org.aspectj.apache.bcel.classfile
Class Code
java.lang.Object
org.aspectj.apache.bcel.classfile.Attribute
org.aspectj.apache.bcel.classfile.Code
- All Implemented Interfaces:
- java.io.Serializable, 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.
- See Also:
Attribute
,
CodeException
,
LineNumberTable
,
LocalVariableTable
,
Serialized Form
Methods inherited from class java.lang.Object |
clone, 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 copy() 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(ClassVisitor 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.
- Specified by:
accept
in interface Node
- Specified by:
accept
in class Attribute
- Parameters:
v
- Visitor object
dump
public final void dump(java.io.DataOutputStream file)
throws java.io.IOException
- Dump code attribute to file stream in binary format.
- Overrides:
dump
in class Attribute
- Parameters:
file
- Output file stream
- Throws:
java.io.IOException
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()
- Overrides:
toString
in class Attribute
- Returns:
- String representation of code chunk.
getCodeString
public java.lang.String getCodeString()
- Returns the same as toString(true) except that the attribute information isn't included (line numbers). Can be used to check
whether two pieces of code are equivalent.