/*@ also
@ public normal_behavior
@ requires obj != null && obj instanceof JMLEqualsToEqualsRelation;
@ ensures \result ==
@ this.theRelation.equals(
@ ((JMLEqualsToEqualsRelation)obj).theRelation);
@ also
@ public normal_behavior
@ requires obj == null
@ || !(obj instanceof JMLEqualsToEqualsRelation);
@ ensures !\result;
@*/
public boolean equals(/*@ nullable @*/ Object obj) {
if (obj == null || !(obj instanceof JMLEqualsToEqualsRelation)) {
return false;
}
JMLEqualsToEqualsRelation rel = (JMLEqualsToEqualsRelation) obj;
if (size_ != rel.int_size()) {
return false;
}
JMLEqualsToEqualsRelationImageEnumerator imagePairEnum = this.imagePairs();
JMLEqualsValuePair imagePair;
JMLEqualsSet img;
while (imagePairEnum.hasMoreElements()) {
imagePair = imagePairEnum.nextImagePair();
// @ assume imagePair.value != null;
// @ assume imagePair.value instanceof JMLEqualsSet;
img = (JMLEqualsSet) imagePair.value;
if (!img.equals(rel.elementImage(imagePair.key))) {
return false;
}
}
return true;
}
/*@ public normal_behavior
@ ensures (\forall JMLEqualsEqualsPair pair; ;
@ \result.theRelation.has(pair)
@ == elementImage(pair.value).has(pair.key));
@*/
public /*@ non_null @*/ JMLEqualsToEqualsRelation inverse() {
JMLEqualsToEqualsRelation invRel = new JMLEqualsToEqualsRelation();
JMLEqualsToEqualsRelationEnumerator assocEnum = this.associations();
JMLEqualsEqualsPair pair;
while (assocEnum.hasMoreElements()) {
pair = assocEnum.nextPair();
invRel = invRel.add(pair.value, pair.key);
}
return invRel;
} // @ nowarn Exception;
/*@ public normal_behavior
@ requires othRel != null;
@ requires int_size()
@ < Integer.MAX_VALUE - othRel.difference(this).int_size();
@ ensures \result.theRelation.equals(
@ this.theRelation.union(othRel.theRelation));
@*/
public /*@ non_null @*/ JMLEqualsToEqualsRelation union(
/*@ non_null @*/ JMLEqualsToEqualsRelation othRel) throws IllegalStateException {
JMLValueSet newImagePairSet = new JMLValueSet();
JMLEqualsSet newDom = domain_;
int newSize = 0;
JMLEqualsToEqualsRelationImageEnumerator imagePairEnum = this.imagePairs();
JMLEqualsValuePair imagePair;
JMLEqualsSet img;
while (imagePairEnum.hasMoreElements()) {
imagePair = imagePairEnum.nextImagePair();
// @ assume imagePair.value != null;
// @ assume imagePair.value instanceof JMLEqualsSet;
img = (JMLEqualsSet) imagePair.value;
img = img.union(othRel.elementImage(imagePair.key));
newImagePairSet = newImagePairSet.insert(new JMLEqualsValuePair(imagePair.key, img));
int size_inc = img.int_size();
if (newSize <= Integer.MAX_VALUE - size_inc) {
newSize = newSize + size_inc;
} else {
throw new IllegalStateException(TOO_BIG_TO_UNION);
}
}
JMLEqualsSet diffDom = othRel.domain().difference(this.domain_);
imagePairEnum = othRel.imagePairs();
while (imagePairEnum.hasMoreElements()) {
imagePair = imagePairEnum.nextImagePair();
// @ assume imagePair.value != null;
// @ assume imagePair.value instanceof JMLEqualsSet;
if (diffDom.has(imagePair.key)) {
newImagePairSet = newImagePairSet.insert(imagePair);
newDom = newDom.insert(imagePair.key);
// @ assume imagePair.value != null;
// @ assume imagePair.value instanceof JMLEqualsSet;
img = (JMLEqualsSet) imagePair.value;
int size_inc = img.int_size();
if (newSize <= Integer.MAX_VALUE - size_inc) {
newSize = newSize + size_inc;
} else {
throw new IllegalStateException(TOO_BIG_TO_UNION);
}
}
}
return new JMLEqualsToEqualsRelation(newImagePairSet, newDom, newSize);
}
/*@ public normal_behavior
@ requires othRel != null;
@ ensures \result.theRelation.equals(
@ this.theRelation.difference(othRel.theRelation));
@*/
public /*@ non_null @*/ JMLEqualsToEqualsRelation difference(
/*@ non_null @*/ JMLEqualsToEqualsRelation othRel) {
JMLValueSet newImagePairSet = new JMLValueSet();
JMLEqualsSet newDom = new JMLEqualsSet();
int newSize = 0;
JMLEqualsToEqualsRelationImageEnumerator imagePairEnum = this.imagePairs();
JMLEqualsValuePair imagePair;
JMLEqualsSet img;
while (imagePairEnum.hasMoreElements()) {
imagePair = imagePairEnum.nextImagePair();
// @ assume imagePair.value != null;
// @ assume imagePair.value instanceof JMLEqualsSet;
img = (JMLEqualsSet) imagePair.value;
img = img.difference(othRel.elementImage(imagePair.key));
if (!img.isEmpty()) {
newImagePairSet = newImagePairSet.insert(new JMLEqualsValuePair(imagePair.key, img));
newDom = newDom.insert(imagePair.key);
newSize = newSize + img.int_size();
}
}
return new JMLEqualsToEqualsRelation(newImagePairSet, newDom, newSize);
} // @ nowarn Exception;
