private ClassDescriptor getProjectDescriptor() {
    EISDescriptor descriptor = new EISDescriptor();
    descriptor.setJavaClass(Project.class);
    descriptor.setDataTypeName("project");
    descriptor.setPrimaryKeyFieldName("@id");

    EISDirectMapping nameMapping = new EISDirectMapping();
    nameMapping.setAttributeName("name");
    nameMapping.setXPath("name/text()");
    descriptor.addMapping(nameMapping);

    EISDirectMapping idMapping = new EISDirectMapping();
    idMapping.setAttributeName("id");
    idMapping.setXPath("@id");
    descriptor.addMapping(idMapping);

    // Insert
    XQueryInteraction insertCall = new XQueryInteraction();
    insertCall.setXQueryString("project");
    insertCall.setFunctionName("insert");
    insertCall.setProperty("fileName", "project.xml");
    descriptor.getQueryManager().setInsertCall(insertCall);

    // Read object
    XQueryInteraction readObjectCall = new XQueryInteraction();
    readObjectCall.setFunctionName("read");
    readObjectCall.setProperty("fileName", "project.xml");
    readObjectCall.setXQueryString("project[@id='#@id']");
    readObjectCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadObjectCall(readObjectCall);

    // Read all
    XQueryInteraction readAllCall = new XQueryInteraction();
    readAllCall.setFunctionName("read-all");
    readAllCall.setProperty("fileName", "project.xml");
    readAllCall.setXQueryString("project");
    readAllCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadAllCall(readAllCall);

    // Delete
    XQueryInteraction deleteCall = new XQueryInteraction();
    deleteCall.setFunctionName("delete");
    readAllCall.setProperty("fileName", "project.xml");
    readObjectCall.setXQueryString("project[@id='#@id']");
    descriptor.getQueryManager().setDeleteCall(deleteCall);

    // Update
    XQueryInteraction updateCall = new XQueryInteraction();
    updateCall.setFunctionName("update");
    readAllCall.setProperty("fileName", "project.xml");
    readObjectCall.setXQueryString("project[@id='#@id']");
    descriptor.getQueryManager().setUpdateCall(updateCall);
    return descriptor;
  }
  private EISDescriptor getEmployeeDescriptor() {
    EISDescriptor descriptor = new EISDescriptor();
    descriptor.setJavaClass(Employee.class);
    descriptor.setDataTypeName("employee");
    descriptor.descriptorIsAggregate();

    EISDirectMapping firstNameMapping = new EISDirectMapping();
    firstNameMapping.setAttributeName("firstName");
    firstNameMapping.setXPath("first-name/text()");
    descriptor.addMapping(firstNameMapping);

    EISOneToOneMapping projectMapping = new EISOneToOneMapping();
    projectMapping.setReferenceClass(Project.class);
    projectMapping.setAttributeName("project");
    projectMapping.dontUseIndirection();
    XQueryInteraction projectInteraction = new XQueryInteraction();
    projectInteraction.setFunctionName("read-project");
    projectInteraction.setProperty("fileName", "project.xml");
    projectInteraction.setXQueryString("project[@id='#project-id/text()']");
    projectInteraction.setOutputResultPath("result");
    projectMapping.setSelectionCall(projectInteraction);
    projectMapping.addForeignKeyFieldName("project-id/text()", "@id");

    descriptor.addMapping(projectMapping);
    return descriptor;
  }
  private EISDescriptor getCompanyDescriptor() {
    EISDescriptor descriptor = new EISDescriptor();
    descriptor.setJavaClass(Company.class);
    descriptor.setDataTypeName("company");
    descriptor.setPrimaryKeyFieldName("name/text()");

    EISDirectMapping nameMapping = new EISDirectMapping();
    nameMapping.setAttributeName("name");
    nameMapping.setXPath("name/text()");
    descriptor.addMapping(nameMapping);

