X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;ds=sidebyside;f=org.argeo.cms.e4%2Fsrc%2Forg%2Fargeo%2Fcms%2Fe4%2FOsgiFilterContextFunction.java;fp=org.argeo.cms.e4%2Fsrc%2Forg%2Fargeo%2Fcms%2Fe4%2FOsgiFilterContextFunction.java;h=c42a02a147ab64ccf468c3383d7a057a04e5778e;hb=5b3108fe285bca50565b58b63fa4feddc96c0765;hp=0000000000000000000000000000000000000000;hpb=e54c6091d38b6859dec42f36e7334da19e2a0227;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.cms.e4/src/org/argeo/cms/e4/OsgiFilterContextFunction.java b/org.argeo.cms.e4/src/org/argeo/cms/e4/OsgiFilterContextFunction.java
new file mode 100644
index 000000000..c42a02a14
--- /dev/null
+++ b/org.argeo.cms.e4/src/org/argeo/cms/e4/OsgiFilterContextFunction.java
@@ -0,0 +1,33 @@
+package org.argeo.cms.e4;
+
+import org.argeo.cms.CmsException;
+import org.eclipse.e4.core.contexts.ContextFunction;
+import org.eclipse.e4.core.contexts.IEclipseContext;
+import org.eclipse.e4.core.di.IInjector;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.FrameworkUtil;
+import org.osgi.framework.InvalidSyntaxException;
+import org.osgi.framework.ServiceReference;
+
+/** An Eclipse 4 {@link ContextFunction} based on an OSGi filter. */
+public class OsgiFilterContextFunction extends ContextFunction {
+
+	private BundleContext bc = FrameworkUtil.getBundle(OsgiFilterContextFunction.class).getBundleContext();
+
+	@Override
+	public Object compute(IEclipseContext context, String contextKey) {
+		ServiceReference<?>[] srs;
+		try {
+			srs = bc.getServiceReferences((String) null, contextKey);
+		} catch (InvalidSyntaxException e) {
+			throw new CmsException("Context key " + contextKey + " must be a valid osgi filter", e);
+		}
+		if (srs == null || srs.length == 0) {
+			return IInjector.NOT_A_VALUE;
+		} else {
+			// return the first one
+			return bc.getService(srs[0]);
+		}
+	}
+
+}