internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
if(ChildPredicate!=null)
ChildPredicate.Execute(queryContext, nextPredicate);
queryContext.Tree.Reduce();
CacheEntry entry = null;
decimal sum = 0;
if (queryContext.Tree.LeftList.Count > 0)
{
foreach (string key in queryContext.Tree.LeftList)
{
object attribValue = queryContext.Index.GetAttributeValue(key, AttributeName);
if (attribValue != null)
{
Type type = attribValue.GetType();
if ((type == typeof(bool)) || (type == typeof(DateTime)) || (type == typeof(string)) || (type == typeof(char)))
throw new Exception("SUM can only be applied to integral data types.");
sum += Convert.ToDecimal(attribValue);
}
}
base.SetResult(queryContext, AggregateFunctionType.SUM, Decimal.Round(sum, 4));
}
else
{
base.SetResult(queryContext, AggregateFunctionType.SUM, null);
}
}
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
if (typename == "*")
throw new ParserException("Incorrect query format. \'*\' is not supported.");
if (queryContext.IndexManager == null)
throw new TypeIndexNotDefined("Index is not defined for '" + typename.ToString() + "'");
queryContext.TypeName = typename;
if (queryContext.Index == null) //try to get virtual index
{
//in case of DisableException is true, exception will not be thrown, and return new attribute index.
if (QueryIndexManager.DisableException)
{
queryContext.Index = new AttributeIndex(null, queryContext.Cache.Context.CacheRoot.Name, null);
return;
}
throw new TypeIndexNotDefined("Index is not defined for '" + typename.ToString() + "'");
}
else
{
//populate the tree for normal queries...
if (nextPredicate == null && queryContext.PopulateTree)
{
queryContext.Tree.Populate(queryContext.Index.GetEnumerator(typename));
}
else
{
nextPredicate.Execute(queryContext, null);
}
}
}
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
bool sortAscending = true;
bool normalizePredicates = true;
if (Inverse)
sortAscending = false;
SortedList list = new SortedList(new QueryResultComparer(sortAscending));
for (int i = 0; i < members.Count; i++)
{
Predicate predicate = (Predicate)members[i];
bool isOfTypePredicate = predicate is IsOfTypePredicate;
if (isOfTypePredicate)
{
predicate.Execute(queryContext, (Predicate)members[++i]);
normalizePredicates = false;
}
else
{
predicate.ExecuteInternal(queryContext, ref list);
}
}
if (normalizePredicates)
{
if (Inverse)
queryContext.Tree.RightList = GetUnion(list);
else
queryContext.Tree.RightList = GetIntersection(list);
}
}
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
if(ChildPredicate!=null)
ChildPredicate.Execute(queryContext, nextPredicate);
queryContext.Tree.Reduce();
decimal count = queryContext.Tree.LeftList.Count;
base.SetResult(queryContext, AggregateFunctionType.COUNT, count);
}
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
if(ChildPredicate!=null)
ChildPredicate.Execute(queryContext, nextPredicate);
queryContext.Tree.Reduce();
CacheEntry entry = null;
IComparable max = null;
bool initialized = false;
Type type = null;
foreach (string key in queryContext.Tree.LeftList)
{
CacheEntry cacheentry = queryContext.Cache.GetEntryInternal(key, false);
IComparable current = (IComparable)queryContext.Index.GetAttributeValue(key, AttributeName, cacheentry.IndexInfo);
if (current != null)
{
type = current.GetType();
if (type == typeof(bool))
throw new Exception("MAX cannot be applied to Boolean data type.");
if (!initialized)
{
max = current;
initialized = true;
}
if (current.CompareTo(max) > 0)
max = current;
}
}
if (type != null)
{
if ((type != typeof(DateTime)) && (type != typeof(string)) && (type != typeof(char)))
{
if (max != null)
{
base.SetResult(queryContext, AggregateFunctionType.MAX, Convert.ToDecimal(max));
return;
}
}
}
base.SetResult(queryContext, AggregateFunctionType.MAX, max);
}
/// <summary>
/// See attribute-level indexes can't be used in this predicate.
