/**
* Copyright (C) 2010-2014 Morgner UG (haftungsbeschränkt)
*
* This file is part of Structr <http://structr.org>.
*
* Structr is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Structr is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Structr. If not, see <http://www.gnu.org/licenses/>.
*/
package org.structr.web.converter;
import net.sf.jmimemagic.Magic;
import net.sf.jmimemagic.MagicMatch;
import org.apache.commons.lang3.StringUtils;
import org.structr.web.common.ImageHelper;
import org.structr.common.KeyAndClass;
import org.structr.common.SecurityContext;
import org.structr.core.GraphObject;
import org.structr.core.converter.PropertyConverter;
import org.structr.web.entity.Image;
//~--- JDK imports ------------------------------------------------------------
import java.util.logging.Level;
import java.util.logging.Logger;
//~--- classes ----------------------------------------------------------------
/**
* Converts image data into an image node.
*
* If a {@link KeyAndClass} object is given, the image will be created with
* the corresponding type and with setProperty to the given property key.
*
* If no {@link KeyAndClass} object is given, the image data will be set on
* the image node itself.
*
* @author Axel Morgner
*/
public class ImageConverter extends PropertyConverter {
private static final Logger logger = Logger.getLogger(ImageConverter.class.getName());
private KeyAndClass<Image> keyAndClass = null;
public ImageConverter(SecurityContext securityContext, GraphObject entity, KeyAndClass<Image> kc) {
super(securityContext, entity);
this.keyAndClass = kc;
}
//~--- methods --------------------------------------------------------
@Override
public Object convert(final Object source) {
if (source == null) {
return false;
}
try {
Image img = null;
try {
if (source instanceof byte[]) {
byte[] data = (byte[]) source;
MagicMatch match = Magic.getMagicMatch(data);
String mimeType = match.getMimeType();
if (keyAndClass != null) {
img = (Image) ImageHelper.createFile(securityContext, data, mimeType, keyAndClass.getCls());
} else {
ImageHelper.setImageData((Image) currentObject, data, mimeType);
}
} else if (source instanceof String) {
String sourceString = (String) source;
if (StringUtils.isNotBlank(sourceString)) {
if (keyAndClass != null) {
// UUID?
if (sourceString.length() == 32) {
img = (Image) ImageHelper.transformFile(securityContext, sourceString, keyAndClass != null ? keyAndClass.getCls() : null);
}
if (img == null) {
img = (Image) ImageHelper.createFileBase64(securityContext, sourceString, keyAndClass != null ? keyAndClass.getCls() : null);
}
} else {
ImageHelper.decodeAndSetFileData((Image) currentObject, sourceString);
}
}
}
} catch (Throwable t) {
logger.log(Level.WARNING, "Cannot create image node from given data", t);
}
if (img != null) {
// manual indexing of UUID needed here to avoid a 404 in the following setProperty call
img.updateInIndex();
currentObject.setProperty(keyAndClass.getPropertyKey(), img);
}
} catch (Throwable t) {
logger.log(Level.WARNING, "Cannot create image node from given data", t);
}
return null;
}
@Override
public Object revert(Object source) {
if (currentObject instanceof Image) {
return ImageHelper.getBase64String((Image) currentObject);
} else {
return source;
}
}
}