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Swift data binding generator for multiple data formats including JSON and Avro.

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@args com.linkedin.pegasus.generator.spec.UnionTemplateSpec union, org.coursera.courier.swift.SwiftSyntax syntax, org.coursera.courier.swift.SwiftyJSON swifty
@import com.linkedin.pegasus.generator.spec.UnionTemplateSpec.Member

@{ String className = syntax.escapeKeyword(union.getClassName()) }

public static func readJSON(json: JSON) throws -> @className {
  @if (union.getMembers().size() > 0) {let dict = json.dictionaryValue}
  @for(Member member: union.getMembers()) {
  @{ String unionMemberName = syntax.toUnionMemberName(member.getClassTemplateSpec()) }
    if let member = dict["@(member.getSchema().getUnionMemberKey())"] {
      return .@(unionMemberName)(@swifty.toGetAccessor("member", member))
    }
  }
  if let unknownDict = json.dictionaryObject {
    return .UNKNOWN$(unknownDict)
  } else {
    throw ReadError(cause: "Union must be a JSON object.")
  }
}

public func writeData() -> [String: AnyObject] {
  switch self {
    @for(Member member: union.getMembers()) {
    @{ String unionMemberName = syntax.toUnionMemberName(member.getClassTemplateSpec()) }
      case .@(unionMemberName)(let member):
        return ["@(member.getSchema().getUnionMemberKey())": @swifty.toSetAccessor("member", member)];
    }
    case .UNKNOWN$(let dict):
      return dict
  }
}