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<?xml version="1.0"?>
<!DOCTYPE gsdoc PUBLIC "-//GNUstep//DTD gsdoc 1.0.4//EN" "http://www.gnustep.org/gsdoc-1_0_4.dtd">
<gsdoc base="NSPortCoder" up="Base">
  <head>
    <title>NSPortCoder class reference</title>
    <author name="Andrew Kachites McCallum">
      <email address="mccallum@gnu.ai.mit.edu">
        mccallum@gnu.ai.mit.edu
      </email>
    </author>
    <copy>1997,2000 Free Software Foundation, Inc.</copy>
  </head>
  <body>
    <front><contents /></front>
    <chapter>
      <heading>
        Software documentation for the NSPortCoder class
      </heading>
      <class name="NSPortCoder" super="NSCoder" ovadd="1.0.0">
        <declared>Foundation/NSPortCoder.h</declared>
        <desc>
          This class is an
          <ref type="class" id="NSCoder">NSCoder</ref>
            implementation specialized for sending
            objects over network connections for immediate use
            (as opposed to the archivers which persist objects for
            reconstitution after an indefinite term). It
            is used to help implement the distributed objects
            framework by the
            <ref type="class" id="NSConnection">NSConnection</ref>
              class. Even for highly specialized applications,
              you probably do not need to use this class directly.
        </desc>
        <method type="NSPortCoder*" factory="yes" ovadd="1.0.0">
          <sel>portCoderWithReceivePort:</sel>
          <arg type="NSPort*">recv</arg>
          <sel>sendPort:</sel>
          <arg type="NSPort*">send</arg>
          <sel>components:</sel>
          <arg type="NSArray*">comp</arg>
          <desc>
            Create a new instance for communications over
            <var>send</var> and <var>recv</var>, and
            <var>send</var> an initial message through
            <var>send</var> as specified by <var>comp</var>.
          </desc>
        </method>
        <method type="NSConnection*" ovadd="1.0.0">
          <sel>connection</sel>
          <desc>
            Returns the <code>NSConnection</code> using this
            instance.
          </desc>
        </method>
        <method type="NSPort*" ovadd="1.0.0">
          <sel>decodePortObject</sel>
          <desc>
            Return port object previously encoded by this
            instance. Mainly for use by the ports themselves.
          </desc>
        </method>
        <method type="void" ovadd="1.0.0">
          <sel>dispatch</sel>
          <desc>
            Processes and acts upon the initial message the
            receiver was initialized with..
          </desc>
        </method>
        <method type="void" ovadd="1.0.0">
          <sel>encodePortObject:</sel>
          <arg type="NSPort*">aPort</arg>
          <desc>
            Encodes <var>aPort</var> so it can be sent to the
            receiving side of the connection. Mainly for use
            by the ports themselves.
          </desc>
        </method>
        <method type="id" ovadd="1.0.0">
          <sel>initWithReceivePort:</sel>
          <arg type="NSPort*">recv</arg>
          <sel>sendPort:</sel>
          <arg type="NSPort*">send</arg>
          <sel>components:</sel>
          <arg type="NSArray*">comp</arg>
          <desc>
            Initialize a new instance for communications
            over <var>send</var> and <var>recv</var>, and
            <var>send</var> an initial message through
            <var>send</var> as specified by <var>comp</var>.
          </desc>
        </method>
        <method type="BOOL" ovadd="1.0.0">
          <sel>isBycopy</sel>
          <desc>
            Returns <code>YES</code> if receiver is in the
            process of encoding objects by copying them (rather
            than substituting a proxy). This method is mainly
            needed internally and by subclasses.
          </desc>
        </method>
        <method type="BOOL" ovadd="1.0.0">
          <sel>isByref</sel>
          <desc>
            Returns <code>YES</code> if receiver will
            substitute a proxy when encoding objects rather
            than by copying them. This method is mainly needed
            internally and by subclasses.
          </desc>
        </method>
      </class>
    </chapter>
    <chapter>
      <heading>
        Software documentation for the NSObject(NSPortCoder)
        category
      </heading>
      <category name="NSPortCoder" class="NSObject" ovadd="1.0.0">
        <declared>Foundation/NSPortCoder.h</declared>
        <desc>
          This informal protocol allows an object to control the
          details of how an object is sent over the wire in
          distributed objects Port communications.
        </desc>
        <method type="Class" ovadd="1.0.0">
          <sel>classForPortCoder</sel>
          <desc>
            Must return the class that will be created on the
            remote side of the connection. If the class to be
            created is not the same as that of the object
            returned by replacementObjectForPortCoder: then
            the class must be capable of recognising the object it
            actually gets in its initWithCoder: method. The
            default operation is to return NSDistantObject
            unless the object is being sent bycopy, in which
            case the objects actual class is returned. To force
            bycopy operation the object should return its own
            class. <br /> Override to substitute class when an
            instance is being serialized by an
            <ref type="class" id="NSPortCoder">NSPortCoder</ref>
              . Default implementation returns
              <ref type="method" id="-classForCoder">
                -classForCoder
              </ref>
              .
          </desc>
        </method>
        <method type="id" ovadd="1.0.0">
          <sel>replacementObjectForPortCoder:</sel>
          <arg type="NSPortCoder*">aCoder</arg>
          <desc>
            This message is sent to an object about to be encoded
            for sending over the wire. The default action is to
            return an NSDistantObject which is a local proxy for
            the object unless the object is being sent bycopy, in
            which case the actual object is returned. To force
            bycopy, an object should return itself. <br />
            Returns the actual object to be encoded for sending
            over the network on a Distributed Objects connection.
            <br /> The default implementation returns self if
            the receiver is being sent <em>bycopy</em> and returns
            a proxy otherwise. <br /> Subclasses may override this
            method to change this behavior, eg. to ensure that
            they are always copied.
          </desc>
        </method>
      </category>
    </chapter>
  </body>
</gsdoc>

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