001/*
002 * (C) Copyright 2016 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 *     Thomas Roger
018 *
019 */
020
021package org.nuxeo.ecm.restapi.server.jaxrs.rendition;
022
023import static org.nuxeo.ecm.core.io.download.DownloadService.REQUEST_ATTR_DOWNLOAD_REASON;
024import static org.nuxeo.ecm.core.io.download.DownloadService.REQUEST_ATTR_DOWNLOAD_RENDITION;
025
026import javax.servlet.http.HttpServletRequest;
027import javax.ws.rs.GET;
028import javax.ws.rs.core.Context;
029import javax.ws.rs.core.Request;
030
031import org.nuxeo.ecm.core.api.Blob;
032import org.nuxeo.ecm.core.api.DocumentModel;
033import org.nuxeo.ecm.platform.rendition.Rendition;
034import org.nuxeo.ecm.platform.rendition.service.RenditionService;
035import org.nuxeo.ecm.webengine.model.WebObject;
036import org.nuxeo.ecm.webengine.model.exceptions.WebResourceNotFoundException;
037import org.nuxeo.ecm.webengine.model.impl.DefaultObject;
038import org.nuxeo.runtime.api.Framework;
039
040/**
041 * @since 8.2
042 */
043@WebObject(type = "rendition")
044public class RenditionObject extends DefaultObject {
045
046    @Context
047    protected HttpServletRequest servletRequest;
048
049    protected String renditionName;
050
051    protected DocumentModel doc;
052
053    @Override
054    protected void initialize(Object... args) {
055        assert args != null && args.length == 2;
056        doc = (DocumentModel) args[0];
057        renditionName = (String) args[1];
058    }
059
060    @Override
061    public <A> A getAdapter(Class<A> adapter) {
062        if (adapter.isAssignableFrom(Blob.class)) {
063            return adapter.cast(getRenditionBlob());
064        }
065        return super.getAdapter(adapter);
066    }
067
068    protected Blob getRenditionBlob() {
069        RenditionService renditionService = Framework.getService(RenditionService.class);
070        Rendition rendition = renditionService.getRendition(doc, renditionName);
071        if (rendition == null) {
072            throw new WebResourceNotFoundException(String.format("No rendition '%s' was found", renditionName));
073        }
074        return rendition.getBlob();
075    }
076
077    @GET
078    public Object doGet(@Context Request request) {
079        Blob blob = getRenditionBlob();
080        if (blob == null) {
081            throw new WebResourceNotFoundException(
082                    String.format("No Blob was found for rendition '%s'", renditionName));
083        }
084        servletRequest.setAttribute(REQUEST_ATTR_DOWNLOAD_REASON, "rendition");
085        servletRequest.setAttribute(REQUEST_ATTR_DOWNLOAD_RENDITION, renditionName);
086        return blob;
087    }
088}