/*
* 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.simpledb;
import org.teiid.language.Command;
import org.teiid.language.Delete;
import org.teiid.translator.DataNotAvailableException;
import org.teiid.translator.TranslatorException;
import org.teiid.translator.UpdateExecution;
import org.teiid.translator.simpledb.api.SimpleDBConnection;
public class SimpleDBDeleteExecute implements UpdateExecution {
private SimpleDBConnection connection;
private int updatedCount=0;
private SimpleDBDeleteVisitor visitor;
public SimpleDBDeleteExecute(Command command, SimpleDBConnection connection) throws TranslatorException {
this.connection = connection;
this.visitor = new SimpleDBDeleteVisitor((Delete)command);
this.visitor.checkExceptions();
}
public void execute() throws TranslatorException {
String domainName = SimpleDBMetadataProcessor.getName(this.visitor.getTable());
if (this.visitor.getCriteria() != null) {
this.updatedCount = this.connection.performDelete(domainName, buildSelect());
}
else {
// this is domain delete. otherwise this could be lot of items. deleted count can
// not be measured.
this.connection.deleteDomain(domainName);
}
}
private String buildSelect() {
StringBuilder sb = new StringBuilder();
sb.append("SELECT ").append(SimpleDBMetadataProcessor.ITEM_NAME); //$NON-NLS-1$
sb.append(" FROM ").append(SimpleDBMetadataProcessor.getName(this.visitor.getTable())); //$NON-NLS-1$
sb.append(" WHERE ").append(this.visitor.getCriteria()); //$NON-NLS-1$
return sb.toString();
}
@Override
public int[] getUpdateCounts() throws DataNotAvailableException, TranslatorException {
return new int[] { updatedCount };
}
@Override
public void close() {
}
@Override
public void cancel() throws TranslatorException {
}
}