CachedStoreUtils.java

/*
 * Distributed as part of mchange-commons-java 0.2.11
 *
 * Copyright (C) 2015 Machinery For Change, Inc.
 *
 * Author: Steve Waldman <swaldman@mchange.com>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of EITHER:
 *
 *     1) The GNU Lesser General Public License (LGPL), version 2.1, as 
 *        published by the Free Software Foundation
 *
 * OR
 *
 *     2) The Eclipse Public License (EPL), version 1.0
 *
 * You may choose which license to accept if you wish to redistribute
 * or modify this work. You may offer derivatives of this work
 * under the license you have chosen, or you may provide the same
 * choice of license which you have been offered here.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received copies of both LGPL v2.1 and EPL v1.0
 * along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
 * If not, the text of these licenses are currently available at
 *
 * LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 *  EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php 
 * 
 */

package com.mchange.v1.cachedstore;

import com.mchange.lang.PotentiallySecondary;
import com.mchange.v1.lang.Synchronizer;

public final class CachedStoreUtils
{
    final static boolean DEBUG = true;

    public static CachedStore synchronizedCachedStore(CachedStore orig)
    { return (CachedStore) Synchronizer.createSynchronizedWrapper( orig );  }

    public static TweakableCachedStore synchronizedTweakableCachedStore(TweakableCachedStore orig)
    { return (TweakableCachedStore) Synchronizer.createSynchronizedWrapper( orig );  }

    public static WritableCachedStore synchronizedWritableCachedStore(WritableCachedStore orig)
    { return (WritableCachedStore) Synchronizer.createSynchronizedWrapper( orig );  }

    public static CachedStore untweakableCachedStore(final TweakableCachedStore orig)
    {
	return new CachedStore()
	    {
		public Object find(Object key) throws CachedStoreException
		{ return orig.find( key ); }

		public void reset() throws CachedStoreException
		{ orig.reset(); }
	    };
    }

    static CachedStoreException toCachedStoreException( Throwable t )
    {
	if (DEBUG) t.printStackTrace();

	if (t instanceof CachedStoreException)
	    return (CachedStoreException) t;
	else if (t instanceof PotentiallySecondary)
	    {
		Throwable t2 = ((PotentiallySecondary) t).getNestedThrowable();
		if (t2 instanceof CachedStoreException)
		    return (CachedStoreException) t2;
	    }
	return new CachedStoreException( t );
	    
    }

    static CacheFlushException toCacheFlushException( Throwable t )
    {
	if (DEBUG) t.printStackTrace();

	if (t instanceof CacheFlushException)
	    return (CacheFlushException) t;
	else 
	    return new CacheFlushException( t );
	    
    }

    private CachedStoreUtils()
    {}
}