Package com.tonic.parser.attribute

Class CodeAttribute

java.lang.Object

com.tonic.parser.attribute.Attribute

com.tonic.parser.attribute.CodeAttribute

public class CodeAttribute
extends Attribute

The Code attribute: a method's bytecode, stack/local sizes, exception table, and nested attributes.

Constructor Summary

Constructors

Constructor	Description
CodeAttribute(String name, ClassFile parent, int nameIndex, int length)	Creates the attribute shell for parsing, attached to a class.
CodeAttribute(String name, MemberEntry parent, int nameIndex, int length)	Creates the attribute shell for parsing, attached to a member.

Method Summary

Modifier and Type	Method	Description
void	accept(AbstractMethodVisitor abstractMethodVisitor)	Accepts a visitor for bytecode analysis.
List<Attribute>	getAttributes()
ClassFile	getClassFile()	Returns the class file that owns this code attribute.
byte[]	getCode()
List<ExceptionTableEntry>	getExceptionTable()
int	getMaxLocals()
int	getMaxStack()
MethodEntry	getMethod()	Returns the method that owns this code attribute, or null if its parent is not a method.
void	read(ClassFile classFile, int length)	Reads the attribute data from the class file.
void	setAttributes(List<Attribute> attributes)
void	setCode(byte[] code)
void	setMaxLocals(int maxLocals)
void	setMaxStack(int maxStack)
void	setParent(MethodEntry methodEntry)	Sets the parent method entry for this code attribute.
String	toString()
void	updateLength()	Recomputes the attribute length field from the current in-memory content.

Methods inherited from class com.tonic.parser.attribute.Attribute

get, write

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CodeAttribute

public CodeAttribute(String name,
                     MemberEntry parent,
                     int nameIndex,
                     int length)

Creates the attribute shell for parsing, attached to a member.

Parameters:

name - the attribute name

parent - the member the attribute belongs to

nameIndex - constant-pool index of the name Utf8

length - the attribute length in bytes

CodeAttribute

public CodeAttribute(String name,
                     ClassFile parent,
                     int nameIndex,
                     int length)

Creates the attribute shell for parsing, attached to a class.

Parameters:

name - the attribute name

parent - the class the attribute belongs to

nameIndex - constant-pool index of the name Utf8

length - the attribute length in bytes

Method Detail

getMaxStack

public int getMaxStack()

Returns:

the max stack

getMaxLocals

public int getMaxLocals()

Returns:

the max locals

getCode

public byte[] getCode()

Returns:

the code

getExceptionTable

public List<ExceptionTableEntry> getExceptionTable()

Returns:

the exception table

getAttributes

public List<Attribute> getAttributes()

Returns:

the attributes

setMaxStack

public void setMaxStack(int maxStack)

Parameters:

maxStack - the operand stack size limit

setMaxLocals

public void setMaxLocals(int maxLocals)

Parameters:

maxLocals - the local variable slot count

setCode

public void setCode(byte[] code)

Parameters:

code - the raw bytecode

setAttributes

public void setAttributes(List<Attribute> attributes)

Parameters:

attributes - the nested code attributes

read

public void read(ClassFile classFile,
                 int length)

Description copied from class: Attribute

Reads the attribute data from the class file.

Specified by:

read in class Attribute

Parameters:

classFile - The ClassFile utility to read data.

length - The length of the attribute.

setParent

public void setParent(MethodEntry methodEntry)

Sets the parent method entry for this code attribute.

Parameters:

methodEntry - The parent method entry

getClassFile

public ClassFile getClassFile()

Returns the class file that owns this code attribute.

Returns:

the owning class file

getMethod

public MethodEntry getMethod()

Returns the method that owns this code attribute, or null if its parent is not a method.

Returns:

the owning method entry, or null

updateLength

public void updateLength()

Description copied from class: Attribute

Recomputes the attribute length field from the current in-memory content.

Specified by:

updateLength in class Attribute

toString

public String toString()

Overrides:

toString in class Attribute

accept

public void accept(AbstractMethodVisitor abstractMethodVisitor)

Accepts a visitor for bytecode analysis.

Parameters:

abstractMethodVisitor - The visitor to accept