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  1. Commons BeanUtils
  2. BEANUTILS-411

BeanUtilsBean.setProperty throws IllegalArgumentException if getter of nested property returns null


    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.8.0, 1.8.1, 1.8.2, 1.8.3
    • Fix Version/s: 1.8.4
    • Component/s: Bean / Property Utils
    • Labels:
    • Environment:

      Apache Struts 1.3.10 (latest) uses commons-beanutils 1.8.0


      The issue is like #BEANUTILS-331, BEANUTILS-339 where BeanUtils.populate() -> BeanUtilsBean.setProperty throws an IllegalArgumentException when it should not.

      error situation (see attached JUnitTest):
      BeanUtilsBean.setProperty(bean,"foo.bar", value) with a nested property "foo.bar" where bean.getFoo() returns null.
      Line 903 (in 1.8.0 -1.8.3) getPropertyUtils().getProperty(target, resolver.next(name));
      returns null (because bean.getFoo() returns null) which is not handled correctly.
      The Exception is thrown in line 963 because target == null.

      SetProperty should silently return like in the case the property does not exist.

      BeanUtils.populate(), BeanUtilsBean.setProperty are used by Struts to populate HTTP-Request-Parameters to form beans (form backing objects). The request sent by a browser when clicking a <input type="image" name="imgLink"...> contains parameters "imgLink.x" and "imgLink.y". These request parameters should not let to an error when populating to a bean which has the property "imgLink".
      The application should be able to process these parameters after bean populating, which is not possible now because populate fails.

      Test case to reproduce:
      public class BeanUtilsBeanTest extends TestCase
      public void testSetProperty()
      throws Exception

      { DummyBean testBean = new DummyBean(); // nested==null BeanUtilsBean instance = new BeanUtilsBean(); /* fails with java.lang.IllegalArgumentException: No bean specified * Reason: getPropertyUtils().getProperty(target, resolver.next(name)); returnes null * because DummyBean.getImgLink() returns null */ instance.setProperty(testBean, "imgLink.x", "1"); }

      public class DummyBean
      private String imgLink = null; // stays null

      public String getImgLink ()

      { return imgLink; }

      public void setImgLink(String imgLink)

      { this.imgLink = imgLink; }


      suggestion for a fix:
      Return after line 903 if getProperty returns null and therefor target becomes null.




            • Assignee:
              britter Benedikt Ritter
              marcusz Marcus Zander
            • Votes:
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