org.verapdf.gf.model.impl.cos.GFCosNull Maven / Gradle / Ivy
/**
* This file is part of veraPDF Validation, a module of the veraPDF project.
* Copyright (c) 2015, veraPDF Consortium
* All rights reserved.
*
* veraPDF Validation is free software: you can redistribute it and/or modify
* it under the terms of either:
*
* The GNU General public license GPLv3+.
* You should have received a copy of the GNU General Public License
* along with veraPDF Validation as the LICENSE.GPL file in the root of the source
* tree. If not, see http://www.gnu.org/licenses/ or
* https://www.gnu.org/licenses/gpl-3.0.en.html.
*
* The Mozilla Public License MPLv2+.
* You should have received a copy of the Mozilla Public License along with
* veraPDF Validation as the LICENSE.MPL file in the root of the source tree.
* If a copy of the MPL was not distributed with this file, you can obtain one at
* http://mozilla.org/MPL/2.0/.
*/
package org.verapdf.gf.model.impl.cos;
import org.verapdf.cos.COSNull;
import org.verapdf.model.coslayer.CosNull;
/**
* @author Timur Kamalov
*/
public class GFCosNull extends GFCosObject implements CosNull {
/** Type name for GFCosNull */
public static final String COS_NULL_TYPE = "CosNull";
/**
* PDF null object
*/
private static CosNull NULL;
private GFCosNull(COSNull nil) {
super(nil, COS_NULL_TYPE);
}
/**
* Method to get instance of PBCosNull object
* @return PBCosNull object
*/
public static CosNull getInstance() {
return NULL == null ? NULL = new GFCosNull(COSNull.NULL) : NULL;
}
}