/*
 * 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;

import org.apache.jmeter.report.core.Sample;
import org.apache.jmeter.report.core.SampleComparator;
import org.apache.jmeter.report.core.SampleException;
import org.apache.jmeter.report.core.SampleMetadata;

/**
 * @since 2.14
 */
public class FieldSampleComparator implements SampleComparator {
    private static final String METADATA_EXCEPTION_MSG_FMT = "No <%s> data found in sample metadata <%s>";

    private int index;

    private final String fieldName;

    public FieldSampleComparator(String fieldName) {
        this.fieldName = fieldName;
    }

    @Override
    public final void initialize(SampleMetadata metadata) {
        index = metadata.indexOf(fieldName);
        if (index < 0) {
            throw new SampleException(String.format(METADATA_EXCEPTION_MSG_FMT,
                    fieldName, metadata));
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.apache.jmeter.report.csv.core.SampleComparator#compare(org.apache
     * .jmeter.report.csv.core.Sample, org.apache.jmeter.report.csv.core.Sample)
     */
    @Override
    public long compare(Sample s1, Sample s2) {
        return s1.getLong(index) - s2.getLong(index);
    }
}

/*
 * 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;

import org.apache.jmeter.report.core.Sample;
import org.apache.jmeter.report.core.SampleComparator;
import org.apache.jmeter.report.core.SampleException;
import org.apache.jmeter.report.core.SampleMetadata;

/**
 * @since 2.14
 */
public class FieldSampleComparator implements SampleComparator {
    private static final String METADATA_EXCEPTION_MSG_FMT = "No <%s> data found in sample metadata <%s>";

    private int index;

    private final String fieldName;

    public FieldSampleComparator(String fieldName) {
        this.fieldName = fieldName;
    }

    @Override
    public final void initialize(SampleMetadata metadata) {
        index = metadata.indexOf(fieldName);
        if (index < 0) {
            throw new SampleException(String.format(METADATA_EXCEPTION_MSG_FMT,
                    fieldName, metadata));
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.apache.jmeter.report.csv.core.SampleComparator#compare(org.apache
     * .jmeter.report.csv.core.Sample, org.apache.jmeter.report.csv.core.Sample)
     */
    @Override
    public long compare(Sample s1, Sample s2) {
        return Long.compare(s1.getLong(index), s2.getLong(index));
    }
}

Use Long.compare