[#784] Add Result.exportXML() to retrieve a DOM Document similar to that of .formatXML()

jOOQ-test/src/org/jooq/test/jOOQAbstractTest.java

@@ -78,6 +78,7 @@ import java.util.concurrent.TimeUnit;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathExpressionException;
 import javax.xml.xpath.XPathFactory;
 
 import org.apache.commons.io.FileUtils;
@@ -3689,7 +3690,6 @@ public abstract class jOOQAbstractTest<
 
     @Test
     public void testFormatXML() throws Exception {
-        List<Field<?>> fields = TBook().getFields();
         Result<B> books = create().selectFrom(TBook()).fetch();
         String xml = books.formatXML();
         InputStream is = new ByteArrayInputStream(xml.getBytes());
@@ -3698,9 +3698,20 @@ public abstract class jOOQAbstractTest<
         DocumentBuilder db = dbf.newDocumentBuilder();
         Document doc = db.parse(is);
 
+        testXML(doc, books);
+    }
+
+    @Test
+    public void testExportXML() throws Exception {
+        Result<B> books = create().selectFrom(TBook()).fetch();
+        testXML(books.exportXML(), books);
+    }
+
+    private void testXML(Document doc, Result<B> books) throws XPathExpressionException {
         XPathFactory xpfactory = XPathFactory.newInstance();
         XPath xp = xpfactory.newXPath();
 
+        List<Field<?>> fields = TBook().getFields();
         assertEquals("1", xp.evaluate("count(/result)", doc));
         assertEquals("1", xp.evaluate("count(/result/fields)", doc));
         assertEquals("" + fields.size(),

jOOQ/src/main/java/org/jooq/Result.java

@@ -44,6 +44,8 @@ import java.sql.Time;
 import java.sql.Timestamp;
 import java.util.List;
 
+import org.w3c.dom.Document;
+
 /**
  * A wrapper for database results returned by <code>{@link SelectQuery}</code>
  *
@@ -1722,11 +1724,21 @@ public interface Result<R extends Record> extends FieldProvider, List<R>, Attach
     /**
      * Get this result formatted as XML
      *
+     * @see #exportXML()
      * @see <a
      *      href="http://www.jooq.org/xsd/jooq-export-1.6.2.xsd">http://www.jooq.org/xsd/jooq-export-1.6.2.xsd</a>
      */
     String formatXML();
 
+    /**
+     * Get this result as XML
+     * 
+     * @see #formatXML()
+     * @see <a
+     *      href="http://www.jooq.org/xsd/jooq-export-1.6.2.xsd">http://www.jooq.org/xsd/jooq-export-1.6.2.xsd</a>
+     */
+    Document exportXML();
+
     /**
      * Map resulting records onto a custom type.
      * <p>

jOOQ/src/main/java/org/jooq/impl/ResultImpl.java

@@ -58,6 +58,10 @@ import java.util.List;
 import java.util.ListIterator;
 import java.util.Map;
 
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
 import org.jooq.ArrayRecord;
 import org.jooq.Attachable;
 import org.jooq.AttachableInternal;
@@ -69,6 +73,8 @@ import org.jooq.RecordHandler;
 import org.jooq.Result;
 import org.jooq.Store;
 import org.jooq.tools.json.JSONObject;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
 
 /**
  * @author Lukas Eder
@@ -1177,6 +1183,53 @@ class ResultImpl<R extends Record> implements Result<R>, AttachableInternal {
         return sb.toString();
     }
 
+    @Override
+    public final Document exportXML() {
+        try {
+            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+            DocumentBuilder builder = factory.newDocumentBuilder();
+            Document document = builder.newDocument();
+
+            Element eResult = document.createElement("jooq-export:result");
+            eResult.setAttribute("xmlns:jooq-export", "http://www.jooq.org/xsd/jooq-export-1.6.2.xsd");
+            document.appendChild(eResult);
+
+            Element eFields = document.createElement("fields");
+            eResult.appendChild(eFields);
+
+            for (Field<?> field : getFields()) {
+                Element eField = document.createElement("field");
+                eField.setAttribute("name", field.getName());
+                eFields.appendChild(eField);
+            }
+
+            Element eRecords = document.createElement("records");
+            eResult.appendChild(eRecords);
+
+            for (Record record : this) {
+                Element eRecord = document.createElement("record");
+                eRecords.appendChild(eRecord);
+
+                for (Field<?> field : getFields()) {
+                    Object value = record.getValue(field);
+
+                    Element eValue = document.createElement("value");
+                    eValue.setAttribute("field", field.getName());
+                    eRecord.appendChild(eValue);
+
+                    if (value != null) {
+                        eValue.setTextContent(format0(value));
+                    }
+                }
+            }
+
+            return document;
+        }
+        catch (ParserConfigurationException ignore) {
+            throw new RuntimeException(ignore);
+        }
+    }
+
     private final String escapeXML(String string) {
         return StringUtils.replaceEach(string,
             new String[] { "\"", "'", "<", ">", "&" },