/*
* 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.jpa;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.Query;
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.metadata.RuntimeMetadata;
import org.teiid.translator.DataNotAvailableException;
import org.teiid.translator.ExecutionContext;
import org.teiid.translator.ProcedureExecution;
import org.teiid.translator.TranslatorException;
public class JPQLDirectQueryExecution extends JPQLBaseExecution implements ProcedureExecution{
private Iterator<?> resultsIterator;
private List<Argument> arguments;
private boolean returnsArray = true;
private String query;
@SuppressWarnings("unused")
public JPQLDirectQueryExecution(List<Argument> arguments, Command command, ExecutionContext executionContext, RuntimeMetadata metadata, EntityManager em, String query, boolean returnsArray) {
super(executionContext, metadata, em);
this.arguments = arguments;
this.returnsArray = returnsArray;
this.query = query;
}
@Override
public void execute() throws TranslatorException {
if (query.length() < 7) {
throw new TranslatorException(JPAPlugin.Util.gs(JPAPlugin.Event.TEIID14008));
}
String firstToken = query.substring(0, 7);
String jpql = query.substring(7);
LogManager.logTrace(LogConstants.CTX_CONNECTOR, "JPA Source-Query:", jpql); //$NON-NLS-1$
if (firstToken.equalsIgnoreCase("search;")) { // //$NON-NLS-1$
StringBuilder buffer = new StringBuilder();
SQLStringVisitor.parseNativeQueryParts(jpql, arguments, buffer, new SQLStringVisitor.Substitutor() {
@Override
public void substitute(Argument arg, StringBuilder builder, int index) {
Literal argumentValue = arg.getArgumentValue();
builder.append(argumentValue);
}
});
jpql = buffer.toString();
Query queryCommand = this.enityManager.createQuery(jpql);
List<?> results = queryCommand.getResultList();
this.resultsIterator = results.iterator();
}
else if (firstToken.equalsIgnoreCase("create;")) { // //$NON-NLS-1$
Object entity = arguments.get(0).getArgumentValue().getValue();
this.enityManager.merge(entity);
this.resultsIterator = Arrays.asList(1).iterator();
}
else if (firstToken.equalsIgnoreCase("update;") || firstToken.equalsIgnoreCase("delete;")) { // //$NON-NLS-1$ //$NON-NLS-2$
Query queryCmd = this.enityManager.createQuery(jpql);
this.resultsIterator = Arrays.asList(queryCmd.executeUpdate()).iterator();
} else {
throw new TranslatorException(JPAPlugin.Util.gs(JPAPlugin.Event.TEIID14008));
}
}
@Override
public List<?> next() throws TranslatorException, DataNotAvailableException {
if (this.resultsIterator != null && this.resultsIterator.hasNext()) {
Object obj = this.resultsIterator.next();
if (obj instanceof Object[]) {
if (returnsArray) {
return Arrays.asList(obj);
}
return Arrays.asList((Object[])obj);
}
if (returnsArray) {
return Arrays.asList((Object)new Object[] {obj});
}
return Arrays.asList(obj);
}
this.resultsIterator = null;
return null;
}
@Override
public void close() {
// no close
this.resultsIterator = null;
}
@Override
public void cancel() throws TranslatorException {
// no cancel
}
@Override
public List<?> getOutputParameterValues() throws TranslatorException {
return null;
}
}