org.jmlspecs.models
Class JMLEqualsToEqualsRelation

java.lang.Object
  org.jmlspecs.models.JMLEqualsToEqualsRelation

All Implemented Interfaces:

Cloneable, JMLCollection, JMLType, Serializable

Direct Known Subclasses:

JMLEqualsToEqualsMap

public class JMLEqualsToEqualsRelation

extends Object

implements JMLCollection

Binary relations (or set-valued functions) from non-null elements of Object to non-null elements of Object. The first type, Object, is called the domain type of the relation; the second type, Object, is called the range type of the relation. A relation 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 set-valued function that relates each element of the domain type to some set of elements of the range type (a JMLEqualsSet).

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

Version:

$Revision: 1.48 $

Author:

Gary T. Leavens, Clyde Ruby

See Also:

JMLCollection, JMLType, JMLEqualsToEqualsMap, JMLEqualsToEqualsRelationEnumerator, JMLEqualsToEqualsRelationImageEnumerator, JMLValueSet, JMLObjectSet, JMLObjectToObjectRelation, JMLValueToObjectRelation, JMLObjectToValueRelation, JMLValueToValueRelation

Field Summary
protected  JMLEqualsSet	domain_           The set of pairs of keys and values conceptually contained in this object.
static JMLEqualsToEqualsRelation	EMPTY           The empty JMLEqualsToEqualsRelation.
protected  JMLValueSet	imagePairSet_           The set representing the image pairs in the relation.
protected  int	size_           The size (number of pairs) of this relation.
private static String	TOO_BIG_TO_INSERT
protected static String	TOO_BIG_TO_UNION

 

Constructor Summary
	JMLEqualsToEqualsRelation()           Initialize this to be an empty relation.
	JMLEqualsToEqualsRelation(Object dv, Object rv)           Initialize this to be a relation containing a single association between the given domain and range elements.
	JMLEqualsToEqualsRelation(JMLEqualsEqualsPair pair)           Initialize this to be a relation containing a single association given by the pair.
protected	JMLEqualsToEqualsRelation(JMLValueSet ipset, JMLEqualsSet dom, int sz)           Initialize this using the given representation.

 

Method Summary
JMLEqualsToEqualsRelation	add(Object dv, Object rv)           Return a relation that is just like this relation, except that it also associates the given domain element to the given range element.
JMLEqualsToEqualsRelationEnumerator	associations()           Return a enumerator for the set of associations that conceptually make up this relation.
Object	clone()           Return a clone of this object.
JMLObjectToEqualsRelation	compose(JMLObjectToEqualsRelation othRel)           Return a relation that is the composition of the given relation and this relation.
JMLValueToEqualsRelation	compose(JMLValueToEqualsRelation othRel)           Return a relation that is the composition of the given relation and this relation.
JMLEqualsToEqualsRelation	difference(JMLEqualsToEqualsRelation othRel)           Return a relation that is the difference between this and the given relation.
JMLEqualsSet	domain()           Returns a set containing the domain of this relation.
JMLEqualsSetEnumerator	domainElements()           Return a enumerator for the set that is the domain of this relation.
JMLEqualsSet	elementImage(Object dv)           Returns a set containing all the range elements that this relation relates to the given domain element.
JMLEqualsToEqualsRelationEnumerator	elements()           Return a enumerator for the set of associations that conceptually make up this relation.
boolean	equals(Object obj)           Test whether this object's value is equal to the given argument.
boolean	has(Object obj)           Tells whether this associates the given key to the given value.
boolean	has(Object dv, Object rv)           Tells whether this associates the given key to the given value.
boolean	has(JMLEqualsEqualsPair pair)           Tells whether this associates the given key to the given value.
int	hashCode()           Return a hash code for this object.
JMLEqualsSet	image(JMLEqualsSet dom)           Returns a set containing all the range elements that this relation relates to the elements of the given set of domain elements.
JMLEqualsToEqualsRelationImageEnumerator	imagePairs()           Return the set of domain image set pairs that make up this relation.
JMLValueSet	imagePairSet()           Return the set of image set pairs that make up this relation.
JMLEqualsToEqualsRelation	insert(JMLEqualsEqualsPair pair)           Return a relation that is just like this relation, except that it also includes the association described by the given pair.
int	int_size()           Return the number of associations in this relation.
JMLEqualsToEqualsRelation	intersection(JMLEqualsToEqualsRelation othRel)           Return a relation that is the intersection of this and the given relation.
JMLEqualsToEqualsRelation	inverse()           Returns the inverse of this relation.
JMLEqualsSet	inverseElementImage(Object rv)           Return a set of all the domain elements that relate to the given range element.
JMLEqualsSet	inverseImage(JMLEqualsSet rng)           Return a set of all the domain elements that relate to some element in the given set of range elements.
boolean	isaFunction()           Tells whether this relation is a function.
boolean	isDefinedAt(Object dv)           Tells whether this relation associates any range element to the given domain element.
boolean	isEmpty()           Tells whether the relation is empty.
JMLIterator	iterator()           Returns an Iterator over the set of pairs conceptually contained in this relation..
JMLEqualsSet	range()           Returns a set containing the range of this relation.
JMLEqualsSetEnumerator	rangeElements()           Return a enumerator for the set that is the range of this relation.
JMLEqualsToEqualsRelation	remove(Object dv, Object rv)           Return a relation that is just like this relation, except that it does not contain the association, if any, between the given domain and range elements.
JMLEqualsToEqualsRelation	remove(JMLEqualsEqualsPair pair)           Return a relation that is just like this relation, except that it does not contain association described by the given pair.
JMLEqualsToEqualsRelation	removeFromDomain(Object dv)           Return a relation that is just like this relation, except that it does not contain any association with the given domain element.
JMLEqualsToEqualsRelation	restrictDomainTo(JMLEqualsSet dom)           Return a relation that is like this relation except that its domain is limited to just the elements of the given set.
JMLEqualsToEqualsRelation	restrictRangeTo(JMLEqualsSet rng)           Return a relation that is like this relation except that its range is limited to just the elements of the given set.
static JMLEqualsToEqualsRelation	singleton(Object dv, Object rv)           Return the singleton relation containing the given association.
static JMLEqualsToEqualsRelation	singleton(JMLEqualsEqualsPair pair)           Return the singleton relation containing the association described by the given pair.
JMLValueBag	toBag()           Return the bag of all associations in this relation.
JMLEqualsToEqualsMap	toFunction()           Return a map that is contained in this relation.
JMLValueSequence	toSequence()           Return a sequence containing all associations in this relation.
JMLValueSet	toSet()           Return the set of all associations in this relation.
String	toString()           Return a string representation of this object.
JMLEqualsToEqualsRelation	union(JMLEqualsToEqualsRelation othRel)           Return a relation that union of the this and the given relation.