    EISCompositeCollectionMapping departmentsMapping = new EISCompositeCollectionMapping();
    departmentsMapping.setAttributeName("departments");
    departmentsMapping.useCollectionClass(java.util.Vector.class);
    departmentsMapping.setReferenceClass(Department.class);
    departmentsMapping.setXPath("department");
    descriptor.addMapping(departmentsMapping);

    // Insert
    XQueryInteraction insertCall = new XQueryInteraction();
    insertCall.setFunctionName("insert");
    insertCall.setProperty("fileName", "company.xml");
    insertCall.setXQueryString("company");
    descriptor.getQueryManager().setInsertCall(insertCall);

    // Read object
    XQueryInteraction readObjectCall = new XQueryInteraction();
    readObjectCall.setFunctionName("read");
    readObjectCall.setProperty("fileName", "company.xml");
    readObjectCall.setXQueryString("company[name/text()='#name/text()']");
    readObjectCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadObjectCall(readObjectCall);

    // Read all
    XQueryInteraction readAllCall = new XQueryInteraction();
    readAllCall.setFunctionName("read-all");
    readAllCall.setProperty("fileName", "company.xml");
    readAllCall.setXQueryString("company");
    readAllCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadAllCall(readAllCall);

    // Delete
    XQueryInteraction deleteCall = new XQueryInteraction();
    deleteCall.setFunctionName("delete");
    deleteCall.setProperty("fileName", "company.xml");
    deleteCall.setXQueryString("company[name/text()='#name/text()']");
    descriptor.getQueryManager().setDeleteCall(deleteCall);

    // Update
    XQueryInteraction updateCall = new XQueryInteraction();
    updateCall.setFunctionName("update");
    updateCall.setProperty("fileName", "company.xml");
    updateCall.setXQueryString("company[name/text()='#name/text()']");
    descriptor.getQueryManager().setUpdateCall(updateCall);

    return descriptor;
  }
  private EISDescriptor getDepartmentDescriptor() {
    EISDescriptor descriptor = new EISDescriptor();
    descriptor.setJavaClass(Department.class);
    descriptor.setDataTypeName("department");
    descriptor.descriptorIsAggregate();

    EISDirectMapping nameMapping = new EISDirectMapping();
    nameMapping.setAttributeName("deptName");
    nameMapping.setXPath("name/text()");
    descriptor.addMapping(nameMapping);

    EISCompositeCollectionMapping employeesMapping = new EISCompositeCollectionMapping();
    employeesMapping.setAttributeName("employees");
    employeesMapping.useCollectionClass(java.util.Vector.class);
    employeesMapping.setReferenceClass(Employee.class);
    employeesMapping.setXPath("employee");
    descriptor.addMapping(employeesMapping);

    return descriptor;
  }
  private EISDescriptor getEmployeeDescriptor() {
    EISDescriptor descriptor = new EISDescriptor();
    descriptor.setJavaClass(Employee.class);
    descriptor.setDataTypeName("ns1:employee");
    descriptor.setPrimaryKeyFieldName("first-name/text()");

    EISDirectMapping firstNameMapping = new EISDirectMapping();
    firstNameMapping.setAttributeName("firstName");
    firstNameMapping.setXPath("first-name/text()");
    descriptor.addMapping(firstNameMapping);

    EISOneToManyMapping projectMapping = new EISOneToManyMapping();
    projectMapping.setReferenceClass(Project.class);
    projectMapping.setAttributeName("projects");
    projectMapping.dontUseIndirection();
    XQueryInteraction projectInteraction = new XQueryInteraction();
    projectInteraction.setFunctionName("read-projects");
    projectInteraction.setProperty("fileName", "project.xml");
    projectInteraction.setXQueryString("project[leader/text()='#first-name/text()']");
    projectInteraction.setOutputResultPath("result");
    projectMapping.setSelectionCall(projectInteraction);

    descriptor.addMapping(projectMapping);

