001/*
002 * (C) Copyright 2015 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 *     Florent Guillaume
018 */
019package org.nuxeo.ecm.core.blob;
020
021import java.io.IOException;
022import java.io.InputStream;
023
024import org.nuxeo.ecm.core.api.impl.blob.AbstractBlob;
025import org.nuxeo.runtime.api.Framework;
026
027/**
028 * Simple managed blob implementation holding just a key and delegating to its provider for implementation.
029 *
030 * @since 7.2
031 */
032public class SimpleManagedBlob extends AbstractBlob implements ManagedBlob {
033
034    private static final long serialVersionUID = 1L;
035
036    public final String key;
037
038    public Long length;
039
040    public SimpleManagedBlob(BlobInfo blobInfo) {
041        this.key = blobInfo.key;
042        setMimeType(blobInfo.mimeType);
043        setEncoding(blobInfo.encoding);
044        setFilename(blobInfo.filename);
045        setDigest(blobInfo.digest);
046        length = blobInfo.length;
047    }
048
049    @Override
050    public String getKey() {
051        return key;
052    }
053
054    @Override
055    public String getProviderId() {
056        int colon = key.indexOf(':');
057        if (colon < 0) {
058            // no prefix
059            throw new IllegalArgumentException("Invalid managed blob key: " + key);
060        }
061        return key.substring(0, colon);
062    }
063
064    @Override
065    public InputStream getStream() throws IOException {
066        return Framework.getService(BlobManager.class).getStream(this);
067    }
068
069    @Override
070    public long getLength() {
071        return length == null ? -1 : length.longValue();
072    }
073
074}