/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* Licensed 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 com.querydsl.sql;
import com.google.common.collect.ImmutableList;
import com.querydsl.core.types.Expression;
import com.querydsl.core.types.Operator;
import com.querydsl.core.types.dsl.SimpleOperation;
/**
* {@code WindowOver} is the first part of a WindowFunction construction
*
* @author tiwe
*
* @param <T>
*/
public class WindowOver<T> extends SimpleOperation<T> {
private static final long serialVersionUID = 464583892898579544L;
public WindowOver(Class<? extends T> type, Operator op) {
super(type, op, ImmutableList.<Expression<?>>of());
}
public WindowOver(Class<? extends T> type, Operator op, Expression<?> arg) {
super(type, op, ImmutableList.<Expression<?>>of(arg));
}
public WindowOver(Class<? extends T> type, Operator op, Expression<?> arg1, Expression<?> arg2) {
super(type, op, ImmutableList.of(arg1, arg2));
}
public WindowFirstLast<T> keepFirst() {
return new WindowFirstLast<T>(this, true);
}
public WindowFirstLast<T> keepLast() {
return new WindowFirstLast<T>(this, false);
}
public WindowFunction<T> over() {
return new WindowFunction<T>(this);
}
}