ObjectSerializerDefinition.java

/*
 * Copyright 2014 Avanza Bank AB
 *
 * 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 com.avanza.astrix.versioning.core;

/**
 * 
 * @author Elias Lindholm (elilin)
 *
 */
public abstract class ObjectSerializerDefinition {

	public abstract boolean isVersioned();

	public abstract Class<? extends AstrixObjectSerializerConfigurer> getObjectSerializerConfigurerClass();

	public abstract int version();
	
	public static VersionedObjectSerializerDefinition versionedService(
			int version,
			Class<? extends AstrixObjectSerializerConfigurer> objectSerializerConfigurer) {
		return new VersionedObjectSerializerDefinition(version, objectSerializerConfigurer);
	}
	
	public static NonVersionedObjectSerializerDefinition nonVersioned() {
		return new NonVersionedObjectSerializerDefinition();
	}
	
	
	private static class VersionedObjectSerializerDefinition extends ObjectSerializerDefinition {
		
		private int version;
		private Class<? extends AstrixObjectSerializerConfigurer> objectSerializerConfiguer;
		
		public VersionedObjectSerializerDefinition(int version,
									   Class<? extends AstrixObjectSerializerConfigurer> objectSerializerConfiguer) {
			this.version = version;
			this.objectSerializerConfiguer = objectSerializerConfiguer;
		}

		@Override
		public boolean isVersioned() {
			return true;
		}
		
		@Override
		public int version() {
			return this.version;
		}

		@Override
		public Class<? extends AstrixObjectSerializerConfigurer> getObjectSerializerConfigurerClass() {
			return this.objectSerializerConfiguer;
		}
	}
	
	private static class NonVersionedObjectSerializerDefinition extends ObjectSerializerDefinition {

		@Override
		public boolean isVersioned() {
			return false;
		}
		
		@Override
		public int version() {
			throw new IllegalStateException("Non-versioned services does not provide a version");
		}

		@Override
		public Class<? extends AstrixObjectSerializerConfigurer> getObjectSerializerConfigurerClass() {
			throw new IllegalStateException("Non-versioned services does not provide a AstrixObjectSerializerConfigurer");
		}
	}

}