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 /*
  * Copyright (c) 2010-2011. 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.commandhandling;

Interface towards a mechanism that is capable of extracting an Aggregate Identifier and Version form a command that identifies the aggregate instance the command should be invoked on.

Author(s):
Allard Buijze
Since:
1.2
public interface CommandTargetResolver {

    
Returns the Aggregate Identifier and optionally the expected version of the aggregate on which the given command should be executed. The version may be null if no specific version is required.

Parameters:
command The command from which to extract the identifier and version
Returns:
a VersionedAggregateIdentifier instance reflecting the aggregate to execute the command on
Throws:
java.lang.IllegalArgumentException if the command is not formatted correctly to extract this information
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