[beanutils] Retrieving enum property from class

[Corey Sanders <co...@gmail.com>]

I am trying to retrieve an enum property from a class using
BeanUtils.getProperty(object, propertyName) and I'm not seeing the behavior
I expect. Instead of returning the property as an instance of the enum,
BeanUtils is returning it as a String.

I searched around and I see a lot of examples of people trying to do the
reverse, set an enum property using the string value, but no one with my
problem. What is the expected behavior here and is there a way to get the
value as an enum instead of a String?

package test;

import org.apache.commons.beanutils.BeanUtils;

public class Tester
{
  public static enum Type {
    ON,
    OFF
  }

  private Type type = Type.ON;

  public Type getType() {
    return this.type;
  }

  public void setType(Type type) {
    this.type = type;
  }

  public static void main(String [] args)
    throws Exception
  {
    Tester tester = new Tester();
    Object value = BeanUtils.getProperty(tester, "type");
    System.out.println("The type property is an instanceof " +
value.getClass().getName() + " with value " + value.toString());
  }
}

$ java -classpath
classes:commons-beanutils-1.8.3.jar:commons-logging-1.1.1.jar test.Tester
The type property is an instanceof java.lang.String with value ON


-- Corey

Re: [beanutils] Retrieving enum property from class

[Maria Jimena Sanchez <ji...@gmail.com>]

javadoc specifically says that value will be converted to a string value.
quoting BeanUtils' javadoc "Return the value of the specified property of
the specified bean, no matter which property reference format is used, as a
String. "
if you want the object you can use PropertyUtils instead. here is what the
javadoc says: "Return the value of the specified property of the specified
bean, no matter which property reference format is used, with no type
conversions"

Your code will look like this:
Object value = *PropertyUtils*.getProperty(tester, "type");

On Mon, Oct 15, 2012 at 4:28 PM, Corey Sanders
<co...@gmail.com>wrote:

> I am trying to retrieve an enum property from a class using
> BeanUtils.getProperty(object, propertyName) and I'm not seeing the behavior
> I expect. Instead of returning the property as an instance of the enum,
> BeanUtils is returning it as a String.
>
> I searched around and I see a lot of examples of people trying to do the
> reverse, set an enum property using the string value, but no one with my
> problem. What is the expected behavior here and is there a way to get the
> value as an enum instead of a String?
>
> package test;
>
> import org.apache.commons.beanutils.BeanUtils;
>
> public class Tester
> {
>   public static enum Type {
>     ON,
>     OFF
>   }
>
>   private Type type = Type.ON;
>
>   public Type getType() {
>     return this.type;
>   }
>
>   public void setType(Type type) {
>     this.type = type;
>   }
>
>   public static void main(String [] args)
>     throws Exception
>   {
>     Tester tester = new Tester();
>     Object value = BeanUtils.getProperty(tester, "type");
>     System.out.println("The type property is an instanceof " +
> value.getClass().getName() + " with value " + value.toString());
>   }
> }
>
> $ java -classpath
> classes:commons-beanutils-1.8.3.jar:commons-logging-1.1.1.jar test.Tester
> The type property is an instanceof java.lang.String with value ON
>
>
> -- Corey
>