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148 changes: 148 additions & 0 deletions
148
library/src/main/java/org/mustangproject/ZUGFeRD/ValidationLogVisualizer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| package org.mustangproject.ZUGFeRD; | ||
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| import org.apache.fop.apps.*; | ||
| import org.apache.fop.apps.io.ResourceResolverFactory; | ||
| import org.apache.fop.configuration.Configuration; | ||
| import org.apache.fop.configuration.ConfigurationException; | ||
| import org.apache.fop.configuration.DefaultConfigurationBuilder; | ||
| import org.apache.xmlgraphics.util.MimeConstants; | ||
| import org.mustangproject.ClasspathResolverURIAdapter; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
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| import javax.xml.transform.*; | ||
| import javax.xml.transform.sax.SAXResult; | ||
| import javax.xml.transform.stream.StreamResult; | ||
| import javax.xml.transform.stream.StreamSource; | ||
| import java.io.*; | ||
| import java.nio.charset.StandardCharsets; | ||
|
|
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| public class ValidationLogVisualizer { | ||
| public enum Language { | ||
| EN, | ||
| FR, | ||
| DE | ||
| } | ||
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| static final ClassLoader CLASS_LOADER = ValidationLogVisualizer.class.getClassLoader(); | ||
| private static final String RESOURCE_PATH = ""; | ||
| private static final Logger LOGGER = LoggerFactory.getLogger(ValidationLogVisualizer.class); | ||
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| private TransformerFactory mFactory = null; | ||
| private Templates mXsltPDFTemplate = null; | ||
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| public ValidationLogVisualizer() { | ||
| mFactory = new net.sf.saxon.TransformerFactoryImpl(); | ||
| // fact = TransformerFactory.newInstance(); | ||
| mFactory.setURIResolver(new ValidationLogVisualizer.ClasspathResourceURIResolver()); | ||
| } | ||
|
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| protected void applyXSLTToPDF(final String xmlContent, final OutputStream PDFOutstream) | ||
| throws TransformerException { | ||
| Transformer transformer = mXsltPDFTemplate.newTransformer(); | ||
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| transformer.transform(new StreamSource(new StringReader(xmlContent)), new StreamResult(PDFOutstream)); | ||
| } | ||
|
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| protected String toFOP(final String xmlContent) | ||
| throws TransformerException { | ||
|
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| try { | ||
| if (mXsltPDFTemplate == null) { | ||
| mXsltPDFTemplate = mFactory.newTemplates( | ||
| new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/result-pdf.xsl"))); | ||
| } | ||
| } catch (TransformerConfigurationException ex) { | ||
| LOGGER.error("Failed to init XSLT templates", ex); | ||
| } | ||
|
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| ByteArrayOutputStream baos = new ByteArrayOutputStream(); | ||
|
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| try { | ||
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| applyXSLTToPDF(xmlContent, baos); | ||
|
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| } catch (Exception e1) { | ||
| LOGGER.error("Failed to create PDF", e1); | ||
| } | ||
|
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| return baos.toString(StandardCharsets.UTF_8); | ||
| } | ||
|
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| public void toPDF(String xmlLogfileContent, String pdfFilename) { | ||
|
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| // the writing part | ||
|
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| String result = null; | ||
|
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| /* remove file endings so that tests can also pass after checking | ||
| out from git with arbitrary options (which may include CSRF changes) | ||
| */ | ||
| try { | ||
| result = this.toFOP(xmlLogfileContent); | ||
| } catch ( TransformerException e) { | ||
| LOGGER.error("Failed to apply FOP", e); | ||
| } | ||
| DefaultConfigurationBuilder cfgBuilder = new DefaultConfigurationBuilder(); | ||
|
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| Configuration cfg = null; | ||
| try { | ||
| cfg = cfgBuilder.build(CLASS_LOADER.getResourceAsStream("fop-config.xconf")); | ||
| } catch (ConfigurationException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
|
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| FopFactoryBuilder builder = new FopFactoryBuilder(new File(".").toURI(), new ClasspathResolverURIAdapter()).setConfiguration(cfg); | ||
| // Step 1: Construct a FopFactory by specifying a reference to the configuration file | ||
| // (reuse if you plan to render multiple documents!) | ||
|
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| FopFactory fopFactory = builder.build(); | ||
|
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| fopFactory.getFontManager().setResourceResolver( | ||
| ResourceResolverFactory.createInternalResourceResolver( | ||
| new File(".").toURI(), | ||
| new ClasspathResolverURIAdapter())); | ||
|
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| FOUserAgent userAgent = fopFactory.newFOUserAgent(); | ||
|
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| userAgent.getRendererOptions().put("pdf-a-mode", "PDF/A-3b"); | ||
|
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| // Step 2: Set up output stream. | ||
| // Note: Using BufferedOutputStream for performance reasons (helpful with FileOutputStreams). | ||
|
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| try (OutputStream out = new BufferedOutputStream(new FileOutputStream(pdfFilename))) { | ||
|
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| // Step 3: Construct fop with desired output format | ||
| Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, userAgent, out); | ||
|
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| // Step 4: Setup JAXP using identity transformer | ||
| TransformerFactory factory = TransformerFactory.newInstance(); | ||
| Transformer transformer = factory.newTransformer(); // identity transformer | ||
|
|
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| // Step 5: Setup input and output for XSLT transformation | ||
| // Setup input stream | ||
| Source src = new StreamSource(new ByteArrayInputStream(result.getBytes(StandardCharsets.UTF_8))); | ||
|
|
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| // Resulting SAX events (the generated FO) must be piped through to FOP | ||
| Result res = new SAXResult(fop.getDefaultHandler()); | ||
|
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| // Step 6: Start XSLT transformation and FOP processing | ||
| transformer.transform(src, res); | ||
|
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| } catch (FOPException | IOException | TransformerException e) { | ||
| LOGGER.error("Failed to create PDF", e); | ||
| } | ||
| } | ||
|
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| private static class ClasspathResourceURIResolver implements URIResolver { | ||
| ClasspathResourceURIResolver() { | ||
| // Do nothing, just prevents synthetic access warning. | ||
| } | ||
|
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| @Override | ||
| public Source resolve(String href, String base) throws TransformerException { | ||
| return new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/" + href)); | ||
| } | ||
| } | ||
| } |
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