+++ /dev/null
-/* java.beans.beancontext.BeanContextServices
- Copyright (C) 1999 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package java.beans.beancontext;
-
-import java.util.Iterator;
-
-/**
- * Allows a <code>BeanContext</code> to provide services to its children.
- *
- * @specnote it is unclear whether a <code>BeanContextServices</code>
- * should delegate unhandled requests to parents. I assume so.
- * @author John Keiser
- * @since JDK1.2
- */
-
-public interface BeanContextServices extends BeanContext, BeanContextServicesListener {
- /**
- * Register a service to make it available to others.
- * This class may refuse to add the service based on whatever
- * information it can gather, including whether the service
- * provider is trusted.
- *
- * @param serviceClass the service class.
- * @param provider the factory that will actually provide the service.
- * @return whether the service was added or not.
- */
- public boolean addService(Class serviceClass, BeanContextServiceProvider provider);
-
- /**
- * Make it so that no one else can use this service.
- * <P>
- *
- * If <code>revokeNow</code> is <code>false</code>, the only
- * effect of this method is to make all subsequent calls to
- * <code>getService()</code> on this service class fail.
- * <P>
- *
- * If it is <code>true</code>, a message is also sent out to all
- * listeners on the service and all references to it are released.
- *
- * @param serviceClass the service class to revoke.
- * @param provider the service provider providing the service class.
- * @param revokeNow whether to release all current references to
- * the service.
- */
- public void revokeService(Class serviceClass, BeanContextServiceProvider provider, boolean revokeNow);
-
- /**
- * Release your copy of this service.
- * <P>
- *
- * If all copies of the service's class have been relinquished by
- * the requestor, the <code>BeanContextServiceRevokedListener</code>
- * previously registered by <code>getService()</code> will be
- * unregistered.
- *
- * @param requestorChild the original <code>BeanContextChild</code>
- * requesting the service.
- * @param requestor the original requestor of the service.
- * @param service the service to relinquish
- * @see #getService(java.beans.beancontext.BeanContextChild,java.lang.Object,java.lang.Class,java.lang.Object,java.beans.beancontext.BeanContextServiceRevokedListener)
- */
- public void releaseService(BeanContextChild requestorChild, Object requestor, Object service);
-
- /**
- * Get a service from this <code>BeanContextServices</code>.
- * <P>
- *
- * The specified listener will be registered to receive a
- * revocation notice for the specified serviceClass. One
- * notification per service class per requestor object will be
- * sent.
- * <P>
- *
- * The listener will be unregistered when all services that were
- * obtained by that requestor for that service class are released.
- * <P>
- *
- * If the requested service class is not available, or if this
- * <code>BeanContextServices</code> object chooses not honor the
- * request because the service class has been revoked or for some
- * other reason, then this method will return <code>null</code>.
- * <P>
- *
- * This method may throw unchecked exceptions, so watch out.
- *
- * @specnote it is not specified what happens when two subsequent
- * calls are made to <code>getService()</code> with the
- * same requestor object and service class but different
- * listeners. Which listener is to be notified?
- *
- * @param requestorChild the <code>BeanContextChild</code>
- * associated with the requestor. Typically this will be
- * the same as the requestor itself, but since any
- * <code>Object</code>, even one outside the hierarchy, may
- * make a request, this parameter is necessary. Only weak
- * references to this will be retained, and it will never
- * be changed, only queried in a read-only manner.
- * @param requestor the actual requestor of the service. Only
- * weak references to this will be retained, and it will
- * never be changed, only queried in a read-only manner.
- * @param serviceClass the <code>Class</code> of the service being
- * requested.
- * @param serviceSelector a parameter to customize the service
- * returned with.
- * @param listener a listener that will be notified if the service
- * being requested is revoked.
- * @return an instance of <code>serviceClass</code> (such that
- * <code>instanceof</code> serviceClass is true), or
- * <code>null</code>.
- */
- public Object getService(BeanContextChild requestorChild, Object requestor, Class serviceClass, Object serviceSelector, BeanContextServiceRevokedListener listener);
-
- /**
- * Get a list of all service classes supported.
- * <P>
- *
- * This method must synchronize on
- * <code>BeanContext.globalHierarchyLock</code>.
- *
- * @return a list of all service classes supported.
- * @see java.beans.beancontext.BeanContext#globalHierarchyLock
- */
- public Iterator getCurrentServiceClasses();
-
- /**
- * Get a list of valid service selectors for the specified service class.
- * <P>
- *
- * If the specified service class does not have a finite number of
- * valid service selectors, it should return <code>null</code>.
- * If it takes a general <code>Integer</code> parameter, for
- * example, you may as well return <code>null</code> or the poor
- * soul who called this method will be iterating all day.
- * <P>
- *
- * If it has no valid service selectors, it should still return an empty
- * <code>Iterator</code>.
- *
- * @param serviceClass the service class to get selectors for.
- * @return a list of valid service selectors for the service
- * class, or <code>null</code>.
- */
- public Iterator getCurrentServiceSelectors(Class serviceClass);
-
- /**
- * Tell whether the specified service class is available.
- * Iff getService() could return a non-null value for the
- * specified service, this method will return <code>true</code>.
- *
- * @param serviceClass the service class to check on.
- * @return whether the specified service class is availabe.
- */
- public boolean hasService(Class serviceClass);
-
- /**
- * Add a listener on all adds and removes of services.
- * @param listener the listener to add.
- */
- public void addBeanContextServicesListener(BeanContextServicesListener listener);
-
- /**
- * Remove a listener on all adds and removes of services.
- * @specnote it is not certain whether this should remove this
- * listener if it was specified in
- * <code>getService()</code>.
- * @param listener the listener to add.
- */
- public void removeBeanContextServicesListener(BeanContextServicesListener listener);
-}
projects / msp430-gcc.git / blobdiff