com.treasure_data.td_import.model.TimeColumnSampling Maven / Gradle / Ivy

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Treasure Data Import Tool in Java.
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//
// Treasure Data Bulk-Import Tool in Java
//
// Copyright (C) 2012 - 2013 Muga Nishizawa
//
//    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.treasure_data.td_import.model;

import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Date;

public class TimeColumnSampling extends ColumnSampling {
    public static final String HHmmss = "HH:mm:ss";

    private static final SimpleDateFormat yyyyMMdd_SDF;
    private static final SimpleDateFormat yyyyMMdd$1HHmmss_SDF;
    private static final SimpleDateFormat yyyyMMdd$1HHmmssZ_SDF;
    public static final SimpleDateFormat HHmmss_SDF;
    public static final SimpleDateFormat yyyyMMdd_HHmmss_SDF; //2013/10/25 22:49:52
    public static final SimpleDateFormat yyyyMMdd_HHmmssZ_SDF; //2013/10/25 22:49:52 +0900

    private static final SimpleDateFormat[] SDF_LIST;
    private static final Object SDF_LIST_LOCK = new Object();

    static {
        yyyyMMdd_SDF = new SimpleDateFormat("yyyyMMdd");
        yyyyMMdd_SDF.setLenient(false);
        yyyyMMdd$1HHmmss_SDF = new SimpleDateFormat("yyyyMMdd$1HHmmss");
        yyyyMMdd$1HHmmss_SDF.setLenient(false);
        yyyyMMdd$1HHmmssZ_SDF = new SimpleDateFormat("yyyyMMdd$1HHmmss Z");
        yyyyMMdd$1HHmmssZ_SDF.setLenient(false);
        HHmmss_SDF = new SimpleDateFormat(HHmmss);
        HHmmss_SDF.setLenient(false);
        yyyyMMdd_HHmmss_SDF = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        yyyyMMdd_HHmmss_SDF.setLenient(false);
        yyyyMMdd_HHmmssZ_SDF = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss Z");
        yyyyMMdd_HHmmssZ_SDF.setLenient(false);

        SDF_LIST = new SimpleDateFormat[] {
                yyyyMMdd_SDF,
                yyyyMMdd$1HHmmss_SDF,
                yyyyMMdd$1HHmmssZ_SDF,
                HHmmss_SDF,
                yyyyMMdd_HHmmss_SDF,
                yyyyMMdd_HHmmssZ_SDF,
        };
    }

    private static final String yyyyMMdd_STRF = "%Y%m%d";
    private static final String yyyyMMdd$1HHmmss_STRF = "%Y%m%d$1%H%M%S";
    private static final String yyyyMMdd$1HHmmssZ_STRF = "%Y%m%d$1%H%M%S %Z";
    public static final String HHmmss_STRF = "%T";
    public static final String yyyyMMdd_HHmmss_STRF = "%Y/%m/%d %T";
    public static final String yyyyMMdd_HHmmssZ_STRF = "%Y/%m/%d %T %Z";

    private static final String[] STRF_LIST = new String[] {
        yyyyMMdd_STRF,
        yyyyMMdd$1HHmmss_STRF,
        yyyyMMdd$1HHmmssZ_STRF,
        HHmmss_STRF,
        yyyyMMdd_HHmmss_STRF,
        yyyyMMdd_HHmmssZ_STRF,
    };

    protected int[] timeScores = new int[] { 0, 0, 0, 0, 0, 0 };

    public TimeColumnSampling(int numRows) {
        super(numRows);
    }

    @Override
    public void parse(String value) {
        super.parse(value);

        if (value == null) {
            // any score are not changed
            return;
        }

        for (int i = 0; i < timeScores.length; i++) {
            synchronized (SDF_LIST_LOCK) {
                ParsePosition pp = new ParsePosition(0);
                Date d = SDF_LIST[i].parse(value, pp);
                if (d != null && pp.getErrorIndex() == -1) {
                    timeScores[i] += 1;
                }
            }
        }
    }

    public ColumnType getColumnTypeRank() {
        return super.getRank();
    }

    public String getSTRFTimeFormatRank() {
        int max = -numRows;
        int maxIndex = 0;
        for (int i = 0; i < timeScores.length; i++) {
            if (max <= timeScores[i]) {
                max = timeScores[i];
                maxIndex = i;
            }
        }

        if (max == 0) {
            return null;
        } else {
            return STRF_LIST[maxIndex];
        }
    }

}