net.jxta.impl.protocol
Class DiscoveryQuery

java.lang.Object
  net.jxta.protocol.DiscoveryQueryMsg
      net.jxta.impl.protocol.DiscoveryQuery

public class DiscoveryQuery
extends DiscoveryQueryMsg

Implements the Discovery Query Message according to the schema defined by the standard JXTA Peer Discovery Protocol (PDP).

 <xs:element name="DiscoveryQuery" type="jxta:DiscoveryQuery"/>

 <xsd:simpleType name="DiscoveryQueryType">
   <xsd:restriction base="xsd:string">
     <!-- peer -->
     <xsd:enumeration value="0"/>
     <!-- group -->
     <xsd:enumeration value="1"/>
     <!-- adv -->
     <xsd:enumeration value="2"/>
   </xsd:restriction>
 </xsd:simpleType>

 <xs:complexType name="DiscoveryQuery">
   <xs:sequence>
     <xs:element name="Type" type="jxta:DiscoveryQueryType"/>
     <xs:element name="Threshold" type="xs:unsignedInt" minOccurs="0"/>
     <xs:element name="Attr" type="xs:string" minOccurs="0"/>
     <xs:element name="Value" type="xs:string" minOccurs="0"/>
     <!-- The following should refer to a peer adv, but is instead a whole doc for historical reasons -->
     <xs:element name="PeerAdv" type="xs:string" minOccurs="0"/>
   </xs:sequence>
 </xs:complexType>
 

See Also:

DiscoveryService, DiscoveryServiceImpl, JXTA Protocols Specification : Peer Discovery Protocol

DiscoveryQuery

public DiscoveryQuery()

Default constructor

DiscoveryQuery

public DiscoveryQuery(Element doc)

Construct from a StructuredDocument

handleElement

protected boolean handleElement(Element raw)

Process an individual element from the document during parse. Normally, implementations will allow the base advertisments a chance to handle the element before attempting ot handle the element themselves. ie.

  protected boolean handleElement(Element elem) {

      if (super.handleElement()) {
           // it's been handled.
           return true;
           }

      ... handle elements here ...

      // we don't know how to handle the element
      return false;
      }
  

Parameters:

elem - the element to be processed.

Returns:

true if the element was recognized, otherwise false.

initialize

protected void initialize(Element root)

Intialize a Discovery Query from a portion of a structured document.

Parameters:

root - document to intialize from

getDocument

public Document getDocument(MimeMediaType asMimeType)

Specified by:

getDocument in class DiscoveryQueryMsg

toString

public String toString()

Deprecated. should not be used. use getDocument().toString() instead.

return the string representaion of this doc

Overrides:

toString in class Object