    NamespaceResolver resolver = new NamespaceResolver();
    resolver.put("ns1", "myNamespace");
    descriptor.setNamespaceResolver(resolver);

    // Insert
    XQueryInteraction insertCall = new XQueryInteraction();
    insertCall.setFunctionName("insert");
    insertCall.setProperty("fileName", "employee.xml");
    insertCall.setXQueryString("ns1:employee");
    descriptor.getQueryManager().setInsertCall(insertCall);

    // Read object
    XQueryInteraction readObjectCall = new XQueryInteraction();
    readObjectCall.setFunctionName("read");
    readObjectCall.setProperty("fileName", "employee.xml");
    readObjectCall.setXQueryString("ns1:employee[first-name='#first-name/text()']");
    readObjectCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadObjectCall(readObjectCall);

    // Read all
    XQueryInteraction readAllCall = new XQueryInteraction();
    readAllCall.setFunctionName("read-all");
    readAllCall.setProperty("fileName", "employee.xml");
    readAllCall.setXQueryString("ns1:employee");
    readAllCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadAllCall(readAllCall);

    // Delete
    XQueryInteraction deleteCall = new XQueryInteraction();
    deleteCall.setFunctionName("delete");
    deleteCall.setProperty("fileName", "employee.xml");
    deleteCall.setXQueryString("ns1:employee[first-name='#first-name/text()']");
    descriptor.getQueryManager().setDeleteCall(deleteCall);

    // Update
    XQueryInteraction updateCall = new XQueryInteraction();
    updateCall.setFunctionName("update");
    updateCall.setProperty("fileName", "employee.xml");
    updateCall.setXQueryString("ns1:employee[first-name='#first-name/text()']");
    descriptor.getQueryManager().setUpdateCall(updateCall);

    return descriptor;
  }
  private ClassDescriptor getProjectDescriptor() {
    EISDescriptor descriptor = new EISDescriptor();
    descriptor.setJavaClass(Project.class);
    descriptor.setDataTypeName("project");
    descriptor.setPrimaryKeyFieldName("@id");

    EISDirectMapping nameMapping = new EISDirectMapping();
    nameMapping.setAttributeName("name");
    nameMapping.setXPath("name/text()");
    descriptor.addMapping(nameMapping);

    EISDirectMapping idMapping = new EISDirectMapping();
    idMapping.setAttributeName("id");
    idMapping.setXPath("@id");
    descriptor.addMapping(idMapping);

    EISOneToOneMapping leaderMapping = new EISOneToOneMapping();
    leaderMapping.setReferenceClass(Employee.class);
    leaderMapping.setAttributeName("leader");
    leaderMapping.dontUseIndirection();

    XQueryInteraction leaderInteraction = new XQueryInteraction();
    leaderInteraction.setFunctionName("read-leader");
    leaderInteraction.setProperty("fileName", "employee.xml");
    leaderInteraction.setXQueryString("ns1:employee[first-name/text()='#leader/text()']");
    leaderInteraction.setOutputResultPath("result");
    leaderMapping.setSelectionCall(leaderInteraction);
    leaderMapping.addForeignKeyFieldName("leader/text()", "first-name/text()");

    descriptor.addMapping(leaderMapping);

    // Insert
    XQueryInteraction insertCall = new XQueryInteraction();
    insertCall.setXQueryString("project");
    insertCall.setFunctionName("insert");
    insertCall.setProperty("fileName", "project.xml");
    descriptor.getQueryManager().setInsertCall(insertCall);

    // Read object
    XQueryInteraction readObjectCall = new XQueryInteraction();
    readObjectCall.setFunctionName("read");
    readObjectCall.setProperty("fileName", "project.xml");
    readObjectCall.setXQueryString("project[@id='#@id']");
    readObjectCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadObjectCall(readObjectCall);

