From: Marcus Walls <marcus.walls_at_ASPECTIVE.COM>
Date: Fri, 17 Jan 2003 12:18:42 -0700

I am experiencing a NullPointerException during on-demand validation.

I create an instance of my Settings class using the generated
ObjectFactory.createSettings() method.

I immediately attempt to validate it (validateRoot) and I get the
NullPointerException depicted below rather than the ValidationException
I was expecting.

Stack-trace and full schema below.

Thanks

Marcus



=== stacktrace ===

java.lang.NullPointerException
    at com.sun.xml.bind.validator.MSVValidator.childAsElements(MSVValidator.java:249)
    at com.aspective.customer.config.xml.impl.SettingsTypeImpl.serializeElements(SettingsTypeImpl.java:40)
    at com.aspective.customer.config.xml.impl.SettingsImpl.serializeElements(SettingsImpl.java:41)
    at com.sun.xml.bind.validator.MSVValidator._validate(MSVValidator.java:88)
    at com.sun.xml.bind.validator.MSVValidator.validate(MSVValidator.java:69)
    at com.sun.xml.bind.validator.ValidationContext.validate(ValidationContext.java:78)
    at com.sun.xml.bind.validator.ValidatorImpl.validate(ValidatorImpl.java:99)
    at com.sun.xml.bind.validator.ValidatorImpl.validateRoot(ValidatorImpl.java:80)


=== settings.xsd ===


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
            jxb:version="1.0">

<!-- the root element for the settings XML file -->
<xsd:element name="settings" type="SettingsType"/>

  <xsd:simpleType name="trimmedString">
    <xsd:restriction base="xsd:string">
      <xsd:annotation>
        <xsd:appinfo>
          <jxb:javaType name="java.lang.String"
                        parse="com.aspective.common.jaxb.TrimmedString.trim"
                        print="com.aspective.common.jaxb.TrimmedString.trim">
          </jxb:javaType>
        </xsd:appinfo>
      </xsd:annotation>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- this is the top-level container for settings -->
  <xsd:complexType name="SettingsType">
    <xsd:sequence>
      <xsd:element name="database" type="DatabaseSettings"/>
    </xsd:sequence>
  </xsd:complexType>

  <!-- database settings -->
  <xsd:complexType name="DatabaseSettings">

    <xsd:sequence>

      <xsd:element name="username">
        <xsd:simpleType>
          <xsd:restriction base="xsd:string">
            <xsd:maxLength value="16"/>
          </xsd:restriction>
        </xsd:simpleType>
      </xsd:element>

      <xsd:element name="password">
        <xsd:simpleType>
          <xsd:restriction base="trimmedString">
            <xsd:maxLength value="16"/>
          </xsd:restriction>
        </xsd:simpleType>
      </xsd:element>

    </xsd:sequence>

  </xsd:complexType>

</xsd:schema>