org.aspectj.weaver.tools.cache.AbstractCacheBacking Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of aspectjweaver Show documentation

The AspectJ weaver applies aspects to Java classes. It can be used as a Java agent in order to apply load-time weaving (LTW) during class-loading and also contains the AspectJ runtime classes.

There is a newer version: 1.9.22.1

Show newest version

/*******************************************************************************
 * Copyright (c) 2012 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *   John Kew (vmware)         	initial implementation
 *   Lyor Goldstein (vmware)	add support for weaved class being re-defined
 *******************************************************************************/
package org.aspectj.weaver.tools.cache;

import java.util.zip.CRC32;

import org.aspectj.weaver.tools.Trace;
import org.aspectj.weaver.tools.TraceFactory;

/**
 * Basic "common" {@link CacheBacking} implementation
 */
public abstract class AbstractCacheBacking implements CacheBacking {
    protected final Trace  logger=TraceFactory.getTraceFactory().getTrace(getClass());

	protected AbstractCacheBacking () {
		super();
	}

    /**
     * Calculates CRC32 on the provided bytes
     * @param bytes The bytes array - ignored if null/empty
     * @return Calculated CRC
     * @see CRC32
     */
    public static final long crc (byte[] bytes) {
        if ((bytes == null) || (bytes.length <= 0)) {
            return 0L;
        }

        CRC32   crc32=new CRC32();
        crc32.update(bytes);
        return crc32.getValue();
    }
}