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package javax.enterprise.deploy.spi;

/**
 * A TargetModuleID interface represents a unique
 * identifier for a deployed application module. 
 * A deployable application module can be an EAR, 
 * JAR, WAR or RAR file.  
 *
 * A TargetModuleID can represent a root module or 
 * a child module.  A root module TargetModuleID 
 * has no parent.  It represents a deployed EAR 
 * file or stand alone module.  A child module
 * TargetModuleID represents a deployed sub module
 * of a J2EE application. 
 *
 * A child TargetModuleID has only one parent,
 * the super module it was bundled and deployed
 * with.
 *
 * The identifier consists of the target name
 * and the unique identifier for the deployed
 * application module. 
 */
public interface TargetModuleID
{
   /**
    * Retrieve the name of the target server.
    * this module was deployed to.
    *
    * @return Target an object representing
    *         a server target.
    */
   public Target getTarget();

   /**
    * Retrieve the id assigned to represent
    * the deployed module.
    */
   public String getModuleID();


   /**
    * If this TargetModulID represents a web
    * module retrieve the URL for it.
    * 
    * @return the URL of a web module or null
    *         if the module is not a web module.
    */
   public String getWebURL();

   /**
    * Retrieve the identifier representing
    * the deployed module.
    */
   public String toString();

   /**
    * Retrieve the identifier of the parent
    * object of this deployed module. If there
    * is no parent then this is the root object
    * deployed.  The root could represent an EAR 
    * file or it could be a stand alone module 
    * that was deployed.
    *
    * @return the TargetModuleID of the parent
    *         of this object. A <code>null</code>
    *         value means this module is the root
    *         object deployed.
    */
   public TargetModuleID getParentTargetModuleID();

   /**
    * Retrieve a list of identifiers of the children
    * of this deployed module.
    *
    * @return a list of TargetModuleIDs identifying the 
    *         childern of this object. A <code>null</code>
    *         value means this module has no childern
    */
   public TargetModuleID[] getChildTargetModuleID();
}