/*
* 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.couchbase;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.teiid.core.types.BlobImpl;
import org.teiid.core.types.BlobType;
import org.teiid.core.types.InputStreamFactory;
import org.teiid.couchbase.CouchbaseConnection;
import org.teiid.language.Argument;
import org.teiid.language.Command;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.metadata.RuntimeMetadata;
import org.teiid.translator.DataNotAvailableException;
import org.teiid.translator.ExecutionContext;
import org.teiid.translator.ProcedureExecution;
import org.teiid.translator.TranslatorException;
import com.couchbase.client.java.query.N1qlQueryRow;
public class CouchbaseDirectQueryExecution extends CouchbaseExecution implements ProcedureExecution {
private List<Argument> arguments;
private Iterator<N1qlQueryRow> results;
public CouchbaseDirectQueryExecution(List<Argument> arguments, Command command, CouchbaseExecutionFactory executionFactory, ExecutionContext executionContext, RuntimeMetadata metadata, CouchbaseConnection connection) {
super(executionFactory, executionContext, metadata, connection);
this.arguments = arguments;
}
@Override
public void execute() throws TranslatorException {
String n1ql = (String)this.arguments.get(0).getArgumentValue().getValue();
LogManager.logDetail(LogConstants.CTX_CONNECTOR, CouchbasePlugin.Util.gs(CouchbasePlugin.Event.TEIID29001, n1ql));
executionContext.logCommand(n1ql);
this.results = connection.execute(n1ql).iterator();
}
@Override
public List<?> next() throws TranslatorException, DataNotAvailableException {
ArrayList<Object[]> returns = new ArrayList<>(1);
ArrayList<Object> result = new ArrayList<>(1);
if(this.results != null && this.results.hasNext()) {
final N1qlQueryRow row = this.results.next();
InputStreamFactory isf = new InputStreamFactory() {
@Override
public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(row.byteValue());
}
};
result.add(new BlobType(new BlobImpl(isf)));
returns.add(result.toArray());
return returns;
} else {
return null;
}
}
@Override
public void close() {
results = null;
}
@Override
public void cancel() throws TranslatorException {
close();
}
@Override
public List<?> getOutputParameterValues() throws TranslatorException {
return null;
}
}