org.flowable.engine.common.impl.calendar.DefaultBusinessCalendar Maven / Gradle / Ivy

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/* 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 org.flowable.engine.common.impl.calendar;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Map;

import org.flowable.engine.common.api.FlowableIllegalArgumentException;
import org.flowable.engine.common.impl.context.Context;

/**
 * @author Tom Baeyens
 */
public class DefaultBusinessCalendar implements BusinessCalendar {

    private static Map units = new HashMap<>();
    static {
        units.put("millis", Calendar.MILLISECOND);
        units.put("seconds", Calendar.SECOND);
        units.put("second", Calendar.SECOND);
        units.put("minute", Calendar.MINUTE);
        units.put("minutes", Calendar.MINUTE);
        units.put("hour", Calendar.HOUR);
        units.put("hours", Calendar.HOUR);
        units.put("day", Calendar.DAY_OF_YEAR);
        units.put("days", Calendar.DAY_OF_YEAR);
        units.put("week", Calendar.WEEK_OF_YEAR);
        units.put("weeks", Calendar.WEEK_OF_YEAR);
        units.put("month", Calendar.MONTH);
        units.put("months", Calendar.MONTH);
        units.put("year", Calendar.YEAR);
        units.put("years", Calendar.YEAR);
    }

    @Override
    public Date resolveDuedate(String duedateDescription, int maxIterations) {
        return resolveDuedate(duedateDescription);
    }

    @Override
    public Date resolveDuedate(String duedate) {
        Date resolvedDuedate = Context.getCommandContext().getCurrentEngineConfiguration().getClock().getCurrentTime(); 

        String[] tokens = duedate.split(" and ");
        for (String token : tokens) {
            resolvedDuedate = addSingleUnitQuantity(resolvedDuedate, token);
        }

        return resolvedDuedate;
    }

    @Override
    public Boolean validateDuedate(String duedateDescription, int maxIterations, Date endDate, Date newTimer) {
        return true;
    }

    @Override
    public Date resolveEndDate(String endDate) {
        return null;
    }

    protected Date addSingleUnitQuantity(Date startDate, String singleUnitQuantity) {
        int spaceIndex = singleUnitQuantity.indexOf(' ');
        if (spaceIndex == -1 || singleUnitQuantity.length() < spaceIndex + 1) {
            throw new FlowableIllegalArgumentException("invalid duedate format: " + singleUnitQuantity);
        }

        String quantityText = singleUnitQuantity.substring(0, spaceIndex);
        Integer quantity = new Integer(quantityText);

        String unitText = singleUnitQuantity.substring(spaceIndex + 1).trim().toLowerCase();

        int unit = units.get(unitText);

        GregorianCalendar calendar = new GregorianCalendar();
        calendar.setTime(startDate);
        calendar.add(unit, quantity);

        return calendar.getTime();
    }
}