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/**
 * Copyright (C) 2016 Hurence ([email protected])
 *
 * 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 com.hurence.logisland.sampling;

public class SamplerFactory {

    /**
     * Instanciates a sampler.
     *
     * @param algorithm the sampling algorithm
     * @param valueFieldName the name of the field containing the point value (Y)
     * @param timeFieldName the name of the field containing the point time (X)
     * @param parameter an int parameter
     * @return the sampler
     */
    public static Sampler getSampler(SamplingAlgorithm algorithm,
                                     String valueFieldName,
                                     String timeFieldName,
                                     int parameter) {

        switch (algorithm) {
            case LTTB:
                return new LTTBSampler(valueFieldName, timeFieldName, parameter);
            case FIRST_ITEM:
                return new FirstItemSampler(valueFieldName, timeFieldName, parameter);
            case AVERAGE:
                return new AverageSampler(valueFieldName, timeFieldName, parameter);
            case MIN_MAX:
                return new MinMaxSampler(valueFieldName, timeFieldName, parameter);
            case MODE_MEDIAN:
                return new ModeMedianSampler(valueFieldName, timeFieldName, parameter);
            case NONE:
            default:
                return new IsoSampler();
        }
    }
}