JML

org.jmlspecs.models
Class JMLObjectToEqualsMap

java.lang.Object
  extended byorg.jmlspecs.models.JMLObjectToEqualsRelation
      extended byorg.jmlspecs.models.JMLObjectToEqualsMap
All Implemented Interfaces:
Cloneable, JMLCollection, JMLType, Serializable

public class JMLObjectToEqualsMap
extends JMLObjectToEqualsRelation

Maps (i.e., binary relations that are functional) from non-null elements of Object to non-null elements of Object. The first type, Object, is called the domain type of the map; the second type, Object, is called the range type of the map. A map can be seen as a set of pairs, of form (dv, rv), consisting of an element of the domain type, dv, and an element of the range type, rv. Alternatively, it can be seen as a function that maps each element of the domain to some of elements of the range type.

This type is a subtype of JMLObjectToEqualsRelation, and as such as can be treated as a binary relation or a set valued function also. See the documentation for JMLObjectToEqualsRelation and for the methods inherited from this supertype for more information.

This type considers elements val and dv of the domain type, to be distinct just when _val_not_equal_to_dv_. It considers elements of r and rv of the range type to be distinct just when _r_not_equal_to_rv_. Cloning takes place for the domain or range elements if the corresponding domain or range type is JMLType.

Version:
$Revision: 1.34 $
Author:
Gary T. Leavens, Clyde Ruby
See Also:
JMLCollection, JMLType, JMLObjectToEqualsRelation, JMLObjectToEqualsRelationEnumerator, JMLObjectToEqualsRelationImageEnumerator, JMLValueSet, JMLObjectSet, JMLObjectToObjectMap, JMLValueToObjectMap, JMLObjectToValueMap, JMLValueToValueMap, JMLObjectToEqualsRelation.toFunction()

Field Summary
static JMLObjectToEqualsMap EMPTY
          The empty JMLObjectToEqualsMap.
 
Fields inherited from class org.jmlspecs.models.JMLObjectToEqualsRelation
domain_, imagePairSet_, size_, TOO_BIG_TO_UNION
 
Constructor Summary
  JMLObjectToEqualsMap()
          Initialize this map to be the empty mapping.
  JMLObjectToEqualsMap(Object dv, Object rv)
          Initialize this map to be a mapping that maps the given domain element to the given range element.
  JMLObjectToEqualsMap(JMLObjectEqualsPair pair)
          Initialize this map to be a mapping that maps the key in the given pair to the value in that pair.
protected JMLObjectToEqualsMap(JMLValueSet ipset, JMLObjectSet dom, int sz)
          Initialize this map based on the representation values given.
 
Method Summary
 Object apply(Object dv)
          Return the range element corresponding to dv, if there is one.
 JMLObjectToEqualsMap clashReplaceUnion(JMLObjectToEqualsMap othMap, Object errval)
          Return a new map that is like the union of the given map and this map, except that if both define a mapping for a given domain element, then each of these clashes is replaced by a mapping from the domain element in question to the given range element.
 Object clone()
          Return a clone of this object.
 JMLObjectToEqualsMap compose(JMLObjectToObjectMap othMap)
          Return a new map that is the composition of this and the given map.
 JMLValueToEqualsMap compose(JMLValueToObjectMap othMap)
          Return a new map that is the composition of this and the given map.
 JMLObjectToEqualsMap disjointUnion(JMLObjectToEqualsMap othMap)
          Return a map that is the disjoint union of this and othMap.
 JMLObjectToEqualsMap extend(Object dv, Object rv)
          Return a new map that is like this but maps the given domain element to the given range element.
 JMLObjectToEqualsMap extendUnion(JMLObjectToEqualsMap othMap)
          Return a new map that is like the union of the given map and this map, except that if both define a mapping for a given domain element, then only the mapping in the given map is retained.
 boolean isaFunction()
          Tells whether this relation is a function.
 JMLObjectToEqualsMap rangeRestrictedTo(JMLEqualsSet rng)
          Return a new map that is like this map but only contains associations that map to range elements in the given set.
 JMLObjectToEqualsMap removeDomainElement(Object dv)
          Return a new map that is like this but has no association for the given domain element.
 JMLObjectToEqualsMap restrictedTo(JMLObjectSet dom)
          Return a new map that only maps elements in the given domain to the corresponding range elements in this map.
static JMLObjectToEqualsMap singletonMap(Object dv, Object rv)
          Return the singleton map containing the given association.
static JMLObjectToEqualsMap singletonMap(JMLObjectEqualsPair pair)
          Return the singleton map containing the association described by the given pair.
 
