1 files changed, 52 insertions, 0 deletions
diff --git a/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/cds/CDSHookConfigurator.java b/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/cds/CDSHookConfigurator.java
new file mode 100644
index 000000000..98f671178
--- /dev/null
+++ b/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/cds/CDSHookConfigurator.java
@@ -0,0 +1,52 @@
+/***********************************************************************
+ * IBM Confidential 
+ * OCO Source Materials
+ *
+ * (C) Copyright IBM Corp. 2006
+ *
+ * The source code for this program is not published or otherwise divested
+ * of its trade secrets, irrespective of what has been deposited with the
+ * U.S. Copyright Office.
+ ************************************************************************/
+
+package org.eclipse.osgi.internal.cds;
+
+import org.eclipse.osgi.internal.hookregistry.HookConfigurator;
+import org.eclipse.osgi.internal.hookregistry.HookRegistry;
+
+public class CDSHookConfigurator implements HookConfigurator {
+
+	private static final String SUPPRESS_ERRORS = "j9.cds.suppresserrors"; //$NON-NLS-1$
+	private static final String DISABLE_CDS = "j9.cds.disable"; //$NON-NLS-1$
+	private static final String OLD_CDS_CONFIGURATOR = "com.ibm.cds.CDSHookConfigurator"; //$NON-NLS-1$
+	private static final String J9_SHARED_CLASS_HELPER_CLASS = "com.ibm.oti.shared.SharedClassHelperFactory"; //$NON-NLS-1$
+
+	public void addHooks(HookRegistry hookRegistry) {
+		boolean disableCDS = "true".equals(hookRegistry.getConfiguration().getProperty(DISABLE_CDS)); //$NON-NLS-1$
+		if (disableCDS) {
+			return;
+		}
+		// check for the external com.ibm.cds system.bundle fragment
+		try {
+			Class.forName(OLD_CDS_CONFIGURATOR);
+			// the old com.ibm.cds fragment is installed; disable build-in one
+			return;
+		} catch (ClassNotFoundException e) {
+			// expected
+		}
+		try {
+			Class.forName(J9_SHARED_CLASS_HELPER_CLASS);
+		} catch (ClassNotFoundException e) {
+			boolean reportErrors = "false".equals(hookRegistry.getConfiguration().getProperty(SUPPRESS_ERRORS)); //$NON-NLS-1$
+			// not running on J9
+			if (reportErrors) {
+				System.err.println("The J9 Class Sharing Adaptor will not work in this configuration."); //$NON-NLS-1$
+				System.err.println("You are not running on a J9 Java VM."); //$NON-NLS-1$
+			}
+			return;
+		}
+
+		new CDSHookImpls().registerHooks(hookRegistry);
+	}
+
+}