public virtual void Test1()
{
DeleteBase("btree45.ndb");
var odb = Open("btree45.ndb");
var storageEngine = ((global::NDatabase.Odb)odb).GetStorageEngine();
var persister = new LazyOdbBtreePersister(storageEngine);
IBTreeMultipleValuesPerKey tree = new OdbBtreeMultiple(3, persister);
tree.Insert(1, new MyObject("Value 1"));
tree.Insert(20, new MyObject("Value 20"));
tree.Insert(25, new MyObject("Value 25"));
tree.Insert(29, new MyObject("Value 29"));
tree.Insert(21, new MyObject("Value 21"));
AssertEquals(5, tree.GetRoot().GetNbKeys());
AssertEquals(0, tree.GetRoot().GetNbChildren());
AssertEquals(21, tree.GetRoot().GetMedian().GetKey());
var values = tree.GetRoot().GetMedian().GetValue() as List <object>;
AssertEquals("Value 21", values[0].ToString());
AssertEquals(0, tree.GetRoot().GetNbChildren());
tree.Insert(45, new MyObject("Value 45"));
AssertEquals(2, tree.GetRoot().GetNbChildren());
AssertEquals(1, tree.GetRoot().GetNbKeys());
AssertEquals(21, tree.GetRoot().GetKeyAt(0));
var valuesAsObjectAt = tree.GetRoot().GetValueAsObjectAt(0) as List <object>;
AssertEquals("Value 21", valuesAsObjectAt[0].ToString());
persister.Close();
odb = Open("btree45.ndb");
storageEngine = ((global::NDatabase.Odb)odb).GetStorageEngine();
persister = new LazyOdbBtreePersister(storageEngine);
tree = (IBTreeMultipleValuesPerKey)persister.LoadBTree(tree.GetId());
AssertEquals(6, tree.GetSize());
// println(tree.getRoot());
var o = (MyObject)tree.Search(20)[0];
AssertEquals("Value 20", o.GetName());
o = (MyObject)tree.Search(29)[0];
AssertEquals("Value 29", o.GetName());
o = (MyObject)tree.Search(45)[0];
AssertEquals("Value 45", o.GetName());
odb.Close();
DeleteBase("btree45.ndb");
}
public void AddIndexOn(string className, string indexName, string[] indexFields,
bool acceptMultipleValuesForSameKey)
{
var classInfo = GetMetaModel().GetClassInfo(className, true);
if (classInfo.HasIndex(indexName))
{
throw new OdbRuntimeException(
NDatabaseError.IndexAlreadyExist.AddParameter(indexName).AddParameter(className));
}
var classInfoIndex = classInfo.AddIndexOn(indexName, indexFields, acceptMultipleValuesForSameKey);
IBTree btree;
var lazyOdbBtreePersister = new LazyOdbBtreePersister(this);
if (acceptMultipleValuesForSameKey)
{
btree = new OdbBtreeMultiple(OdbConfiguration.GetIndexBTreeDegree(), lazyOdbBtreePersister);
}
else
{
btree = new OdbBtreeSingle(OdbConfiguration.GetIndexBTreeDegree(), lazyOdbBtreePersister);
}
classInfoIndex.BTree = btree;
Store(classInfoIndex);
// Now The index must be updated with all existing objects.
if (classInfo.NumberOfObjects == 0)
{
// There are no objects. Nothing to do
return;
}
var numberOfObjectsAsString = classInfo.NumberOfObjects.ToString();
Log4NetHelper.Instance.LogInfoMessage(
string.Format(
"StorageEngine: Creating index {0} on class {1} - Class has already {2} Objects. Updating index",
indexName, className, numberOfObjectsAsString));
Log4NetHelper.Instance.LogInfoMessage(string.Format("StorageEngine: {0} : loading {1} objects from database", indexName,
numberOfObjectsAsString));
// We must load all objects and insert them in the index!
var criteriaQuery = new SodaQuery(classInfo.UnderlyingType);
var objects = GetObjectInfos(criteriaQuery);
numberOfObjectsAsString = classInfo.NumberOfObjects.ToString();
Log4NetHelper.Instance.LogInfoMessage(string.Format("StorageEngine: {0} : {1} objects loaded", indexName, numberOfObjectsAsString));
while (objects.HasNext())
{
var nnoi = (NonNativeObjectInfo)objects.Next();
var odbComparable = IndexTool.BuildIndexKey(classInfoIndex.Name, nnoi, classInfoIndex.AttributeIds);
btree.Insert(odbComparable, nnoi.GetOid());
}
Log4NetHelper.Instance.LogInfoMessage(string.Format("StorageEngine: {0} created!", indexName));
}
