001/*
002 * (C) Copyright 2012 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 *     Thomas Roger
018 */
019
020package org.nuxeo.ecm.csv.core;
021
022import java.io.IOException;
023import java.io.InputStream;
024
025import org.apache.commons.codec.digest.DigestUtils;
026import org.apache.commons.logging.Log;
027import org.apache.commons.logging.LogFactory;
028import org.nuxeo.ecm.core.api.Blob;
029
030/**
031 * Helper class to compute a unique id for an import task.
032 *
033 * @since 5.7.3
034 */
035public class CSVImportId {
036
037    private static final Log log = LogFactory.getLog(CSVImportId.class);
038
039    private CSVImportId() {
040        // utility class
041    }
042
043    public static String create(String repositoryName, String path, Blob blob) {
044        return create(repositoryName, path, computeDigest(blob));
045    }
046
047    public static String create(String repositoryName, String path, String csvBlobDigest) {
048        return repositoryName + ':' + path + ":csvImport:" + csvBlobDigest;
049    }
050
051    protected static String computeDigest(Blob blob) {
052        try (InputStream in = blob.getStream()) {
053            return DigestUtils.md5Hex(blob.getStream());
054        } catch (IOException e) {
055            log.error(e, e);
056            return "";
057        }
058    }
059
060}