001/*
002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and others.
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 *     Thomas Roger
016 */
017
018package org.nuxeo.ecm.core.convert.service;
019
020import java.io.IOException;
021import java.io.Serializable;
022import java.util.HashMap;
023import java.util.Map;
024
025import org.nuxeo.ecm.core.api.NuxeoException;
026import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
027import org.nuxeo.ecm.core.api.blobholder.SimpleBlobHolderWithProperties;
028import org.nuxeo.ecm.core.convert.api.ConversionService;
029import org.nuxeo.ecm.core.transientstore.StorageEntryImpl;
030import org.nuxeo.ecm.core.transientstore.api.StorageEntry;
031import org.nuxeo.ecm.core.transientstore.work.TransientStoreWork;
032import org.nuxeo.runtime.api.Framework;
033
034/**
035 * Work executing a given conversion.
036 *
037 * @since 7.4
038 */
039public class ConversionWork extends TransientStoreWork {
040
041    protected String converterName;
042
043    protected Map<String, Serializable> parameters;
044
045    protected String inputEntryKey;
046
047    public ConversionWork(String converterName, BlobHolder blobHolder, Map<String, Serializable> parameters) {
048        super();
049        this.converterName = converterName;
050        this.parameters = parameters;
051        if (this.parameters == null) {
052            this.parameters = new HashMap<>();
053        }
054
055        storeInputBlobHolder(blobHolder);
056    }
057
058    protected void storeInputBlobHolder(BlobHolder blobHolder) {
059        inputEntryKey = entryKey + "_input";
060        StorageEntry entry = new StorageEntryImpl(inputEntryKey);
061        entry.setBlobs(blobHolder.getBlobs());
062        Map<String, Serializable> properties = blobHolder.getProperties();
063        if (properties != null) {
064            entry.putAll(properties);
065        }
066        saveStorageEntry(entry);
067    }
068
069    @Override
070    public void work() {
071        setStatus("Converting");
072
073        BlobHolder inputBlobHolder = retrieveInputBlobHolder();
074        if (inputBlobHolder == null) {
075            return;
076        }
077
078        ConversionService conversionService = Framework.getService(ConversionService.class);
079        BlobHolder result = conversionService.convert(converterName, inputBlobHolder, parameters);
080        if (result == null) {
081            return;
082        }
083
084        StorageEntry entry = getStorageEntry();
085        entry.setBlobs(result.getBlobs());
086        Map<String, Serializable> properties = result.getProperties();
087        if (properties != null) {
088            entry.putAll(properties);
089        }
090        saveStorageEntry();
091
092        setStatus(null);
093    }
094
095    protected BlobHolder retrieveInputBlobHolder() {
096        StorageEntry inputEntry = getStorageEntry(inputEntryKey);
097        if (inputEntry == null) {
098            return null;
099        }
100        return new SimpleBlobHolderWithProperties(inputEntry.getBlobs(), inputEntry.getParameters());
101    }
102
103    @Override
104    public void cleanUp(boolean ok, Exception e) {
105        super.cleanUp(ok, e);
106        getStore().remove(inputEntryKey);
107    }
108
109    @Override
110    public String getTitle() {
111        return String.format("Conversion using '%s' converter", converterName);
112    }
113}