/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tajo.engine.function.builtin;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tajo.catalog.Column;
import org.apache.tajo.engine.function.GeneralFunction;
import org.apache.tajo.datum.DatumFactory;
import org.apache.tajo.datum.Int8Datum;
import org.apache.tajo.storage.Tuple;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import static org.apache.tajo.common.TajoDataTypes.Type.TEXT;
public class Date extends GeneralFunction {
private final Log LOG = LogFactory.getLog(Date.class);
private final static String dateFormat = "dd/MM/yyyy HH:mm:ss";
public Date() {
super(new Column[] {new Column("val", TEXT)});
}
@Override
public Int8Datum eval(Tuple params) {
try {
return DatumFactory.createInt8(new SimpleDateFormat(dateFormat)
.parse(params.get(0).asChars()).getTime());
} catch (ParseException e) {
LOG.error(e);
return null;
}
}
}