/*
* Licensed to Crate.IO GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.operation.collect;
import io.crate.data.Input;
import io.crate.metadata.RowContextCollectorExpression;
import java.util.function.Function;
public interface CollectExpression<TRow, TReturnValue> extends Input<TReturnValue> {
void setNextRow(TRow row);
static <TRow, TReturnValue> CollectExpression<TRow, TReturnValue> of(Function<TRow, TReturnValue> valueExtractor) {
return new RowContextCollectorExpression<TRow, TReturnValue>() {
@Override
public TReturnValue value() {
return valueExtractor.apply(row);
}
};
}
}