org.argeo.cms/src/org/argeo/cms/maintenance/AbstractOsgiComposite.java

   1 package org.argeo.cms.maintenance;
   2
   3 import java.util.Collection;
   4
   5 import org.apache.commons.logging.Log;
   6 import org.apache.commons.logging.LogFactory;
   7 import org.argeo.cms.util.CmsUtils;
   8 import org.eclipse.swt.SWT;
   9 import org.eclipse.swt.layout.GridData;
  10 import org.eclipse.swt.layout.GridLayout;
  11 import org.eclipse.swt.widgets.Composite;
  12 import org.osgi.framework.BundleContext;
  13 import org.osgi.framework.FrameworkUtil;
  14 import org.osgi.framework.InvalidSyntaxException;
  15 import org.osgi.framework.ServiceReference;
  16
  17 abstract class AbstractOsgiComposite extends Composite {
  18         private static final long serialVersionUID = -4097415973477517137L;
  19         protected final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
  20         protected final Log log = LogFactory.getLog(getClass());
  21
  22         public AbstractOsgiComposite(Composite parent, int style) {
  23                 super(parent, style);
  24                 parent.setLayout(CmsUtils.noSpaceGridLayout());
  25                 setLayout(CmsUtils.noSpaceGridLayout());
  26                 setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
  27                 initUi(style);
  28         }
  29
  30         protected abstract void initUi(int style);
  31
  32         protected <T> T getService(Class<? extends T> clazz) {
  33                 return bc.getService(bc.getServiceReference(clazz));
  34         }
  35
  36         protected <T> Collection<ServiceReference<T>> getServiceReferences(Class<T> clazz, String filter) {
  37                 try {
  38                         return bc.getServiceReferences(clazz, filter);
  39                 } catch (InvalidSyntaxException e) {
  40                         throw new IllegalArgumentException("Filter " + filter + " is invalid", e);
  41                 }
  42         }
  43 }