[Bug 380924] xmlconfiguration <Configure and <New supports named constructors, including dynamic ordering of parameters

jetty-util/src/main/java/org/eclipse/jetty/util/TypeUtil.java

@@ -15,6 +15,7 @@ package org.eclipse.jetty.util;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.annotation.Annotation;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -23,7 +24,9 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
+import org.eclipse.jetty.util.annotation.Name;
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 
@@ -565,4 +568,65 @@ public class TypeUtil
         }
         throw new NoSuchMethodException("<init>");
     }
+    
+    public static Object construct(Class<?> klass, Object[] arguments, Map<String, Object> namedArgMap) throws InvocationTargetException, NoSuchMethodException
+    {
+        for (Constructor<?> constructor : klass.getConstructors())
+        {
+            if (constructor.getParameterTypes().length != arguments.length)
+                continue;
+
+            try
+            {
+                Annotation[][] parameterAnnotations = constructor.getParameterAnnotations();
+                
+                // target has no annotations
+                if ( parameterAnnotations == null || parameterAnnotations.length == 0 )
+                {                
+                    LOG.debug("Target has no parameter annotations");                   
+                    return constructor.newInstance(arguments);
+                }
+                else
+                {
+                   Object[] swizzled = new Object[arguments.length];
+                   
+                   int count = 0;
+                   for ( Annotation[] annotations : parameterAnnotations )
+                   {
+                       for ( Annotation annotation : annotations)
+                       {
+                           if ( annotation instanceof Name )
+                           {
+                               Name param = (Name)annotation;
+                               
+                               if (namedArgMap.containsKey(param.value()))
+                               {
+                                   LOG.debug("placing named {} in position {}", param.value(), count);
+                                   swizzled[count] = namedArgMap.get(param.value());
+                               }
+                               else
+                               {
+                                   LOG.debug("placing {} in position {}", arguments[count], count);
+                                   swizzled[count] = arguments[count];
+                               }
+                               ++count;
+                           }
+                           else
+                           {
+                               LOG.debug("passing on annotation {}", annotation);
+                           }
+                       }
+                   }
+                   
+                   return constructor.newInstance(swizzled);
+                }
+                
+            }
+            catch (InstantiationException | IllegalAccessException | IllegalArgumentException e)
+            {
+                LOG.ignore(e);
+            }
+        }
+        throw new NoSuchMethodException("<init>");
+    }
 }

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

@@ -33,6 +33,7 @@ import java.util.Collection;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
@@ -49,6 +50,7 @@ import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 import org.eclipse.jetty.util.resource.Resource;
 import org.eclipse.jetty.xml.XmlParser.Node;
+import org.junit.Assert;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 
@@ -341,29 +343,50 @@ public class XmlConfiguration
             String id = _config.getAttribute("id");
             Object obj = id == null ? null : _idMap.get(id);
 
+            
+            
             int index = _config.size();
             if (obj == null && oClass != null)
             {
-                List<Object> arguments = new ArrayList<>();
+                Map<String, Object> namedArgMap = new HashMap<String, Object>();
+                
+                List<Object> arguments = new LinkedList<>();
                 for (int i = 0; i < _config.size(); i++)
                 {
                     Object o = _config.get(i);
                     if (o instanceof String)
+                    {
                         continue;
-                    if (!((XmlParser.Node)o).getTag().equals("Arg"))
+                    }
+                    XmlParser.Node node = (XmlParser.Node)o;
+                    
+                    if (!(node.getTag().equals("Arg")))
                     {
                         index = i;
                         break;
                     }
                     else
                     {
+                        String namedAttribute = node.getAttribute("name");
+                        if ( namedAttribute != null )
+                        {
+                            namedArgMap.put(namedAttribute,value(obj,(XmlParser.Node)o));
+                        }
+                        
                         arguments.add(value(obj, (XmlParser.Node)o));
                     }
                 }
 
                 try
                 {
-                    obj = TypeUtil.construct(oClass, arguments.toArray());
+                    if ( namedArgMap.size() > 0 )
+                    {
+                        obj = TypeUtil.construct(oClass, arguments.toArray(), namedArgMap);
+                    }
+                    else
+                    {
+                        obj = TypeUtil.construct(oClass, arguments.toArray());
+                    }
                 }
                 catch (NoSuchMethodException x)
                 {
@@ -780,13 +803,29 @@ public class XmlConfiguration
                 size++;
             }
 
