AnalyzerAdapter (Clojure 1.5.1 JVM API)

java.lang.Object
- clojure.asm.MethodAdapter
- - clojure.asm.commons.AnalyzerAdapter

All Implemented Interfaces:

MethodVisitor
```
public class AnalyzerAdapter
extends MethodAdapter
```
A MethodAdapter that keeps track of stack map frame changes between visitFrame calls. This adapter must be used with the ClassReader.EXPAND_FRAMES option. Each visitXXX instruction delegates to the next visitor in the chain, if any, and then simulates the effect of this instruction on the stack map frame, represented by locals and stack. The next visitor in the chain can get the state of the stack map frame before each instruction by reading the value of these fields in its visitXXX methods (this requires a reference to the AnalyzerAdapter that is before it in the chain).

Author:

Eric Bruneton

Field Summary

Fields
Modifier and Type	Field and Description
`private java.util.List`	`labels` The labels that designate the next instruction to be visited.
`java.util.List`	`locals` `List` of the local variable slots for current execution frame.
`private int`	`maxLocals` The maximum number of local variables of this method.
`private int`	`maxStack` The maximum stack size of this method.
`java.util.List`	`stack` `List` of the operand stack slots for current execution frame.
`private java.util.Map`	`uninitializedTypes` Information about uninitialized types in the current execution frame.

Fields inherited from class clojure.asm.MethodAdapter
mv

Constructor Summary

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

Method Summary

Methods
Modifier and Type	Method and Description
`private void`	`execute(int opcode, int iarg, java.lang.String sarg)`
`private java.lang.Object`	`get(int local)`
`private java.lang.Object`	`pop()`
`private void`	`pop(int n)`
`private void`	`pop(java.lang.String desc)`
`private void`	`push(java.lang.Object type)`
`private void`	`pushDesc(java.lang.String desc)`
`private void`	`set(int local, java.lang.Object type)`
`void`	`visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)` Visits a field instruction.
`void`	`visitFrame(int type, int nLocal, java.lang.Object[] local, int nStack, java.lang.Object[] stack)` Visits the current state of the local variables and operand stack elements.
`private void`	`visitFrameTypes(int n, java.lang.Object[] types, java.util.List result)`
`void`	`visitIincInsn(int var, int increment)` Visits an IINC 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`	`visitMaxs(int maxStack, int maxLocals)` Visits the maximum stack size and the maximum number of local variables of the method.
`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 desc)` Visits a type instruction.
`void`	`visitVarInsn(int opcode, int var)` Visits a local variable instruction.

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

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

- Field Detail
  - locals
```
public java.util.List locals
```
    List of the local variable slots for current execution frame. Primitive types are represented by Opcodes.TOP, Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG, Opcodes.DOUBLE,Opcodes.NULL or Opcodes.UNINITIALIZED_THIS (long and double are represented by a two elements, the second one being TOP). Reference types are represented by String objects (representing internal names, or type descriptors for array types), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value). This field is null for unreacheable instructions.
  - stack
```
public java.util.List stack
```
    List of the operand stack slots for current execution frame. Primitive types are represented by Opcodes.TOP, Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG, Opcodes.DOUBLE,Opcodes.NULL or Opcodes.UNINITIALIZED_THIS (long and double are represented by a two elements, the second one being TOP). Reference types are represented by String objects (representing internal names, or type descriptors for array types), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value). This field is null for unreacheable instructions.
  - labels
```
private java.util.List labels
```
    The labels that designate the next instruction to be visited. May be null.
  - uninitializedTypes
```
private java.util.Map uninitializedTypes
```
    Information about uninitialized types in the current execution frame. This map associates internal names to Label objects. Each label designates a NEW instruction that created the currently uninitialized types, and the associated internal name represents the NEW operand, i.e. the final, initialized type value.
  - maxStack
```
private int maxStack
```
    The maximum stack size of this method.
  - maxLocals
```
private int maxLocals
```
    The maximum number of local variables of this method.
- Constructor Detail
  - AnalyzerAdapter
```
public AnalyzerAdapter(java.lang.String owner,
               int access,
               java.lang.String name,
               java.lang.String desc,
               MethodVisitor mv)
```
    Creates a new AnalyzerAdapter.
    
    Parameters:
    owner - the owner's class name.
    access - the method's access flags (see Opcodes).
    name - the method's name.
    desc - the method's descriptor (see Type).
    mv - the method visitor to which this adapter delegates calls. May be null.
- Method Detail
  - visitFrame
```
public void visitFrame(int type,
              int nLocal,
              java.lang.Object[] local,
              int nStack,
              java.lang.Object[] stack)
```
    Description copied from interface: MethodVisitor
    Visits the current state of the local variables and operand stack elements. This method must(*) be called just before any instruction i that follows an unconditionnal branch instruction such as GOTO or THROW, that is the target of a jump instruction, or that starts an exception handler block. The visited types must describe the values of the local variables and of the operand stack elements just before i is executed.
    
