Package org.apache.bcel.classfile
Class Code
- java.lang.Object
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- org.apache.bcel.classfile.Attribute
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- org.apache.bcel.classfile.Code
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- All Implemented Interfaces:
java.lang.Cloneable
,Node
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:
- $Id$
- See Also:
Attribute
,CodeException
,LineNumberTable
,LocalVariableTable
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Field Summary
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Fields inherited from class org.apache.bcel.classfile.Attribute
constant_pool, length, name_index, tag
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Constructor Summary
Constructors Constructor Description Code(int name_index, int length, int max_stack, int max_locals, byte[] code, CodeException[] exception_table, Attribute[] attributes, ConstantPool constant_pool)
Code(Code c)
Initialize from another object.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
accept(Visitor v)
Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class.Attribute
copy(ConstantPool _constant_pool)
void
dump(java.io.DataOutputStream file)
Dump code attribute to file stream in binary format.Attribute[]
getAttributes()
byte[]
getCode()
CodeException[]
getExceptionTable()
LineNumberTable
getLineNumberTable()
LocalVariableTable
getLocalVariableTable()
int
getMaxLocals()
int
getMaxStack()
void
setAttributes(Attribute[] attributes)
void
setCode(byte[] code)
void
setExceptionTable(CodeException[] exception_table)
void
setMaxLocals(int max_locals)
void
setMaxStack(int max_stack)
java.lang.String
toString()
java.lang.String
toString(boolean verbose)
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Methods inherited from class org.apache.bcel.classfile.Attribute
addAttributeReader, addAttributeReader, clone, getConstantPool, getLength, getName, getNameIndex, getTag, readAttribute, readAttribute, removeAttributeReader, setConstantPool, setLength, setNameIndex
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Constructor Detail
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Code
public Code(Code c)
Initialize from another object. Note that both objects use the same references (shallow copy). Use copy() for a physical copy.
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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
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Method Detail
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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.
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dump
public final void dump(java.io.DataOutputStream file) throws java.io.IOException
Dump code attribute to file stream in binary format.
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getAttributes
public final Attribute[] getAttributes()
- Returns:
- Collection of code attributes.
- See Also:
Attribute
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getLineNumberTable
public LineNumberTable getLineNumberTable()
- Returns:
- LineNumberTable of Code, if it has one
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getLocalVariableTable
public LocalVariableTable getLocalVariableTable()
- Returns:
- LocalVariableTable of Code, if it has one
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getCode
public final byte[] getCode()
- Returns:
- Actual byte code of the method.
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getExceptionTable
public final CodeException[] getExceptionTable()
- Returns:
- Table of handled exceptions.
- See Also:
CodeException
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getMaxLocals
public final int getMaxLocals()
- Returns:
- Number of local variables.
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getMaxStack
public final int getMaxStack()
- Returns:
- Maximum size of stack used by this method.
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setAttributes
public final void setAttributes(Attribute[] attributes)
- Parameters:
attributes
- the attributes to set for this Code
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setCode
public final void setCode(byte[] code)
- Parameters:
code
- byte code
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setExceptionTable
public final void setExceptionTable(CodeException[] exception_table)
- Parameters:
exception_table
- exception table
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setMaxLocals
public final void setMaxLocals(int max_locals)
- Parameters:
max_locals
- maximum number of local variables
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setMaxStack
public final void setMaxStack(int max_stack)
- Parameters:
max_stack
- maximum stack size
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toString
public final java.lang.String toString(boolean verbose)
- Returns:
- String representation of code chunk.
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toString
public final java.lang.String toString()
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copy
public Attribute copy(ConstantPool _constant_pool)
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