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 /*
  * JBoss, Home of Professional Open Source
  * Copyright 2013, Red Hat, Inc., and individual contributors
  * by the @authors tag. See the copyright.txt in the distribution for a
  * full listing of individual contributors.
  *
  * 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.jboss.weld.util.cache;
Guava loading cache utilities.

Author(s):
Martin Kouba
public final class LoadingCacheUtils {
    private LoadingCacheUtils() {
    }

    
Get the cache value for the given key.

Parameters:
cache
key
<K> Key type
<V> Value type
Returns:
the cache value
Throws:
com.google.common.util.concurrent.ExecutionError if an error is thrown while loading the value
    public static <K, V> V getCacheValue(LoadingCache<K, V> cache, K key) {
        try {
            return cache.get(key);
        } catch (ExecutionException e) {
            throw ..unableToLoadCacheValue(keye.getCause());
        } catch (UncheckedExecutionException e) {
            Throwable cause = e.getCause();
            if (cause instanceof RuntimeException) {
                throw (RuntimeExceptioncause;
            }
            throw ..unableToLoadCacheValue(keycause);
        }
    }

    
Get and cast the cache value for the given key.

Parameters:
cache
key
<T> Required type
<K> Key type
<V> Value type
Returns:
the cache value cast to the required type
Throws:
com.google.common.util.concurrent.ExecutionError if an error is thrown while loading the value
    @SuppressWarnings("unchecked")
    public static <T, K, V> T getCastCacheValue(LoadingCache<K, V> cacheObject key) {
        return (T) getCacheValue(cache, (K) key);
    }
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