public static BaseFilter operator |(BaseFilter lbq, BaseFilter rbq)
{
var q = new BaseFilter();
var bq = new BoolBaseFilterDescriptor();
bq._ShouldFilters = new[] { lbq, rbq };
q.BoolBaseFilterDescriptor = bq;
return q;
}
public static BaseFilter operator !(BaseFilter lbq)
{
var f = new BaseFilter();
var fq = new BoolBaseFilterDescriptor();
fq._MustNotFilters = new[] { lbq };
f.BoolFilterDescriptor = fq;
return f;
}
public static BaseFilter operator !(BaseFilter lbq)
{
if (lbq == null || lbq.IsConditionless)
return new BaseFilter { IsConditionless = true };
var f = new BaseFilter();
var fq = new BoolBaseFilterDescriptor();
fq._MustNotFilters = new[] { lbq };
f.BoolFilterDescriptor = fq;
return f;
}
/// <summary>
/// AND's two BaseFilters
/// </summary>
/// <returns>A new basefilter that represents the AND of the two</returns>
public static BaseFilter operator &(BaseFilter leftFilter, BaseFilter rightFilter)
{
var defaultFilter = new BaseFilter() { IsConditionless = true };
leftFilter = leftFilter ?? defaultFilter;
rightFilter = rightFilter ?? defaultFilter;
var combined = new[] { leftFilter, rightFilter };
//if any of the queries is conditionless return the first one that is not
//or return the defaultQuery
if (combined.Any(bf => bf.IsConditionless))
return combined.FirstOrDefault(bf=>!bf.IsConditionless) ?? defaultFilter;
//return simple combination of the two if merging is not possible/necessary
var noMergeFilter = CombineIfNoMergeIsNecessary(leftFilter, rightFilter, combined);
if (noMergeFilter != null)
return noMergeFilter;
//if the left is a strict bool try to merge right on left first
var joinStrictLeft = StrictSingleSideAndMerge(leftFilter, rightFilter);
if (joinStrictLeft != null)
return joinStrictLeft;
// if the right side is a strict bool try to merge left on right
var joinStrictRight = StrictSingleSideAndMerge(rightFilter, leftFilter);
if (joinStrictRight != null)
return joinStrictRight;
// if the left side is a normal bool try to merge right on left
var joinLeft = SingleSideAndMerge(leftFilter, rightFilter);
if (joinLeft != null)
return joinLeft;
// if the right side is a normal bool try to merge lefft on right
var joinRight = SingleSideAndMerge(rightFilter, leftFilter);
return joinRight ?? defaultFilter;
}
private static void JoinShouldOnSide(BaseFilter lbq, BaseFilter rbq, BoolBaseFilterDescriptor bq)
{
bq._ShouldFilters = lbq.MergeShouldFilters(rbq);
}
public static BaseFilter operator |(BaseFilter lbq, BaseFilter rbq)
{
var f = new BaseFilter();
var fq = new BoolBaseFilterDescriptor();
fq._ShouldFilters = new[] { lbq, rbq };
f.BoolFilterDescriptor = fq;
if (lbq.BoolFilterDescriptor == null && rbq.BoolFilterDescriptor == null)
{
fq._ShouldFilters = lbq.MergeShouldFilters(rbq);
return f;
}
else if (lbq.BoolFilterDescriptor != null && rbq.BoolFilterDescriptor == null)
{
JoinShouldOnSide(lbq, rbq, fq);
}
else if (rbq.BoolFilterDescriptor != null && lbq.BoolFilterDescriptor == null)
{
JoinShouldOnSide(rbq, lbq, fq);
}
else
{
if (lbq.BoolFilterDescriptor.CanJoinShould() && rbq.BoolFilterDescriptor.CanJoinShould())
fq._ShouldFilters = lbq.MergeShouldFilters(rbq);
else
fq._ShouldFilters = new[] { lbq, rbq };
