package org.apache.torque.util.functions;
/*
* 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.
*/
import org.apache.torque.Column;
import org.apache.torque.ColumnImpl;
/**
* SQL99 Standard max function.
*
* @version $Id: Max.java 1448414 2013-02-20 21:06:35Z tfischer $
*/
public class Max extends AggregateFunction
{
/**
* Construct an MAX function class with the column to calculate the maximum
* from.
*
* @param column the Column to calculate the maximum from.
*/
public Max(Column column)
{
super("MAX", column, false);
}
/**
* Construct an MAX function class with an SQL expression to calculate
* the maximum from.
*
* @param sqlExpression the SQL expression to calculate the maximum from.
*/
public Max(String sqlExpression)
{
super("MAX", new ColumnImpl(sqlExpression), false);
}
/**
* Construct an MAX function class with the column to calculate
* the maximum from and possibly a distinct modifier.
*
* @param column the Column to calculate the maximum from.
* @param distinct whether to calculate the maximum from only
* distinct values.
*/
public Max(Column column, boolean distinct)
{
super("MAX", column, distinct);
}
/**
* This method cannot be called, an UnsupportedOperationException
* will always be thrown.
*
* @param function disregarded.
*
* @throws UnsupportedOperationException always.
*/
@Override
public void setFunction(String function)
{
throw new UnsupportedOperationException(
"The function name may not be changed.");
}
}