Failed to map enumeration and NoSuchMethodException thrown

[col...@gmail.com]

We have some fields defined as enumeration in source object and destination object, we need to map enum to enum. But it failed to map. (all enum to enum mapping failed). And the following exception thrown out

 

java.lang.NoSuchMethodExceptiopackagename.FunctionCodeEnum$Enum.<init>()

 

Any insights will be highly appreciated!

 

 

[Miguel C.]

Can you post your code? and the complete trace.

[Leszek Zając]

I does not work. Use a custom converter:

public class EnumConverter implements CustomConverter {

    @Override

    public Object convert(Object existingDestinationFieldValue, Object sourceFieldValue,

            Class<?> destinationClass, Class<?> sourceClass) {

        if (!destinationClass.isEnum()) {

            throw new IllegalArgumentException("destinationClass must be an enum");

        }

        if (!sourceClass.isEnum()) {

            throw new IllegalArgumentException("sourceClass must be an enum");

        }

        Enum<?> sourceValue = (Enum<?>) sourceFieldValue;

        Object[] values = destinationClass.getEnumConstants();

        for (Object value : values) {

            Enum<?> enumValue = (Enum<?>) value;

            if (enumValue.name().equals(sourceValue.name())) {

                return enumValue;

            }

        }

        throw new IllegalArgumentException("Enum constant [" + sourceValue + "] not found in "

                + destinationClass);

    }

}

<custom-converters>

<!-- This is a trick to make Dozer convert enums -->

<converter type="pl.webcad.clientservice.mapping.EnumConverter">

<class-a>java.lang.Enum</class-a>

<class-b>java.lang.Enum</class-b>

</converter>

</custom-converters>

[Roberto Socrates]

Let me "generify" your code:

    public <T extends Enum<T>, R extends Enum<R>> T enums(

        /*Object existingDestinationFieldValue, */

        Class<T> destinationClass,

        R sourceFieldValue, Class<R> sourceClass) {

        if (!destinationClass.isEnum()) {

            throw new IllegalArgumentException("destinationClass must be an enum");

        }

        if (!sourceClass.isEnum()) {

            throw new IllegalArgumentException("sourceClass must be an enum");

        }

        R sourceValue = sourceFieldValue;

        T[] values = destinationClass.getEnumConstants();

        for (T value : values) {

            if (value.name().equals(sourceValue.name())) {

                return value;