/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */
package org.apache.tuscany.sca.assembly;

import java.util.List;
import java.util.Set;


/**
 * Represents a consumer.
 * 
 * @version $$
 */
public interface Consumer extends EventTarget, Contract {

    
    List<EventSource> getSources();
    
    // Operation related information
    /**
     * Adds an operation to the consumer along with a list of the accepted event types.
     * If the event types are null, then any event type is accepted
     */
    void addOperation( String operationName, String eventTypes );
    
    /**
     * Gets the operations for this consumer, by name
     * @return
     */
    Set<String> getOperations();
    
    /**
     * Returns the operation which handles a given event type for this consumer
     * @param eventType - the event type name, which can be null (meaning "any event type")
     * @return the operation which handles this event type - null if no operation handles the event type
     */
    String getOperationByEventType( String eventType );

}