org.apache.openjpa.jdbc.kernel.exps.CurrentDate Maven / Gradle / Ivy
/*
* 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.openjpa.jdbc.kernel.exps;
import java.sql.SQLException;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Date;
import org.apache.openjpa.jdbc.sql.Result;
import org.apache.openjpa.jdbc.sql.SQLBuffer;
import org.apache.openjpa.jdbc.sql.Select;
import org.apache.openjpa.util.InternalException;
/**
* A literal current DATE/TIME/TIMESTAMP value in a filter.
*
* @author Marc Prud'hommeaux
*/
class CurrentDate
extends Const {
private final Class _type;
public CurrentDate(Class type) {
_type = type;
}
public Class getType() {
return _type;
}
public void setImplicitType(Class type) {
}
public Object load(ExpContext ctx, ExpState state, Result res) throws SQLException {
if (Timestamp.class.isAssignableFrom(_type)) {
return res.getTimestamp(this, null);
} else if (Time.class.isAssignableFrom(_type)) {
return res.getTime(this, null);
} else if (Date.class.isAssignableFrom(_type)) {
return res.getDate(this, null);
} else {
throw new InternalException();
}
}
public Object getValue(Object[] params) {
try {
return _type.getConstructor(long.class).newInstance(System.currentTimeMillis());
} catch (Exception e) {
return new Date();
}
}
public void appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer sql, int index) {
if (Timestamp.class.isAssignableFrom(_type)) {
sql.append(ctx.store.getDBDictionary().currentTimestampFunction);
} else if (Time.class.isAssignableFrom(_type)) {
sql.append(ctx.store.getDBDictionary().currentTimeFunction);
} else if (Date.class.isAssignableFrom(_type)) {
sql.append(ctx.store.getDBDictionary().currentDateFunction);
} else {
throw new InternalException();
}
}
}