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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.
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/**
 * Copyright (c), Data Geekery GmbH, contact@datageekery.com
 *
 * 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 org.jooq.lambda;

import java.util.Comparator;
import java.util.Optional;
import java.util.function.Function;

A specification for a Window. 
Author:
Lukas Eder/**
 * A specification for a {@link Window}.
 *
 * @author Lukas Eder
 */
public interface WindowSpecification<T> {
      
    
The window partition function.
/**
     * The window partition function.
     */
    Function<? super T, ?> partition();
    
    
The window order.
/**
     * The window order.
     */
    Optional<Comparator<? super T>> order();
    
    
The window's lower frame bound.
/**
     * The window's lower frame bound.
     */
    long lower();
    
    
The window's upper frame bound.
/**
     * The window's upper frame bound.
     */
    long upper();
}