udkapi/com/sun/star/io/ObjectInputStream.idl

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  19 #ifndef __com_sun_star_io_ObjectInputStream_idl__
  20 #define __com_sun_star_io_ObjectInputStream_idl__
  21
  22 #include <com/sun/star/io/XObjectInputStream.idl>
  23
  24 #include <com/sun/star/io/XActiveDataSink.idl>
  25
  26 #include <com/sun/star/io/XConnectable.idl>
  27
  28 #include <com/sun/star/io/XMarkableStream.idl>
  29
  30
  31
  32  module com {  module sun {  module star {  module io {
  33
  34 /** is a stream which allows reading the data of persistent objects.
  35
  36     <p>Implementations of this service must fulfill the specifications of the
  37     DataInputStream service. It must be chained to an
  38     XMarkableStream. Therefore, it provides the
  39     XMarkableStream interface, and delegates the calls to the
  40     chained object.  </p>
  41     <p>The written objects are held until this instance is destroyed.
  42     The references to the objects are read as four-byte integers.
  43     Data format reads:</p>
  44
  45     <pre>
  46     short   InfoLength
  47     long    ObjectReference  // 0 indicates no object
  48     UTF     ServiceName      // length of 0 indicates this is only a reference
  49     long    ObjectLength     // 0 if it is a reference or no object, otherwise the len of the object data
  50     Object  ObjectData       // the data of the object
  51     ...                      // skipping additional data
  52     </pre>
  53
  54     @note
  55     <ul>
  56         <li>-thread safe</li>
  57         <li>-allow buffer size is 2 ^ 31 -1</li>
  58         <li>-maximum object reference identifier must be the number of objects. </li>
  59         <li>-object reference identifier 0 indicates no object</li>
  60         <li>-skip addition data</li>
  61         <li>-set the stream position behind the object data</li>
  62     </ul>
  63  */
  64 published service ObjectInputStream
  65 {
  66     /** allows to read the data from the stream.
  67      */
  68     interface com::sun::star::io::XObjectInputStream;
  69
  70     /** allows to set the underlying inputstream */
  71     interface com::sun::star::io::XActiveDataSink;
  72
  73     /** allows to navigate via a chain of streams */
  74     interface com::sun::star::io::XConnectable;
  75
  76     /** allows to set marks within the stream. The implementation
  77      may forward calls to this interface to a chained markablestream. */
  78     interface com::sun::star::io::XMarkableStream;
  79
  80 };
  81
  82
  83 }; }; }; };
  84
  85 #endif
  86
  87 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */