/*
* 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.Arrays;
import java.util.Date;
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.Command;
import org.teiid.language.Literal;
import org.teiid.language.visitor.SQLStringVisitor;
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 columnsAxis;
private int colWidth;
private ListIterator<Position> rowPositionIterator;
private String mdxQuery;
private boolean returnsArray;
public OlapQueryExecution(List<Argument> arguments, Command command, OlapConnection connection, ExecutionContext context, OlapExecutionFactory executionFactory, String mdxQuery, boolean returnsArray) {
this.mdxQuery = mdxQuery;
if (arguments.size() > 0 || !returnsArray) { //TODO this is a hack at backwards compatibility
StringBuilder buffer = new StringBuilder();
SQLStringVisitor.parseNativeQueryParts(mdxQuery, arguments, buffer, new SQLStringVisitor.Substitutor() {
@Override
public void substitute(Argument arg, StringBuilder builder, int index) {
Literal argumentValue = arg.getArgumentValue();
Object value = argumentValue.getValue();
if (value == null || value instanceof Number || value instanceof Boolean || value instanceof String) {
builder.append(argumentValue);
} else if (value instanceof Date) {
//bind as a string literal
builder.append(new Literal(value.toString(), String.class));
} else {
//bind as a string literal using the teiid format - this is likely not what the user wants
builder.append(new Literal(argumentValue.toString(), String.class));
}
}
});
this.mdxQuery = buffer.toString();
}
this.command = command;
this.connection = connection;
this.context = context;
this.executionFactory = executionFactory;
this.returnsArray = returnsArray;
}
@Override
public void execute() throws TranslatorException {
try {
stmt = this.connection.createStatement();
cellSet = stmt.executeOlapQuery(mdxQuery);
CellSetAxis rowAxis = this.cellSet.getAxes().get(Axis.ROWS.axisOrdinal());
rowPositionIterator = rowAxis.iterator();
columnsAxis = cellSet.getAxes().get(Axis.COLUMNS.axisOrdinal());
colWidth = rowAxis.getAxisMetaData().getHierarchies().size() + this.columnsAxis.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 (!rowPositionIterator.hasNext()) {
return null;
}
Position rowPosition = rowPositionIterator.next();
Object[] result = new Object[colWidth];
int i = 0;
// add in rows axis
List<Member> members = rowPosition.getMembers();
for (Member member:members) {
String columnName = member.getName();
result[i++] = columnName;
}
// add col axis
for (Position colPos : columnsAxis) {
Cell cell = cellSet.getCell(colPos, rowPosition);
result[i++] = cell.getValue();
}
if (returnsArray) {
ArrayList<Object[]> results = new ArrayList<Object[]>(1);
results.add(result);
return results;
}
return Arrays.asList(result);
}
@Override
public List<?> getOutputParameterValues() throws TranslatorException {
return null;
}
}