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/**
 *  Copyright 2011-2013 Terracotta, Inc.
 *  Copyright 2011-2013 Oracle America Incorporated
 *
 *  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.jsr107.ri.annotations;

import java.lang.annotation.Annotation;

/**
 * Base class for all interceptor implementations, contains utility methods
 *
 * @param  The intercepted method invocation
 * @param  The type of static invocation context data expected
 * @author Eric Dalquist
 * @since 1.0
 */
public abstract class AbstractKeyedCacheInterceptor> extends AbstractCacheInterceptor {

  /**
   * Get, check the {@link InterceptorType} and cast the {@link CacheMethodDetailsImpl} for the invocation.
   *
   * @param cacheInvocationContext The invocation context to get the {@link CacheMethodDetailsImpl} from.
   * @param interceptorType        The current interceptor type, used for validation.
   * @return The casted {@link CacheMethodDetailsImpl} object.
   */
  @SuppressWarnings("unchecked")
  protected T getStaticCacheKeyInvocationContext(
      final InternalCacheKeyInvocationContext cacheInvocationContext, final InterceptorType interceptorType) {

    final StaticCacheKeyInvocationContext staticCacheKeyInvocationContext =
        cacheInvocationContext.getStaticCacheKeyInvocationContext();

    if (staticCacheKeyInvocationContext.getInterceptorType() != interceptorType) {
      throw new IllegalStateException("AroundInvoke method for " + interceptorType + " called but MethodDetails.InterceptorType is " +
          staticCacheKeyInvocationContext.getInterceptorType());
    }

    return (T) staticCacheKeyInvocationContext;
  }

}