}
return f;
}
private static BaseFilter StrictSingleSideAndMerge(BaseFilter targetFilter, BaseFilter mergeFilter)
{
//if the target is not strict return
if (!targetFilter.IsStrict) return null;
var mergeBoolFilter = mergeFilter.BoolFilterDescriptor;
return CreateReturnFilter((returnFilter, returnBoolFilter) =>
{
if (mergeBoolFilter._MustNotFilters.HasAny())
{
returnBoolFilter._MustNotFilters = mergeBoolFilter._MustNotFilters;
mergeBoolFilter._MustNotFilters = null;
}
returnBoolFilter._MustFilters = new[] { targetFilter }.Concat(mergeBoolFilter._MustFilters ?? Empty);
});
}
private static BaseFilter SingleSideAndMerge(BaseFilter targetFilter, BaseFilter mergeFilter)
{
var targetBoolFilter = targetFilter.BoolFilterDescriptor;
var mergeBoolFilter = mergeFilter.BoolFilterDescriptor;
if (targetBoolFilter == null) return null;
var combined = new[] { targetFilter, mergeFilter };
return CreateReturnFilter((returnFilter, returnBoolFilter) =>
{
if (!targetBoolFilter.CanMergeMustAndMustNots() || !mergeBoolFilter.CanMergeMustAndMustNots())
{
returnBoolFilter._MustFilters = combined;
return;
}
returnBoolFilter._MustFilters = (targetBoolFilter._MustFilters ?? Empty)
.Concat(mergeBoolFilter != null
? (mergeBoolFilter._MustFilters ?? Empty)
: new[] {mergeFilter})
.NullIfEmpty();
returnBoolFilter._MustNotFilters = (targetBoolFilter._MustNotFilters ?? Empty)
.Concat(mergeBoolFilter != null
? (mergeBoolFilter._MustNotFilters ?? Empty)
: Empty
).NullIfEmpty();
});
}
internal static IEnumerable <BaseFilter> MergeMustNotFilters(this BaseFilter lbq, BaseFilter rbq)
{
var lBoolDescriptor = lbq.BoolFilterDescriptor;
var lHasMustNotFilters = lBoolDescriptor != null &&
lBoolDescriptor._MustNotFilters.HasAny();
var rBoolDescriptor = rbq.BoolFilterDescriptor;
var rHasMustNotFilters = rBoolDescriptor != null &&
rBoolDescriptor._MustNotFilters.HasAny();
var lq = lHasMustNotFilters ? lBoolDescriptor._MustNotFilters : Enumerable.Empty <BaseFilter>();
var rq = rHasMustNotFilters ? rBoolDescriptor._MustNotFilters : Enumerable.Empty <BaseFilter>();
if (!lq.HasAny() && !rq.HasAny())
{
return(null);
}
return(lq.Concat(rq));
}
public static BaseFilter operator |(BaseFilter leftFilter, BaseFilter rightFilter)
{
var defaultFilter = new BaseFilter() { IsConditionless = true };
leftFilter = leftFilter ?? defaultFilter;
rightFilter = rightFilter ?? defaultFilter;
var combined = new[] { leftFilter, rightFilter };
if (combined.Any(bf => bf.IsConditionless))
return combined.FirstOrDefault(bf => !bf.IsConditionless) ?? defaultFilter;
var leftBoolFilter = leftFilter.BoolFilterDescriptor;
var rightBoolFilter = rightFilter.BoolFilterDescriptor;
var f = new BaseFilter();
var fq = new BoolBaseFilterDescriptor();
fq._ShouldFilters = new[] { leftFilter, rightFilter };
f.BoolFilterDescriptor = fq;
//if neither the left nor the right side represent a bool filter join them
if (leftFilter.BoolFilterDescriptor == null && rightFilter.BoolFilterDescriptor == null)
{
fq._ShouldFilters = leftFilter.MergeShouldFilters(rightFilter);
return f;
}
//if the left or right sight already is a bool filter determine join the non bool query side of the
//of the operation onto the other.
