CacheKeyGenerator.java

/*
 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * 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.
 *
 * Contributors:
 *     Nuxeo - initial API and implementation
 *
 */
package org.nuxeo.ecm.core.convert.cache;

import java.io.Serializable;
import java.util.Map;

import org.nuxeo.ecm.core.api.blobholder.BlobHolder;

/**
 * Simple helper to handle cache key generation.
 *
 * @author tiry
 */
public class CacheKeyGenerator {

    // Utility class.
    private CacheKeyGenerator() {
    }

    public static String computeKey(String converterName, BlobHolder blobHolder, Map<String, Serializable> parameters) {
        StringBuilder sb = new StringBuilder();
        sb.append(converterName);
        sb.append(":");
        sb.append(blobHolder.getHash());
        if (parameters != null) {
            for (String key : parameters.keySet()) {
                sb.append(":").append(key);
                sb.append(":").append(String.valueOf(parameters.get(key)));
            }
        }
        return sb.toString();
    }

}