/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.translator.olap;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;
import org.olap4j.Axis;
import org.olap4j.Cell;
import org.olap4j.CellSet;
import org.olap4j.CellSetAxis;
import org.olap4j.OlapConnection;
import org.olap4j.OlapStatement;
import org.olap4j.Position;
import org.olap4j.metadata.Member;
import org.teiid.language.Argument;
import org.teiid.language.Call;
import org.teiid.language.Command;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.translator.ExecutionContext;
import org.teiid.translator.ProcedureExecution;
import org.teiid.translator.TranslatorException;
/**
* Executes the given MDX and packs the results into an array
*/
public class OlapQueryExecution implements ProcedureExecution {
protected Command command;
protected OlapConnection connection;
protected ExecutionContext context;
protected OlapExecutionFactory executionFactory;
private OlapStatement stmt;
private CellSet cellSet;
private CellSetAxis cols;
private int colWidth;
private ListIterator<Position> iterator;
public OlapQueryExecution(Command command, OlapConnection connection, ExecutionContext context, OlapExecutionFactory executionFactory) {
this.command = command;
this.connection = connection;
this.context = context;
this.executionFactory = executionFactory;
}
@Override
public void execute() throws TranslatorException {
try {
Call procedure = (Call) this.command;
List<Argument> arguments = procedure.getArguments();
String mdxQuery = (String) arguments.get(0).getArgumentValue().getValue();
stmt = this.connection.createStatement();
cellSet = stmt.executeOlapQuery(mdxQuery);
CellSetAxis rows = this.cellSet.getAxes().get(Axis.ROWS.axisOrdinal());
iterator = rows.iterator();
cols = cellSet.getAxes().get(Axis.COLUMNS.axisOrdinal());
colWidth = rows.getAxisMetaData().getHierarchies().size() + this.cols.getPositions().size();
} catch (SQLException e) {
throw new TranslatorException(e);
}
}
@Override
public void cancel() throws TranslatorException {
try {
OlapStatement olapStatement = this.stmt;
if (olapStatement != null) {
olapStatement.cancel();
}
} catch (SQLException e) {
throw new TranslatorException(e);
}
}
@Override
public void close() {
try {
if (this.stmt != null) {
this.stmt.close();
this.stmt = null;
}
} catch (SQLException e) {
LogManager.logDetail(LogConstants.CTX_CONNECTOR, e, "Exception closing"); //$NON-NLS-1$
}
}
@Override
public List<?> next() throws TranslatorException {
if (!iterator.hasNext()) {
return null;
}
Position nextRow = iterator.next();
Object[] result = new Object[colWidth];
int i = 0;
// add in rows axis
List<Member> members = nextRow.getMembers();
for (Member member:members) {
String columnName = member.getHierarchy().getName();
result[i++] = columnName;
}
// add col axis
for (Position colPos : cols) {
Cell cell = cellSet.getCell(colPos, nextRow);
result[i++] = cell.getValue();
}
ArrayList<Object[]> results = new ArrayList<Object[]>();
results.add(result);
return results;
}
@Override
public List<?> getOutputParameterValues() throws TranslatorException {
return null;
}
}