(Java) Create SOAP with multiple VeriFactu Digitally Signed Registration Records

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    success = true;

    // Begin with the following SOAP XML:

    // <?xml version="1.0" encoding="utf-8"?>
    // <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:sum="https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroLR.xsd" xmlns:sum1="https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroInformacion.xsd" xmlns:xd="http://www.w3.org/2000/09/xmldsig#">
    //     <soapenv:Header/>
    //     <soapenv:Body>
    //         <sum:RegFactuSistemaFacturacion>
    //             <sum:Cabecera>
    //                 <sum1:ObligadoEmision>
    //                     <sum1:NombreRazon>XYZ STORE SL</sum1:NombreRazon>
    //                     <sum1:NIF>B99999999</sum1:NIF>
    //                 </sum1:ObligadoEmision>
    //                 <sum1:RemisionRequerimiento>
    //                     <sum1:RefRequerimiento>3333333333</sum1:RefRequerimiento>
    //                     <sum1:FinRequerimiento>S</sum1:FinRequerimiento>
    //                 </sum1:RemisionRequerimiento>
    //             </sum:Cabecera>
    // 
    //         </sum:RegFactuSistemaFacturacion>
    //     </soapenv:Body>
    // </soapenv:Envelope>

    CkXml xml = new CkXml();
    xml.put_Tag("soapenv:Envelope");
    xml.AddAttribute("xmlns:soapenv","http://schemas.xmlsoap.org/soap/envelope/");
    xml.AddAttribute("xmlns:sum","https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroLR.xsd");
    xml.AddAttribute("xmlns:sum1","https://www2.agenciatributaria.gob.es/static_files/common/internet/dep/aplicaciones/es/aeat/tike/cont/ws/SuministroInformacion.xsd");
    xml.AddAttribute("xmlns:xd","http://www.w3.org/2000/09/xmldsig#");
    xml.UpdateChildContent("soapenv:Header","");
    xml.UpdateChildContent("soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:ObligadoEmision|sum1:NombreRazon","XYZ STORE SL");
    xml.UpdateChildContent("soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:ObligadoEmision|sum1:NIF","B99999999");
    xml.UpdateChildContent("soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:RemisionRequerimiento|sum1:RefRequerimiento","3333333333");
    xml.UpdateChildContent("soapenv:Body|sum:RegFactuSistemaFacturacion|sum:Cabecera|sum1:RemisionRequerimiento|sum1:FinRequerimiento","S");

    // Prior to this code, we created N signed SOAP messages, each containing a single signed record.
    // Load each of these signed SOAP messages into a StringBuilder and insert after the "</sum:Cabecera>"
    // Note: We must NOT use Chilkat.Xml for this.  We must do string operations using Chilkat StringBuilder to prevent whitespace or formatting modifications which would break the signatures.

    CkStringBuilder sbXml = new CkStringBuilder();
    xml.GetXmlSb(sbXml);

    // ---------------------------------------------------------------------------------------------
    // Load the previously signed XML containing just one signed record.
    CkStringBuilder sbSignedSoap = new CkStringBuilder();
    success = sbSignedSoap.LoadFile("c:/temp/qa_output/signedSoapXml1.xml","utf-8");
    if (success == false) {
        System.out.println(sbSignedSoap.lastErrorText());
        return;
        }

    // Remove everything before "</sum:Cabecera>", including the "</sum:Cabecera>"
    sbSignedSoap.RemoveBefore("</sum:Cabecera>");

    // Remove everything after the "</sum:RegFactuSistemaFacturacion>", including the "</sum:RegFactuSistemaFacturacion>"
    sbSignedSoap.RemoveAfterFinal("</sum:RegFactuSistemaFacturacion>");

    // We now have the portion of the signed SOAP xml from <sum:RegistroFactura> to </sum:RegistroFactura>
    // Insert it after the </sum:Cabecera>
    sbSignedSoap.Prepend("</sum:Cabecera>");
    sbXml.ReplaceFirst("</sum:Cabecera>",sbSignedSoap.getAsString());

    // ---------------------------------------------------------------------------------------------
    // Add the next signed SOAP containing a single signed record.
    success = sbSignedSoap.LoadFile("c:/temp/qa_output/signedSoapXml2.xml","utf-8");
    if (success == false) {
        System.out.println(sbSignedSoap.lastErrorText());
        return;
        }

    // Remove everything before "</sum:Cabecera>", including the "</sum:Cabecera>"
    sbSignedSoap.RemoveBefore("</sum:Cabecera>");

    // Remove everything after the "</sum:RegFactuSistemaFacturacion>", including the "</sum:RegFactuSistemaFacturacion>"
    sbSignedSoap.RemoveAfterFinal("</sum:RegFactuSistemaFacturacion>");

    // We now have the portion of the signed SOAP xml from <sum:RegistroFactura> to </sum:RegistroFactura>
    // Insert it after the </sum:Cabecera>
    sbSignedSoap.Prepend("</sum:Cabecera>");
    sbXml.ReplaceFirst("</sum:Cabecera>",sbSignedSoap.getAsString());

    // ---------------------------------------------------------------------------------------------
    // Continue adding more signed records if needed.

    // Save the SOAP containing multiple signed records..
    sbXml.WriteFile("c:/temp/qa_output/soap_combined.xml","utf-8",false);
  }
}