/*
* 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.google;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.teiid.core.util.StringUtil;
import org.teiid.language.Argument;
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.DataNotAvailableException;
import org.teiid.translator.ExecutionContext;
import org.teiid.translator.ProcedureExecution;
import org.teiid.translator.TranslatorException;
import org.teiid.translator.google.api.GoogleSpreadsheetConnection;
import org.teiid.translator.google.api.result.SheetRow;
import org.teiid.translator.google.visitor.SpreadsheetSQLVisitor;
public class DirectSpreadsheetQueryExecution implements ProcedureExecution {
private static final String WORKSHEET = "worksheet"; //$NON-NLS-1$
private static final String QUERY = "query"; //$NON-NLS-1$
private static final String OFFEST = "offset"; //$NON-NLS-1$
private static final String LIMIT = "limit"; //$NON-NLS-1$
private GoogleSpreadsheetConnection connection;
private Iterator<SheetRow> rowIterator;
private ExecutionContext executionContext;
private List<Argument> arguments;
private String query;
private boolean returnsArray;
public DirectSpreadsheetQueryExecution(String query, List<Argument> arguments, ExecutionContext executionContext, GoogleSpreadsheetConnection connection, boolean returnsArray) {
this.executionContext = executionContext;
this.connection = connection;
this.arguments = arguments;
this.query = query;
this.returnsArray = returnsArray;
}
@Override
public void close() {
LogManager.logDetail(LogConstants.CTX_CONNECTOR, SpreadsheetExecutionFactory.UTIL.getString("close_query")); //$NON-NLS-1$
}
@Override
public void cancel() throws TranslatorException {
LogManager.logDetail(LogConstants.CTX_CONNECTOR, SpreadsheetExecutionFactory.UTIL.getString("cancel_query")); //$NON-NLS-1$
this.rowIterator = null;
}
@Override
public void execute() throws TranslatorException {
String worksheet = null;
Integer limit = null;
Integer offset = null;
String toQuery = query;
List<String> parts = StringUtil.tokenize(query, ';');
for (String var : parts) {
int index = var.indexOf('=');
if (index == -1) {
continue;
}
String key = var.substring(0, index).trim();
String value = var.substring(index+1).trim();
if (key.equalsIgnoreCase(WORKSHEET)) {
worksheet = value;
}
else if (key.equalsIgnoreCase(QUERY)) {
StringBuilder buffer = new StringBuilder();
SQLStringVisitor.parseNativeQueryParts(value, arguments, buffer, new SQLStringVisitor.Substitutor() {
@Override
public void substitute(Argument arg, StringBuilder builder, int index) {
Literal argumentValue = arg.getArgumentValue();
SpreadsheetSQLVisitor visitor = new SpreadsheetSQLVisitor(connection.getSpreadsheetInfo());
visitor.visit(argumentValue);
builder.append(visitor.getTranslatedSQL());
}
});
toQuery = buffer.toString();
}
else if (key.equalsIgnoreCase(LIMIT)) {
limit = Integer.parseInt(value);
}
else if (key.equalsIgnoreCase(OFFEST)) {
offset = Integer.parseInt(value);
}
}
this.rowIterator = this.connection.executeQuery(worksheet, toQuery, offset, limit, executionContext.getBatchSize()).iterator();
}
@Override
public List<?> next() throws TranslatorException, DataNotAvailableException {
if (this.rowIterator != null && this.rowIterator.hasNext()) {
List<?> result = rowIterator.next().getRow();
if (returnsArray) {
return Arrays.asList((Object)result.toArray());
}
return result;
}
this.rowIterator = null;
return null;
}
@Override
public List<?> getOutputParameterValues() throws TranslatorException {
return null;
}
}