PdfWriter - tylko lista produktów

PC26-RestSerwer/pom.xml

@@ -35,6 +35,7 @@
             <groupId>org.apache.xmlgraphics</groupId>
             <artifactId>fop</artifactId>
             <version>2.11</version>
+            
         </dependency>
     </dependencies>
 

PC26-RestSerwer/src/main/java/sklep/rest/RProductPDF.java

+package sklep.rest;
+
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.PathParam;
+import jakarta.ws.rs.Produces;
+import sklep.db.DBConnection;
+import sklep.db.DBException;
+import sklep.db.ProductDAO;
+import sklep.db.RecordNotFound;
+import sklep.model.Product;
+import sklep.model.ProductList;
+
+@Path("/products.pdf")
+@Produces("application/pdf")
+public class RProductPDF {
+    @GET
+    public ProductList allProducts() throws DBException {
+        try(DBConnection db = DBConnection.open()) {
+            ProductDAO productDAO = db.productDAO();
+            return new ProductList(productDAO.readAll());
+        }
+    }
+
+    @GET
+    @Path("/{id}")
+    // przykładowo /products.pdf/3
+    public Product oneProduct(@PathParam("id") int productId) throws DBException, RecordNotFound {
+        try(DBConnection db = DBConnection.open()) {
+            ProductDAO productDAO = db.productDAO();
+            return productDAO.findById(productId);
+        }
+    }
+}

PC26-RestSerwer/src/main/java/sklep/rest/ext/ObslugaXSL.java

+package sklep.rest.ext;
+
+import java.io.BufferedOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
+
+import jakarta.servlet.ServletContext;
+import jakarta.ws.rs.WebApplicationException;
+import jakarta.xml.bind.JAXBContext;
+import jakarta.xml.bind.util.JAXBSource;
+import javax.xml.transform.Result;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.sax.SAXResult;
+import javax.xml.transform.stream.StreamSource;
+
+import org.apache.fop.apps.Fop;
+import org.apache.fop.apps.FopFactory;
+import org.apache.xmlgraphics.util.MimeConstants;
+
+public class ObslugaXSL {
+    private ServletContext servletContext;
+    
+    public ObslugaXSL(ServletContext servletContext) {
+        this.servletContext = servletContext;
+    }
+
+    // obiekt -(za pomocą JAXB)-> XML -(za pomocą transformera)-> XML(XSL-FO)
+    // --(za pomocą Apache FOP)-> PDF -> output
+    public void wypiszPDF(Object obj, OutputStream output) {
+        try(InputStream configStream = servletContext.getResourceAsStream("WEB-INF/fop-conf.xml")) {
+            JAXBContext ctx = JAXBContext.newInstance(obj.getClass());
+            JAXBSource src = new JAXBSource(ctx, obj);
+
+            FopFactory fopFactory = FopFactory.newInstance(new URI(""), configStream);
+
+            try(BufferedOutputStream pdfOut = new BufferedOutputStream(output)) {
+                Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, pdfOut);
+                TransformerFactory tf = TransformerFactory.newInstance();
+                StreamSource xsl = new StreamSource(servletContext.getResourceAsStream("WEB-INF/sklep-fo.xsl"));
+    
+                Transformer tr = tf.newTransformer(xsl);
+                Result res = new SAXResult(fop.getDefaultHandler());
+                tr.transform(src, res);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new WebApplicationException("Problem FOP " + e.getMessage(), e, 500);
+        }
+    }
+
+}

PC26-RestSerwer/src/main/java/sklep/rest/ext/PdfWriter.java

+package sklep.rest.ext;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+
+import jakarta.servlet.ServletContext;
+import jakarta.ws.rs.WebApplicationException;
+import jakarta.ws.rs.core.Context;
+import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.MultivaluedMap;
+import jakarta.ws.rs.ext.MessageBodyWriter;
+import jakarta.ws.rs.ext.Provider;
+import sklep.model.ProductList;
+
+@Provider
+public class PdfWriter implements MessageBodyWriter<ProductList> {
+    private static final MediaType PDF_TYPE = new MediaType("application", "pdf");
+
+    @Context
+    private ServletContext servletContext;
+
+    @Override
+    public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
+        return (type == ProductList.class) && PDF_TYPE.isCompatible(mediaType);
+
+    }
+
+    @Override
+    public void writeTo(ProductList obj, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType,
+            MultivaluedMap<String, Object> httpHeaders, OutputStream output)
+            throws IOException, WebApplicationException {
+        ObslugaXSL obslugaXSL = new ObslugaXSL(servletContext);
+        obslugaXSL.wypiszPDF(obj, output);
+        
+    }
+
+}