com.itextpdf.pdfa.checker.PdfA3Checker Maven / Gradle / Ivy
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Copyright (c) 1998-2021 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
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it under the terms of the GNU Affero General Public License version 3
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or FITNESS FOR A PARTICULAR PURPOSE.
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*/
package com.itextpdf.pdfa.checker;
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfObject;
import com.itextpdf.kernel.pdf.PdfStream;
import com.itextpdf.pdfa.PdfAConformanceException;
import com.itextpdf.kernel.pdf.PdfAConformanceLevel;
import com.itextpdf.pdfa.PdfAConformanceLogMessageConstant;
import java.util.Collections;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* PdfA3Checker defines the requirements of the PDF/A-3 standard and contains a
* number of methods that override the implementations of its superclass
* {@link PdfA2Checker}.
*
* The specification implemented by this class is ISO 19005-3
*/
public class PdfA3Checker extends PdfA2Checker{
protected static final Set allowedAFRelationships = Collections
.unmodifiableSet(new HashSet<>(Arrays.asList(
PdfName.Source,
PdfName.Data,
PdfName.Alternative,
PdfName.Supplement,
PdfName.Unspecified)));
private static final long serialVersionUID = 6280825718658124941L;
/**
* Creates a PdfA3Checker with the required conformance level
*
* @param conformanceLevel the required conformance level, a or
* u or b
*/
public PdfA3Checker(PdfAConformanceLevel conformanceLevel) {
super(conformanceLevel);
}
@Override
protected void checkFileSpec(PdfDictionary fileSpec) {
PdfName relationship = fileSpec.getAsName(PdfName.AFRelationship);
if (relationship == null || !allowedAFRelationships.contains(relationship)) {
throw new PdfAConformanceException(PdfAConformanceException.FILE_SPECIFICATION_DICTIONARY_SHALL_CONTAIN_ONE_OF_THE_PREDEFINED_AFRELATIONSHIP_KEYS);
}
if (fileSpec.containsKey(PdfName.EF)) {
if (!fileSpec.containsKey(PdfName.F) || !fileSpec.containsKey(PdfName.UF) || !fileSpec.containsKey(PdfName.Desc)) {
throw new PdfAConformanceException(PdfAConformanceException.FILE_SPECIFICATION_DICTIONARY_SHALL_CONTAIN_F_KEY_AND_UF_KEY);
}
PdfDictionary ef = fileSpec.getAsDictionary(PdfName.EF);
PdfStream embeddedFile = ef.getAsStream(PdfName.F);
if (embeddedFile == null) {
throw new PdfAConformanceException(PdfAConformanceException.EF_KEY_OF_FILE_SPECIFICATION_DICTIONARY_SHALL_CONTAIN_DICTIONARY_WITH_VALID_F_KEY);
}
if (!embeddedFile.containsKey(PdfName.Subtype)) {
throw new PdfAConformanceException(PdfAConformanceException.MIME_TYPE_SHALL_BE_SPECIFIED_USING_THE_SUBTYPE_KEY_OF_THE_FILE_SPECIFICATION_STREAM_DICTIONARY);
}
if (embeddedFile.containsKey(PdfName.Params)) {
PdfObject params = embeddedFile.get(PdfName.Params);
if (!params.isDictionary()) {
throw new PdfAConformanceException(PdfAConformanceException.EMBEDDED_FILE_SHALL_CONTAIN_PARAMS_KEY_WITH_DICTIONARY_AS_VALUE);
}
if (((PdfDictionary)params).getAsString(PdfName.ModDate) == null) {
throw new PdfAConformanceException(PdfAConformanceException.EMBEDDED_FILE_SHALL_CONTAIN_PARAMS_KEY_WITH_VALID_MODDATE_KEY);
}
} else {
Logger logger = LoggerFactory.getLogger(PdfAChecker.class);
logger.warn(PdfAConformanceLogMessageConstant.EMBEDDED_FILE_SHOULD_CONTAIN_PARAMS_KEY);
}
}
}
}