/*@ public normal_behavior
@ requires dv != null && rv != null;
@ ensures \result.theRelation.equals(
@ theRelation.remove(new JMLEqualsEqualsPair(dv, rv)));
@ also
@ requires dv == null || rv == null;
@ ensures \result != null && \result.equals(this);
@*/
public /*@ non_null @*/ JMLEqualsToEqualsRelation remove(Object dv, Object rv) {
if (!domain_.has(dv)) {
return (this);
}
// @ assume dv != null;
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;
int imgSize = img.int_size();
if (imagePair.keyEquals(dv)) {
img = img.remove(rv);
imgSize = img.int_size();
if (imgSize > 0) {
newImagePairSet = newImagePairSet.insert(new JMLEqualsValuePair(dv, img));
newSize = newSize + imgSize;
} else {
// @ assert imgSize == 0;
newDom = newDom.remove(dv);
}
} else {
newImagePairSet = newImagePairSet.insert(imagePair);
newSize = newSize + imgSize;
}
}
return new JMLEqualsToEqualsRelation(newImagePairSet, newDom, newSize);
} // @ nowarn Exception;
/*@ public normal_behavior
@ ensures \result != null
@ && (\forall Object val; domain().has(val);
@ (\forall Object r; r != null;
@ (elementImage(val).has(r)
@ <==> \result.theRelation
@ .has(new JMLEqualsEqualsPair(val,r))
@ && !val.equals(dv))));
@ implies_that
@ public normal_behavior
@ requires dv == null;
@ ensures \result != null && \result.equals(this);
@*/
public /*@ non_null @*/ JMLEqualsToEqualsRelation removeFromDomain(/*@ nullable @*/ Object dv) {
if (!domain_.has(dv)) {
return (this);
}
JMLValueSet newImagePairSet = new JMLValueSet();
JMLEqualsSet newDom = domain_.remove(dv);
int newSize = 0;
JMLEqualsToEqualsRelationImageEnumerator imagePairEnum = this.imagePairs();
JMLEqualsValuePair imagePair;
while (imagePairEnum.hasMoreElements()) {
imagePair = imagePairEnum.nextImagePair();
// @ assume imagePair.value != null;
// @ assume imagePair.value instanceof JMLEqualsSet;
if (!imagePair.keyEquals(dv)) {
newImagePairSet = newImagePairSet.insert(imagePair);
JMLEqualsSet img = (JMLEqualsSet) imagePair.value;
newSize = newSize + img.int_size();
}
}
return new JMLEqualsToEqualsRelation(newImagePairSet, newDom, newSize);
} // @ nowarn Exception;
