class constants, for classes whose version is 49.0, a Type of METHOD sort or a Handle for MethodType and MethodHandle constants, for classes whose version is 51.0.

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(java.lang.String desc,
                                    int dims)

从类复制的说明: MethodVisitor

Visits a MULTIANEWARRAY instruction.

覆盖:

visitMultiANewArrayInsn 在类中 MethodVisitor

参数:

desc - an array type descriptor (see Type).

dims - number of dimensions of the array to allocate.

visitTypeInsn

public void visitTypeInsn(int opcode,
                          java.lang.String type)

从类复制的说明: MethodVisitor

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

覆盖:

visitTypeInsn 在类中 MethodVisitor

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,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String desc)

从类复制的说明: MethodVisitor

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

覆盖:

visitMethodInsn 在类中 MethodVisitor

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).

visitInvokeDynamicInsn

public void visitInvokeDynamicInsn(java.lang.String name,
                                   java.lang.String desc,
                                   Handle bsm,
                                   java.lang.Object... bsmArgs)

从类复制的说明: MethodVisitor

Visits an invokedynamic instruction.

覆盖:

visitInvokeDynamicInsn 在类中 MethodVisitor

参数:

name - the method's name.

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

bsm - the bootstrap method.

bsmArgs - the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type or Handle value. This method is allowed to modify the content of the array so a caller should expect that this array may change.

visitJumpInsn

public void visitJumpInsn(int opcode,
                          Label label)

从类复制的说明: MethodVisitor

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

覆盖:

visitJumpInsn 在类中 MethodVisitor

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)

从类复制的说明: MethodVisitor

Visits a LOOKUPSWITCH instruction.

覆盖:

visitLookupSwitchInsn 在类中 MethodVisitor

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)

从类复制的说明: MethodVisitor

Visits a TABLESWITCH instruction.

覆盖:

visitTableSwitchInsn 在类中 MethodVisitor

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.

visitTryCatchBlock

public void visitTryCatchBlock(Label start,
                               Label end,
                               Label handler,
                               java.lang.String type)

从类复制的说明: MethodVisitor

Visits a try catch block.

覆盖:

visitTryCatchBlock 在类中 MethodVisitor

参数:

start - beginning of the exception handler's scope (inclusive).

end - end of the exception handler's scope (exclusive).

handler - beginning of the exception handler's code.

type - internal name of the type of exceptions handled by the handler, or null to catch any exceptions (for "finally" blocks).

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(Object param, int opcode) {
     ...
 

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