Fixes #5316 - Review <Map> element in Jetty XML.

Added class attribute and element to Map.

Signed-off-by: Simone Bordet <simone.bordet@gmail.com>

jetty-xml/src/main/java/org/eclipse/jetty/xml/XmlConfiguration.java

@@ -64,7 +64,6 @@ import org.eclipse.jetty.util.TypeUtil;
 import org.eclipse.jetty.util.annotation.Name;
 import org.eclipse.jetty.util.component.LifeCycle;
 import org.eclipse.jetty.util.resource.Resource;
-import org.eclipse.jetty.util.thread.AutoLock;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.xml.sax.SAXException;
@@ -1071,11 +1070,16 @@ public class XmlConfiguration
          */
         private Object newMap(Object obj, XmlParser.Node node) throws Exception
         {
-            AttrOrElementNode aoeNode = new AttrOrElementNode(node, "Id", "Entry");
+            AttrOrElementNode aoeNode = new AttrOrElementNode(node, "Id", "Entry", "Class");
             String id = aoeNode.getString("Id");
             List<XmlParser.Node> entries = aoeNode.getNodes("Entry");
+            String clazz = aoeNode.getString("Class");
+            if (clazz == null)
+                clazz = HashMap.class.getName();
+            @SuppressWarnings("unchecked")
+            Class<? extends Map<Object, Object>> oClass = Loader.loadClass(clazz);
 
-            Map<Object, Object> map = new HashMap<>();
+            Map<Object, Object> map = oClass.getConstructor().newInstance();
             if (id != null)
                 _configuration.getIdMap().put(id, map);
 

jetty-xml/src/main/resources/org/eclipse/jetty/xml/configure_10_0.dtd

@@ -259,8 +259,8 @@ This is equivalent to:
  Map m = new HashMap();
  m.put("keyName", new String("value1"));
 -->
-<!ELEMENT Map (Id?,Entry*) >
+<!ELEMENT Map (Id?,Class?,Entry*) >
-<!ATTLIST Map %ID_ATTR; >
+<!ATTLIST Map %ID_ATTR; %CLASS_ATTR; >
 <!ELEMENT Entry (Item,Item) >
 
 

jetty-xml/src/test/java/org/eclipse/jetty/xml/XmlConfigurationTest.java

@@ -33,6 +33,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.stream.Collectors;
 
@@ -172,6 +173,11 @@ public class XmlConfigurationTest
         Map<String, String> map = (Map<String, String>)configuration.getIdMap().get("map");
         assertEquals(map.get("key0"), "value0");
         assertEquals(map.get("key1"), "value1");
+
+        @SuppressWarnings("unchecked")
+        Map<String, String> concurrentMap = (Map<String, String>)configuration.getIdMap().get("concurrentMap");
+        assertThat(concurrentMap, instanceOf(ConcurrentMap.class));
+        assertEquals(concurrentMap.get("KEY"), "ITEM");
     }
 
     @ParameterizedTest

jetty-xml/src/test/resources/org/eclipse/jetty/xml/configureWithAttr.xml

@@ -132,6 +132,13 @@
     </Entry>
   </Map>
 
+  <Map id="concurrentMap" class="java.util.concurrent.ConcurrentHashMap">
+    <Entry>
+      <Item>KEY</Item>
+      <Item>ITEM</Item>
+    </Entry>
+  </Map>
+
 </Configure>
 
 

jetty-xml/src/test/resources/org/eclipse/jetty/xml/configureWithElements.xml

@@ -172,6 +172,15 @@
     </Entry>
   </Map>
 
+  <Map>
+    <Id>concurrentMap</Id>
+    <Class>java.util.concurrent.ConcurrentHashMap</Class>
+    <Entry>
+      <Item>KEY</Item>
+      <Item>ITEM</Item>
+    </Entry>
+  </Map>
+
 </Configure>