AssociationResolver.java

/*
 * Copyright (c) 2010-2016. Axon Framework
 * Licensed 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.axonframework.eventhandling.saga;

import org.axonframework.eventhandling.EventMessage;
import org.axonframework.messaging.annotation.MessageHandlingMember;

/**
 * Used to derive the value of an association property as designated by the association property name.
 * 
 * @author Sofia Guy Ang
 */
public interface AssociationResolver {

    /**
     * Validates that the associationPropertyName supplied is compatible with the handler.
     */
    <T> void validate(String associationPropertyName, MessageHandlingMember<T> handler);

    /**
     * Resolves the associationPropertyName as a value.
     */
    <T> Object resolve(String associationPropertyName, EventMessage<?> message, MessageHandlingMember<T> handler);
}