if (leftFilter.BoolFilterDescriptor != null && rightFilter.BoolFilterDescriptor == null && !leftFilter.IsStrict)
{
JoinShouldOnSide(leftFilter, rightFilter, fq);
}
else if (rightFilter.BoolFilterDescriptor != null && leftFilter.BoolFilterDescriptor == null && !rightFilter.IsStrict)
{
JoinShouldOnSide(rightFilter, leftFilter, fq);
}
//both sides already represent a bool filter
else
{
//both sides report that we may merge the shoulds
if (!leftFilter.IsStrict && !rightFilter.IsStrict
&& leftBoolFilter.CanJoinShould()
&& rightBoolFilter.CanJoinShould())
fq._ShouldFilters = leftFilter.MergeShouldFilters(rightFilter);
else
//create a new nested bool with two separate should bool sections
fq._ShouldFilters = new[] { leftFilter, rightFilter };
}
return f;
}
public static BaseFilter CreateReturnFilter(Action<BaseFilter, BoolBaseFilterDescriptor> modify = null)
{
var returnFilter = new BaseFilter();
var returnBoolFilter = new BoolBaseFilterDescriptor() { };
returnFilter.BoolFilterDescriptor = returnBoolFilter;
if (modify != null)
{
modify(returnFilter, returnBoolFilter);
}
return returnFilter;
}
public static BaseFilter operator &(BaseFilter lbq, BaseFilter rbq)
{
var f = new BaseFilter();
var fq = new BoolBaseFilterDescriptor();
f.BoolFilterDescriptor = fq;
if (lbq.BoolFilterDescriptor == null && rbq.BoolFilterDescriptor == null)
{
fq._MustFilters = new[] { lbq, rbq };
return(f);
}
if (lbq.BoolFilterDescriptor != null && rbq.BoolFilterDescriptor != null)
{
if (lbq.BoolFilterDescriptor._HasOnlyMustNot() && rbq.BoolFilterDescriptor._HasOnlyMustNot())
{
fq._MustFilters = null;
fq._MustNotFilters = lbq.MergeMustNotFilters(rbq);
}
else if (lbq.BoolFilterDescriptor.CanJoinMust() && rbq.BoolFilterDescriptor.CanJoinMust())
{
fq._MustFilters = lbq.MergeMustFilters(rbq);
}
else
{
fq._MustFilters = new[] { lbq, rbq }
};
if (lbq.BoolFilterDescriptor.CanJoinMustNot() && rbq.BoolFilterDescriptor.CanJoinMustNot())
{
fq._MustNotFilters = lbq.MergeMustNotFilters(rbq);
}
return(f);
}
if (lbq.BoolFilterDescriptor != null)
{
if (lbq.BoolFilterDescriptor._HasOnlyMustNot())
{
fq._MustNotFilters = lbq.BoolFilterDescriptor._MustNotFilters;
fq._MustFilters = new[] { rbq };
return(f);
}
else if (lbq.BoolFilterDescriptor.CanJoinMust())
{
fq._MustFilters = lbq.MergeMustFilters(rbq);
}
else
{
fq._MustFilters = new[] { lbq, rbq }
};
if (lbq.BoolFilterDescriptor.CanJoinMustNot())
{
fq._MustNotFilters = lbq.MergeMustNotFilters(rbq);
}
return(f);
}
if (rbq.BoolFilterDescriptor._HasOnlyMustNot())
{
fq._MustNotFilters = rbq.BoolFilterDescriptor._MustNotFilters;
fq._MustFilters = new[] { lbq };
return(f);
}
if (rbq.BoolFilterDescriptor.CanJoinMust())
{
fq._MustFilters = rbq.MergeMustFilters(lbq);
}
else
{
fq._MustFilters = new[] { rbq, lbq }
};
if (rbq.BoolFilterDescriptor.CanJoinMustNot())
{
fq._MustNotFilters = rbq.MergeMustNotFilters(lbq);
}
return(f);
}
private static void JoinShouldOnSide(BaseFilter lbq, BaseFilter rbq, BoolBaseFilterDescriptor bq)
{
bq._ShouldFilters = lbq.MergeShouldFilters(rbq);
}
/// <summary>
/// Filter search
/// </summary>
public SearchDescriptor <T> Filter(BaseFilter filter)
