org.openmrs.module.clinicalsummary.rule.pediatric.AgeWithUnitRule.java Source code

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Here is the source code for org.openmrs.module.clinicalsummary.rule.pediatric.AgeWithUnitRule.java

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/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */

package org.openmrs.module.clinicalsummary.rule.pediatric;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.Patient;
import org.openmrs.api.context.Context;
import org.openmrs.logic.LogicContext;
import org.openmrs.logic.LogicException;
import org.openmrs.logic.result.Result;
import org.openmrs.module.clinicalsummary.rule.EvaluableRule;

/**
 * No parameter needed
 */
public class AgeWithUnitRule extends EvaluableRule {

    private static final Log log = LogFactory.getLog(AgeWithUnitRule.class);

    public static final String TOKEN = "Age With Unit";

    public static final String REFERENCE_DATE = "reference.date";

    /**
     * @see org.openmrs.logic.Rule#eval(org.openmrs.logic.LogicContext, Integer, java.util.Map)
     */
    @Override
    protected Result evaluate(final LogicContext context, final Integer patientId,
            final Map<String, Object> parameters) throws LogicException {

        // just make sure that this is the patient from the database
        Patient patient = Context.getPatientService().getPatient(patientId);
        Date birthdate = patient.getBirthdate();

        if (log.isDebugEnabled())
            log.debug("Patient: " + patient.getPatientId() + ", birthdate: " + birthdate);

        Result ageResult = new Result();

        if (birthdate != null) {

            Calendar todayCalendar = Calendar.getInstance();
            Date referenceDate = (Date) parameters.get(REFERENCE_DATE);
            if (referenceDate != null)
                todayCalendar.setTime(referenceDate);

            Calendar birthCalendar = Calendar.getInstance();
            birthCalendar.setTime(birthdate);

            int birthYear = birthCalendar.get(Calendar.YEAR);
            int todayYear = todayCalendar.get(Calendar.YEAR);

            int ageInYear = todayYear - birthYear;

            int birthMonth = birthCalendar.get(Calendar.MONTH);
            int todayMonth = todayCalendar.get(Calendar.MONTH);

            int ageInMonth = todayMonth - birthMonth;
            if (ageInMonth < 0) {
                // birth month is bigger, the decrease the year
                ageInYear--;
                ageInMonth = 12 - birthMonth + todayMonth;
            }

            int birthDay = birthCalendar.get(Calendar.DATE);
            int todayDay = todayCalendar.get(Calendar.DATE);

            int ageInDay = todayDay - birthDay;
            if (ageInDay < 0) {
                ageInMonth--;
                birthCalendar.add(Calendar.MONTH, -1);
                ageInDay = birthCalendar.getActualMaximum(Calendar.DATE) - birthDay + todayDay;

                if (ageInDay > birthCalendar.getActualMaximum(Calendar.DATE) / 2)
                    ageInMonth++;
            }

            if (ageInYear != 0)
                ageResult.add(new Result(ageInYear + " Years"));
            if (ageInMonth != 0)
                ageResult.add(new Result(ageInMonth + " Months"));

        }

        return ageResult;
    }

    /**
     * @see org.openmrs.logic.Rule#getDependencies()
     */
    @Override
    public String[] getDependencies() {
        return new String[] {};
    }

    /**
     * Get the token name of the rule that can be used to reference the rule from LogicService
     *
     * @return the token name
     */
    @Override
    protected String getEvaluableToken() {
        return TOKEN;
    }
}