new dir layout
This commit is contained in:
Jochen Stärk
@@ -0,0 +1,276 @@
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package org.mustangproject.ZUGFeRD;
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import org.apache.pdfbox.io.IOUtils;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
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import org.apache.pdfbox.pdmodel.PDDocumentInformation;
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import org.apache.pdfbox.pdmodel.common.PDMetadata;
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import org.apache.pdfbox.preflight.PreflightDocument;
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import org.apache.pdfbox.preflight.exception.ValidationException;
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import org.apache.pdfbox.preflight.parser.PreflightParser;
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import org.apache.pdfbox.preflight.utils.ByteArrayDataSource;
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import org.apache.xmpbox.XMPMetadata;
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import org.apache.xmpbox.schema.AdobePDFSchema;
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import org.apache.xmpbox.schema.DublinCoreSchema;
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import org.apache.xmpbox.schema.PDFAIdentificationSchema;
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import org.apache.xmpbox.schema.XMPBasicSchema;
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import org.apache.xmpbox.type.BadFieldValueException;
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import org.apache.xmpbox.xml.XmpSerializer;
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import org.mustangproject.ZUGFeRD.model.PDFAConformanceLevel;
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import javax.activation.DataSource;
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import javax.activation.FileDataSource;
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import javax.xml.transform.TransformerException;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.GregorianCalendar;
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public class ZUGFeRDExporterFromA1Factory {
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private static final String VERSION_STR = "1.4.0";
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private boolean ignoreA1Errors = false;
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private ZUGFeRDConformanceLevel zugferdConformanceLevel = ZUGFeRDConformanceLevel.EXTENDED;
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private PDFAConformanceLevel conformanceLevel = PDFAConformanceLevel.U;
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private String producer = "mustangproject";
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private String creator = "mustangproject";
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private boolean attachZugferdHeaders = true;
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/**
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* Makes A PDF/A3a-compliant document from a PDF-A1 compliant document (on
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* the metadata level, this will not e.g. convert graphics to JPG-2000)
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*
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* @param pdfFilename filename of an PDF/A1 compliant document
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*/
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public ZUGFeRDExporter loadFromPDFA1(String pdfFilename) throws IOException {
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ensurePDFIsValidA1(new FileDataSource(pdfFilename));
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PDDocument doc = PDDocument.load(new File(pdfFilename));
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makePDFA3compliant(doc);
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return new ZUGFeRDExporter(doc);
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}
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/**
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* Makes A PDF/A3a-compliant document from a PDF-A1 compliant document (on
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* the metadata level, this will not e.g. convert graphics to JPG-2000)
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*
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* @param pdfBinary binary of a PDF/A1 compliant document
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*/
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public ZUGFeRDExporter loadFromPDFA1(byte[] pdfBinary) throws IOException, TransformerException {
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ensurePDFIsValidA1(new ByteArrayDataSource(new ByteArrayInputStream(pdfBinary)));
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PDDocument doc = PDDocument.load(pdfBinary);
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makePDFA3compliant(doc);
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return new ZUGFeRDExporter(doc);
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}
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/**
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* Makes A PDF/A3a-compliant document from a PDF-A1 compliant document (on
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* the metadata level, this will not e.g. convert graphics to JPG-2000)
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*
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* @param pdfSource source to read a PDF/A1 compliant document from
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*/
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public ZUGFeRDExporter loadFromPDFA1(InputStream pdfSource) throws IOException, TransformerException {
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return loadFromPDFA1(readAllBytes(pdfSource));
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}
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private void ensurePDFIsValidA1(final DataSource dataSource) throws IOException {
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if (!ignoreA1Errors && !isValidA1(dataSource)) {
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throw new IOException("File is not a valid PDF/A-1 input file");
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}
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}
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private static byte[] readAllBytes(InputStream in) throws IOException {
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ByteArrayOutputStream buffer = new ByteArrayOutputStream();
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IOUtils.copy(in, buffer);
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return buffer.toByteArray();
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}
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private void makePDFA3compliant(PDDocument doc) throws IOException {
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String fullProducer = producer + " (via mustangproject.org " + VERSION_STR + ")";
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PDDocumentCatalog cat = doc.getDocumentCatalog();
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PDMetadata metadata = new PDMetadata(doc);
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cat.setMetadata(metadata);
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XMPMetadata xmp = XMPMetadata.createXMPMetadata();
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PDFAIdentificationSchema pdfaid = new PDFAIdentificationSchema(xmp);
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xmp.addSchema(pdfaid);
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DublinCoreSchema dc = xmp.createAndAddDublinCoreSchema();
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dc.addCreator(creator);
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XMPBasicSchema xsb = xmp.createAndAddXMPBasicSchema();
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xsb.setCreatorTool(creator);
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xsb.setCreateDate(GregorianCalendar.getInstance());
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// PDDocumentInformation pdi=doc.getDocumentInformation();
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PDDocumentInformation pdi = new PDDocumentInformation();
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pdi.setProducer(fullProducer);
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pdi.setAuthor(creator);
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doc.setDocumentInformation(pdi);
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AdobePDFSchema pdf = xmp.createAndAddAdobePDFSchema();
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pdf.setProducer(fullProducer);
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/*
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* // Mandatory: PDF/A3-a is tagged PDF which has to be expressed using
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* a // MarkInfo dictionary (PDF A/3 Standard sec. 6.7.2.2) PDMarkInfo
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* markinfo = new PDMarkInfo(); markinfo.setMarked(true);
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* doc.getDocumentCatalog().setMarkInfo(markinfo);
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*/
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/*
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*
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* To be on the safe side, we use level B without Markinfo because we
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* can not guarantee that the user correctly tagged the templates for
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* the PDF.
