org.objectweb.asm.commons
类 AnalyzerAdapter

java.lang.Object
  org.objectweb.asm.MethodAdapter
      org.objectweb.asm.commons.AnalyzerAdapter

所有已实现的接口：

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).

作者：

Eric Bruneton

字段摘要

List	locals List of the local variable slots for current execution frame.
List	stack List of the operand stack slots for current execution frame.

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

mv

构造方法摘要

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

方法摘要

void	visitFieldInsn(int opcode, String owner, String name, String desc) Visits a field instruction.
void	visitFrame(int type, int nLocal, Object[] local, int nStack, 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	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	visitMaxs(int maxStack, int maxLocals) Visits the maximum stack size and the maximum number of local variables of the method.
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.MethodAdapter 继承的方法

visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitLineNumber, visitLocalVariable, 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

locals

public 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), 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 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), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value). This field is null for unreacheable instructions.

构造方法详细信息

AnalyzerAdapter

public AnalyzerAdapter(String owner,
                       int access,
                       String name,
                       String desc,
                       MethodVisitor mv)

Creates a new AnalyzerAdapter.

参数：

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.

方法详细信息

visitFrame

public void visitFrame(int type,
                       int nLocal,
                       Object[] local,
                       int nStack,
                       Object[] stack)

从接口 MethodVisitor 复制的描述

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.

指定者：

接口 MethodVisitor 中的 visitFrame

覆盖：

类 MethodAdapter 中的 visitFrame

参数：

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), 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.

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.

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.

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 MethodAdapter 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.

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).

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).

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.

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.

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).

visitIincInsn

public void visitIincInsn(int var,
                          int increment)

从接口 MethodVisitor 复制的描述

Visits an IINC instruction.

指定者：

接口 MethodVisitor 中的 visitIincInsn

覆盖：

类 MethodAdapter 中的 visitIincInsn

参数：

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)

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.

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.

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.

visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)

从接口 MethodVisitor 复制的描述

Visits the maximum stack size and the maximum number of local variables of the method.

指定者：

接口 MethodVisitor 中的 visitMaxs

覆盖：

类 MethodAdapter 中的 visitMaxs

参数：

maxStack - maximum stack size of the method.

maxLocals - maximum number of local variables for the method.