com.mysema.query.sql.WindowOver Maven / Gradle / Ivy
/*
* Copyright 2011, Mysema Ltd
*
* 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.mysema.query.sql;
import com.google.common.collect.ImmutableList;
import com.mysema.query.types.Expression;
import com.mysema.query.types.Operator;
import com.mysema.query.types.expr.SimpleOperation;
/**
* WindowOver is the first part of a WindowFunction construction
*
* @author tiwe
*
* @param
*/
public class WindowOver extends SimpleOperation {
private static final long serialVersionUID = 464583892898579544L;
public WindowOver(Class type, Operator op) {
super(type, op, ImmutableList.>of());
}
public WindowOver(Class type, Operator op, Expression arg) {
super(type, op, ImmutableList.>of(arg));
}
public WindowOver(Class type, Operator op, Expression arg1, Expression arg2) {
super(type, op, ImmutableList.>of(arg1, arg2));
}
/**
* @return
*/
public WindowFirstLast keepFirst() {
return new WindowFirstLast(this, true);
}
/**
* @return
*/
public WindowFirstLast keepLast() {
return new WindowFirstLast(this, false);
}
/**
* @return
*/
public WindowFunction over() {
return new WindowFunction(this);
}
}