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*/
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try {
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pdfaid.setConformance(conformanceLevel.getLetter());//$NON-NLS-1$ //$NON-NLS-1$
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} catch (BadFieldValueException ex) {
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// This should be impossible, because it would occur only if an illegal conformance level is supplied,
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// however the enum enforces that the conformance level is valid.
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throw new Error(ex);
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}
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pdfaid.setPart(3);
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if (attachZugferdHeaders) {
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addZugferdXMP(xmp); /*
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* this is the only line where we do something
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* Zugferd-specific, i.e. add PDF metadata
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* specifically for Zugferd, not generically for
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* a embedded file
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*/
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}
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try {
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metadata.importXMPMetadata(serializeXmpMetadata(xmp));
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} catch (TransformerException e) {
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throw new ZUGFeRDExportException("Could not export XmpMetadata", e);
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}
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}
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private static byte[] serializeXmpMetadata(XMPMetadata xmpMetadata) throws TransformerException {
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XmpSerializer serializer = new XmpSerializer();
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ByteArrayOutputStream buffer = new ByteArrayOutputStream();
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serializer.serialize(xmpMetadata, buffer, false);
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return buffer.toByteArray();
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}
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private static boolean isValidA1(DataSource dataSource) throws IOException {
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return getA1ParserValidationResult(new PreflightParser(dataSource));
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}
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/**
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* This will add both the RDF-indication which embedded file is Zugferd
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* and the neccessary PDF/A schema extension description to be able to add
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* this information to RDF
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*
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* @param metadata
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*/
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private void addZugferdXMP(XMPMetadata metadata) {
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XMPSchemaZugferd zf = new XMPSchemaZugferd(metadata, zugferdConformanceLevel.name());
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metadata.addSchema(zf);
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XMPSchemaPDFAExtensions pdfaex = new XMPSchemaPDFAExtensions(metadata);
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metadata.addSchema(pdfaex);
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}
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/**
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* Sets the ZUGFeRD conformance level (override).
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*
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* @param zugferdConformanceLevel
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* the new conformance level
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*/
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public ZUGFeRDExporterFromA1Factory setZugferdConformanceLevel(ZUGFeRDConformanceLevel zugferdConformanceLevel) {
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this.zugferdConformanceLevel = zugferdConformanceLevel;
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return this;
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}
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private static boolean getA1ParserValidationResult(PreflightParser parser) throws IOException {
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PreflightDocument document = null;
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try {
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/*
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* Parse the PDF file with PreflightParser that inherits from the
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* NonSequentialParser. Some additional controls are present to
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* check a set of PDF/A requirements. (Stream length consistency,
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* EOL after some Keyword...)
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*/
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parser.parse();
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/*
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* Once the syntax validation is done, the parser can provide a
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* PreflightDocument (that inherits from PDDocument) This document
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* process the end of PDF/A validation.
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*/
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document = parser.getPreflightDocument();
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document.validate();
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// Get validation result
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return document.getResult().isValid();
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} catch (ValidationException e) {
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/*
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* the parse method can throw a SyntaxValidationException if the PDF
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* file can't be parsed. In this case, the exception contains an
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* instance of ValidationResult
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*/
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return false;
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} finally {
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if (document != null) {
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document.close();
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}
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}
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}
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/**
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* All files are PDF/A-3, setConformance refers to the level conformance.
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*
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* PDF/A-3 has three coformance levels, called "A", "U" and "B".
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*
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* PDF/A-3-B where B means only visually preservable, U -standard for
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* Mustang- means visually and unicode preservable and A means full
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* compliance, i.e. visually, unicode and structurally preservable and
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* tagged PDF, i.e. useful metainformation for blind people.
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*
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* Feel free to pass "A" as new level if you know what you are doing :-)
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*
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*
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*/
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public ZUGFeRDExporterFromA1Factory setConformanceLevel(PDFAConformanceLevel newLevel) {
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conformanceLevel = newLevel;
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return this;
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}
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public ZUGFeRDExporterFromA1Factory ignoreA1Errors() {
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this.ignoreA1Errors = true;
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return this;
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}
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public ZUGFeRDExporterFromA1Factory setAttachZugferdHeaders(final boolean attachZugferdHeaders) {
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this.attachZugferdHeaders = attachZugferdHeaders;
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return this;
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}
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public ZUGFeRDExporterFromA1Factory setCreator(String creator) {
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this.creator = creator;
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return this;
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}
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public ZUGFeRDExporterFromA1Factory setProducer(String producer) {
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this.producer = producer;
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return this;
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}
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}
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@@ -0,0 +1,15 @@
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package org.mustangproject.ZUGFeRD.model;
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public enum PDFAConformanceLevel {
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ACCESSIBLE("A"), BASIC("B"), U("U");
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private final String letter;
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PDFAConformanceLevel(final String letter) {
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this.letter = letter;
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}
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public String getLetter() {
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return letter;
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}
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}
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