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veraPDF PDF/A validation model implementation based on PDF parser.
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/**
* 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.as.ASAtom;
import org.verapdf.cos.COSDictionary;
import org.verapdf.cos.COSObjType;
import org.verapdf.cos.COSObject;
import org.verapdf.gf.model.impl.pd.GFPDEncryption;
import org.verapdf.model.baselayer.Object;
import org.verapdf.model.coslayer.CosInfo;
import org.verapdf.model.coslayer.CosTrailer;
import org.verapdf.model.pdlayer.PDEncryption;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Logger;
/**
* @author Timur Kamalov
*/
public class GFCosTrailer extends GFCosDict implements CosTrailer {
private static final Logger LOGGER = Logger.getLogger(GFCosTrailer.class.getCanonicalName());
/** Type name for GFCosTrailer */
public static final String COS_TRAILER_TYPE = "CosTrailer";
public static final String ENCRYPT = "Encrypt";
public static final String INFO = "Info";
private final boolean isEncrypted;
/**
* Default constructor
* @param dictionary greenfield COSDictionary
*/
public GFCosTrailer(COSDictionary dictionary) {
super(dictionary, COS_TRAILER_TYPE);
this.isEncrypted = dictionary.getKey(ASAtom.ENCRYPT).get() != null;
}
/**
* @return true if the current document is encrypted
*/
@Override
public Boolean getisEncrypted() {
return this.isEncrypted;
}
@Override
public List extends Object> getLinkedObjects(String link) {
switch (link) {
case ENCRYPT:
return this.getEncrypt();
case INFO:
return this.getInfo();
default:
return super.getLinkedObjects(link);
}
}
private List getEncrypt() {
COSObject object = this.baseObject.getKey(ASAtom.ENCRYPT);
if (object != null && object.getType() == COSObjType.COS_DICT) {
List list = new ArrayList<>(MAX_NUMBER_OF_ELEMENTS);
list.add(new GFPDEncryption(new org.verapdf.pd.encryption.PDEncryption(object)));
return Collections.unmodifiableList(list);
}
return Collections.emptyList();
}
private List getInfo() {
COSObject object = this.baseObject.getKey(ASAtom.INFO);
if (object != null && object.getType() == COSObjType.COS_DICT) {
List list = new ArrayList<>(MAX_NUMBER_OF_ELEMENTS);
list.add(new GFCosInfo((COSDictionary)object.getDirectBase()));
return Collections.unmodifiableList(list);
}
return Collections.emptyList();
}
}
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