AbstractOsgiComposite.java

   1 package org.argeo.cms.e4.maintenance;
   2
   3 import java.util.Collection;
   4
   5 import org.argeo.api.cms.CmsLog;
   6 import org.argeo.cms.swt.CmsSwtUtils;
   7 import org.eclipse.swt.SWT;
   8 import org.eclipse.swt.layout.GridData;
   9 import org.eclipse.swt.widgets.Composite;
  10 import org.osgi.framework.BundleContext;
  11 import org.osgi.framework.FrameworkUtil;
  12 import org.osgi.framework.InvalidSyntaxException;
  13 import org.osgi.framework.ServiceReference;
  14
  15 abstract class AbstractOsgiComposite extends Composite {
  16         private static final long serialVersionUID = -4097415973477517137L;
  17         protected final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
  18         protected final CmsLog log = CmsLog.getLog(getClass());
  19
  20         public AbstractOsgiComposite(Composite parent, int style) {
  21                 super(parent, style);
  22                 parent.setLayout(CmsSwtUtils.noSpaceGridLayout());
  23                 setLayout(CmsSwtUtils.noSpaceGridLayout());
  24                 setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
  25                 initUi(style);
  26         }
  27
  28         protected abstract void initUi(int style);
  29
  30         protected <T> T getService(Class<? extends T> clazz) {
  31                 return bc.getService(bc.getServiceReference(clazz));
  32         }
  33
  34         protected <T> Collection<ServiceReference<T>> getServiceReferences(Class<T> clazz, String filter) {
  35                 try {
  36                         return bc.getServiceReferences(clazz, filter);
  37                 } catch (InvalidSyntaxException e) {
  38                         throw new IllegalArgumentException("Filter " + filter + " is invalid", e);
  39                 }
  40         }
  41 }