org.openmrs.module.chica.rule.ChicaAgeRule.java Source code

Introduction

Here is the source code for org.openmrs.module.chica.rule.ChicaAgeRule.java

Source

/**
 * 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.chica.rule;

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

import org.apache.commons.lang3.StringUtils;
import org.openmrs.logic.LogicContext;
import org.openmrs.logic.LogicException;
import org.openmrs.logic.Rule;
import org.openmrs.logic.result.Result;
import org.openmrs.logic.result.Result.Datatype;
import org.openmrs.logic.rule.RuleParameterInfo;
import org.openmrs.module.chirdlutil.util.ChirdlUtilConstants;
import org.openmrs.module.chirdlutil.util.Util;
import org.openmrs.module.chirdlutilbackports.hibernateBeans.FormInstance;
import org.openmrs.module.chirdlutilbackports.hibernateBeans.PatientState;

/**
 * 
 * Calculates a person's age in years based from their date of birth to the
 * index date
 * 
 */
public class ChicaAgeRule implements Rule {

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

        Date birthdate = context.read(patientId, context.getLogicDataSource("person"), "BIRTHDATE").toDatetime();

        if (birthdate == null) {
            return Result.emptyResult();
        }
        int age = 0;
        Calendar bdate = Calendar.getInstance();
        bdate.setTime(birthdate);

        Calendar now = Calendar.getInstance();
        now.setTime(context.getIndexDate());

        Date ageEndDate = now.getTime();

        // calculate age as the difference in what the parameter says.
        if (parameters != null) {
            //if the ChicaAgeRule was called by the PWS, then use the printed timestamp
            //not the current time
            FormInstance formInstance = (FormInstance) parameters.get("formInstance");
            Integer formId = null;
            if (formInstance != null) {
                formId = formInstance.getFormId();
            }

            String formType = null;
            Integer locationTagId = (Integer) parameters.get(ChirdlUtilConstants.PARAMETER_LOCATION_TAG_ID);
            if (formId != null && locationTagId != null) {
                formType = org.openmrs.module.chirdlutil.util.Util.getFormType(formId, locationTagId,
                        formInstance.getLocationId());
            }

            if (ChirdlUtilConstants.PHYSICIAN_FORM_TYPE.equalsIgnoreCase(formType)) {

                PatientState patientState = org.openmrs.module.atd.util.Util
                        .getProducePatientStateByFormInstanceAction(formInstance);

                if (patientState != null) {
                    Date formPrintedTime = patientState.getStartTime();

                    if (formPrintedTime != null) {
                        ageEndDate = formPrintedTime;
                    }
                }
            }

            String units = null;

            String param = (String) parameters.get("param1");

            if (param.compareToIgnoreCase("years") == 0) {

                units = Util.YEAR_ABBR;
            } else if (param.compareToIgnoreCase("months") == 0) {

                units = Util.MONTH_ABBR;
            } else if (param.compareToIgnoreCase("days") == 0) {

                units = Util.DAY_ABBR;
            } else if (param.compareToIgnoreCase("weeks") == 0) {

                units = Util.WEEK_ABBR;
            }

            if (units != null) {
                age = org.openmrs.module.chirdlutil.util.Util.getAgeInUnits(birthdate, ageEndDate, units);
            }
        } else {
            return Result.emptyResult();
        }

        return new Result(age);

    }

    /**
     * @see org.openmrs.logic.rule.Rule#getParameterList()
     */
    public Set<RuleParameterInfo> getParameterList() {
        return null;
    }

    /**
     * @see org.openmrs.logic.rule.Rule#getDependencies()
     */
    public String[] getDependencies() {
        return new String[] { "%%patient.birthdate" };
    }

    /**
     * @see org.openmrs.logic.rule.Rule#getTTL()
     */
    public int getTTL() {
        return 60 * 60 * 24; // 1 day
    }

    /**
     * @see org.openmrs.logic.rule.Rule#getDatatype(String)
     */
    public Datatype getDefaultDatatype() {
        return Datatype.NUMERIC;
    }

}