001    /*
002     * Copyright 2002-2004 the original author or authors.
003     * 
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not
005     * use this file except in compliance with the License. You may obtain a copy of
006     * the License at
007     * 
008     * http://www.apache.org/licenses/LICENSE-2.0
009     * 
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
012     * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
013     * License for the specific language governing permissions and limitations under
014     * the License.
015     */
016    package org.springframework.richclient.command;
017    
018    /**
019     * Implementations of this interface can be assigned to an action command to
020     * intercept command execution.
021     * 
022     * @author Keith Donald, Mathias Broekelmann
023     */
024    public interface ActionCommandInterceptor {
025    
026            /**
027             * Will be called before the action command is executed.
028             * 
029             * @param command
030             *            the action command which gets executed
031             * @return If false the action command and any subsequent action command
032             *         interceptor will not get executed. If true the action command
033             *         will be executed.
034             */
035            public boolean preExecution(ActionCommand command);
036    
037            /**
038             * Will be called after successfull execution of an action command.
039             * 
040             * @param command
041             *            the action command which was executed.
042             */
043            public void postExecution(ActionCommand command);
044    }