001/*
002 * (C) Copyright 2002-2007 Nuxeo SAS (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.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 *     Nuxeo - initial API and implementation
016 *
017 */
018package org.nuxeo.ecm.platform.picture.convert;
019
020import java.io.Serializable;
021import java.util.ArrayList;
022import java.util.List;
023import java.util.Map;
024
025import org.nuxeo.ecm.core.api.Blob;
026import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
027import org.nuxeo.ecm.core.convert.api.ConversionException;
028import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder;
029import org.nuxeo.ecm.core.convert.extension.Converter;
030import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor;
031import org.nuxeo.ecm.platform.picture.api.ImagingConvertConstants;
032import org.nuxeo.ecm.platform.picture.api.ImagingService;
033import org.nuxeo.runtime.api.Framework;
034
035/**
036 * @author <a href="mailto:ldoguin@nuxeo.com">Laurent Doguint</a>
037 */
038public class RotationPictureConverter implements Converter {
039
040    @Override
041    public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException {
042        ImagingService service = Framework.getService(ImagingService.class);
043        List<Blob> results = new ArrayList<Blob>();
044        List<Blob> sources = blobHolder.getBlobs();
045        int angle = (Integer) parameters.get(ImagingConvertConstants.OPTION_ROTATE_ANGLE);
046        for (Blob source : sources) {
047            if (source != null) {
048                Blob result = service.rotate(source, angle);
049                if (result != null) {
050                    results.add(result);
051                }
052            }
053        }
054        return new SimpleCachableBlobHolder(results);
055    }
056
057    @Override
058    public void init(ConverterDescriptor descriptor) {
059    }
060
061}