001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 *
019 */
020package org.nuxeo.ecm.core.convert.cache;
021
022import java.io.Serializable;
023import java.util.Map;
024
025import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
026
027/**
028 * Simple helper to handle cache key generation.
029 *
030 * @author tiry
031 */
032public class CacheKeyGenerator {
033
034    // Utility class.
035    private CacheKeyGenerator() {
036    }
037
038    public static String computeKey(String converterName, BlobHolder blobHolder, Map<String, Serializable> parameters) {
039        StringBuilder sb = new StringBuilder();
040        sb.append(converterName);
041        sb.append(":");
042        sb.append(blobHolder.getHash());
043        if (parameters != null) {
044            for (String key : parameters.keySet()) {
045                sb.append(":").append(key);
046                sb.append(":").append(String.valueOf(parameters.get(key)));
047            }
048        }
049        return sb.toString();
050    }
051
052}