/**
 * Overridable helper method used for special case handling of schema information for
 * Enums.
 * 
 * @return True if method handled callbacks; false if not; in latter case caller will
 *   send default callbacks
 *
 * @since 2.6
 */
protected boolean _acceptJsonFormatVisitorForEnum(JsonFormatVisitorWrapper visitor,
        JavaType typeHint, Class<?> enumType)
    throws JsonMappingException
{
    // Copied from EnumSerializer#acceptJsonFormatVisitor
    JsonStringFormatVisitor stringVisitor = visitor.expectStringFormat(typeHint);
    if (stringVisitor != null) {
        Set<String> enums = new LinkedHashSet<String>();
        for (Object en : enumType.getEnumConstants()) {
            try {
                // 21-Apr-2016, tatu: This is convoluted to the max, but essentially we
                //   call `@JsonValue`-annotated accessor method on all Enum members,
                //   so it all "works out". To some degree.
                enums.add(String.valueOf(_accessor.getValue(en)));
            } catch (Exception e) {
                Throwable t = e;
                while (t instanceof InvocationTargetException && t.getCause() != null) {
                    t = t.getCause();
                }
                ClassUtil.throwIfError(t);
                throw JsonMappingException.wrapWithPath(t, en, _accessor.getName() + "()");
            }
        }
        stringVisitor.enumTypes(enums);
    }
    return true;
}
 

@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
    throws JsonMappingException
{
    SerializerProvider serializers = visitor.getProvider();
    if (_serializeAsIndex(serializers)) {
        visitIntFormat(visitor, typeHint, JsonParser.NumberType.INT);
        return;
    }
    JsonStringFormatVisitor stringVisitor = visitor.expectStringFormat(typeHint);
    if (stringVisitor != null) {
        Set<String> enums = new LinkedHashSet<String>();
        
        // Use toString()?
        if ((serializers != null) && 
                serializers.isEnabled(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)) {
            for (Enum<?> e : _values.enums()) {
                enums.add(e.toString());
            }
        } else {
            // No, serialize using name() or explicit overrides
            for (SerializableString value : _values.values()) {
                enums.add(value.getValue());
            }
        }
        stringVisitor.enumTypes(enums);
    }
}
 

@Override
protected void _acceptTimestampVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException
{
    SerializerProvider provider = visitor.getProvider();
    boolean useTimestamp = (provider != null) && useTimestamp(provider);
    if (useTimestamp) {
        super._acceptTimestampVisitor(visitor, typeHint);
    } else {
        JsonStringFormatVisitor v2 = visitor.expectStringFormat(typeHint);
        if (v2 != null) {
            v2.format(JsonValueFormat.DATE_TIME);
        }
    }
}
 

@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
    throws JsonMappingException
{
    if (useTimestamp(visitor.getProvider())) {
        _acceptTimestampVisitor(visitor, typeHint);
    } else {
        JsonStringFormatVisitor v2 = visitor.expectStringFormat(typeHint);
        if (v2 != null) {
            v2.format(JsonValueFormat.TIME);
        }
    }
}
 

@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException
{
    SerializerProvider provider = visitor.getProvider();
    boolean useTimestamp = (provider != null) && useTimestamp(provider);
    if (useTimestamp) {
        _acceptTimestampVisitor(visitor, typeHint);
    } else {
        JsonStringFormatVisitor v2 = visitor.expectStringFormat(typeHint);
        if (v2 != null) {
            v2.format(JsonValueFormat.DATE);
        }
    }
}
 

@Override
public JsonStringFormatVisitor expectStringFormat(JavaType type) throws JsonMappingException {
    addFieldIfPresent("String");
    return new JsonStringFormatVisitor.Base();
}