harpoon.Backend.Maps
Class FieldMap

java.lang.Object
  harpoon.Backend.Maps.FieldMap

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ClassFieldMap, PackedClassFieldMap, TinyPackedClassFieldMap

public abstract class FieldMap
extends Object
implements Serializable

A FieldMap assigns an ordering to a set of fields. Typically separate FieldMaps will be used for class fields (which are allocated locally) and static fields (which are allocated globally). Note that the ordering corresponds directly to an offset from the first ordered field when the size returned by fieldSize() is taken into account.

Version:

$Id: FieldMap.java,v 1.4 2003/04/19 01:03:54 salcianu Exp $

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>

See Also:

Serialized Form

Constructor Summary

FieldMap()

Method Summary

int	fieldAlignment(HField hf)
abstract List<HField>	fieldList(HClass hc) Return an unmodifiable List over all appropriate fields in the given class, in order from smallest to largest offset.
abstract int	fieldOffset(HField hf) Return an offset to the given field.
abstract int	fieldSize(HField hf) Return the allocated size of a given field.

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldMap

public FieldMap()

Method Detail

fieldOffset

public abstract int fieldOffset(HField hf)

Return an offset to the given field.

fieldList

public abstract List<HField> fieldList(HClass hc)

Return an unmodifiable List over all appropriate fields in the given class, in order from smallest to largest offset.

fieldSize

public abstract int fieldSize(HField hf)

Return the allocated size of a given field.

fieldAlignment

public int fieldAlignment(HField hf)