 

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

domain_

protected final JMLEqualsSet domain_

The set of pairs of keys and values conceptually contained in this object. The set of elements in the domain of this relation.

imagePairSet_

protected final JMLValueSet imagePairSet_

The set representing the image pairs in the relation. The elements of this set are JMLEqualsValuePairs, which are all non-null. Each such pair has a key which is an element in domain_ and a value which is a JMLEqualsSet containing all of the elements that the key of the pair is related to.

size_

protected final int size_

The size (number of pairs) of this relation.

EMPTY

public static final JMLEqualsToEqualsRelation EMPTY

The empty JMLEqualsToEqualsRelation.

See Also:

JMLEqualsToEqualsRelation()

TOO_BIG_TO_INSERT

private static final String TOO_BIG_TO_INSERT

TOO_BIG_TO_UNION

protected static final String TOO_BIG_TO_UNION

JMLEqualsToEqualsRelation

public JMLEqualsToEqualsRelation()

Initialize this to be an empty relation. That is, the value is an empty set of pairs.

See Also:

EMPTY

JMLEqualsToEqualsRelation

public JMLEqualsToEqualsRelation(Object dv,
                                 Object rv)

Initialize this to be a relation containing a single association between the given domain and range elements.

See Also:

singleton(Object, Object), JMLEqualsToEqualsRelation(JMLEqualsEqualsPair)

JMLEqualsToEqualsRelation

public JMLEqualsToEqualsRelation(JMLEqualsEqualsPair pair)

Initialize this to be a relation containing a single association given by the pair.

See Also:

singleton(JMLEqualsEqualsPair), JMLEqualsToEqualsRelation(Object, Object)

JMLEqualsToEqualsRelation

protected JMLEqualsToEqualsRelation(JMLValueSet ipset,
                                    JMLEqualsSet dom,
                                    int sz)

Initialize this using the given representation.

singleton

public static JMLEqualsToEqualsRelation singleton(Object dv,
                                                  Object rv)

Return the singleton relation containing the given association.

See Also:

singleton(JMLEqualsEqualsPair), JMLEqualsToEqualsRelation(Object, Object)

singleton

public static JMLEqualsToEqualsRelation singleton(JMLEqualsEqualsPair pair)

Return the singleton relation containing the association described by the given pair.

See Also:

singleton(Object, Object), JMLEqualsToEqualsRelation(JMLEqualsEqualsPair)

isaFunction

public boolean isaFunction()

Tells whether this relation is a function.

