/*
* Licensed to 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.metadata;
import io.crate.types.DataType;
import javax.annotation.Nullable;
import java.util.List;
/**
* A base class for implementing a function resolver which takes the signature operator as constructor argument.
*/
public abstract class BaseFunctionResolver implements FunctionResolver {
private final Signature.SignatureOperator signatureOperator;
protected BaseFunctionResolver(Signature.SignatureOperator signatureOperator) {
this.signatureOperator = signatureOperator;
}
@Nullable
@Override
public List<DataType> getSignature(List<DataType> dataTypes) {
return signatureOperator.apply(dataTypes);
}
}