org.jembi.rhea.orchestration.QueryPatientGetListOfOpenEMPIPersonIds.java Source code

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Here is the source code for org.jembi.rhea.orchestration.QueryPatientGetListOfOpenEMPIPersonIds.java

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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.jembi.rhea.orchestration;

import java.io.StringReader;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.mule.api.MuleEventContext;
import org.mule.api.MuleMessage;
import org.mule.api.lifecycle.Callable;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXParseException;

public class QueryPatientGetListOfOpenEMPIPersonIds implements Callable {

    Log log = LogFactory.getLog(this.getClass());

    @Override
    public Object onCall(MuleEventContext eventContext) throws Exception {
        MuleMessage msg = eventContext.getMessage();

        String openempiPeopleXml = (String) msg.getPayloadAsString();

        try {
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            Document document = dbf.newDocumentBuilder()
                    .parse(new InputSource(new StringReader(openempiPeopleXml)));

            XPathFactory xpf = XPathFactory.newInstance();
            XPath xpath = xpf.newXPath();

            XPathExpression expression = xpath.compile("/people/person/personId");
            NodeList patientIdNodeList = (NodeList) expression.evaluate(document, XPathConstants.NODESET);

            String idListStr = "";
            for (int i = 0; i < patientIdNodeList.getLength(); i++) {
                Node node = patientIdNodeList.item(i);
                String id = node.getTextContent();
                if (idListStr.isEmpty()) {
                    //idListStr = id;
                    idListStr = "personId=" + id;
                } else {
                    //idListStr += "," + id;
                    idListStr += "&personId=" + id;
                }
            }

            msg.setOutboundProperty("idList", idListStr);

        } catch (SAXParseException s) {
            throw new InvalidOpenEMPIResponseException("Empty or invalid response from OpenEMPI");
        }

        return msg;
    }

    public static class InvalidOpenEMPIResponseException extends Exception {
        private static final long serialVersionUID = 1L;

        public InvalidOpenEMPIResponseException() {
            super();
        }

        public InvalidOpenEMPIResponseException(String msg) {
            super(msg);
        }

        public InvalidOpenEMPIResponseException(Throwable t) {
            super(t);
        }
    }

}