See Also:

JMLEqualsToEqualsMap

elementImage

public JMLEqualsSet elementImage(Object dv)

Returns a set containing all the range elements that this relation relates to the given domain element.

See Also:

image(org.jmlspecs.models.JMLEqualsSet), JMLEqualsToEqualsMap.apply(java.lang.Object)

image

public JMLEqualsSet image(JMLEqualsSet dom)

Returns a set containing all the range elements that this relation relates to the elements of the given set of domain elements.

See Also:

elementImage(java.lang.Object), inverseImage(org.jmlspecs.models.JMLEqualsSet), JMLEqualsToEqualsMap.apply(java.lang.Object)

inverse

public JMLEqualsToEqualsRelation inverse()

Returns the inverse of this relation. The inverse is the relation that relates each range element to the corresponding domain element.

See Also:

inverseImage(org.jmlspecs.models.JMLEqualsSet), inverseElementImage(java.lang.Object)

inverseElementImage

public JMLEqualsSet inverseElementImage(Object rv)

Return a set of all the domain elements that relate to the given range element.

See Also:

inverseImage(org.jmlspecs.models.JMLEqualsSet), inverse(), elementImage(java.lang.Object)

inverseImage

public JMLEqualsSet inverseImage(JMLEqualsSet rng)

Return a set of all the domain elements that relate to some element in the given set of range elements.

See Also:

inverseElementImage(java.lang.Object), inverse(), image(org.jmlspecs.models.JMLEqualsSet)

isDefinedAt

public boolean isDefinedAt(Object dv)

Tells whether this relation associates any range element to the given domain element.

See Also:

domain()

has

public boolean has(Object dv,
                   Object rv)

Tells whether this associates the given key to the given value.

See Also:

isDefinedAt(java.lang.Object), has(JMLEqualsEqualsPair)

has

public boolean has(JMLEqualsEqualsPair pair)

Tells whether this associates the given key to the given value.

See Also:

isDefinedAt(java.lang.Object), has(Object, Object)

has

public boolean has(Object obj)

Tells whether this associates the given key to the given value.

Specified by:

has in interface JMLCollection

See Also:

isDefinedAt(java.lang.Object), has(JMLEqualsEqualsPair)

isEmpty

public boolean isEmpty()

Tells whether the relation is empty.

See Also:

int_size()

clone

public Object clone()

Return a clone of this object.

Specified by:

clone in interface JMLType

Overrides:

clone in class Object

equals

public boolean equals(Object obj)

Test whether this object's value is equal to the given argument.

Specified by:

equals in interface JMLType

Overrides:

equals in class Object

hashCode

public int hashCode()

Return a hash code for this object.

Specified by:

hashCode in interface JMLType

Overrides:

hashCode in class Object

domain

public JMLEqualsSet domain()

Returns a set containing the domain of this relation.

See Also:

domainElements(), associations(), isDefinedAt(java.lang.Object), image(org.jmlspecs.models.JMLEqualsSet), range(), inverse()

range

public JMLEqualsSet range()

Returns a set containing the range of this relation.

See Also:

rangeElements(), associations(), inverseElementImage(java.lang.Object), domain(), inverse()

add

public JMLEqualsToEqualsRelation add(Object dv,
                                     Object rv)
                              throws NullPointerException,
                                     IllegalStateException

Return a relation that is just like this relation, except that it also associates the given domain element to the given range element.

Throws:

NullPointerException

IllegalStateException

See Also:

insert(org.jmlspecs.models.JMLEqualsEqualsPair)

insert

public JMLEqualsToEqualsRelation insert(JMLEqualsEqualsPair pair)
                                 throws IllegalStateException

Return a relation that is just like this relation, except that it also includes the association described by the given pair.

Throws:

IllegalStateException

See Also:

add(java.lang.Object, java.lang.Object)

removeFromDomain

public JMLEqualsToEqualsRelation removeFromDomain(Object dv)

Return a relation that is just like this relation, except that it does not contain any association with the given domain element.

See Also:

remove(JMLEqualsEqualsPair), removeFromDomain(java.lang.Object)

remove

public JMLEqualsToEqualsRelation remove(Object dv,
                                        Object rv)

Return a relation that is just like this relation, except that it does not contain the association, if any, between the given domain and range elements.

See Also:

removeFromDomain(java.lang.Object), remove(Object, Object), remove(JMLEqualsEqualsPair)

remove

public JMLEqualsToEqualsRelation remove(JMLEqualsEqualsPair pair)

Return a relation that is just like this relation, except that it does not contain association described by the given pair.

