Burmese language support

PDFGeneratorImpl.java

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+package io.mosip.print.service.impl;
+
+import com.itextpdf.html2pdf.ConverterProperties;
+import com.itextpdf.html2pdf.HtmlConverter;
+import com.itextpdf.html2pdf.css.media.MediaDeviceDescription;
+import com.itextpdf.html2pdf.css.media.MediaType;
+import com.itextpdf.html2pdf.css.util.CssUtils;
+import com.itextpdf.html2pdf.resolver.font.DefaultFontProvider;
+import com.itextpdf.io.font.FontConstants;
+import com.itextpdf.io.font.FontProgram;
+import com.itextpdf.io.font.FontProgramFactory;
+import com.itextpdf.io.image.ImageDataFactory;
+import com.itextpdf.kernel.geom.PageSize;
+import com.itextpdf.kernel.pdf.PdfDocument;
+import com.itextpdf.kernel.pdf.PdfWriter;
+import com.itextpdf.layout.Document;
+import com.itextpdf.layout.element.Image;
+import com.itextpdf.text.DocumentException;
+import com.itextpdf.text.Rectangle;
+import com.itextpdf.text.pdf.PdfCopy;
+import com.itextpdf.text.pdf.PdfReader;
+import com.itextpdf.text.pdf.PdfSignatureAppearance;
+import com.itextpdf.text.pdf.PdfStamper;
+import com.itextpdf.text.pdf.security.*;
+import com.itextpdf.text.pdf.security.MakeSignature.CryptoStandard;
+import io.mosip.print.constant.PDFGeneratorExceptionCodeConstant;
+import io.mosip.print.exception.PDFGeneratorException;
+import io.mosip.print.logger.PrintLogger;
+import io.mosip.print.model.CertificateEntry;
+import io.mosip.print.spi.PDFGenerator;
+import io.mosip.print.util.EmptyCheckUtils;
+import org.slf4j.Logger;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.*;
+import java.net.URL;
+import java.security.GeneralSecurityException;
+import java.security.PrivateKey;
+import java.security.Provider;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The PdfGeneratorImpl is the class you will use most when converting processed
+ * Template to PDF. It contains a series of methods that accept processed
+ * Template as a {@link String}, {@link File}, or {@link InputStream}, and
+ * convert it to PDF in the form of an {@link OutputStream}, {@link File}
+ * 
+ * Burmese font support added for proper text rendering.
+ * 
+ * @author Urvil Joshi
+ * @since 1.0.0
+ *
+ */
+@Component
+public class PDFGeneratorImpl implements PDFGenerator {
+	private static final Logger LOGGER = PrintLogger.getLogger(PDFGeneratorImpl.class);
+
+	private static final String SHA256 = "SHA256";
+
+	private static final String OUTPUT_FILE_EXTENSION = ".pdf";
+
+	@Value("${mosip.kernel.pdf_owner_password}")
+	private String pdfOwnerPassword;
+
+	// Path to Burmese Noto Sans Font
+	private static final String BURMESE_FONT_PATH = "NotoSansMyanmar-Regular.ttf";
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see io.mosip.kernel.core.pdfgenerator.spi.PDFGenerator#generate(java.io.
+	 * InputStream)
+	 */
+	@Override
+	public OutputStream generate(InputStream is) throws IOException {
+		isValidInputStream(is);
+		OutputStream os = new ByteArrayOutputStream();
+		try {
+			HtmlConverter.convertToPdf(is, os, getConverterProperties());
+		} catch (Exception e) {
+			throw new PDFGeneratorException(PDFGeneratorExceptionCodeConstant.PDF_EXCEPTION.getErrorCode(),
+				e.getMessage());
+		}
+		return os;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * io.mosip.kernel.core.pdfgenerator.spi.PDFGenerator#generate(java.lang.String)
+	 */
+	@Override
+	public OutputStream generate(String template) throws IOException {
+		OutputStream os = new ByteArrayOutputStream();
+		try {
+			HtmlConverter.convertToPdf(template, os, getConverterProperties());
+		} catch (Exception e) {
+			throw new PDFGeneratorException(PDFGeneratorExceptionCodeConstant.PDF_EXCEPTION.getErrorCode(),
+				PDFGeneratorExceptionCodeConstant.PDF_EXCEPTION.getErrorMessage(), e);
+		}
+		return os;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * io.mosip.kernel.core.pdfgenerator.spi.PDFGenerator#generate(java.lang.String,
+	 * java.lang.String, java.lang.String)
+	 */
+	@Override
+	public void generate(String templatePath, String outpuFilePath, String outputFileName) throws IOException {
+		File outputFile = new File(outpuFilePath + outputFileName + OUTPUT_FILE_EXTENSION);
+		try {
+			HtmlConverter.convertToPdf(new File(templatePath), outputFile, getConverterProperties());
+		} catch (Exception e) {
+			throw new PDFGeneratorException(PDFGeneratorExceptionCodeConstant.PDF_EXCEPTION.getErrorCode(),
+				PDFGeneratorExceptionCodeConstant.PDF_EXCEPTION.getErrorMessage(), e);
+		}
+
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see io.mosip.kernel.core.pdfgenerator.spi.PDFGenerator#generate(java.io.
+	 * InputStream, java.lang.String)
+	 */
+	@Override
+	public OutputStream generate(InputStream is, String resourceLoc) throws IOException {
+		isValidInputStream(is);
+		OutputStream os = new ByteArrayOutputStream();
+		PdfWriter pdfWriter = new PdfWriter(os);
+		PdfDocument pdfDoc = new PdfDocument(pdfWriter);
+		ConverterProperties converterProperties = getConverterProperties();
+		pdfDoc.setTagged();
+		PageSize pageSize = PageSize.A4.rotate();
+		pdfDoc.setDefaultPageSize(pageSize);
+		float screenWidth = CssUtils.parseAbsoluteLength("") + pageSize.getWidth();
+		MediaDeviceDescription mediaDescription = new MediaDeviceDescription(MediaType.SCREEN);
+		mediaDescription.setWidth(screenWidth);
+		converterProperties.setMediaDeviceDescription(mediaDescription);
+		try {
+			HtmlConverter.convertToPdf(is, pdfDoc, converterProperties);
+		} catch (Exception e) {
+			throw new PDFGeneratorException(PDFGeneratorExceptionCodeConstant.PDF_EXCEPTION.getErrorCode(),
+				e.getMessage());
+		}
+		return os;
+	}
+
+	// Initializes ConverterProperties with Burmese font.
+	private ConverterProperties getConverterProperties() throws IOException {
+		ConverterProperties converterProperties = new ConverterProperties();
+		DefaultFontProvider fontProvider = new DefaultFontProvider();
+		FontProgram burmeseFont = FontProgramFactory.createFont(BURMESE_FONT_PATH);
+		fontProvider.addFont(burmeseFont);
+		converterProperties.setFontProvider(fontProvider);
+		return converterProperties;
+	}
+
+	private void isValidInputStream(InputStream dataInputStream) {
+		if (EmptyCheckUtils.isNullEmpty(dataInputStream)) {
+			throw new PDFGeneratorException(
+				PDFGeneratorExceptionCodeConstant.INPUTSTREAM_NULL_EMPTY_EXCEPTION.getErrorCode(),
+				PDFGeneratorExceptionCodeConstant.INPUTSTREAM_NULL_EMPTY_EXCEPTION.getErrorMessage());
+		}
+	}
+}