95 lines
3.5 KiB
Java
95 lines
3.5 KiB
Java
// ============================================================================
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//
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// Copyright (C) 2006-2018 Talend Inc. - www.talend.com
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//
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// This source code is available under agreement available at
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// %InstallDIR%\features\org.talend.rcp.branding.%PRODUCTNAME%\%PRODUCTNAME%license.txt
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//
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// You should have received a copy of the agreement
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// along with this program; if not, write to Talend SA
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// 9 rue Pages 92150 Suresnes, France
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//
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// ============================================================================
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package routines.system;
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import java.lang.reflect.Method;
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public final class BundleUtils {
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private static final Class<?> BUNDLE_CONTEXT_CLASS;
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private static final Class<?> SERVICE_REFERENCE_CLASS;
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private static final Object BUNDLE;
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static {
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Class<?> bundleCtxClass;
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Class<?> svcRefClass;
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Object bundle;
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try {
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ClassLoader ld = BundleUtils.class.getClassLoader();
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Class<?> util = ld.loadClass("org.osgi.framework.FrameworkUtil");
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bundleCtxClass = ld.loadClass("org.osgi.framework.BundleContext");
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svcRefClass = ld.loadClass("org.osgi.framework.ServiceReference");
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Method getBundle = util.getMethod("getBundle", Class.class);
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bundle = getBundle.invoke(null, BundleUtils.class);
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} catch (Exception e) {
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bundleCtxClass = null;
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svcRefClass = null;
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bundle = null;
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}
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BUNDLE_CONTEXT_CLASS = bundleCtxClass;
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SERVICE_REFERENCE_CLASS = svcRefClass;
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BUNDLE = bundle;
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}
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public static <T> T getService(Class<T> svcClass) {
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if (BUNDLE == null) {
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return null;
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}
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try {
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Method getBundleContext = BUNDLE.getClass().getMethod("getBundleContext");
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Object context = getBundleContext.invoke(BUNDLE);
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Class<?> ctxClass = context.getClass();
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Method getServiceReference = ctxClass.getMethod("getServiceReference", Class.class);
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Object serviceReference = getServiceReference.invoke(context, svcClass);
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Method getService = ctxClass.getMethod("getService", SERVICE_REFERENCE_CLASS);
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return svcClass.cast(getService.invoke(context, serviceReference));
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} catch (Exception e) {
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return null;
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}
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}
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public static <T> T getService(Class<T> svcClass, Object bundleContext) {
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if (BUNDLE_CONTEXT_CLASS == null || bundleContext == null) {
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return null;
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}
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if (!BUNDLE_CONTEXT_CLASS.isInstance(bundleContext)) {
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return null;
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}
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try {
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Class<?> ctxClass = bundleContext.getClass();
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Method getServiceReference = ctxClass.getMethod("getServiceReference", Class.class);
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Object serviceReference = getServiceReference.invoke(bundleContext, svcClass);
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Method getService = ctxClass.getMethod("getService", SERVICE_REFERENCE_CLASS);
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return svcClass.cast(getService.invoke(bundleContext, serviceReference));
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} catch (Exception e) {
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return null;
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}
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}
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public static boolean inOSGi() {
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return BUNDLE != null;
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}
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public static Class<?> getBundleContextClass() throws ClassNotFoundException {
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if (BUNDLE_CONTEXT_CLASS == null) {
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throw new ClassNotFoundException(
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"Class org.osgi.framework.BundleContext cannot be resolved. ");
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}
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return BUNDLE_CONTEXT_CLASS;
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}
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private BundleUtils() {
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super();
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}
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}
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