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 *     Nuxeo
018 */
019package org.nuxeo.ecm.platform.picture.operation;
020
021import java.io.Serializable;
022import java.util.HashMap;
023import java.util.Map;
024
025import org.nuxeo.ecm.automation.core.Constants;
026import org.nuxeo.ecm.automation.core.annotations.Context;
027import org.nuxeo.ecm.automation.core.annotations.Operation;
028import org.nuxeo.ecm.automation.core.annotations.OperationMethod;
029import org.nuxeo.ecm.automation.core.annotations.Param;
030import org.nuxeo.ecm.core.api.Blob;
031import org.nuxeo.ecm.core.api.Blobs;
032import org.nuxeo.ecm.core.api.DocumentModel;
033import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
034import org.nuxeo.ecm.core.api.blobholder.SimpleBlobHolder;
035import org.nuxeo.ecm.core.convert.api.ConversionService;
036import org.nuxeo.ecm.platform.picture.api.adapters.MultiviewPicture;
037
038/**
039 * Simple Operation to convert the size of a picture blob
040 *
041 * @author Tiry (tdelprat@nuxeo.com)
042 */
043@Operation(id = PictureResize.ID, category = Constants.CAT_CONVERSION, label = "Resize a picture", description = "Use conversion service to resize a picture contained in a Document or a Blob", aliases = { "Picture.resize" })
044public class PictureResize {
045
046    private static final String HEIGHT = "height";
047
048    private static final String WIDTH = "width";
049
050    private static final String PICTURE_RESIZE_CONVERTER = "pictureResize";
051
052    public static final String ID = "Picture.Resize";
053
054    @Param(name = "maxWidth", required = true)
055    protected int maxWidth = 0;
056
057    @Param(name = "maxHeight", required = true)
058    protected int maxHeigh = 0;
059
060    @Context
061    protected ConversionService service;
062
063    @OperationMethod
064    public Blob run(DocumentModel doc) {
065
066        Blob pictureBlob = null;
067        MultiviewPicture mvp = doc.getAdapter(MultiviewPicture.class);
068        if (mvp != null) {
069            pictureBlob = mvp.getView(mvp.getOrigin()).getBlob();
070        } else {
071            BlobHolder bh = doc.getAdapter(BlobHolder.class);
072            if (bh != null) {
073                pictureBlob = bh.getBlob();
074            }
075        }
076
077        if (pictureBlob == null) {
078            Blob blob = Blobs.createBlob("Unable to find a picture in the Document");
079            blob.setFilename(doc.getName() + ".null");
080            return blob;
081        } else {
082            return run(pictureBlob);
083        }
084    }
085
086    @OperationMethod
087    public Blob run(Blob blob) {
088
089        SimpleBlobHolder bh = new SimpleBlobHolder(blob);
090        Map<String, Serializable> parameters = new HashMap<String, Serializable>();
091
092        parameters.put(WIDTH, maxWidth);
093        parameters.put(HEIGHT, maxHeigh);
094
095        if (!service.isConverterAvailable(PICTURE_RESIZE_CONVERTER).isAvailable()) {
096            return blob;
097        }
098
099        BlobHolder result = service.convert(PICTURE_RESIZE_CONVERTER, bh, parameters);
100
101        if (result != null) {
102            return result.getBlob();
103        } else {
104            return Blobs.createBlob("Converter did not return any result");
105        }
106    }
107
108}