AdviceAdapter

java.lang.Object
- clojure.asm.MethodAdapter
- - clojure.asm.commons.LocalVariablesSorter
  - - clojure.asm.commons.GeneratorAdapter
    - - clojure.asm.commons.AdviceAdapter

All Implemented Interfaces:

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
Author:

Eugene Kuleshov, Eric Bruneton

Field Summary

Fields
Modifier and Type Field and Description

protected int methodAccess

protected java.lang.String methodDesc
- Fields inherited from class clojure.asm.commons.GeneratorAdapter
  ADD, AND, DIV, EQ, GE, GT, LE, LT, MUL, NE, NEG, OR, REM, SHL, SHR, SUB, USHR, XOR
- Fields inherited from class clojure.asm.commons.LocalVariablesSorter
  firstLocal, nextLocal
- Fields inherited from class clojure.asm.MethodAdapter
  mv
- Fields inherited from interface clojure.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, 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

Fields
Modifier and Type	Field and Description
`protected int`	`methodAccess`
`protected java.lang.String`	`methodDesc`

Constructor Summary

Constructors
Constructor and Description
`AdviceAdapter(MethodVisitor mv, int access, java.lang.String name, java.lang.String desc)` Creates a new `AdviceAdapter`.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`protected abstract void`	`onMethodEnter()` Called at the beginning of the method or after super class class call in the constructor.
`protected abstract 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`	`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`	`visitTypeInsn(int opcode, java.lang.String name)` Visits a type instruction.
`void`	`visitVarInsn(int opcode, int var)` Visits a local variable instruction.

Methods inherited from class clojure.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, 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

Methods inherited from class clojure.asm.commons.LocalVariablesSorter
newLocal, visitFrame, visitIincInsn, visitLocalVariable, visitMaxs

Methods inherited from class clojure.asm.MethodAdapter
visitAnnotation, visitAnnotationDefault, visitAttribute, visitEnd, visitLineNumber, visitParameterAnnotation, visitTryCatchBlock

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - methodAccess
```
protected int methodAccess
```
  - methodDesc
```
protected java.lang.String methodDesc
```
- Constructor Detail
  - AdviceAdapter
```
public AdviceAdapter(MethodVisitor mv,
                     int access,
                     java.lang.String name,
                     java.lang.String desc)
```
    Creates a new AdviceAdapter.
    
    Parameters:
    
    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).
- Method Detail
  - visitCode
```
public void visitCode()
```
    Description copied from interface: MethodVisitor
    
    Starts the visit of the method's code, if any (i.e. non abstract method).
    
    Specified by:
    
    visitCode in interface MethodVisitor
    
    Overrides:
    
    visitCode in class MethodAdapter
  - visitLabel
```
public void visitLabel(Label label)
```
    Description copied from interface: MethodVisitor
    
    Visits a label. A label designates the instruction that will be visited just after it.
    
    Specified by:
    
    visitLabel in interface MethodVisitor
    
    Overrides:
    
    visitLabel in class MethodAdapter
    
    Parameters:
    
    label - a Label object.
  - visitInsn
```
public void visitInsn(int opcode)
```
    Description copied from interface: MethodVisitor
    
    Visits a zero operand instruction.
    
    Specified by:
    
    visitInsn in interface MethodVisitor
    
    Overrides:
    
    visitInsn in class MethodAdapter
    
    Parameters:
    
    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)
```
    Description copied from interface: MethodVisitor
    
    Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.
    
    Specified by:
    
    visitVarInsn in interface MethodVisitor
    
    Overrides:
    
    visitVarInsn in class LocalVariablesSorter
    
    Parameters:
    
    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)
```
    Description copied from interface: MethodVisitor
    
    Visits a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object.
    
