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Data Mapper package is a high-performance data binding package built on Jackson JSON processor

There is a newer version: 1.9.13

package org.codehaus.jackson.map.util;

import java.util.*;

import org.codehaus.jackson.map.*;

/**
 * Helper class used for storing String serializations of
 * enumerations.
 */
public final class EnumValues
{
    private final EnumMap _values;

    @SuppressWarnings("unchecked")
    private EnumValues(Map,String> v) {
        _values = new EnumMap(v);
    }

    public static EnumValues construct(Class> enumClass, AnnotationIntrospector intr)
    {
        return constructFromName(enumClass, intr);
    }

    public static EnumValues constructFromName(Class> enumClass, AnnotationIntrospector intr)
    {
        /* [JACKSON-214]: Enum types with per-instance sub-classes
         *   need special handling
         */
    	Class> cls = ClassUtil.findEnumType(enumClass);
        Enum[] values = cls.getEnumConstants();
        if (values != null) {
            // Type juggling... unfortunate
            Map,String> map = new HashMap,String>();
            for (Enum en : values) {
                map.put(en, intr.findEnumValue(en));
            }
            return new EnumValues(map);
        }
        throw new IllegalArgumentException("Can not determine enum constants for Class "+enumClass.getName());
    }

    public static EnumValues constructFromToString(Class> enumClass, AnnotationIntrospector intr)
    {
        Class> cls = ClassUtil.findEnumType(enumClass);
        Enum[] values = cls.getEnumConstants();
        if (values != null) {
            // Type juggling... unfortunate
            Map,String> map = new HashMap,String>();
            for (Enum en : values) {
                map.put(en, en.toString());
            }
            return new EnumValues(map);
        }
        throw new IllegalArgumentException("Can not determine enum constants for Class "+enumClass.getName());
    }
    
    public String valueFor(Enum key)
    {
        return _values.get(key);
    }

    public Collection values() {
        return _values.values();
    }
}