/// <summary>Take the fields of the index and take value from the query</summary>
/// <param name="ci">The class info involved</param>
/// <param name="index">The index</param>
/// <param name="query"></param>
/// <returns>The key of the index</returns>
public static NeoDatis.Tool.Wrappers.OdbComparable ComputeKey(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo
ci, NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex index, NeoDatis.Odb.Impl.Core.Query.Criteria.CriteriaQuery
query)
{
string[] attributesNames = ci.GetAttributeNames(index.GetAttributeIds());
NeoDatis.Odb.Core.Layers.Layer2.Meta.AttributeValuesMap values = query.GetCriteria
().GetValues();
return(BuildIndexKey(index.GetName(), values, attributesNames));
}
public virtual string GetDetails()
{
System.Text.StringBuilder buffer = new System.Text.StringBuilder();
if (classInfoIndex == null)
{
buffer.Append("No index used, Execution time=").Append(GetDuration()).Append("ms"
);
return(buffer.ToString());
}
return(buffer.Append("Following indexes have been used : ").Append(classInfoIndex
.GetName()).Append(", Execution time=").Append(GetDuration()).Append("ms").ToString
());
}
/// <summary>Execute query using index</summary>
/// <param name="index"></param>
/// <param name="inMemory"></param>
/// <param name="startIndex"></param>
/// <param name="endIndex"></param>
/// <param name="returnObjects"></param>
/// <returns></returns>
/// <exception cref="System.Exception">System.Exception</exception>
private NeoDatis.Odb.Objects <T> ExecuteUsingIndex <T>(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex
index, bool inMemory, int startIndex, int endIndex, bool returnObjects, NeoDatis.Odb.Core.Query.Execution.IMatchingObjectAction
queryResultAction)
{
// Index that have not been used yet do not have persister!
if (index.GetBTree().GetPersister() == null)
{
index.GetBTree().SetPersister(new NeoDatis.Odb.Impl.Core.Btree.LazyODBBTreePersister
(storageEngine));
}
bool objectMatches = false;
long nbObjects = classInfo.GetNumberOfObjects();
long btreeSize = index.GetBTree().GetSize();
// the two values should be equal
if (nbObjects != btreeSize)
{
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo ci = storageEngine.GetSession(true
).GetMetaModel().GetClassInfoFromId(index.GetClassInfoId());
throw new NeoDatis.Odb.ODBRuntimeException(NeoDatis.Odb.Core.NeoDatisError.IndexIsCorrupted
.AddParameter(index.GetName()).AddParameter(ci.GetFullClassName()).AddParameter(
nbObjects).AddParameter(btreeSize));
}
if (NeoDatis.Odb.OdbConfiguration.IsDebugEnabled(LogId))
{
NeoDatis.Tool.DLogger.Debug("loading " + nbObjects + " instance(s) of " + classInfo
.GetFullClassName());
}
if (ExecuteStartAndEndOfQueryAction())
{
queryResultAction.Start();
}
PrepareQuery();
if (query != null)
{
queryHasOrderBy = query.HasOrderBy();
}
NeoDatis.Btree.IBTree tree = index.GetBTree();
bool isUnique = index.IsUnique();
// Iterator iterator = new BTreeIterator(tree,
// OrderByConstants.ORDER_BY_ASC);
System.IComparable key = ComputeIndexKey(classInfo, index);
System.Collections.IList list = null;
// If index is unique, get the object
if (isUnique)
{
NeoDatis.Btree.IBTreeSingleValuePerKey treeSingle = (NeoDatis.Btree.IBTreeSingleValuePerKey
)tree;
object o = treeSingle.Search(key);
if (o != null)
{
list = new System.Collections.ArrayList();
list.Add(o);
}
}
else
{
NeoDatis.Btree.IBTreeMultipleValuesPerKey treeMultiple = (NeoDatis.Btree.IBTreeMultipleValuesPerKey
)tree;
list = treeMultiple.Search(key);
}
if (list != null)
{
System.Collections.IEnumerator iterator = list.GetEnumerator();
while (iterator.MoveNext())
{
NeoDatis.Odb.OID oid = (NeoDatis.Odb.OID)iterator.Current;
// FIXME Why calling this method
long position = objectReader.GetObjectPositionFromItsOid(oid, true, true);
orderByKey = null;
objectMatches = MatchObjectWithOid(oid, returnObjects, inMemory);
if (objectMatches)
{
queryResultAction.ObjectMatch(oid, GetCurrentObjectMetaRepresentation(), orderByKey
);
}
}
queryResultAction.End();
return(queryResultAction.GetObjects <T>());
}
if (ExecuteStartAndEndOfQueryAction())
{
queryResultAction.End();
}
return(queryResultAction.GetObjects <T>());
}