net.sf.jiapi.file.attribute

Class Code

java.lang.Object

net.sf.jiapi.file.attribute.Attribute

net.sf.jiapi.file.attribute.Code

public class Code
extends Attribute

Code attribute. see ch. 4.8.3

Author:

Mika Riekkinen

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Code.ExceptionTableEntry ExceptionTableEntry.

Field Summary

Fields

Modifier and Type	Field and Description
static String	ATTRIBUTE_NAME

Fields inherited from class net.sf.jiapi.file.attribute.Attribute

config, cp

Constructor Summary

Constructors

Constructor and Description
Code(ConstantPool cp, short max_stack, short max_locals) Constructor for an empty CodeAttribute.

Method Summary

Modifier and Type	Method and Description
Attribute	getAttribute(String name) Gets a named attribute.
List<Attribute>	getAttributes() Gets all the attributes defined in this CodeAttribute.
byte[]	getByteCode() Gets the bytecode array of this CodeAttribute
byte[]	getBytes() Get the bytes of this attribute.
List<Code.ExceptionTableEntry>	getExceptionTable() Get the exception table.
LineNumberTable	getLineNumberTable() Gets the LineNumberTable attribute of this CodeAttribute, if it exists.
LocalVariableTable	getLocalVariableTable() Gets the LocalVariableTable attribute of this CodeAttribute, if it exists.
LocalVariableTypeTable	getLocalVariableTypeTable() Gets the LocalVariableTypeTable attribute of this CodeAttribute, if it exists.
short	getMaxLocals() Get max_locals.
short	getMaxStack() Get the max_stack.
StackMapTable	getStackMapTable() Gets the StackMapTable attribute.
void	setByteCode(byte[] byteCode) Sets the bytecode array of this CodeAttribute.
void	setMaxLocals(short maxLocals) Sets the max_locals.
void	setMaxStack(short maxStack) Sets the max_stack.

Methods inherited from class net.sf.jiapi.file.attribute.Attribute

getAttributeNameIndex, getDataInputStream, getName, readAttribute, setConstantPool, toString

Methods inherited from class java.lang.Object

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

Field Detail

ATTRIBUTE_NAME

public static final String ATTRIBUTE_NAME

See Also:

Constant Field Values

Constructor Detail

Code

public Code(ConstantPool cp,
            short max_stack,
            short max_locals)

Constructor for an empty CodeAttribute. No bytecode is created.

Parameters:

cp - ConstantPool

max_stack - Max stack

max_locals - Max locals

Method Detail

getMaxStack

public short getMaxStack()

Get the max_stack. The value of the max_stack item gives the maximum depth (2.6.2) of the operand stack of this method at any point during execution of the method.

Returns:

max_stack

setMaxStack

public void setMaxStack(short maxStack)

Sets the max_stack. Note that no check is made whether or not this value is correct or not. If it incorrect, verifier will not allow the class to be loaded into JVM.

Parameters:

maxStack - max_stack

getMaxLocals

public short getMaxLocals()

Get max_locals. The value of the max_locals item gives the number of local variables in the local variable array allocated upon invocation of this method, including the local variables used to pass parameters to the method on its invocation.

Returns:

max_locals

setMaxLocals

public void setMaxLocals(short maxLocals)

Sets the max_locals. Note that no check is made whether or not this value is correct or not. If it incorrect, verifier will not allow the class to be loaded into JVM.

Parameters:

maxLocals - Max locals

getByteCode

public byte[] getByteCode()

Gets the bytecode array of this CodeAttribute

Returns:

bytes

setByteCode

public void setByteCode(byte[] byteCode)

Sets the bytecode array of this CodeAttribute. Note that all the other CodeAttribute properties must match contents of the array, like max_stack and max_locals.

Parameters:

byteCode - bytes

getBytes

public byte[] getBytes()

Description copied from class: Attribute

Get the bytes of this attribute.

Overrides:

getBytes in class Attribute

Returns:

bytes representing this Attribute.

getAttributes

public List<Attribute> getAttributes()

Gets all the attributes defined in this CodeAttribute.

Returns:

a List of Attributes

getAttribute

public Attribute getAttribute(String name)

Gets a named attribute.

Parameters:

name - Name of the attribute

Returns:

Named attribute or null if it does not exist.

getExceptionTable

public List<Code.ExceptionTableEntry> getExceptionTable()

Get the exception table.

Returns:

a List of ExceptionTableEntrys

getStackMapTable

public StackMapTable getStackMapTable()

Gets the StackMapTable attribute.

Returns:

StackMapTableAttribute

getLineNumberTable

public LineNumberTable getLineNumberTable()

Gets the LineNumberTable attribute of this CodeAttribute, if it exists.

Returns:

LineNumberTable attribute, or null if it does not exist

getLocalVariableTable

public LocalVariableTable getLocalVariableTable()

Gets the LocalVariableTable attribute of this CodeAttribute, if it exists.

Returns:

LocalVariableTable attribute, or null if it does not exist

getLocalVariableTypeTable

public LocalVariableTypeTable getLocalVariableTypeTable()

Gets the LocalVariableTypeTable attribute of this CodeAttribute, if it exists.

Returns:

LocalVariableTypeTable attribute, or null if it does not exist