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Diffstat (limited to 'bundles/org.eclipse.equinox.registry/src/org/eclipse/equinox/registry/RegistryUtils.java')
-rw-r--r--bundles/org.eclipse.equinox.registry/src/org/eclipse/equinox/registry/RegistryUtils.java92
1 files changed, 92 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.registry/src/org/eclipse/equinox/registry/RegistryUtils.java b/bundles/org.eclipse.equinox.registry/src/org/eclipse/equinox/registry/RegistryUtils.java
new file mode 100644
index 000000000..aae75e683
--- /dev/null
+++ b/bundles/org.eclipse.equinox.registry/src/org/eclipse/equinox/registry/RegistryUtils.java
@@ -0,0 +1,92 @@
+/*******************************************************************************
+ * Copyright (c) 2005 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.equinox.registry;
+
+import java.io.File;
+import org.eclipse.core.internal.registry.IRegistryConstants;
+import org.eclipse.core.internal.registry.RegistryMessages;
+import org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI;
+import org.eclipse.core.runtime.*;
+import org.eclipse.equinox.registry.spi.RegistryStrategy;
+import org.osgi.framework.Bundle;
+
+/**
+ * Collection of utility methods related to the extension registry
+ * functionality.
+ *
+ * This class is not intended to be subclassed or instantiated.
+ *
+ * @since org.eclipse.equinox.registry 1.0
+ */
+public final class RegistryUtils {
+
+ private static IRegistryProvider defaultRegistryProvider;
+
+ /**
+ * Creates registry strategy that can be used in OSGi world. It provides the following functionality:
+ * - Event scheduling is done using Eclipse job scheduling mechanism
+ * - Translation is done with Equinox ResourceTranslator
+ * - Uses OSGi bundle model for namespace resolution
+ * - Uses bunlde-based class loaders to create executable extensions
+ * - Registry is filled with information stored in plugin.xml / fragment.xml files of OSGi bundles
+ * with the XML parser is obtained via an OSGi service
+ * - Performs registry validation based on the time stamps of the plugin.xml / fragment.xml files
+ *
+ * @param storageDir - file system directory to store cache files; might be null
+ * @param cacheReadOnly - true: cache is read only; false: cache is read/write
+ * @param token - control token for the registry
+ */
+ public static RegistryStrategy createOSGiStrategy(File storageDir, boolean cacheReadOnly, Object token) {
+ return new RegistryStrategyOSGI(storageDir, cacheReadOnly, token);
+ }
+
+ /**
+ * Returns Id corresponding to the OSGi bundle.
+ * @see IExtensionRegistry#addContribution
+ * @param bundle - OSGi bundle
+ * @return Id used for the OSGi bundle
+ */
+ public static String getContributorId(Bundle bundle) {
+ return RegistryStrategyOSGI.getId(bundle);
+ }
+
+ /**
+ * Returns the existing extension registry specified by the registry provider.
+ * May return null is the provider has not been set or registry was not created.
+ *
+ * @return existing extension registry or null
+ */
+ public static IExtensionRegistry getRegistryFromProvider() {
+ if (defaultRegistryProvider == null)
+ return null;
+ return defaultRegistryProvider.getRegistry();
+ }
+
+ /**
+ * Use this method to specify the default registry provider. The default registry provider
+ * is immutable in the sense that it can be set only once during the application runtime.
+ * Attempts to change the default registry provider will cause CoreException.
+ *
+ * @see #getRegistry()
+ *
+ * <b>This is an experimental API. It might change in future.</b>
+ *
+ * @param provider - extension registry provider
+ * @throws CoreException - default registry provider was already set for this application
+ */
+ public static void setRegistryProvider(IRegistryProvider provider) throws CoreException {
+ if (defaultRegistryProvider != null) {
+ Status status = new Status(IStatus.ERROR, RegistryMessages.OWNER_NAME, IRegistryConstants.PLUGIN_ERROR, RegistryMessages.registry_default_exists, null);
+ throw new CoreException(status);
+ }
+ defaultRegistryProvider = provider;
+ }
+}

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