AnalyzerAdapter

java.lang.Object
- org.eclipse.persistence.internal.libraries.asm.MethodVisitor
- - org.eclipse.persistence.internal.libraries.asm.commons.AnalyzerAdapter

```
public class AnalyzerAdapter
extends MethodVisitor
```
A MethodVisitor that keeps track of stack map frame changes between visitFrame(int, int, Object[], int, Object[]) calls. This adapter must be used with the ClassReader.EXPAND_FRAMES option. Each visitX 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 visitX methods (this requires a reference to the AnalyzerAdapter that is before it in the chain). If this adapter is used with a class that does not contain stack map table attributes (i.e., pre Java 6 classes) then this adapter may not be able to compute the stack map frame for each instruction. In this case no exception is thrown but the locals and stack fields will be null for these instructions.

Author:

Eric Bruneton

Field Summary

Fields
Modifier and Type	Field and Description
`java.util.List<java.lang.Object>`	`locals` The local variable slots for the current execution frame.
`java.util.List<java.lang.Object>`	`stack` The operand stack slots for the current execution frame.
`java.util.Map<java.lang.Object,java.lang.Object>`	`uninitializedTypes` The uninitialized types in the current execution frame.

Fields inherited from class org.eclipse.persistence.internal.libraries.asm.MethodVisitor
api, mv

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`AnalyzerAdapter(int api, java.lang.String owner, int access, java.lang.String name, java.lang.String descriptor, MethodVisitor methodVisitor)` Constructs a new `AnalyzerAdapter`.
	`AnalyzerAdapter(java.lang.String owner, int access, java.lang.String name, java.lang.String descriptor, MethodVisitor methodVisitor)` Constructs a new `AnalyzerAdapter`.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String descriptor)` Visits a field instruction.
`void`	`visitFrame(int type, int numLocal, java.lang.Object[] local, int numStack, java.lang.Object[] stack)` Visits the current state of the local variables and operand stack elements.
`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`	`visitInvokeDynamicInsn(java.lang.String name, java.lang.String descriptor, Handle bootstrapMethodHandle, java.lang.Object... bootstrapMethodArguments)` 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 value)` Visits a LDC instruction.
`void`	`visitLocalVariable(java.lang.String name, java.lang.String descriptor, java.lang.String signature, Label start, Label end, int index)` Visits a local variable declaration.
`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 opcodeAndSource, java.lang.String owner, java.lang.String name, java.lang.String descriptor, boolean isInterface)` Visits a method instruction.
`void`	`visitMultiANewArrayInsn(java.lang.String descriptor, int numDimensions)` 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 type)` Visits a type instruction.
`void`	`visitVarInsn(int opcode, int var)` Visits a local variable instruction.

Methods inherited from class org.eclipse.persistence.internal.libraries.asm.MethodVisitor
visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitInsnAnnotation, visitLineNumber, visitLocalVariableAnnotation, visitMethodInsn, visitParameter, visitParameterAnnotation, visitTryCatchAnnotation, visitTryCatchBlock, visitTypeAnnotation

