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 *     bstefanescu
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.platform.rendering.fm.adapters;
023
024import java.io.IOException;
025import java.util.ArrayList;
026import java.util.List;
027
028import org.nuxeo.ecm.core.api.Blob;
029
030import freemarker.template.AdapterTemplateModel;
031import freemarker.template.SimpleNumber;
032import freemarker.template.SimpleScalar;
033import freemarker.template.TemplateCollectionModel;
034import freemarker.template.TemplateHashModelEx;
035import freemarker.template.TemplateModel;
036import freemarker.template.TemplateModelException;
037
038/**
039 * @author <a href="mailto:[email protected]">Bogdan Stefanescu</a>
040 */
041public class BlobTemplate extends PropertyWrapper implements TemplateHashModelEx, AdapterTemplateModel {
042
043    protected static final String[] keys = { "filename", "data", "length", "mimeType", "encoding", "digest" };
044
045    protected final Blob blob;
046
047    public BlobTemplate(DocumentObjectWrapper wrapper, Blob blob) {
048        super(wrapper);
049        this.blob = blob;
050    }
051
052    @SuppressWarnings("rawtypes")
053    @Override
054    public Object getAdaptedObject(Class hint) {
055        return blob;
056    }
057
058    @Override
059    public TemplateCollectionModel keys() throws TemplateModelException {
060        return (TemplateCollectionModel) wrapper.wrap(keys);
061    }
062
063    @Override
064    public int size() throws TemplateModelException {
065        return keys.length;
066    }
067
068    @Override
069    public TemplateCollectionModel values() throws TemplateModelException {
070        try {
071            List<Object> list = new ArrayList<Object>(keys.length);
072            if (blob != null) {
073                list.add(blob.getFilename());
074                list.add(blob.getString());
075                list.add(blob.getLength());
076                list.add(blob.getMimeType());
077                list.add(blob.getEncoding());
078                list.add(blob.getDigest());
079            } else {
080                list.add("");
081                list.add("");
082                list.add("");
083                list.add("");
084                list.add("");
085                list.add("");
086            }
087            return (TemplateCollectionModel) wrapper.wrap(list);
088        } catch (IOException e) {
089            throw new TemplateModelException("Failed to adapt complex property values", e);
090        }
091    }
092
093    @Override
094    public TemplateModel get(String name) throws TemplateModelException {
095        try {
096            if (blob != null) {
097                if (keys[0].equals(name)) {
098                    return new SimpleScalar(blob.getFilename());
099                } else if (keys[1].equals(name)) {
100                    return new SimpleScalar(blob.getString());
101                } else if (keys[2].equals(name)) {
102                    return new SimpleNumber(blob.getLength());
103                } else if (keys[3].equals(name)) {
104                    return new SimpleScalar(blob.getMimeType());
105                } else if (keys[4].equals(name)) {
106                    return new SimpleScalar(blob.getEncoding());
107                } else if (keys[5].equals(name)) {
108                    return new SimpleScalar(blob.getDigest());
109                }
110            }
111            return NOTHING;
112        } catch (IOException e) {
113            throw new TemplateModelException(e);
114        }
115    }
116
117    @Override
118    public boolean isEmpty() throws TemplateModelException {
119        return false;
120    }
121
122}