Instantiating the UCB

OpenOffice.org Developer's Guide

Universal Content Broker

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• Services and Interfaces
• Content Providers
• Using the UCB API

• Instantiating the UCB
• Accessing a UCB Content
• Executing Content Commands
• Obtaining Content Properties
• Setting Content Properties
• Folders
• Documents
• Managing Contents

• Creating
• Deleting
• Copying, Moving and Linking

• Configuration

• UCP Registration Information
• Unconfigured UCBs
• Preconfigured UCBs
• Content Provider Proxies

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The following steps have to be performed before a process can use the UCB:

• Create and set the UNO service manager.
• Create an instance of the UNO service com.sun.star.ucb.UniversalContentBroker, passing the keys identifying a predefined UCB configuration to createInstanceWithArguments().

There are several predefined UCB configurations. Each configuration contains data that describes a set of UCPs. All UCPs contained in a configuration are registered at the UCB that is created using this configuration. A UCB configuration is identified by two keys that are strings. The standard configuration is "Local" and "Office", which generally allows access to all UCPs available in a local installation.

  import com.sun.star.lang.XMultiServiceFactory;
  import com.sun.star.uno.Exception;
  import com.sun.star.uno.XInterface;
 
  boolean initUCB() {
 
      /////////////////////////////////////////////////////////////////////
      // Obtain Process Service Manager.
      /////////////////////////////////////////////////////////////////////
 
      XMultiServiceFactory xServiceFactory = ...
 
      /////////////////////////////////////////////////////////////////////
      // Create UCB. This needs to be done only once per process.
      /////////////////////////////////////////////////////////////////////
 
      XInterface xUCB;
      try {
          // Supply configuration to use for this UCB instance...
          String[] keys = new String[2];
          keys[ 0 ] = "Local";
          keys[ 1 ] = "Office";
 
          xUCB = xServiceFactory.createInstanceWithArguments(
              "com.sun.star.ucb.UniversalContentBroker", keys );
      }
      catch (com.sun.star.uno.Exception e) {
      }
 
      if (xUCB == null)
          return false;
 
      return true;
  }

For information about other configurations, refer to Configuration.

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