/*

     File: NodeKindValueTransformer.m

 Abstract: The node types NSXMLElementKind etc are a simple enumeration.

 To create a more pleasing interface we create a value transformer that

 changes from the enemerated type to a string, then bind the enumerated

 values to this transformer in the Bindings palette of Interface Builder.

 A second transformer is added to map from an NSXMLNodeKind to whether

 it can have children.

  Version: 1.1

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 */

#import "NodeKindValueTransformer.h"

@implementation NodeKindValueTransformer

+ (Class)transformedValueClass {

    return [NSString class];

}

/* Only need to transform from enumeration -> string */

+ (BOOL)allowsReverseTransformation {

    return NO;

}

- (id)transformedValue:(id)value {

    switch ([value intValue]) {

        case NSXMLInvalidKind:

            return @"-";

            break;

        case NSXMLDocumentKind:

            return @"Document";

            break;

        case NSXMLElementKind:

            return @"Element";

            break;

        case NSXMLAttributeKind:

            return @"Attribute";

            break;

        case NSXMLNamespaceKind:

            return @"Namespace";

            break;

        case NSXMLProcessingInstructionKind:

            return @"Processing Instruction";

            break;

        case NSXMLCommentKind:

            return @"Comment";

            break;

        case NSXMLTextKind:

            return @"Text";

            break;

        case NSXMLDTDKind:

            return @"DTD";

            break;

        case NSXMLEntityDeclarationKind:

            return @"Entity declaration";

            break;

        case NSXMLAttributeDeclarationKind:

            return @"Attribute declaration";

            break;

        case NSXMLElementDeclarationKind:

            return @"Element declaration";

            break;

        case NSXMLNotationDeclarationKind:

            return @"Notation declaration";

            break;

        default:

            return @"";

            break;

    }                                                                                         

}

@end

@implementation NodeCanHaveChildrenValueTransformer

+ (Class)transformedValueClass {

    return [NSNumber class];

}

/* Only need to transform from childCount -> string */

+ (BOOL)allowsReverseTransformation {

    return NO;

}

- (id)transformedValue:(id)value {

    if ([value intValue] == NSXMLElementKind) {

        return [NSNumber numberWithBool:YES];

    } else {

        return [NSNumber numberWithBool:NO];

    }

}

@end