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<java.lang.Object> locals
```
    The local variable slots for the 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 two elements, the second one being TOP). Reference types are represented by String objects (representing internal names), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value). This field is null for unreachable instructions.
  - stack
```
public java.util.List<java.lang.Object> stack
```
    The operand stack slots for the 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 two elements, the second one being TOP). Reference types are represented by String objects (representing internal names), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value). This field is null for unreachable instructions.
  - uninitializedTypes
```
public java.util.Map<java.lang.Object,java.lang.Object> uninitializedTypes
```
    The 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.
- Constructor Detail
  - AnalyzerAdapter
```
public AnalyzerAdapter(java.lang.String owner,
                       int access,
                       java.lang.String name,
                       java.lang.String descriptor,
                       MethodVisitor methodVisitor)
```
    Constructs a new AnalyzerAdapter. Subclasses must not use this constructor. Instead, they must use the AnalyzerAdapter(int, String, int, String, String, MethodVisitor) version.
    
    Parameters:
    
    owner - the owner's class name.
    
    access - the method's access flags (see Opcodes).
    
    name - the method's name.
    
    descriptor - the method's descriptor (see Type).
    
    methodVisitor - the method visitor to which this adapter delegates calls. May be null.
    
    Throws:
    
    java.lang.IllegalStateException - If a subclass calls this constructor.
  - AnalyzerAdapter
```
protected AnalyzerAdapter(int api,
                          java.lang.String owner,
                          int access,
                          java.lang.String name,
                          java.lang.String descriptor,
                          MethodVisitor methodVisitor)
```
    Constructs a new AnalyzerAdapter.
    
    Parameters:
    
    api - the ASM API version implemented by this visitor. Must be one of Opcodes.ASM4, Opcodes.ASM5, Opcodes.ASM6, Opcodes.ASM7, Opcodes.ASM8 or Opcodes.ASM9.
    
    owner - the owner's class name.
    
    access - the method's access flags (see Opcodes).
    
    name - the method's name.
    
    descriptor - the method's descriptor (see Type).
    
    methodVisitor - the method visitor to which this adapter delegates calls. May be null.
- Method Detail
  - visitFrame
```
public void visitFrame(int type,
                       int numLocal,
                       java.lang.Object[] local,
                       int numStack,
                       java.lang.Object[] stack)
```
    Description copied from class: 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 unconditional 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 Opcodes.V1_6.
    
    The frames of a method must be given either in expanded form, or in compressed form (all frames must use the same format, i.e. you must not mix expanded and compressed frames within a single method):
    - In expanded form, all frames must have the F_NEW type.
    - In compressed form, frames are basically "deltas" from the state of the previous frame:
      
      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 ( numStack 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 (numLocal 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 (numLocal is 1, 2 or 3).
      Opcodes.F_FULL representing complete frame data.
    In both cases the first frame, corresponding to the method's parameters and access flags, is implicit and must not be visited. Also, it is illegal to visit two or more frames for the same code location (i.e., at least one instruction must be visited between two calls to visitFrame).
    Overrides:
    
    visitFrame in class MethodVisitor
    
    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.
    
    numLocal - 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), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value).
    
    numStack - 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.
  - visitInsn
```
public void visitInsn(int opcode)
```
    Description copied from class: MethodVisitor
    
    Visits a zero operand instruction.
    
    Overrides:
    
    visitInsn in class MethodVisitor
    
    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 class: MethodVisitor
    
    Visits an instruction with a single int operand.
    
    Overrides:
    
    visitIntInsn in class MethodVisitor
    
    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 class: MethodVisitor
    
    Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.
    
    Overrides:
    
    visitVarInsn in class MethodVisitor
    
    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 type)
```
    Description copied from class: MethodVisitor
    
    Visits a type instruction. A type instruction is an instruction that takes the internal name of a class as parameter.
    
    Overrides:
    
    visitTypeInsn in class MethodVisitor
    
    Parameters:
    
    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 Type.getInternalName()).
  - visitFieldInsn
```
public void visitFieldInsn(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String descriptor)
```
    Description copied from class: MethodVisitor
    
    Visits a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object.
    
    Overrides:
    
    visitFieldInsn in class MethodVisitor
    
    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 Type.getInternalName()).
    
    name - the field's name.
    
    descriptor - the field's descriptor (see Type).
  - visitMethodInsn
```
public void visitMethodInsn(int opcodeAndSource,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String descriptor,
                            boolean isInterface)
```
    Description copied from class: MethodVisitor
    
    Visits a method instruction. A method instruction is an instruction that invokes a method.
    
    Overrides:
    
    visitMethodInsn in class MethodVisitor
    
    Parameters:
    
    opcodeAndSource - 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 Type.getInternalName()).
    
    name - the method's name.
    
    descriptor - the method's descriptor (see Type).
    
    isInterface - if the method's owner class is an interface.
  - visitInvokeDynamicInsn
```
public void visitInvokeDynamicInsn(java.lang.String name,
                                   java.lang.String descriptor,
                                   Handle bootstrapMethodHandle,
                                   java.lang.Object... bootstrapMethodArguments)
```
    Description copied from class: MethodVisitor
    
    Visits an invokedynamic instruction.
    
