Difference between revisions of "Documentation/DevGuide/WritingUNO/Implementing without Helpers"

  // source file com/sun/star/uno/XInterface.java corresponding to the class generated by
 
  package com.sun.star.uno;
 
  public interface XInterface
  {
      // static Member
      public static final com.sun.star.lib.uno.typeinfo.TypeInfo UNOTYPEINFO[] = null;
  }

  ...
 
  // XTypeProvider implementation
 
  // maintain a static implementation id for all instances of ImageShrink
  // initialized by the first call to getImplementationId()
  protected static byte[] _implementationId;
 
  public com.sun.star.uno.Type[] getTypes() {
 
      // instantiate Type instances for each interface you support and place them in a Type[] array
      // (this object supports XServiceInfo, XTypeProvider, and XImageShrinkFilter)
      return new com.sun.star.uno.Type[] {
          new com.sun.star.uno.Type(com.sun.star.lang.XServiceInfo.class),
          new com.sun.star.uno.Type(com.sun.star.lang.XTypeProvider.class),
          new com.sun.star.uno.Type(org.openoffice.test.XImageShrinkFilter.class) };
  }
 
  synchronized public byte[] getImplementationId() {
      if (_implementationId == null) {
          _implementationId= new byte[16];
          int hash = hashCode(); // hashCode of this object
          _implementationId[0] = (byte)(hash & 0xff);
          _implementationId[1] = (byte)((hash >>> 8) & 0xff);
          _implementationId[2] = (byte)((hash >>> 16) & 0xff);
          _implementationId[3] = (byte)((hash >>>24) & 0xff);
      }
      return _implementationId;
  }
 
  ...

  ...
 
  //XComponent implementation
 
  // hold a list of eventListeners
  private java.util.ArrayList eventListeners = new java.util.ArrayList();
 
  public void dispose {
      java.util.ArrayList listeners;
      synchronized (this) {
          listeners = eventListeners;
          eventListeners = null;
      }
      for (java.util.Iterator i = listeners.iterator(); i.hasNext();) {
          fireDisposing((XEventListener) i.next());
      }
      releaseReferences();
  }
 
  public void addEventListener(XEventListener listener) {
      bool fire = false;
      synchronized (this) {
          if (eventListeners == null) {
              fire = true;
          } else {
              eventListeners.add(listener);
          }
      }
      if (fire) {
          fireDisposing(listener);
      }
  }
 
  public synchronized void removeEventListener(XEventListener listener) {
      if (eventListeners != null) {
          int i = eventListeners.indexOf(listener);
          if (i >= 0) {
              eventListeners.remove(i);
          }
      }
  }
 
  private void fireDisposing(XEventListener listener) {
      com.sun.star.uno.EventObject event = new com.sun.star.uno.EventObject(this);
      try {
          listener.disposing(event);
      } catch (com.sun.star.uno.DisposedException e) {
          // it is not an error if some listener is disposed simultaneously
      }
  }
 
  private void releaseReferences() {
      xComponentContext = null;
      // ...
  }