    // Read all
    XQueryInteraction readAllCall = new XQueryInteraction();
    readAllCall.setFunctionName("read-all");
    readAllCall.setProperty("fileName", "project.xml");
    readAllCall.setXQueryString("project");
    readAllCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadAllCall(readAllCall);

    // Delete
    XQueryInteraction deleteCall = new XQueryInteraction();
    deleteCall.setFunctionName("delete");
    readAllCall.setProperty("fileName", "project.xml");
    readObjectCall.setXQueryString("project[@id='#@id']");
    descriptor.getQueryManager().setDeleteCall(deleteCall);

    // Update
    XQueryInteraction updateCall = new XQueryInteraction();
    updateCall.setFunctionName("update");
    readAllCall.setProperty("fileName", "project.xml");
    readObjectCall.setXQueryString("project[@id='#@id']");
    descriptor.getQueryManager().setUpdateCall(updateCall);

    return descriptor;
  }
  private EISDescriptor getEmployeeDescriptor() {
    EISDescriptor descriptor = new EISDescriptor();
    descriptor.setJavaClass(Employee.class);
    descriptor.setDataTypeName("employee");
    descriptor.setPrimaryKeyFieldName("first-name/text()");

    EISDirectMapping firstNameMapping = new EISDirectMapping();
    firstNameMapping.setAttributeName("firstName");
    firstNameMapping.setXPath("first-name/text()");
    descriptor.addMapping(firstNameMapping);

    EISOneToManyMapping projectMapping = new EISOneToManyMapping();
    projectMapping.setAttributeName("projects");
    projectMapping.setReferenceClass(Project.class);
    projectMapping.setForeignKeyGroupingElement("project");
    projectMapping.setIsForeignKeyRelationship(true);
    projectMapping.dontUseIndirection();
    XQueryInteraction projectInteraction = new XQueryInteraction();
    projectInteraction.setFunctionName("read-projects");
    projectInteraction.setProperty("fileName", "project.xml");
    projectInteraction.setXQueryString("project[@id='#project-id/text()']");
    projectInteraction.setOutputResultPath("result");
    // do not set a selection call on this mapping...
    /* projectMapping.setSelectionCall(projectInteraction); */
    projectMapping.addForeignKeyFieldName("project-id/text()", "@id");

    descriptor.addMapping(projectMapping);

    // Insert
    XQueryInteraction insertCall = new XQueryInteraction();
    insertCall.setFunctionName("insert");
    insertCall.setProperty("fileName", "employee.xml");
    insertCall.setXQueryString("employee");
    descriptor.getQueryManager().setInsertCall(insertCall);

    // Read object
    XQueryInteraction readObjectCall = new XQueryInteraction();
    readObjectCall.setFunctionName("read");
    readObjectCall.setProperty("fileName", "employee.xml");
    readObjectCall.setXQueryString("employee[first-name='#first-name/text()']");
    readObjectCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadObjectCall(readObjectCall);

    // Read all
    XQueryInteraction readAllCall = new XQueryInteraction();
    readAllCall.setFunctionName("read-all");
    readAllCall.setProperty("fileName", "employee.xml");
    readAllCall.setXQueryString("employee");
    readAllCall.setOutputResultPath("result");
    descriptor.getQueryManager().setReadAllCall(readAllCall);

    // Delete
    XQueryInteraction deleteCall = new XQueryInteraction();
    deleteCall.setFunctionName("delete");
    deleteCall.setProperty("fileName", "employee.xml");
    deleteCall.setXQueryString("employee[first-name='#first-name/text()']");
    descriptor.getQueryManager().setDeleteCall(deleteCall);

    // Update
    XQueryInteraction updateCall = new XQueryInteraction();
    updateCall.setFunctionName("update");
    updateCall.setProperty("fileName", "employee.xml");
    updateCall.setXQueryString("employee[first-name='#first-name/text()']");
    descriptor.getQueryManager().setUpdateCall(updateCall);
    return descriptor;
  }