org.multijava.util.classfile
Class UniverseMethodAttribute

java.lang.Object
  org.multijava.util.classfile.Attribute
      org.multijava.util.classfile.UniverseMethodAttribute

public class UniverseMethodAttribute

extends Attribute

This class implements a JUTS method attribute. The attribute contains information about the method's purity and the universe annotations of its parameters and return type. The format of the attribute (not including the standard initial six bytes): - the first byte is either 0 or 1, and represents the method's purity - the second byte is the return type's annotation. This is zero if the method has no return type - the following bytes are the parameter's annotations This attribute is recognized by UniverseAttributeParser. VMS 4.7.1: The attribute's name is org.multijava.universe_method

Author:

AHS

See Also:

UniverseAttributeParser

Field Summary
private static AsciiConstant	attr
private  boolean	isPure           the method's purity
private  byte[]	paramConstants           the encoded universe type modifiers for the parameter types
private  byte	retConstant           the encoded universe type modifier for the return type
(package private) static String	tagString           the attribute's name

 

Constructor Summary

UniverseMethodAttribute(boolean isPure, byte retTypeByteConstant, byte[] paramConstants)           Construct a method attribute for a method with non-void return type.

UniverseMethodAttribute(boolean isPure, byte[] paramConstants)           Construct a method attribute for a method with void return type.

UniverseMethodAttribute(DataInput in, ConstantPool cp)           Constructs a Universe Method Attribute from a class file stream.

 

Method Summary
byte[]	getParamConstants()           Return the byte constants representing the parameter annotations.
boolean	getPurity()           Return the method's purity.
byte	getRetTypeConstant()           Return the byte constant representing the return type's annotation.
protected  int	getSize()           Return the attribute's size, this attribute has variable size dependent on the number of parameters.
protected  int	getTag()           Return this attribute's tag.
protected  void	resolveConstants(ConstantPool cp)           Insert or check location of constant value on constant pool.
protected  void	write(ConstantPool cp, DataOutput out)           Write this class into the the file (out) getting data position from the constant pool.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

tagString

static final String tagString

the attribute's name

attr

private static AsciiConstant attr

isPure

private boolean isPure

the method's purity

retConstant

private byte retConstant

the encoded universe type modifier for the return type

paramConstants

private byte[] paramConstants

the encoded universe type modifiers for the parameter types

UniverseMethodAttribute

public UniverseMethodAttribute(boolean isPure,
                               byte[] paramConstants)

Construct a method attribute for a method with void return type.

Parameters:

isPure - the purity of the method

paramConstants - the byte constants for the parameters

UniverseMethodAttribute

public UniverseMethodAttribute(boolean isPure,
                               byte retTypeByteConstant,
                               byte[] paramConstants)

Construct a method attribute for a method with non-void return type.

Parameters:

isPure - the purity of the method

retTypeByteConstant - the byte constant for the return type

paramConstants - the byte constants for the parameters

UniverseMethodAttribute

public UniverseMethodAttribute(DataInput in,
                               ConstantPool cp)
                        throws IOException,
                               ClassFileFormatException

Constructs a Universe Method Attribute from a class file stream.

Parameters:

in - the stream to read from

cp - the constant pool

Throws:

IOException - an io problem has occured

ClassFileFormatException - attempt to write a bad classfile info

getPurity

public boolean getPurity()

Return the method's purity.

getRetTypeConstant

public byte getRetTypeConstant()

Return the byte constant representing the return type's annotation.

getParamConstants

public byte[] getParamConstants()

Return the byte constants representing the parameter annotations.

getTag

protected int getTag()

Return this attribute's tag.

getSize

protected int getSize()

Return the attribute's size, this attribute has variable size dependent on the number of parameters.

resolveConstants

protected void resolveConstants(ConstantPool cp)
                         throws ClassFileFormatException

Insert or check location of constant value on constant pool.

Parameters:

cp - the constant pool for this class

Throws:

ClassFileFormatException

write

protected void write(ConstantPool cp,
                     DataOutput out)
              throws IOException,
                     ClassFileFormatException

Write this class into the the file (out) getting data position from the constant pool.

Parameters:

cp - the constant pool that contain all data

out - the file where to write this object info

Throws:

IOException - an io problem has occured

ClassFileFormatException