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.
/**
 * 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;

Author:
Lukas Eder/**
 * @author Lukas Eder
 */
class WindowSpecificationImpl<T> implements WindowSpecification<T> {

    private final Function<? super T, ?> partition;
    private final Comparator<? super T> order;
    private final long lower;
    private final long upper;

    WindowSpecificationImpl(Function<? super T, ?> partition, Comparator<? super T> order, long lower, long upper) {
        this.partition = partition;
        this.order = order;
        this.lower = lower;
        this.upper = upper;
    }
    
    @Override
    public Function<? super T, ?> partition() {
        return partition;
    }

    @Override
    public Optional<Comparator<? super T>> order() {
        return Optional.ofNullable(order);
    }

    @Override
    public long lower() {
        return lower;
    }

    @Override
    public long upper() {
        return upper;
    }
}