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Diffstat (limited to 'bundles/org.eclipse.osgi/core/framework/org/eclipse/osgi/internal/serviceregistry/FilteredServiceListener.java')
| -rw-r--r-- | bundles/org.eclipse.osgi/core/framework/org/eclipse/osgi/internal/serviceregistry/FilteredServiceListener.java | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/bundles/org.eclipse.osgi/core/framework/org/eclipse/osgi/internal/serviceregistry/FilteredServiceListener.java b/bundles/org.eclipse.osgi/core/framework/org/eclipse/osgi/internal/serviceregistry/FilteredServiceListener.java deleted file mode 100644 index 528d8d2e6..000000000 --- a/bundles/org.eclipse.osgi/core/framework/org/eclipse/osgi/internal/serviceregistry/FilteredServiceListener.java +++ /dev/null @@ -1,205 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2003, 2010 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.osgi.internal.serviceregistry; - -import org.eclipse.osgi.framework.debug.Debug; -import org.eclipse.osgi.framework.internal.core.BundleContextImpl; -import org.eclipse.osgi.framework.internal.core.FilterImpl; -import org.osgi.framework.*; -import org.osgi.framework.hooks.service.ListenerHook; - -/** - * Service Listener delegate. - */ -class FilteredServiceListener implements ServiceListener, ListenerHook.ListenerInfo { - /** Filter for listener. */ - private final FilterImpl filter; - /** Real listener. */ - private final ServiceListener listener; - /** The bundle context */ - private final BundleContextImpl context; - /** is this an AllServiceListener */ - private final boolean allservices; - /** is this an UnfilteredServiceListener */ - private final boolean unfiltered; - /** an objectClass required by the filter */ - private final String objectClass; - /** indicates whether the listener has been removed */ - private volatile boolean removed; - - /** - * Constructor. - * - * @param context The bundle context of the bundle which added the specified service listener. - * @param filterstring The filter string specified when this service listener was added. - * @param listener The service listener object. - * @exception InvalidSyntaxException if the filter is invalid. - */ - FilteredServiceListener(final BundleContextImpl context, final ServiceListener listener, final String filterstring) throws InvalidSyntaxException { - this.unfiltered = (listener instanceof UnfilteredServiceListener); - if (filterstring == null) { - this.filter = null; - this.objectClass = null; - } else { - FilterImpl filterImpl = FilterImpl.newInstance(filterstring); - String clazz = filterImpl.getRequiredObjectClass(); - if (unfiltered || (clazz == null)) { - this.objectClass = null; - this.filter = filterImpl; - } else { - this.objectClass = clazz.intern(); /*intern the name for future identity comparison */ - this.filter = filterstring.equals(getObjectClassFilterString(this.objectClass)) ? null : filterImpl; - } - } - this.removed = false; - this.listener = listener; - this.context = context; - this.allservices = (listener instanceof AllServiceListener); - } - - /** - * Receives notification that a service has had a lifecycle change. - * - * @param event The <code>ServiceEvent</code> object. - */ - public void serviceChanged(ServiceEvent event) { - ServiceReferenceImpl<?> reference = (ServiceReferenceImpl<?>) event.getServiceReference(); - - // first check if we can short circuit the filter match if the required objectClass does not match the event - objectClassCheck: if (objectClass != null) { - String[] classes = reference.getClasses(); - int size = classes.length; - for (int i = 0; i < size; i++) { - if (classes[i] == objectClass) // objectClass strings have previously been interned for identity comparison - break objectClassCheck; - } - return; // no class in this event matches a required part of the filter; we do not need to deliver this event - } - // TODO could short circuit service.id filters as well since the id is constant for a registration. - - if (!ServiceRegistry.hasListenServicePermission(event, context)) - return; - - if (Debug.DEBUG_EVENTS) { - String listenerName = this.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(this)); //$NON-NLS-1$ - Debug.println("filterServiceEvent(" + listenerName + ", \"" + getFilter() + "\", " + reference.getRegistration().getProperties() + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ - } - - event = filterMatch(event); - if (event == null) { - return; - } - if (allservices || ServiceRegistry.isAssignableTo(context, reference)) { - if (Debug.DEBUG_EVENTS) { - String listenerName = listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)); //$NON-NLS-1$ - Debug.println("dispatchFilteredServiceEvent(" + listenerName + ")"); //$NON-NLS-1$ //$NON-NLS-2$ - } - - listener.serviceChanged(event); - } - } - - /** - * Returns a service event that should be delivered to the listener based on the filter evaluation. - * This may result in a service event of type MODIFIED_ENDMATCH. - * - * @param delivered The service event delivered by the framework. - * @return The event to be delivered or null if no event is to be delivered to the listener. - */ - private ServiceEvent filterMatch(ServiceEvent delivered) { - boolean modified = delivered.getType() == ServiceEvent.MODIFIED; - ServiceEvent event = modified ? ((ModifiedServiceEvent) delivered).getModifiedEvent() : delivered; - if (unfiltered || (filter == null)) { - return event; - } - ServiceReference<?> reference = event.getServiceReference(); - if (filter.match(reference)) { - return event; - } - if (modified) { - ModifiedServiceEvent modifiedServiceEvent = (ModifiedServiceEvent) delivered; - if (modifiedServiceEvent.matchPreviousProperties(filter)) { - return modifiedServiceEvent.getModifiedEndMatchEvent(); - } - } - // does not match and did not match previous properties; do not send event - return null; - } - - /** - * The string representation of this Filtered listener. - * - * @return The string representation of this listener. - */ - public String toString() { - String filterString = getFilter(); - if (filterString == null) { - filterString = ""; //$NON-NLS-1$ - } - return listener.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(listener)) + filterString; //$NON-NLS-1$ - } - - /** - * Return the bundle context for the ListenerHook. - * @return The context of the bundle which added the service listener. - * @see org.osgi.framework.hooks.service.ListenerHook.ListenerInfo#getBundleContext() - */ - public BundleContext getBundleContext() { - return context; - } - - /** - * Return the filter string for the ListenerHook. - * @return The filter string with which the listener was added. This may - * be <code>null</code> if the listener was added without a filter. - * @see org.osgi.framework.hooks.service.ListenerHook.ListenerInfo#getFilter() - */ - public String getFilter() { - if (filter != null) { - return filter.toString(); - } - return getObjectClassFilterString(objectClass); - } - - /** - * Return the state of the listener for this addition and removal life - * cycle. Initially this method will return <code>false</code> - * indicating the listener has been added but has not been removed. - * After the listener has been removed, this method must always return - * <code>true</code>. - * - * @return <code>false</code> if the listener has not been been removed, - * <code>true</code> otherwise. - */ - public boolean isRemoved() { - return removed; - } - - /** - * Mark the service listener registration as removed. - */ - void markRemoved() { - removed = true; - } - - /** - * Returns an objectClass filter string for the specified class name. - * @return A filter string for the specified class name or <code>null</code> if the - * specified class name is <code>null</code>. - */ - private static String getObjectClassFilterString(String className) { - if (className == null) { - return null; - } - return "(" + Constants.OBJECTCLASS + "=" + className + ")"; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ - } -} |