001    /*
002     * Databinder: a simple bridge from Wicket to Hibernate
003     * Copyright (C) 2006  Nathan Hamblen nathan@technically.us
004    
005     * This library is free software; you can redistribute it and/or
006     * modify it under the terms of the GNU Lesser General Public
007     * License as published by the Free Software Foundation; either
008     * version 2.1 of the License, or (at your option) any later version.
009     * 
010     * This library is distributed in the hope that it will be useful,
011     * but WITHOUT ANY WARRANTY; without even the implied warranty of
012     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013     * Lesser General Public License for more details.
014     * 
015     * You should have received a copy of the GNU Lesser General Public
016     * License along with this library; if not, write to the Free Software
017     * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
018     */
019    package net.databinder.components.hib;
020    
021    import java.io.IOException;
022    
023    import org.hibernate.Hibernate;
024    
025    import org.apache.wicket.markup.html.form.upload.FileUploadField;
026    import org.apache.wicket.model.IModel;
027    
028    /**
029     * Extension of FileUploadField optimized for blob resources. This upload field can be 
030     * bound to an object with a compound property model where the property corresponds
031     * to the destination blob setter. This allows for file uploads with no specific code for each 
032     * upload component.
033     * @author Nathan Hamblen
034     */
035    public class BlobUploadField extends FileUploadField {
036            /**
037             * Costructor to be used with compound property model.
038             * @param id component id, should resolve to a stream property
039             */
040            public BlobUploadField(String id) {
041                    super(id);
042            }
043    
044            /**
045             * Constructor to be used with PropertyModel or other model.
046             * @param id component id
047             * @param model should resolve to a stream setter
048             */
049            public BlobUploadField(String id, IModel model) {
050                    super(id, model);
051            }
052    
053            /**
054             * Converts the upload's inputstream to the resolved blob setter.
055             */
056            @Override
057            public void updateModel() {
058                    try {
059                            if (getFileUpload() != null) {
060                                    setModelObject(Hibernate.createBlob(getFileUpload().getInputStream()));
061                                    onUpdated();
062                            }
063                    } catch (IOException e) {
064                            throw new RuntimeException(e);
065                    }
066            }
067            protected void onUpdated() { }
068    }