Examples of org.exist.storage.serializers.Serializer

org.exist.storage.serializers.Serializer
Serializer base class, used to serialize a document or document fragment back to XML. A serializer may be obtained by calling DBBroker.getSerializer(). The class basically offers two overloaded methods: serialize() and toSAX(). serialize() returns the XML as a string, while toSAX() generates a stream of SAX events. The stream of SAX events is passed to the ContentHandler set by setContentHandler(). Internally, both types of methods pass events to a {@link org.exist.util.serializer.Receiver}. Subclasses thus have to implement the various serializeToReceiver() methods. Output can be configured through properties. Property keys are defined in classes {@link javax.xml.transform.OutputKeys} and {@link org.exist.storage.serializers.EXistOutputKeys} @author Wolfgang Meier

          pool = startDB();
          assertNotNull(pool);
          broker = pool.get(pool.getSecurityManager().getSystemSubject());
          assertNotNull(broker);
          
            Serializer serializer = broker.getSerializer();
            serializer.reset();            
            DocumentImpl doc = broker.getXMLResource(XmldbURI.ROOT_COLLECTION_URI.append("destination/test3/test.xml"), Lock.READ_LOCK);
            assertNotNull("Document should be null", doc);
      } catch (Exception e) {
        e.printStackTrace();
          fail(e.getMessage());

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      System.out.println("testRead() ...\n");
      pool = startDB();
      assertNotNull(pool);
      broker = pool.get(pool.getSecurityManager().getSystemSubject());
      assertNotNull(broker);
      Serializer serializer = broker.getSerializer();
      serializer.reset();


      DocumentImpl doc = broker.getXMLResource(XmldbURI.ROOT_COLLECTION_URI.append("test").append(testCollectionName).append("new_test.xml"), Lock.READ_LOCK);
      assertNotNull("Document should not be null", doc);
      String data = serializer.serialize(doc);
      assertNotNull(data);
      //System.out.println(data);
      doc.getUpdateLock().release(Lock.READ_LOCK);
      } catch (Exception e) {            
          fail(e.getMessage());

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      System.out.println("testReadAborted() ...\n");
      pool = startDB();
      assertNotNull(pool);
      broker = pool.get(pool.getSecurityManager().getSystemSubject());
      assertNotNull(broker);
      Serializer serializer = broker.getSerializer();
      serializer.reset();


      DocumentImpl doc = broker.getXMLResource(XmldbURI.ROOT_COLLECTION_URI.append("test").append(testCollectionName).append(subCollection).append("test2.xml"),  Lock.READ_LOCK);
      assertNotNull("Document should not be null", doc);
      String data = serializer.serialize(doc);
      assertNotNull(data);
      //System.out.println(data);
      doc.getUpdateLock().release(Lock.READ_LOCK);


      doc = broker.getXMLResource(XmldbURI.ROOT_COLLECTION_URI.append("test").append(testCollectionName).append("new_test2.xml"), Lock.READ_LOCK);

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    }
  
    @Test
    public void testOptimizations() throws XPathException, SAXException, PermissionDeniedException {
            
        Serializer serializer = broker.getSerializer();
        serializer.reset();
        DocumentSet docs = root.allDocs(broker, new DefaultDocumentSet(), true);


        System.out.println("------------ Testing NativeElementIndex.findChildNodesByTagName ---------");
        // parent set: 1.1.1; child set: 1.1.1.1, 1.1.1.2, 1.1.1.3, 1.1.2.1, 1.2.1
        ExtNodeSet nestedSet = (ExtNodeSet) executeQuery(broker, "//section[@n = '1.1.1']", 1, null);

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        }
        return seq;
    }


    private static String serialize(DBBroker broker, Item item) throws SAXException, XPathException {
        Serializer serializer = broker.getSerializer();
  
        serializer.reset();
        String value;
        if(Type.subTypeOf(item.getType(), Type.NODE)) {
            value = serializer.serialize((NodeValue) item);
        } else {  
            value = item.getStringValue();
        }
        return value;
    }

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      assertNotNull(docType);
      
      assertEquals("-//OASIS//DTD DITA Reference//EN", docType.getPublicId());
      
      Serializer serializer = broker.getSerializer();
      serializer.reset();
      
      serializer.setProperties(OUTPUT_PROPERTIES);
      
      String serialized = serializer.serialize(doc);


      System.out.println(serialized);
      assertTrue("Checking for Public Id in output", serialized.contains("-//OASIS//DTD DITA Reference//EN"));

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      assertNotNull(docType);
      
      assertEquals("-//OASIS//DTD DITA Topic//EN", docType.getPublicId());
      
      Serializer serializer = broker.getSerializer();
      serializer.reset();
      
      serializer.setProperties(OUTPUT_PROPERTIES);
      
      String serialized = serializer.serialize(doc);
      
      System.out.println(serialized);
      
      assertTrue("Checking for Public Id in output", serialized.contains("-//OASIS//DTD DITA Topic//EN"));

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            }
            
            Sequence seq = xquery.execute("/products", null, AccessContext.TEST);
            assertEquals(seq.getItemCount(), 1);
            
            Serializer serializer = broker.getSerializer();
            System.out.println(serializer.serialize((NodeValue) seq.itemAt(0)));
            
            seq = xquery.execute("//product", null, AccessContext.TEST);
            assertEquals(ITEMS_TO_APPEND, seq.getItemCount());
            
            seq = xquery.execute("//product[price > 0.0]", null, AccessContext.TEST);

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            }


            Sequence seq = xquery.execute("/products", null, AccessContext.TEST);
            assertEquals(seq.getItemCount(), 1);


            Serializer serializer = broker.getSerializer();
            System.out.println(serializer.serialize((NodeValue) seq.itemAt(0)));


            seq = xquery.execute("//product", null, AccessContext.TEST);
            assertEquals(ITEMS_TO_APPEND, seq.getItemCount());


            seq = xquery.execute("//product[@name = 'n20']", null, AccessContext.TEST);
            assertEquals(1, seq.getItemCount());


            store(broker, "attribs.xml", "<test attr1='aaa' attr2='bbb'>ccc</test>");
            query = "update insert attribute attr1 { 'eee' } into /test";


            System.out.println("testing duplicate attribute ...");
            xquery.execute(query, null, AccessContext.TEST);


            seq = xquery.execute("xmldb:document('" + TEST_COLLECTION + "/attribs.xml')/test[@attr1 = 'eee']", null, AccessContext.TEST);
            assertEquals(1, seq.getItemCount());
            System.out.println(serializer.serialize((NodeValue) seq.itemAt(0)));


            System.out.println("testAppendAttributes: PASS");
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());

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            }


            Sequence seq = xquery.execute("/products", null, AccessContext.TEST);
            assertEquals(seq.getItemCount(), 1);


            Serializer serializer = broker.getSerializer();
            System.out.println(serializer.serialize((NodeValue) seq.itemAt(0)));


            seq = xquery.execute("//product", null, AccessContext.TEST);
            assertEquals(ITEMS_TO_APPEND + 1, seq.getItemCount());


            seq = xquery.execute("//product[price > 0.0]", null, AccessContext.TEST);

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