#Newstream enterprises def tank assembly code

Copy link to this section Using the Stream InterfaceĪll streams inherit a set of methods and properties used to manipulate the data they contain. In this example, data for DailyImage is stored in a file (with an automatically generated name) in the C:/Images directory, while the data for the Text property is stored in a global named ^MyText.

#Newstream enterprises def tank assembly code

JournalEntry Extends %Persistent Copy code to clipboard In the following example, the JournalEntry class contains four stream properties (one for each of the first four stream classes), and specifies a default storage location for two of them:Ĭlass testPkg. The first four classes can use the optional LOCATION parameter to specify a default storage location. The %Stream.TmpCharacter Opens in a new tab and %Stream.TmpBinary Opens in a new tab classes are used for streams that do not need to be saved. The %Stream.GlobalCharacter Opens in a new tab and %Stream.GlobalBinary Opens in a new tab classes are used for streams stored as globals.

The %Stream.FileCharacter Opens in a new tab and %Stream.FileBinary Opens in a new tab classes are used for streams stored as external files. Stream data may be stored in an external file or an InterSystems IRIS global (or not at all), depending on how the stream property is defined: Character streams, like strings, may undergo a Unicode translation within client applications.

Similarly, character streams contain the same sort of data as type %String Opens in a new tab, and are intended for storing large amounts of text. Binary streams contain the same sort of data as type %Binary Opens in a new tab, and are intended for very large binary objects such as pictures. InterSystems IRIS supports both binary streams and character streams. Copy link to this section Declaring Stream Properties Similarly, for %Stream.FileCharacter Opens in a new tab and %Stream.FileBinary Opens in a new tab, if you set the Filename property, you should next check for an error by examining %objlasterror. If a method returns a status value, your code should check that returned value and proceed appropriately. In all cases, consult the class reference for details. Many of the methods of these classes return status values. Note that stream classes are object classes. The class library includes additional stream classes, but those are not intended for general use. The %Library package also includes stream classes, but those are deprecated. These classes all inherit from %Stream.Object Opens in a new tab, which defines the common stream interface. %Stream.TmpBinary Opens in a new tab - use this when you need a stream to hold binary data but do not need to save the data. %Stream.TmpCharacter Opens in a new tab - use this when you need a stream to hold character data but do not need to save the data. %Stream.FileBinary Opens in a new tab - use to store binary data in an external file. %Stream.FileCharacter Opens in a new tab - use this to store character data in an external file. %Stream.GlobalBinary Opens in a new tab - use this to store binary data in global nodes. %Stream.GlobalCharacter Opens in a new tab - use this to store character data in global nodes. InterSystems IRIS® data platform provides the following stream classes:

Copy link to this section Introduction to Stream Classes This chapter describes streams and stream properties. You can also define standalone stream objects for other purposes, such as for use as an method argument or return value. You can define stream properties in any object class. Streams provide a way to store extremely large amounts of data (longer than the string length limit). Projection of Stream Properties to SQL and ODBC.