protected virtual void Init()
{
start = 0;
end = 0;
// for instance, only manage index for one field query using 'equal'
if (classInfo.HasIndex() && query.HasCriteria() && CanUseIndex(query.GetCriteria(
)))
{
NeoDatis.Tool.Wrappers.List.IOdbList <string> fields = query.GetAllInvolvedFields(
);
if (fields.IsEmpty())
{
useIndex = false;
}
else
{
int[] fieldIds = GetAllInvolvedFieldIds(fields);
classInfoIndex = classInfo.GetIndexForAttributeIds(fieldIds);
if (classInfoIndex != null)
{
useIndex = true;
}
}
}
// Keep the detail
details = GetDetails();
}
protected virtual void Init()
{
start = 0;
end = 0;
// for instance, only manage index for one field query using 'equal'
if (classInfo.HasIndex() && query.HasCriteria() && CanUseIndex(query.GetCriteria(
)))
{
NeoDatis.Tool.Wrappers.List.IOdbList<string> fields = query.GetAllInvolvedFields(
);
if (fields.IsEmpty())
{
useIndex = false;
}
else
{
int[] fieldIds = GetAllInvolvedFieldIds(fields);
classInfoIndex = classInfo.GetIndexForAttributeIds(fieldIds);
if (classInfoIndex != null)
{
useIndex = true;
}
}
}
// Keep the detail
details = GetDetails();
}
/// <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));
}
/// <summary>Used to rebuild an index</summary>
public virtual void RebuildIndex(string className, string indexName, bool verbose
)
{
if (verbose)
{
NeoDatis.Tool.DLogger.Info("Rebuilding index " + indexName + " on class " + className
);
}
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo classInfo = GetMetaModel().GetClassInfo
(className, true);
if (!classInfo.HasIndex(indexName))
{
throw new NeoDatis.Odb.ODBRuntimeException(NeoDatis.Odb.Core.NeoDatisError.IndexDoesNotExist
.AddParameter(indexName).AddParameter(className));
}
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex cii = classInfo.GetIndexWithName
(indexName);
DeleteIndex(className, indexName, verbose);
AddIndexOn(className, indexName, classInfo.GetAttributeNames(cii.GetAttributeIds(
)), verbose, !cii.IsUnique());
}
public virtual void DeleteIndex(string className, string indexName, bool verbose)
{
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo classInfo = GetMetaModel().GetClassInfo
(className, true);
if (!classInfo.HasIndex(indexName))
{
throw new NeoDatis.Odb.ODBRuntimeException(NeoDatis.Odb.Core.NeoDatisError.IndexDoesNotExist
.AddParameter(indexName).AddParameter(className));
}
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex cii = classInfo.GetIndexWithName
(indexName);
if (verbose)
{
NeoDatis.Tool.DLogger.Info("Deleting index " + indexName + " on class " + className
);
}
Delete(cii);
classInfo.RemoveIndex(cii);
if (verbose)
{
NeoDatis.Tool.DLogger.Info("Index " + indexName + " deleted");
}
}
public override System.IComparable ComputeIndexKey(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo
ci, NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex index)
{
return(null);
}
public override System.IComparable ComputeIndexKey(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo
ci, NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex index)
{
return(NeoDatis.Odb.Core.Query.Execution.IndexTool.ComputeKey(classInfo, index, (
NeoDatis.Odb.Impl.Core.Query.Criteria.CriteriaQuery)query));
}
public abstract System.IComparable ComputeIndexKey(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo
ci, NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex index);
/// <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>());
}
public virtual void AddIndexOn(string className, string indexName, string[] indexFields
, bool verbose, bool acceptMultipleValuesForSameKey)
{
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo classInfo = GetMetaModel().GetClassInfo
(className, true);
if (classInfo.HasIndex(indexName))
{
throw new NeoDatis.Odb.ODBRuntimeException(NeoDatis.Odb.Core.NeoDatisError.IndexAlreadyExist
.AddParameter(indexName).AddParameter(className));
}
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfoIndex cii = classInfo.AddIndexOn(indexName
, indexFields, acceptMultipleValuesForSameKey);
NeoDatis.Btree.IBTree btree = null;
if (acceptMultipleValuesForSameKey)
{
btree = new NeoDatis.Odb.Impl.Core.Btree.ODBBTreeMultiple(className, NeoDatis.Odb.OdbConfiguration
.GetDefaultIndexBTreeDegree(), new NeoDatis.Odb.Impl.Core.Btree.LazyODBBTreePersister
(this));
}
else
{
btree = new NeoDatis.Odb.Impl.Core.Btree.ODBBTreeSingle(className, NeoDatis.Odb.OdbConfiguration
.GetDefaultIndexBTreeDegree(), new NeoDatis.Odb.Impl.Core.Btree.LazyODBBTreePersister
(this));
}
cii.SetBTree(btree);
Store(cii);
// Now The index must be updated with all existing objects.
if (classInfo.GetNumberOfObjects() == 0)
{
// There are no objects. Nothing to do
return;
}
if (verbose)
{
NeoDatis.Tool.DLogger.Info("Creating index " + indexName + " on class " + className
+ " - Class has already " + classInfo.GetNumberOfObjects() + " Objects. Updating index"
);
}
if (verbose)
{
NeoDatis.Tool.DLogger.Info(indexName + " : loading " + classInfo.GetNumberOfObjects
() + " objects from database");
}
// We must load all objects and insert them in the index!
NeoDatis.Odb.Objects <object> objects = GetObjectInfos <object>(new NeoDatis.Odb.Impl.Core.Query.Criteria.CriteriaQuery
(className), false, -1, -1, false);
if (verbose)
{
NeoDatis.Tool.DLogger.Info(indexName + " : " + classInfo.GetNumberOfObjects() + " objects loaded"
);
}
NeoDatis.Odb.Core.Layers.Layer2.Meta.NonNativeObjectInfo nnoi = null;
int i = 0;
bool monitorMemory = NeoDatis.Odb.OdbConfiguration.IsMonitoringMemory();
while (objects.HasNext())
{
nnoi = (NeoDatis.Odb.Core.Layers.Layer2.Meta.NonNativeObjectInfo)objects.Next();
btree.Insert(cii.ComputeKey(nnoi), nnoi.GetOid());
if (verbose && i % 1000 == 0)
{
if (monitorMemory)
{
NeoDatis.Odb.Impl.Tool.MemoryMonitor.DisplayCurrentMemory("Index " + indexName +
" " + i + " objects inserted", true);
}
}
i++;
}
if (verbose)
{
NeoDatis.Tool.DLogger.Info(indexName + " created!");
}
}
