ENH: Add named DtoQuery, such that we can define native SQL queries in ebean mapping xml for DtoQuery.

src/main/java/io/ebeaninternal/xmlmapping/XmlMappingReader.java

@@ -1,11 +1,17 @@
 package io.ebeaninternal.xmlmapping;
 
 import io.ebeaninternal.xmlmapping.model.XmEbean;
-
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.List;
 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Unmarshaller;
-import java.io.InputStream;
+import org.avaje.classpath.scanner.Resource;
 
 public class XmlMappingReader {
 
@@ -24,4 +30,34 @@ public class XmlMappingReader {
       throw new RuntimeException(e);
     }
   }
+
+  public static List<XmEbean> readByResourceName(ClassLoader classLoader, String resourceName){
+    try {
+      Enumeration<URL> resources = classLoader.getResources(resourceName);
+      List<XmEbean> mappings = new ArrayList<>();
+      while (resources.hasMoreElements()) {
+        URL url = resources.nextElement();
+        try (InputStream is = url.openStream()) {
+          mappings.add(XmlMappingReader.read(is));
+        }
+      }
+      return mappings;
+    } catch (IOException e) {
+      throw new RuntimeException("Error reading ebean xml mapping", e);
+    }
+  }
+
+  public static List<XmEbean> readByResourceList(ClassLoader classLoader, List<Resource> resourceList){
+    try {
+      List<XmEbean> mappings = new ArrayList<>();
+      for (Resource xmlMappingRes : resourceList) {
+        try (InputStream is = new FileInputStream(xmlMappingRes.getLocationOnDisk())) {
+          mappings.add(XmlMappingReader.read(is));
+        }
+      }
+      return mappings;
+    } catch (IOException e) {
+      throw new RuntimeException("Error reading ebean xml mapping", e);
+    }
+  }
 }