{
filter.ThrowIfNull("filter");
this._Filter = filter;
return(this);
}
internal static IEnumerable <BaseFilter> MergeShouldFilters(this BaseFilter lbq, BaseFilter rbq)
{
var lBoolDescriptor = lbq.BoolFilterDescriptor;
var lHasShouldFilters = lBoolDescriptor != null &&
lBoolDescriptor._ShouldFilters.HasAny();
var rBoolDescriptor = rbq.BoolFilterDescriptor;
var rHasShouldFilters = rBoolDescriptor != null &&
rBoolDescriptor._ShouldFilters.HasAny();
var lq = lHasShouldFilters ? lBoolDescriptor._ShouldFilters : new[] { lbq };
var rq = rHasShouldFilters ? rBoolDescriptor._ShouldFilters : new[] { rbq };
return(lq.Concat(rq));
}
public static BaseFilter operator &(BaseFilter lbq, BaseFilter rbq)
{
var f = new BaseFilter();
var fq = new BoolBaseFilterDescriptor();
f.BoolFilterDescriptor = fq;
if (lbq.BoolFilterDescriptor == null && rbq.BoolFilterDescriptor == null)
{
fq._MustFilters = new[] { lbq, rbq };
return f;
}
if (lbq.BoolFilterDescriptor != null && rbq.BoolFilterDescriptor != null)
{
if (lbq.BoolFilterDescriptor._HasOnlyMustNot() && rbq.BoolFilterDescriptor._HasOnlyMustNot())
{
fq._MustFilters = null;
fq._MustNotFilters = lbq.MergeMustNotFilters(rbq);
}
else if (lbq.BoolFilterDescriptor.CanJoinMust() && rbq.BoolFilterDescriptor.CanJoinMust())
fq._MustFilters = lbq.MergeMustFilters(rbq);
else
fq._MustFilters = new[] { lbq, rbq };
if (lbq.BoolFilterDescriptor.CanJoinMustNot() && rbq.BoolFilterDescriptor.CanJoinMustNot())
fq._MustNotFilters = lbq.MergeMustNotFilters(rbq);
return f;
}
if (lbq.BoolFilterDescriptor != null)
{
if (lbq.BoolFilterDescriptor._HasOnlyMustNot())
{
fq._MustNotFilters = lbq.BoolFilterDescriptor._MustNotFilters;
fq._MustFilters = new[] { rbq };
return f;
}
else if (lbq.BoolFilterDescriptor.CanJoinMust())
fq._MustFilters = lbq.MergeMustFilters(rbq);
else
fq._MustFilters = new[] { lbq, rbq };
if (lbq.BoolFilterDescriptor.CanJoinMustNot())
fq._MustNotFilters = lbq.MergeMustNotFilters(rbq);
return f;
}
if (rbq.BoolFilterDescriptor._HasOnlyMustNot())
{
fq._MustNotFilters = rbq.BoolFilterDescriptor._MustNotFilters;
fq._MustFilters = new[] { lbq };
return f;
}
if (rbq.BoolFilterDescriptor.CanJoinMust())
fq._MustFilters = rbq.MergeMustFilters(lbq);
else
fq._MustFilters = new[] { rbq, lbq };
if (rbq.BoolFilterDescriptor.CanJoinMustNot())
fq._MustNotFilters = rbq.MergeMustNotFilters(lbq);
return f;
}
private static BaseFilter CombineIfNoMergeIsNecessary(
BaseFilter leftFilter,
BaseFilter rightFilter,
BaseFilter[] combined)
{
var leftBoolFilter = leftFilter.BoolFilterDescriptor;
var rightBoolFilter = rightFilter.BoolFilterDescriptor;
//if neither side is already a boolfilter
// or if all boolfilters are strict.
// or if one side is strict and the other is null
//no merging is needed just return the combination
if (
(leftBoolFilter == null && rightBoolFilter == null)
|| (leftFilter.IsStrict && rightFilter.IsStrict)
|| (leftFilter.IsStrict && rightBoolFilter == null)
|| (rightFilter.IsStrict && leftBoolFilter == null))
{
return CreateReturnFilter((returnFilter, returnBoolFilter) => returnBoolFilter._MustFilters = combined);
}
return null;
}