/**
* DataCleaner (community edition)
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.datacleaner.beans.valuedist;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicInteger;
import javax.inject.Named;
import org.apache.metamodel.util.Month;
import org.datacleaner.api.Analyzer;
import org.datacleaner.api.Categorized;
import org.datacleaner.api.Concurrent;
import org.datacleaner.api.Configured;
import org.datacleaner.api.Description;
import org.datacleaner.api.Distributed;
import org.datacleaner.api.Initialize;
import org.datacleaner.api.InputColumn;
import org.datacleaner.api.InputRow;
import org.datacleaner.components.categories.DateAndTimeCategory;
import org.datacleaner.result.Crosstab;
import org.datacleaner.result.CrosstabDimension;
import org.datacleaner.result.CrosstabNavigator;
import org.datacleaner.result.CrosstabResult;
@Named("Month distribution")
@Description("Finds the distribution of months from Date values.")
@Concurrent(true)
@Categorized(DateAndTimeCategory.class)
@Distributed(reducer = MonthDistributionResultReducer.class)
public class MonthDistributionAnalyzer implements Analyzer<CrosstabResult> {
private final Map<InputColumn<Date>, ConcurrentMap<Integer, AtomicInteger>> distributionMap;
@Configured
InputColumn<Date>[] dateColumns;
public MonthDistributionAnalyzer() {
distributionMap = new HashMap<>();
}
@Initialize
public void init() {
for (final InputColumn<Date> col : dateColumns) {
final ConcurrentMap<Integer, AtomicInteger> countMap = new ConcurrentHashMap<>();
distributionMap.put(col, countMap);
}
}
@Override
public void run(final InputRow row, final int distinctCount) {
for (final InputColumn<Date> col : dateColumns) {
final Date value = row.getValue(col);
if (value != null) {
final Calendar c = Calendar.getInstance();
c.setTime(value);
final int monthConstant = c.get(Calendar.MONTH);
final ConcurrentMap<Integer, AtomicInteger> countMap = distributionMap.get(col);
final AtomicInteger previousCount =
countMap.putIfAbsent(monthConstant, new AtomicInteger(distinctCount));
if (previousCount != null) {
previousCount.addAndGet(distinctCount);
}
}
}
}
@Override
public CrosstabResult getResult() {
final CrosstabDimension columnDimension = new CrosstabDimension("Column");
final CrosstabDimension monthDimension = new CrosstabDimension("Month");
for (final Month month : Month.values()) {
final String monthName = toMonthName(month);
monthDimension.addCategory(monthName);
}
final Crosstab<Integer> crosstab = new Crosstab<>(Integer.class, columnDimension, monthDimension);
for (final InputColumn<Date> col : dateColumns) {
columnDimension.addCategory(col.getName());
final CrosstabNavigator<Integer> nav = crosstab.where(columnDimension, col.getName());
final Map<Integer, AtomicInteger> countMap = distributionMap.get(col);
for (final Entry<Integer, AtomicInteger> entry : countMap.entrySet()) {
final Integer monthConstant = entry.getKey();
final Month month = Month.getByCalendarConstant(monthConstant);
final AtomicInteger count = entry.getValue();
final String monthName = toMonthName(month);
nav.where(monthDimension, monthName).put(count.intValue());
}
}
return new CrosstabResult(crosstab);
}
private String toMonthName(final Month month) {
final String upperCaseMonthName = month.toString();
return upperCaseMonthName.charAt(0) + upperCaseMonthName.substring(1).toLowerCase();
}
// used only for unittesting
public void setDateColumns(final InputColumn<Date>[] dateColumns) {
this.dateColumns = dateColumns;
}
}