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Diffstat (limited to 'libjava/java/beans/beancontext/BeanContextServices.java')
| -rw-r--r-- | libjava/java/beans/beancontext/BeanContextServices.java | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/libjava/java/beans/beancontext/BeanContextServices.java b/libjava/java/beans/beancontext/BeanContextServices.java deleted file mode 100644 index e67687b6efe..00000000000 --- a/libjava/java/beans/beancontext/BeanContextServices.java +++ /dev/null @@ -1,195 +0,0 @@ -/* 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. - -As a special exception, if you link this library with other files to -produce an executable, this library does not by itself cause the -resulting executable to be covered by the GNU General Public License. -This exception does not however invalidate any other reasons why the -executable file might be covered by the GNU General Public License. */ - - -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); -} |