org.objectweb.asm.commons

Class AnalyzerAdapter

java.lang.Object

org.objectweb.asm.MethodVisitor

org.objectweb.asm.commons.AnalyzerAdapter

public class AnalyzerAdapter
extends org.objectweb.asm.MethodVisitor

A MethodVisitor that keeps track of stack map frame changes between visitFrame 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.

Field Summary

Fields

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

Fields inherited from class org.objectweb.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 desc, org.objectweb.asm.MethodVisitor mv) Creates a new AnalyzerAdapter.
	AnalyzerAdapter(java.lang.String owner, int access, java.lang.String name, java.lang.String desc, org.objectweb.asm.MethodVisitor mv) Creates a new AnalyzerAdapter.

Method Summary

Modifier and Type	Method and Description
void	visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)
void	visitFrame(int type, int nLocal, java.lang.Object[] local, int nStack, java.lang.Object[] stack)
void	visitIincInsn(int var, int increment)
void	visitInsn(int opcode)
void	visitIntInsn(int opcode, int operand)
void	visitInvokeDynamicInsn(java.lang.String name, java.lang.String desc, org.objectweb.asm.Handle bsm, java.lang.Object... bsmArgs)
void	visitJumpInsn(int opcode, org.objectweb.asm.Label label)
void	visitLabel(org.objectweb.asm.Label label)
void	visitLdcInsn(java.lang.Object cst)
void	visitLookupSwitchInsn(org.objectweb.asm.Label dflt, int[] keys, org.objectweb.asm.Label[] labels)
void	visitMaxs(int maxStack, int maxLocals)
void	visitMethodInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)
void	visitMultiANewArrayInsn(java.lang.String desc, int dims)
void	visitTableSwitchInsn(int min, int max, org.objectweb.asm.Label dflt, org.objectweb.asm.Label... labels)
void	visitTypeInsn(int opcode, java.lang.String type)
void	visitVarInsn(int opcode, int var)

Methods inherited from class org.objectweb.asm.MethodVisitor

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

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 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

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 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

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.

Constructor Detail

AnalyzerAdapter

public AnalyzerAdapter(java.lang.String owner,
                       int access,
                       java.lang.String name,
                       java.lang.String desc,
                       org.objectweb.asm.MethodVisitor mv)

Creates 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.

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

mv - the method visitor to which this adapter delegates calls. May be null.

AnalyzerAdapter

protected AnalyzerAdapter(int api,
                          java.lang.String owner,
                          int access,
                          java.lang.String name,
                          java.lang.String desc,
                          org.objectweb.asm.MethodVisitor mv)

Creates a new AnalyzerAdapter.

Parameters:

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

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)

Overrides:

visitFrame in class org.objectweb.asm.MethodVisitor

visitInsn

public void visitInsn(int opcode)

Overrides:

visitInsn in class org.objectweb.asm.MethodVisitor

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)

Overrides:

visitIntInsn in class org.objectweb.asm.MethodVisitor

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)

Overrides:

visitVarInsn in class org.objectweb.asm.MethodVisitor

visitTypeInsn

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

Overrides:

visitTypeInsn in class org.objectweb.asm.MethodVisitor

visitFieldInsn

public void visitFieldInsn(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String desc)

Overrides:

visitFieldInsn in class org.objectweb.asm.MethodVisitor

visitMethodInsn

public void visitMethodInsn(int opcode,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String desc)

Overrides:

visitMethodInsn in class org.objectweb.asm.MethodVisitor

visitInvokeDynamicInsn

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

Overrides:

visitInvokeDynamicInsn in class org.objectweb.asm.MethodVisitor

visitJumpInsn

public void visitJumpInsn(int opcode,
                          org.objectweb.asm.Label label)

Overrides:

visitJumpInsn in class org.objectweb.asm.MethodVisitor

visitLabel

public void visitLabel(org.objectweb.asm.Label label)

Overrides:

visitLabel in class org.objectweb.asm.MethodVisitor

visitLdcInsn

public void visitLdcInsn(java.lang.Object cst)

Overrides:

visitLdcInsn in class org.objectweb.asm.MethodVisitor

visitIincInsn

public void visitIincInsn(int var,
                          int increment)

Overrides:

visitIincInsn in class org.objectweb.asm.MethodVisitor

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 org.objectweb.asm.Label dflt,
                                 org.objectweb.asm.Label... labels)

Overrides:

visitTableSwitchInsn in class org.objectweb.asm.MethodVisitor

visitLookupSwitchInsn

public void visitLookupSwitchInsn(org.objectweb.asm.Label dflt,
                                  int[] keys,
                                  org.objectweb.asm.Label[] labels)

Overrides:

visitLookupSwitchInsn in class org.objectweb.asm.MethodVisitor

visitMultiANewArrayInsn

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

Overrides:

visitMultiANewArrayInsn in class org.objectweb.asm.MethodVisitor

visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)

Overrides:

visitMaxs in class org.objectweb.asm.MethodVisitor