Methods inherited from class org.jmlspecs.models.JMLObjectToEqualsRelation
add, associations, compose, compose, difference, domain, domainElements, elementImage, elements, equals, has, has, has, hashCode, image, imagePairs, imagePairSet, insert, int_size, intersection, inverse, inverseElementImage, inverseImage, isDefinedAt, isEmpty, iterator, range, rangeElements, remove, remove, removeFromDomain, restrictDomainTo, restrictRangeTo, singleton, singleton, toBag, toFunction, toSequence, toSet, toString, union
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

EMPTY

public static final JMLObjectToEqualsMap EMPTY
The empty JMLObjectToEqualsMap.

See Also:
JMLObjectToEqualsMap()
Constructor Detail

JMLObjectToEqualsMap

public JMLObjectToEqualsMap()
Initialize this map to be the empty mapping.

See Also:
EMPTY

JMLObjectToEqualsMap

public JMLObjectToEqualsMap(Object dv,
                            Object rv)
Initialize this map to be a mapping that maps the given domain element to the given range element.

See Also:
singletonMap(Object, Object), JMLObjectToEqualsMap(JMLObjectEqualsPair)

JMLObjectToEqualsMap

public JMLObjectToEqualsMap(JMLObjectEqualsPair pair)
Initialize this map to be a mapping that maps the key in the given pair to the value in that pair.

See Also:
singletonMap(JMLObjectEqualsPair), JMLObjectToEqualsMap(Object, Object)

JMLObjectToEqualsMap

protected JMLObjectToEqualsMap(JMLValueSet ipset,
                               JMLObjectSet dom,
                               int sz)
Initialize this map based on the representation values given.

Method Detail

singletonMap

public static JMLObjectToEqualsMap singletonMap(Object dv,
                                                Object rv)
Return the singleton map containing the given association.

See Also:
JMLObjectToEqualsMap(Object, Object), singletonMap(JMLObjectEqualsPair)

singletonMap

public static JMLObjectToEqualsMap singletonMap(JMLObjectEqualsPair pair)
Return the singleton map containing the association described by the given pair.

See Also:
JMLObjectToEqualsMap(JMLObjectEqualsPair), singletonMap(Object, Object)

isaFunction

public boolean isaFunction()
Tells whether this relation is a function.

Overrides:
isaFunction in class JMLObjectToEqualsRelation

apply

public Object apply(Object dv)
             throws JMLNoSuchElementException
Return the range element corresponding to dv, if there is one.

Parameters:
dv - the domain element for which an association is sought (the key to the table).
Throws:
JMLNoSuchElementException - when dv is not associated to any range element by this.
See Also:
JMLObjectToEqualsRelation.isDefinedAt(java.lang.Object), JMLObjectToEqualsRelation.elementImage(java.lang.Object), JMLObjectToEqualsRelation.image(org.jmlspecs.models.JMLObjectSet)

clone

public Object clone()
Description copied from class: JMLObjectToEqualsRelation
Return a clone of this object.

Specified by:
clone in interface JMLType
Overrides:
clone in class JMLObjectToEqualsRelation

extend

public JMLObjectToEqualsMap extend(Object dv,
                                   Object rv)
Return a new map that is like this but maps the given domain element to the given range element. Any previously existing mapping for the domain element is removed first.