    Specified by:
    
    visitFieldInsn in interface MethodVisitor
    
    Overrides:
    
    visitFieldInsn in class MethodAdapter
    
    Parameters:
    
    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)
```
    Description copied from interface: MethodVisitor
    
    Visits an instruction with a single int operand.
    
    Specified by:
    
    visitIntInsn in interface MethodVisitor
    
    Overrides:
    
    visitIntInsn in class MethodAdapter
    
    Parameters:
    
    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)
```
    Description copied from interface: MethodVisitor
    
    Visits a LDC instruction.
    
    Specified by:
    
    visitLdcInsn in interface MethodVisitor
    
    Overrides:
    
    visitLdcInsn in class MethodAdapter
    
    Parameters:
    
    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(java.lang.String desc,
                                    int dims)
```
    Description copied from interface: MethodVisitor
    
    Visits a MULTIANEWARRAY instruction.
    
    Specified by:
    
    visitMultiANewArrayInsn in interface MethodVisitor
    
    Overrides:
    
    visitMultiANewArrayInsn in class MethodAdapter
    
    Parameters:
    
    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 name)
```
    Description copied from interface: MethodVisitor
    
    Visits a type instruction. A type instruction is an instruction that takes a type descriptor as parameter.
    
    Specified by:
    
    visitTypeInsn in interface MethodVisitor
    
    Overrides:
    
    visitTypeInsn in class MethodAdapter
    
    Parameters:
    
    opcode - the opcode of the type instruction to be visited. This opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
    
    name - the operand of the instruction to be visited. This operand is must be a fully qualified class name in internal form, or the type descriptor of an array type (see Type).
  - visitMethodInsn
```
public void visitMethodInsn(int opcode,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String desc)
```
    Description copied from interface: MethodVisitor
    
    Visits a method instruction. A method instruction is an instruction that invokes a method.
    
    Specified by:
    
    visitMethodInsn in interface MethodVisitor
    
    Overrides:
    
    visitMethodInsn in class MethodAdapter
    
    Parameters:
    
    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)
```
    Description copied from interface: MethodVisitor
    
    Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.
    
    Specified by:
    
    visitJumpInsn in interface MethodVisitor
    
    Overrides:
    
    visitJumpInsn in class MethodAdapter
    
    Parameters:
    
    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)
```
    Description copied from interface: MethodVisitor
    
    Visits a LOOKUPSWITCH instruction.
    
    Specified by:
    
    visitLookupSwitchInsn in interface MethodVisitor
    
    Overrides:
    
    visitLookupSwitchInsn in class MethodAdapter
    
    Parameters:
    
    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)
```
    Description copied from interface: MethodVisitor
    
    Visits a TABLESWITCH instruction.
    
    Specified by:
    
    visitTableSwitchInsn in interface MethodVisitor
    
    Overrides:
    
    visitTableSwitchInsn in class MethodAdapter
    
    Parameters:
    
    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 abstract 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 abstract 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.
    Parameters:
    
    opcode - one of the RETURN, IRETURN, FRETURN, ARETURN, LRETURN, DRETURN or ATHROW

Class AdviceAdapter

Field Summary

Fields inherited from class clojure.asm.commons.GeneratorAdapter

Fields inherited from class clojure.asm.commons.LocalVariablesSorter

Fields inherited from class clojure.asm.MethodAdapter

Fields inherited from interface clojure.asm.Opcodes

Constructor Summary

Method Summary

Methods inherited from class clojure.asm.commons.GeneratorAdapter

Methods inherited from class clojure.asm.commons.LocalVariablesSorter

Methods inherited from class clojure.asm.MethodAdapter

Methods inherited from class java.lang.Object

Field Detail

methodAccess

methodDesc

Constructor Detail

AdviceAdapter

Method Detail

visitCode

visitLabel

visitInsn

visitVarInsn

visitFieldInsn

visitIntInsn

visitLdcInsn

visitMultiANewArrayInsn

visitTypeInsn

visitMethodInsn

visitJumpInsn

visitLookupSwitchInsn

visitTableSwitchInsn

onMethodEnter

onMethodExit