001/*
002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Florent Guillaume
016 */
017package org.nuxeo.ecm.core.blob;
018
019import java.io.IOException;
020import java.io.InputStream;
021
022import org.nuxeo.ecm.core.api.impl.blob.AbstractBlob;
023import org.nuxeo.ecm.core.blob.BlobManager.BlobInfo;
024import org.nuxeo.runtime.api.Framework;
025
026/**
027 * Simple managed blob implementation holding just a key and delegating to its provider for implementation.
028 *
029 * @since 7.2
030 */
031public class SimpleManagedBlob extends AbstractBlob implements ManagedBlob {
032
033    private static final long serialVersionUID = 1L;
034
035    public final String key;
036
037    public Long length;
038
039    public SimpleManagedBlob(BlobInfo blobInfo) {
040        this.key = blobInfo.key;
041        setMimeType(blobInfo.mimeType);
042        setEncoding(blobInfo.encoding);
043        setFilename(blobInfo.filename);
044        setDigest(blobInfo.digest);
045        length = blobInfo.length;
046    }
047
048    @Override
049    public String getKey() {
050        return key;
051    }
052
053    @Override
054    public String getProviderId() {
055        int colon = key.indexOf(':');
056        if (colon < 0) {
057            // no prefix
058            throw new IllegalArgumentException("Invalid managed blob key: " + key);
059        }
060        return key.substring(0, colon);
061    }
062
063    @Override
064    public InputStream getStream() throws IOException {
065        return Framework.getService(BlobManager.class).getStream(this);
066    }
067
068    @Override
069    public long getLength() {
070        return length == null ? -1 : length.longValue();
071    }
072
073}