org.apache.tomcat.util.bcel.classfile
Class Code

java.lang.Object
  org.apache.tomcat.util.bcel.classfile.Attribute
      org.apache.tomcat.util.bcel.classfile.Code

All Implemented Interfaces:

Serializable, Cloneable

public final class Code
extends Attribute

This class represents a chunk of Java byte code contained in a method. It is instantiated by the Attribute.readAttribute() method. A Code attribute contains informations about operand stack, local variables, byte code and the exceptions handled within this method. This attribute has attributes itself, namely LineNumberTable which is used for debugging purposes and LocalVariableTable which contains information about the local variables.

Version:

$Id: Code.java 1181133 2011-10-10 18:49:14Z markt $

Author:

M. Dahm

See Also:

Attribute, CodeException, LineNumberTable, LocalVariableTable, Serialized Form

Field Summary

Fields inherited from class org.apache.tomcat.util.bcel.classfile.Attribute

constant_pool, length, name_index, tag

Constructor Summary

Code(int name_index, int length, int max_stack, int max_locals, byte[] code, CodeException[] exception_table, Attribute[] attributes, ConstantPool constant_pool)

Method Summary

Attribute	copy(ConstantPool _constant_pool)
void	dump(DataOutputStream file) Dump code attribute to file stream in binary format.
LocalVariableTable	getLocalVariableTable()
void	setAttributes(Attribute[] attributes)
void	setCode(byte[] code)
void	setExceptionTable(CodeException[] exception_table)
String	toString()
String	toString(boolean verbose)

Methods inherited from class org.apache.tomcat.util.bcel.classfile.Attribute

clone, getName, getTag, readAttribute

Methods inherited from class java.lang.Object

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

Constructor Detail

Code

public Code(int name_index,
            int length,
            int max_stack,
            int max_locals,
            byte[] code,
            CodeException[] exception_table,
            Attribute[] attributes,
            ConstantPool constant_pool)

Parameters:

name_index - Index pointing to the name Code

length - Content length in bytes

max_stack - Maximum size of stack

max_locals - Number of local variables

code - Actual byte code

exception_table - Table of handled exceptions

attributes - Attributes of code: LineNumber or LocalVariable

constant_pool - Array of constants

Method Detail

dump

public final void dump(DataOutputStream file)
                throws IOException

Dump code attribute to file stream in binary format.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream

Throws:

IOException

getLocalVariableTable

public LocalVariableTable getLocalVariableTable()

Returns:

LocalVariableTable of Code, if it has one

setAttributes

public final void setAttributes(Attribute[] attributes)

Parameters:

attributes - the attributes to set for this Code

setCode

public final void setCode(byte[] code)

Parameters:

code - byte code

setExceptionTable

public final void setExceptionTable(CodeException[] exception_table)

Parameters:

exception_table - exception table

toString

public final String toString(boolean verbose)

Returns:

String representation of code chunk.

toString

public final String toString()

Overrides:

toString in class Attribute

Returns:

String representation of code chunk.

copy

public Attribute copy(ConstantPool _constant_pool)

Specified by:

copy in class Attribute

Parameters:

_constant_pool - the constant pool to duplicate

Returns:

deep copy of this attribute