/// </summary>
/// <param name="queryContext"></param>
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
ArrayList keyList = null;
pattern = (string)generator.Evaluate(((MemberFunction)functor).MemberName, queryContext.AttributeValues);
pattern = pattern.Trim('\'');
AttributeIndex index = queryContext.Index;
IIndexStore store = ((MemberFunction)functor).GetStore(index);
if (store != null)
{
if (Inverse)
keyList = store.GetData(pattern, ComparisonType.NOT_LIKE);
else
keyList = store.GetData(pattern, ComparisonType.LIKE);
if (keyList != null && keyList.Count > 0)
{
IEnumerator keyListEnum = keyList.GetEnumerator();
if (queryContext.PopulateTree)
{
queryContext.Tree.RightList = keyList;
queryContext.PopulateTree = false;
}
else
{
while (keyListEnum.MoveNext())
{
if (queryContext.Tree.LeftList.Contains(keyListEnum.Current))
queryContext.Tree.Shift(keyListEnum.Current);
}
}
}
}
else
{
throw new AttributeIndexNotDefined("Index is not defined for attribute '" + ((MemberFunction)functor).MemberName + "'");
}
}
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
if(ChildPredicate!=null)
ChildPredicate.Execute(queryContext, nextPredicate);
queryContext.Tree.Reduce();
CacheEntry entry = null;
decimal sum = 0;
if (queryContext.Tree.LeftList.Count > 0)
{
foreach (string key in queryContext.Tree.LeftList)
{
CacheEntry cacheentry = queryContext.Cache.GetEntryInternal(key, false);
object attribValue = queryContext.Index.GetAttributeValue(key, AttributeName, cacheentry.IndexInfo);
if (attribValue != null)
{
Type type = attribValue.GetType();
if ((type == typeof(bool)) || (type == typeof(DateTime)) || (type == typeof(string)) || (type == typeof(char)))
throw new Exception("AVG can only be applied to integral data types.");
sum += Convert.ToDecimal(attribValue);
}
}
AverageResult avgResult = new AverageResult();
avgResult.Sum = sum;
avgResult.Count = queryContext.Tree.LeftList.Count;
//put the count and the sum
base.SetResult(queryContext, AggregateFunctionType.AVG, avgResult);
}
else
{
base.SetResult(queryContext, AggregateFunctionType.AVG, null);
}
}
internal virtual IDictionary SearchEntriesInternal(Predicate pred, IDictionary values)
{
return null;
}
internal virtual QueryContext SearchInternal(Predicate pred, IDictionary values)
{
return null;
}
internal virtual void Execute(QueryContext queryContext, Predicate nextPredicate) { }
/// <summary>
/// /// returns the keylist fullfilling the specified criteria.
/// </summary>
/// <param name="queryString">a string describing the search criteria.</param>
/// <returns>a list of keys.</returns>
internal override QueryContext SearchInternal(Predicate pred, IDictionary values)
{
QueryContext queryContext = new QueryContext(this);
queryContext.AttributeValues = values;
queryContext.CacheContext = _context.CacheRoot.Name;
try
{
pred.Execute(queryContext, null);
return queryContext;
}
catch (Exception)
{
throw;
}
}
internal override QueryContext SearchInternal(Predicate pred, IDictionary values)
{
return null;
}
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
AttributeIndex index = queryContext.Index;
IIndexStore store = ((MemberFunction)functor).GetStore(index);
if (store != null)
{
members = queryContext.AttributeValues[((MemberFunction)functor).MemberName] as ArrayList;
if (members == null)
{
if (queryContext.AttributeValues.Count > 0)
{
members = new ArrayList();
members.Add(queryContext.AttributeValues[((MemberFunction)functor).MemberName]);
}
else
{
throw new Exception("Value(s) not specified for indexed attribute " + ((MemberFunction)functor).MemberName + ".");
}
}
ArrayList keyList = new ArrayList();
if (!Inverse)
{
ArrayList distinctMembers = new ArrayList();
for (int i = 0; i < members.Count; i++)
{
if (!distinctMembers.Contains(members[i]))
{
distinctMembers.Add(members[i]);
ArrayList temp = store.GetData(members[i], ComparisonType.EQUALS);
if (temp != null)
if (temp.Count > 0)
keyList.AddRange(temp);
}
}
}
else
{
ArrayList distinctMembers = new ArrayList();
ArrayList temp = store.GetData(members[0], ComparisonType.NOT_EQUALS);
if (temp != null)
{
if (temp.Count > 0)
{
for (int i = 0; i < members.Count; i++)
{
if (!distinctMembers.Contains(members[i]))
{
distinctMembers.Add(members[i]);
ArrayList extras = store.GetData(members[i], ComparisonType.EQUALS);
if (extras != null)
{
IEnumerator ie = extras.GetEnumerator();
if (ie != null)
{
while (ie.MoveNext())
{
if (temp.Contains(ie.Current))
temp.Remove(ie.Current);
}
}
}
}
keyList = temp;
}
}
}
}
if (keyList != null && keyList.Count > 0)
{
IEnumerator keyListEnum = keyList.GetEnumerator();
if (queryContext.PopulateTree)
{
queryContext.Tree.RightList = keyList;
queryContext.PopulateTree = false;
}
else
{
while (keyListEnum.MoveNext())
{
if (queryContext.Tree.LeftList.Contains(keyListEnum.Current))
queryContext.Tree.Shift(keyListEnum.Current);
}
}
}
}
else
{
throw new AttributeIndexNotDefined("Index is not defined for attribute '" + ((MemberFunction)functor).MemberName + "'");
}
}
internal override void Execute(QueryContext queryContext, Predicate nextPredicate)
{
throw new ParserException("Incorrect query format. \'" + this.ToString() + "\' not supported.");
}