    (*) this is mandatory only for classes whose version is greater than or equal to V1_6.
    
    Packed frames are basically "deltas" from the state of the previous frame (very first frame is implicitly defined by the method's parameters and access flags):
    - Opcodes.F_SAME representing frame with exactly the same locals as the previous frame and with the empty stack.
    - Opcodes.F_SAME1 representing frame with exactly the same locals as the previous frame and with single value on the stack (nStack is 1 and stack[0] contains value for the type of the stack item).
    - Opcodes.F_APPEND representing frame with current locals are the same as the locals in the previous frame, except that additional locals are defined (nLocal is 1, 2 or 3 and local elements contains values representing added types).
    - Opcodes.F_CHOP representing frame with current locals are the same as the locals in the previous frame, except that the last 1-3 locals are absent and with the empty stack (nLocals is 1, 2 or 3).
    - Opcodes.F_FULL representing complete frame data.
    Specified by:
    
    visitFrame in interface MethodVisitor
    
    Overrides:
    
    visitFrame in class MethodAdapter
    
    Parameters:
    type - the type of this stack map frame. Must be Opcodes.F_NEW for expanded frames, or Opcodes.F_FULL, Opcodes.F_APPEND, Opcodes.F_CHOP, Opcodes.F_SAME or Opcodes.F_APPEND, Opcodes.F_SAME1 for compressed frames.
    nLocal - the number of local variables in the visited frame.
    local - the local variable types in this frame. This array must not be modified. Primitive types are represented by Opcodes.TOP, Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG, Opcodes.DOUBLE,Opcodes.NULL or Opcodes.UNINITIALIZED_THIS (long and double are represented by a single element). Reference types are represented by String objects (representing internal names, or type descriptors for array types), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value).
    nStack - the number of operand stack elements in the visited frame.
    stack - the operand stack types in this frame. This array must not be modified. Its content has the same format as the "local" array.
  - visitFrameTypes
```
private void visitFrameTypes(int n,
                   java.lang.Object[] types,
                   java.util.List result)
```
  - 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.
  - 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.
  - 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 MethodAdapter
    
    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.
  - visitTypeInsn
```
public void visitTypeInsn(int opcode,
                 java.lang.String desc)
```
    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.
    desc - 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).
  - 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).
  - 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.
  - 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.
  - 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).
  - visitIincInsn
```
public void visitIincInsn(int var,
                 int increment)
```
    Description copied from interface: MethodVisitor
    
    Visits an IINC instruction.
    
    Specified by:
    
    visitIincInsn in interface MethodVisitor
    
    Overrides:
    
    visitIincInsn in class MethodAdapter
    
    Parameters:
    var - index of the local variable to be incremented.
    increment - amount to increment the local variable by.
  - 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.
  - 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.
  - 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.
  - visitMaxs
```
public void visitMaxs(int maxStack,
             int maxLocals)
```
    Description copied from interface: MethodVisitor
    
    Visits the maximum stack size and the maximum number of local variables of the method.
    
    Specified by:
    
    visitMaxs in interface MethodVisitor
    
    Overrides:
    
    visitMaxs in class MethodAdapter
    
    Parameters:
    maxStack - maximum stack size of the method.
    maxLocals - maximum number of local variables for the method.
  - get
```
private java.lang.Object get(int local)
```
  - set
```
private void set(int local,
       java.lang.Object type)
```
  - push
```
private void push(java.lang.Object type)
```
  - pushDesc
```
private void pushDesc(java.lang.String desc)
```
  - pop
```
private java.lang.Object pop()
```
  - pop
```
private void pop(int n)
```
  - pop
```
private void pop(java.lang.String desc)
```
  - execute
```
private void execute(int opcode,
           int iarg,
           java.lang.String sarg)
```

Class AnalyzerAdapter

Field Summary

Fields inherited from class clojure.asm.MethodAdapter

Constructor Summary

Method Summary

Methods inherited from class clojure.asm.MethodAdapter

Methods inherited from class java.lang.Object

Field Detail

locals

stack

labels

uninitializedTypes

maxStack

maxLocals

Constructor Detail

AnalyzerAdapter

Method Detail

visitFrame

visitFrameTypes

visitInsn

visitIntInsn

visitVarInsn

visitTypeInsn

visitFieldInsn

visitMethodInsn

visitJumpInsn

visitLabel

visitLdcInsn

visitIincInsn

visitTableSwitchInsn

visitLookupSwitchInsn

visitMultiANewArrayInsn

visitMaxs

get

set

push

pushDesc

pop

pop

pop

execute