/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
 *
 */

package org.apache.jmeter.report.processor.graph;

import org.apache.jmeter.control.TransactionController;
import org.apache.jmeter.report.core.Sample;
import org.apache.jmeter.samplers.SampleResult;

/**
 * The class CountValueSelector provides a projection to count samples.
 *
 * @since 3.0
 */
public class CountValueSelector extends AbstractGraphValueSelector {
    private static final Double ONE = 1.0d;
    private static final Double ZERO = 0.0d;

    /**
     *
     * @param ignoreTransactionController boolean ignore {@link SampleResult} generated by {@link TransactionController}
     */
    public CountValueSelector(boolean ignoreTransactionController) {
       super(ignoreTransactionController);
    }

    /**
     * @see GraphValueSelector#select(String, Sample)
     */
    @Override
    public Double select(String series, Sample sample) {
        if(isIgnoreTransactionController()) {
            if(!sample.isController()) {
                return ONE;
            }
        } else {
            if(!sample.isEmptyController()) {
                return ONE;
            }
        }
        return ZERO;
    }

}
