[snippet] Java 1.5 Enums IPropertySelectionModel facade

[Dan <l0...@gmail.com>]

Hi,

The snippet below is an implementation IPropertySelectionModel
which is in fact facade over JDK1.5 enums.
Usage:
public enum MySampleEnum {
	ONE, TWO, THREE;
}
IPropertySelectionModel model = new EnumPropertySelectionModel( 
MySampleEnum.ONE );

Maybe it will be useful for someone...
---- start -----
package foo.bar;
import java.lang.reflect.Method;
import org.apache.tapestry.form.IPropertySelectionModel;

public class EnumPropertySelectionModel  implements IPropertySelectionModel {
    public EnumPropertySelectionModel(Enum en){
        clazz = en.getClass();
        try {
            Method m = en.getClass().getMethod("values", new Class[0]);
            Object ret = m.invoke(null, new Object[0]);
            values = (Enum[]) ret;
        }catch(RuntimeException e){
            throw e;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    public int getOptionCount() {
        return values.length;
    }

    public Object getOption(int index) {
        return values[index];
    }

    public String getLabel(int index) {
        return values[index].name();
    }

    public String getValue(int index) {
        return Integer.toString(index);
    }

    public Object translateValue(String value) {
        return Enum.valueOf(clazz, value);
    }
    private Enum[] values;
    private Class<? extends Enum> clazz;
}
---- stop -----
Regards
Dan



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