de.fub.bytecode.classfile
Class Code
java.lang.Object
|
+--de.fub.bytecode.classfile.Attribute
|
+--de.fub.bytecode.classfile.Code
- public final class Code
- extends Attribute
This class is derived from Attribute and represents a
code chunk. 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,v 1.10 1999/07/09 15:54:26 dahm Exp $
- Author:
- M. Dahm
- See Also:
Attribute
,
CodeException
,
LineNumberTable
,
LocalVariableTable
Methods inherited from class java.lang.Object |
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
Code
public Code(Code c)
- Initialize from another object. Note that both objects use the same
references (shallow copy). Use clone() for a physical copy.
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 Codelength
- Content length in bytesmax_stack
- Maximum size of stackmax_locals
- Number of local variablescode
- Actual byte codeexception_table
- Table of handled exceptionsattributes
- Attributes of code: LineNumber or LocalVariableconstant_pool
- Array of constants
accept
public void accept(Visitor v)
- Called by objects that are traversing the nodes of the tree implicitely
defined by the contents of a Java class. I.e., the hierarchy of methods,
fields, attributes, etc. spawns a tree of objects.
- Parameters:
v
- Visitor object- Overrides:
- accept in class Attribute
dump
public final void dump(java.io.DataOutputStream file)
throws java.io.IOException
- Dump code attribute to file stream in binary format.
- Parameters:
file
- Output file stream- Overrides:
- dump in class Attribute
getAttributes
public final Attribute[] getAttributes()
- Returns:
- Collection of code attributes.
- See Also:
Attribute
getLineNumberTable
public LineNumberTable getLineNumberTable()
- Returns:
- LineNumberTable of Code, if it has one
getLocalVariableTable
public LocalVariableTable getLocalVariableTable()
- Returns:
- LocalVariableTable of Code, if it has one
getCode
public final byte[] getCode()
- Returns:
- Actual byte code of the method.
getExceptionTable
public final CodeException[] getExceptionTable()
- Returns:
- Table of handled exceptions.
- See Also:
CodeException
getMaxLocals
public final int getMaxLocals()
- Returns:
- Number of local variables.
getMaxStack
public final int getMaxStack()
- Returns:
- Maximum size of stack used by this method.
setAttributes
public final void setAttributes(Attribute[] attributes)
- Parameters:
attributes.
-
setCode
public final void setCode(byte[] code)
- Parameters:
code
- byte code
setExceptionTable
public final void setExceptionTable(CodeException[] exception_table)
- Parameters:
exception_table
- exception table
setMaxLocals
public final void setMaxLocals(int max_locals)
- Parameters:
max_locals
- maximum number of local variables
setMaxStack
public final void setMaxStack(int max_stack)
- Parameters:
max_stack
- maximum stack size
toString
public final java.lang.String toString(boolean verbose)
- Returns:
- String representation of code chunk.
toString
public final java.lang.String toString()
- Returns:
- String representation of code chunk.
- Overrides:
- toString in class Attribute
copy
public Attribute copy(ConstantPool constant_pool)
- Returns:
- deep copy of this attribute
- Overrides:
- copy in class Attribute