/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hp.hpl.jena.sdb.layout2.index;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.sdb.StoreDesc;
import com.hp.hpl.jena.sdb.compiler.QueryCompilerFactory;
import com.hp.hpl.jena.sdb.layout2.NodeLayout2;
import com.hp.hpl.jena.sdb.layout2.StoreBase;
import com.hp.hpl.jena.sdb.layout2.TableDescQuads;
import com.hp.hpl.jena.sdb.layout2.TableDescTriples;
import com.hp.hpl.jena.sdb.sql.RS;
import com.hp.hpl.jena.sdb.sql.ResultSetJDBC;
import com.hp.hpl.jena.sdb.sql.SDBConnection;
import com.hp.hpl.jena.sdb.sql.SDBExceptionSQL;
import com.hp.hpl.jena.sdb.store.SQLBridgeFactory;
import com.hp.hpl.jena.sdb.store.SQLGenerator;
import com.hp.hpl.jena.sdb.store.StoreFormatter;
import com.hp.hpl.jena.sdb.store.StoreLoader;
public class StoreBaseIndex extends StoreBase
{
public StoreBaseIndex(SDBConnection connection, StoreDesc desc, StoreFormatter formatter, StoreLoader loader, QueryCompilerFactory compilerF, SQLBridgeFactory sqlBridgeF, SQLGenerator sqlGenerator)
{
super(connection, desc,
formatter, loader, compilerF, sqlBridgeF, sqlGenerator,
new TableDescTriples(),
new TableDescQuads(),
new TableNodesIndex()) ;
}
@Override
public long getSize(Node node)
{
return getSize(getConnection(), getQuadTableDesc(), node) ;
}
public static long getSize(SDBConnection connection, TableDescQuads tableDescQuads, Node node)
{
String lex = NodeLayout2.nodeToLex(node);
int typeId = NodeLayout2.nodeToType(node);
String lang = "";
String datatype = "";
if (node.isLiteral())
{
lang = node.getLiteralLanguage();
datatype = node.getLiteralDatatypeURI();
if (datatype == null)
datatype = "";
}
ResultSetJDBC rsx = null ;
long hash = NodeLayout2.hash(lex, lang, datatype, typeId) ;
try
{
rsx = connection.exec("SELECT id FROM Nodes WHERE hash = " + hash) ;
ResultSet res = rsx.get() ;
int id = -1 ;
if (res.next())
id = res.getInt(1) ;
else
// no graph, size == 0
return 0 ;
rsx.close();
rsx = connection.exec("SELECT COUNT(*) FROM " + tableDescQuads.getTableName() + " WHERE g = " + id) ;
res = rsx.get() ;
res.next() ;
long result = res.getLong(1) ;
return result ;
} catch (SQLException e)
{
throw new SDBExceptionSQL("Failed to get graph size", e) ;
} finally
{
RS.close(rsx) ;
}
}
}