Unmarshalling a record group throws org.beanio.BeanReaderException: Record groups not supported by Unmarshallers

[Nico Schlebusch]

Hi everyone

I'm trying to configure a mapping.xml file to read (unmarshal) a record group. According to sections:

• 4.2.3. Record Grouping and

• 4.8.1. Mapping Bean Objects that Span Multiple Records

from the reference guide, this should be possible.

I'm currently trying to run the example from section 4.8.1, but get the above exception:

org.beanio.BeanReaderException: Record groups not supported by Unmarshallers
    at org.beanio.internal.parser.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:191)
    at org.beanio.internal.parser.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:89)

Is there something misconfigured in the example code or is it just not possible to unmarshal a record group? I'm really hoping that something is misconfigured. I have seen other posts about record groups that seem to be working.

For easy reference, here is the mapping.xml

  <stream name="orders" format="csv">
    <group name="order" class="example.Order" minOccurs="0" maxOccurs="unbounded">
      <record name="orderRecord" order="1" minOccurs="1">
        <field name="recordType" rid="true" literal="Order" ignore="true" />
        <field name="id" />
        <field name="date" format="yyyy-MM-dd" />
        <field name="amount" />
      </record>
      <record name="customer" class="example.Customer" order="2" minOccurs="1" maxOccurs="1">
        <field name="recordType" rid="true" literal="Customer" ignore="true" />
        <field name="firstName" />
        <field name="lastName" />
      </record>      
      <record name="items" class="example.Item" collection="list" order="3" minOccurs="1" maxOccurs="unbounded">
        <field name="recordType" rid="true" literal="Item" ignore="true" />
        <field name="name" />
        <field name="quantity" />
        <field name="amount" />
      </record>
    </group>
  </stream>

The Java objects:

// getters + setters not shown
// imports also not shown
package example;

public class Order {
    String id;
    Date date;
    BigDecimal amount;
    Customer customer;
    List<Item> items;
}

public class Customer {
    String firstName;
    String lastName;
}

public class Item {
    String name;
    int quantity;
    BigDecimal amount;
}

And the test class:

package example;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.junit.Assert.assertThat;

import org.beanio.StreamFactory;
import org.beanio.Unmarshaller;

import org.junit.BeforeClass;
import org.junit.Test;

/**
 * @author Nico Schlebusch
 */
public class TestBeanIO {

  private static StreamFactory factory;

  /**
   * @throws java.lang.Exception
   */
  @BeforeClass
  public static void setUpBeforeClass() throws Exception {

    factory = StreamFactory.newInstance();
    assertThat(factory, is(notNullValue()));
    factory.loadResource("mapping.xml");
  }

  @Test
  public void test() {

    final String data =
            "Order,101,2012-02-01,5.00\r\n" +
            "Customer,John,Smith\r\n" +
            "Item,Apple,2,2.00\r\n" +
            "Item,Orange,1,1.00\r\n" +
            "Order,102,2012-02-01,3.00\r\n" +
            "Customer,Jane,Johnson\r\n" +
            "Item,Ham,1,3.00";
    final Unmarshaller unmarshaller = factory.createUnmarshaller("orders");
    final Object object = unmarshaller.unmarshal(data);
    assertThat(object, is(notNullValue()));
  }

}

Thank you
Nico

[Vitalii Tymchyshyn]

I think you need to use the reader, not unmarshaller. Unmarshallers work with 1 record only.

Пт, 8 січ. 2016 04:19 Nico Schlebusch <nico...@gmail.com> пише:

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[Nico Schlebusch]

Hi Vitalii

Thank you! Using the BeanReader solved the problem.

Nico