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 *     Anahide Tchertchian
018 */
019package org.nuxeo.ecm.core.api.externalblob;
020
021import java.io.File;
022import java.io.IOException;
023
024import org.nuxeo.ecm.core.api.Blob;
025import org.nuxeo.ecm.core.api.Blobs;
026import org.nuxeo.ecm.core.api.PropertyException;
027
028/**
029 * File system external adapter that takes the "container" property to set the absolute path of the container folder on
030 * the file system.
031 *
032 * @author Anahide Tchertchian
033 */
034public class FileSystemExternalBlobAdapter extends AbstractExternalBlobAdapter {
035
036    private static final long serialVersionUID = 1L;
037
038    public static final String CONTAINER_PROPERTY_NAME = "container";
039
040    public String getFileAbsolutePath(String localPath) throws PropertyException {
041        String container = getProperty(CONTAINER_PROPERTY_NAME);
042        if (container == null) {
043            throw new PropertyException(String.format("External blob adapter with prefix '%s' "
044                    + "and class '%s' is missing the '%s' property", getPrefix(), getClass().getName(),
045                    CONTAINER_PROPERTY_NAME));
046        }
047        container = container.trim();
048        if (!container.endsWith(File.separator)) {
049            return String.format("%s%s%s", container, File.separator, localPath);
050        } else {
051            return String.format("%s%s", container, localPath);
052        }
053    }
054
055    @Override
056    public Blob getBlob(String uri) throws PropertyException, IOException {
057        String localPath = getLocalName(uri);
058        String path = getFileAbsolutePath(localPath);
059        File file = new File(path);
060        if (!file.exists()) {
061            throw new PropertyException(String.format("Cannot find file at '%s'", path));
062        }
063        Blob blob = Blobs.createBlob(file);
064        blob.setFilename(file.getName());
065        return blob;
066    }
067}