[BEANUTILS-214] [beanutils] Preserving DynaBean Property Ordering

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 2.0.0
• Component/s: DynaBean

Environment

Operating System: All
Platform: All

• Bugzilla Id: 37825
• Assignee: Unassigned
• Reporter: Martin Fick
• Created: 08/Dec/05 05:07
• Updated: 05/Dec/13 21:05

Description

The order of properties is not preserved when using the beanutils to fetch
properties from a DynaBean. Since DynaBeans use an array to define properties
it is natural desire to use the order of this array to do things with a
DynaBean. With a 2 line patch to BeanUtilsBean.java, it can be made to return
a LinkedHashMap for DynaBean properties which preserves the ordering of these
properties.

This patch is particularly usefull if you are using the <display> tag to
display DynaBeans. Several people have suggested a patch like this on the
<display> tag mailing list.

• • • BeanUtilsBean.java
    • BeanUtilsBean.java.ordered
    • 26,31 ****
    • 26,32 ----
      import java.util.ArrayList;
      import java.util.Collection;
      import java.util.HashMap;
      + import java.util.LinkedHashMap;
      import java.util.Iterator;
      import java.util.Map;
      import java.util.WeakHashMap;
    • 487,493 ****
      log.debug("Describing bean: " + bean.getClass().getName());
      }

! Map description = new HashMap();
if (bean instanceof DynaBean)

{ DynaProperty descriptors[] = ((DynaBean) bean).getDynaClass().getDynaProperties(); --- 488,494 ---- log.debug("Describing bean: " + bean.getClass().getName()); }

! Map description = new LinkedHashMap();
if (bean instanceof DynaBean) {
DynaProperty descriptors[] =
((DynaBean) bean).getDynaClass().getDynaProperties();