    Overrides:
    
    visitInvokeDynamicInsn in class MethodVisitor
    
    Parameters:
    
    name - the method's name.
    
    descriptor - the method's descriptor (see Type).
    
    bootstrapMethodHandle - the bootstrap method.
    
    bootstrapMethodArguments - the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type, Handle or ConstantDynamic 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)
```
    Description copied from class: MethodVisitor
    
    Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.
    
    Overrides:
    
    visitJumpInsn in class MethodVisitor
    
    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 class: MethodVisitor
    
    Visits a label. A label designates the instruction that will be visited just after it.
    
    Overrides:
    
    visitLabel in class MethodVisitor
    
    Parameters:
    
    label - a Label object.
  - visitLdcInsn
```
public void visitLdcInsn(java.lang.Object value)
```
    Description copied from class: 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 if (cst instanceof ConstantDynamic) {
     // ...
 } else {
     // throw an exception
 }
 
```
    Overrides:
    
    visitLdcInsn in class MethodVisitor
    
    Parameters:
    
    value - 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, a Type of METHOD sort for MethodType, a Handle for MethodHandle constants, for classes whose version is 51 or a ConstantDynamic for a constant dynamic for classes whose version is 55.
  - visitIincInsn
```
public void visitIincInsn(int var,
                          int increment)
```
    Description copied from class: MethodVisitor
    
    Visits an IINC instruction.
    
    Overrides:
    
    visitIincInsn in class MethodVisitor
    
    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 class: MethodVisitor
    
    Visits a TABLESWITCH instruction.
    
    Overrides:
    
    visitTableSwitchInsn in class MethodVisitor
    
    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 class: MethodVisitor
    
    Visits a LOOKUPSWITCH instruction.
    
    Overrides:
    
    visitLookupSwitchInsn in class MethodVisitor
    
    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 descriptor,
                                    int numDimensions)
```
    Description copied from class: MethodVisitor
    
    Visits a MULTIANEWARRAY instruction.
    
    Overrides:
    
    visitMultiANewArrayInsn in class MethodVisitor
    
    Parameters:
    
    descriptor - an array type descriptor (see Type).
    
    numDimensions - the number of dimensions of the array to allocate.
  - visitLocalVariable
```
public void visitLocalVariable(java.lang.String name,
                               java.lang.String descriptor,
                               java.lang.String signature,
                               Label start,
                               Label end,
                               int index)
```
    Description copied from class: MethodVisitor
    
    Visits a local variable declaration.
    
    Overrides:
    
    visitLocalVariable in class MethodVisitor
    
    Parameters:
    
    name - the name of a local variable.
    
    descriptor - the type descriptor of this local variable.
    
    signature - the type signature of this local variable. May be null if the local variable type does not use generic types.
    
    start - the first instruction corresponding to the scope of this local variable (inclusive).
    
    end - the last instruction corresponding to the scope of this local variable (exclusive).
    
    index - the local variable's index.
  - visitMaxs
```
public void visitMaxs(int maxStack,
                      int maxLocals)
```
    Description copied from class: MethodVisitor
    
    Visits the maximum stack size and the maximum number of local variables of the method.
    
    Overrides:
    
    visitMaxs in class MethodVisitor
    
    Parameters:
    
    maxStack - maximum stack size of the method.
    
    maxLocals - maximum number of local variables for the method.

Class AnalyzerAdapter

Field Summary

Fields inherited from class org.eclipse.persistence.internal.libraries.asm.MethodVisitor

Constructor Summary

Method Summary

Methods inherited from class org.eclipse.persistence.internal.libraries.asm.MethodVisitor

Methods inherited from class java.lang.Object

Field Detail

locals

stack

uninitializedTypes

Constructor Detail

AnalyzerAdapter

AnalyzerAdapter

Method Detail

visitFrame

visitInsn

visitIntInsn

visitVarInsn

visitTypeInsn

visitFieldInsn

visitMethodInsn

visitInvokeDynamicInsn

visitJumpInsn

visitLabel

visitLdcInsn

visitIincInsn

visitTableSwitchInsn

visitLookupSwitchInsn

visitMultiANewArrayInsn

visitLocalVariable

visitMaxs