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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 8364] New: - java.util.List support for getIndexedProperty()
Date Mon, 22 Apr 2002 10:12:00 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=8364

java.util.List support for getIndexedProperty()

           Summary: java.util.List support for getIndexedProperty()
           Product: Commons
           Version: unspecified
          Platform: All
        OS/Version: Other
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: Bean Utilities
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: volker.weber@atanion.com


While developping a application using struts we had to access elements of a
List interface. this dosn't works with current beanutils. 
indexed access to 'Object[]' is implemented and with the same scheme it is
also posible to access elements of 'java.util.List'.

I have patched the class 'org.apache.commons.beanutils.PropertyUtils.java'
to meet our requirements. 
I think this feature should added to beanutils.

diff of  org.apache.commons.beanutils.PropertyUtils.java follows:


@@ -76,6 +76,7 @@
 import java.util.HashMap;
 import java.util.Map;
 import org.apache.commons.collections.FastHashMap;
+import java.util.List;
 
 
 /**
@@ -409,19 +410,25 @@
 	    }
 	}
 
-	// Otherwise, the underlying property must be an array
+	// Otherwise, the underlying property must be an array or a List
         Method readMethod = getReadMethod(descriptor);
 	if (readMethod == null)
 	    throw new NoSuchMethodException("Property '" + name +
 					    "' has no getter method");
 
-	// Call the property getter and return the value
+        // Call the property getter and return the value
 	Object value = readMethod.invoke(bean, new Object[0]);
-	if (!value.getClass().isArray())
-	    throw new IllegalArgumentException("Property '" + name +
-					       "' is not indexed");
-	return (Array.get(value, index));
 
+	if (value.getClass().isArray())
+          return (Array.get(value, index));
+        else if (value instanceof List) {
+          return ((List)value).get(index);
+        }
+        else {
+          throw new IllegalArgumentException("Property '" + name +
+                                             "' is not indexed");
+
+        }
     }

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