SizeEstimatorFactory.java

/*
 * Licensed to CRATE Technology 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.breaker;

import io.crate.types.DataType;
import io.crate.types.FixedWidthType;
import io.crate.types.IpType;
import io.crate.types.StringType;

import java.util.Locale;

public class SizeEstimatorFactory {

    @SuppressWarnings("unchecked")
    public static <T> SizeEstimator<T> create(DataType type) {
        switch (type.id()) {
            case StringType.ID:
            case IpType.ID:
                return (SizeEstimator<T>) new BytesRefSizeEstimator();
            default:
                if (type instanceof FixedWidthType) {
                    return (SizeEstimator<T>) new ConstSizeEstimator(((FixedWidthType) type).fixedSize());
                }
                throw new UnsupportedOperationException(String.format(Locale.ENGLISH, "Cannot get SizeEstimator for type %s", type));
        }
    }
}