See Also:
JMLObjectToEqualsRelation#insert(Object, Object)

removeDomainElement

public JMLObjectToEqualsMap removeDomainElement(Object dv)
Return a new map that is like this but has no association for the given domain element.

See Also:
JMLObjectToEqualsRelation.removeFromDomain(java.lang.Object)

compose

public JMLValueToEqualsMap compose(JMLValueToObjectMap othMap)
Return a new map that is the composition of this and the given map. The composition is done in the usual order; that is, if the given map maps x to y and this maps y to z, then the result maps x to z.

See Also:
compose(JMLObjectToObjectMap)

compose

public JMLObjectToEqualsMap compose(JMLObjectToObjectMap othMap)
Return a new map that is the composition of this and the given map. The composition is done in the usual order; that is, if the given map maps x to y and this maps y to z, then the result maps x to z.

See Also:
compose(JMLValueToObjectMap)

restrictedTo

public JMLObjectToEqualsMap restrictedTo(JMLObjectSet dom)
Return a new map that only maps elements in the given domain to the corresponding range elements in this map.

See Also:
rangeRestrictedTo(org.jmlspecs.models.JMLEqualsSet), JMLObjectToEqualsRelation.restrictDomainTo(org.jmlspecs.models.JMLObjectSet)

rangeRestrictedTo

public JMLObjectToEqualsMap rangeRestrictedTo(JMLEqualsSet rng)
Return a new map that is like this map but only contains associations that map to range elements in the given set.

See Also:
restrictedTo(org.jmlspecs.models.JMLObjectSet), JMLObjectToEqualsRelation.restrictRangeTo(org.jmlspecs.models.JMLEqualsSet)

extendUnion

public JMLObjectToEqualsMap extendUnion(JMLObjectToEqualsMap othMap)
                                 throws IllegalStateException
Return a new map that is like the union of the given map and this map, except that if both define a mapping for a given domain element, then only the mapping in the given map is retained.

Throws:
IllegalStateException
See Also:
clashReplaceUnion(org.jmlspecs.models.JMLObjectToEqualsMap, java.lang.Object), disjointUnion(org.jmlspecs.models.JMLObjectToEqualsMap), JMLObjectToEqualsRelation.union(org.jmlspecs.models.JMLObjectToEqualsRelation)

clashReplaceUnion

public JMLObjectToEqualsMap clashReplaceUnion(JMLObjectToEqualsMap othMap,
                                              Object errval)
                                       throws IllegalStateException
Return a new map that is like the union of the given map and this map, except that if both define a mapping for a given domain element, then each of these clashes is replaced by a mapping from the domain element in question to the given range element.

Parameters:
othMap - the other map.
errval - the range element to use when clashes occur.
Throws:
IllegalStateException
See Also:
extendUnion(org.jmlspecs.models.JMLObjectToEqualsMap), disjointUnion(org.jmlspecs.models.JMLObjectToEqualsMap), JMLObjectToEqualsRelation.union(org.jmlspecs.models.JMLObjectToEqualsRelation)

disjointUnion

public JMLObjectToEqualsMap disjointUnion(JMLObjectToEqualsMap othMap)
                                   throws JMLMapException,
                                          IllegalStateException
Return a map that is the disjoint union of this and othMap.

Parameters:
othMap - the other mapping
Throws:
JMLMapException - the ranges of this and othMap have elements in common (i.e., when they interesect).
IllegalStateException
See Also:
extendUnion(org.jmlspecs.models.JMLObjectToEqualsMap), clashReplaceUnion(org.jmlspecs.models.JMLObjectToEqualsMap, java.lang.Object), JMLObjectToEqualsRelation.union(org.jmlspecs.models.JMLObjectToEqualsRelation)

JML

JML is Copyright (C) 1998-2002 by Iowa State University and is distributed under the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This release depends on code from the MultiJava project and is based in part on the Kopi project Copyright (C) 1990-99 DMS Decision Management Systems Ges.m.b.H.