See Also:

remove(Object, Object), removeFromDomain(java.lang.Object)

compose

public JMLValueToEqualsRelation compose(JMLValueToEqualsRelation othRel)

Return a relation that is the composition of the given relation and this relation. The composition is done in the "usual" order, so that if the given relation relates x to y, and this relation relates y to z, then the result relates x to z.

See Also:

compose(JMLObjectToEqualsRelation)

compose

public JMLObjectToEqualsRelation compose(JMLObjectToEqualsRelation othRel)

Return a relation that is the composition of the given relation and this relation. The composition is done in the "usual" order, so that if the given relation relates x to y, and this relation relates y to z, then the result relates x to z.

See Also:

compose(JMLValueToEqualsRelation)

union

public JMLEqualsToEqualsRelation union(JMLEqualsToEqualsRelation othRel)
                                throws IllegalStateException

Return a relation that union of the this and the given relation. This is the union of the sets of associations.

Throws:

IllegalStateException

See Also:

difference(org.jmlspecs.models.JMLEqualsToEqualsRelation), intersection(org.jmlspecs.models.JMLEqualsToEqualsRelation)

intersection

public JMLEqualsToEqualsRelation intersection(JMLEqualsToEqualsRelation othRel)

Return a relation that is the intersection of this and the given relation. This is the intersection of the sets of associations.

See Also:

difference(org.jmlspecs.models.JMLEqualsToEqualsRelation), union(org.jmlspecs.models.JMLEqualsToEqualsRelation)

difference

public JMLEqualsToEqualsRelation difference(JMLEqualsToEqualsRelation othRel)

Return a relation that is the difference between this and the given relation. This is the difference between the sets of associations.

See Also:

difference(org.jmlspecs.models.JMLEqualsToEqualsRelation), intersection(org.jmlspecs.models.JMLEqualsToEqualsRelation)

restrictDomainTo

public JMLEqualsToEqualsRelation restrictDomainTo(JMLEqualsSet dom)

Return a relation that is like this relation except that its domain is limited to just the elements of the given set.

See Also:

restrictRangeTo(org.jmlspecs.models.JMLEqualsSet)

restrictRangeTo

public JMLEqualsToEqualsRelation restrictRangeTo(JMLEqualsSet rng)

Return a relation that is like this relation except that its range is limited to just the elements of the given set.

See Also:

restrictDomainTo(org.jmlspecs.models.JMLEqualsSet)

toString

public String toString()

Return a string representation of this object.

Overrides:

toString in class Object

associations

public JMLEqualsToEqualsRelationEnumerator associations()

Return a enumerator for the set of associations that conceptually make up this relation.

See Also:

elements(), iterator(), toSet(), imagePairs()

elements

public JMLEqualsToEqualsRelationEnumerator elements()

Return a enumerator for the set of associations that conceptually make up this relation. This is a synonym for associations.

See Also:

associations(), iterator()

iterator

public JMLIterator iterator()

Returns an Iterator over the set of pairs conceptually contained in this relation..

Specified by:

iterator in interface JMLCollection

See Also:

associations(), elements()

toSet

public JMLValueSet toSet()

Return the set of all associations in this relation.

See Also:

associations(), toBag(), toSequence()

toBag

public JMLValueBag toBag()

Return the bag of all associations in this relation.

See Also:

toSet(), toSequence()

toSequence

public JMLValueSequence toSequence()

Return a sequence containing all associations in this relation.

See Also:

toSet(), toBag()

imagePairSet

public JMLValueSet imagePairSet()

Return the set of image set pairs that make up this relation.

See Also:

imagePairs(), toSet()

imagePairs

public JMLEqualsToEqualsRelationImageEnumerator imagePairs()

Return the set of domain image set pairs that make up this relation.

See Also:

imagePairSet(), associations(), toSet()

domainElements

public JMLEqualsSetEnumerator domainElements()

Return a enumerator for the set that is the domain of this relation.

See Also:

domain(), rangeElements()

rangeElements

public JMLEqualsSetEnumerator rangeElements()

Return a enumerator for the set that is the range of this relation. (This was formerly called "elements").

See Also:

range(), domainElements()

int_size

public int int_size()

Return the number of associations in this relation.

Specified by:

int_size in interface JMLCollection

toFunction

public JMLEqualsToEqualsMap toFunction()

Return a map that is contained in this relation. If this relation is a function, then this method can be seen as a type conversion which does not make a change to the abstract value. However, if this relation is not a function, then this method chooses a function contained in this relation from among the possibilities available.

See Also:

isaFunction(), JMLEqualsToEqualsMap