+            Map<String, Object> namedArgMap = new HashMap<String, Object>();
+            List<Object> arguments = new LinkedList<>();
+            
             Object[] arg = new Object[size];
             for (int i = 0, j = 0; j < size; i++)
             {
                 Object o = node.get(i);
+                
+                XmlParser.Node argNode = (XmlParser.Node)o;
                 if (o instanceof String)
+                {
                     continue;
+                }
+                
                 arg[j++] = value(obj,(XmlParser.Node)o);
+                
+                String namedAttribute = argNode.getAttribute("name");
+                if ( namedAttribute != null )
+                {
+                    namedArgMap.put(namedAttribute,value(obj,(XmlParser.Node)o));
+                }
+                
+                arguments.add(value(obj,(XmlParser.Node)o));
             }
 
             if (LOG.isDebugEnabled())
@@ -794,7 +833,18 @@ public class XmlConfiguration
 
             try
             {
-                Object n = TypeUtil.construct(oClass, arg);
+                Object n;
+                if ( namedArgMap.size() > 0 )
+                {
+                   LOG.debug("using named mapping");
+                   n = TypeUtil.construct(oClass, arguments.toArray(), namedArgMap);
+                }
+                else
+                {
+                    LOG.debug("using normal mapping");
+                    n = TypeUtil.construct(oClass, arguments.toArray());
+                }
+                
                 configure(n,node,argi);
                 return n;
             }

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

@@ -8,6 +8,8 @@ public class AnnotatedTestConfiguration
     private String second;
     private String third;
     
+    AnnotatedTestConfiguration nested;
+    
     public AnnotatedTestConfiguration(@Name("first") String first, @Name("second") String second, @Name("third") String third)
     {
         this.first = first;
@@ -45,6 +47,14 @@ public class AnnotatedTestConfiguration
         this.third = third;
     }
 
-    
+    public AnnotatedTestConfiguration getNested()
+    {
+        return nested;
+    }
+
+    public void setNested(AnnotatedTestConfiguration nested)
+    {
+        this.nested = nested;
+    }
     
 }

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

@@ -377,6 +377,7 @@ public class XmlConfigurationTest
         Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
     }
     
+    @Test
     public void testConstructorNamedInjectionUnOrdered() throws Exception
     {
         XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
@@ -393,6 +394,7 @@ public class XmlConfigurationTest
         Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
     }
     
+    @Test
     public void testConstructorNamedInjectionOrderedMixed() throws Exception
     {
         XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
@@ -409,6 +411,7 @@ public class XmlConfigurationTest
         Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
     }
     
+    @Test
     public void testConstructorNamedInjectionUnorderedMixed() throws Exception
     {
         XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
@@ -424,4 +427,140 @@ public class XmlConfigurationTest
         Assert.assertEquals("second parameter not wired correctly","arg2", atc.getSecond());
         Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
     }
+    
+    @Test
+    public void testNestedConstructorNamedInjection() throws Exception
+    {
+        XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
+                "<Configure class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "  <Arg>arg1</Arg>  " +
+                "  <Arg>arg2</Arg>  " +
+                "  <Arg>arg3</Arg>  " +
+                "  <Set name=\"nested\">  " +
+                "    <New class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "      <Arg>arg1</Arg>  " +
+                "      <Arg>arg2</Arg>  " +
+                "      <Arg>arg3</Arg>  " +
+                "    </New>" +
+                "  </Set>" +
+                "</Configure>");
+        
+        AnnotatedTestConfiguration atc = (AnnotatedTestConfiguration)xmlConfiguration.configure();
+        
+        Assert.assertEquals("first parameter not wired correctly","arg1", atc.getFirst());
+        Assert.assertEquals("second parameter not wired correctly","arg2", atc.getSecond());
+        Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
+        Assert.assertEquals("nested first parameter not wired correctly","arg1", atc.getNested().getFirst());
+        Assert.assertEquals("nested second parameter not wired correctly","arg2", atc.getNested().getSecond());
+        Assert.assertEquals("nested third parameter not wired correctly","arg3", atc.getNested().getThird());
+        
+    }
+    
+    @Test
+    public void testNestedConstructorNamedInjectionOrdered() throws Exception
+    {
+        XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
+                "<Configure class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "  <Arg name=\"first\">arg1</Arg>  " +
+                "  <Arg name=\"second\">arg2</Arg>  " +
+                "  <Arg name=\"third\">arg3</Arg>  " +
+                "  <Set name=\"nested\">  " +
+                "    <New class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "      <Arg name=\"first\">arg1</Arg>  " +
+                "      <Arg name=\"second\">arg2</Arg>  " +
+                "      <Arg name=\"third\">arg3</Arg>  " +
+                "    </New>" +
+                "  </Set>" +
+                "</Configure>");
+        
+        AnnotatedTestConfiguration atc = (AnnotatedTestConfiguration)xmlConfiguration.configure();
+        
+        Assert.assertEquals("first parameter not wired correctly","arg1", atc.getFirst());
+        Assert.assertEquals("second parameter not wired correctly","arg2", atc.getSecond());
+        Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
+        Assert.assertEquals("nested first parameter not wired correctly","arg1", atc.getNested().getFirst());
+        Assert.assertEquals("nested second parameter not wired correctly","arg2", atc.getNested().getSecond());
+        Assert.assertEquals("nested third parameter not wired correctly","arg3", atc.getNested().getThird());
+    }
+    
+    @Test
+    public void testNestedConstructorNamedInjectionUnOrdered() throws Exception
+    {
+        XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
+                "<Configure class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "  <Arg name=\"first\">arg1</Arg>  " +
+                "  <Arg name=\"third\">arg3</Arg>  " +
+                "  <Arg name=\"second\">arg2</Arg>  " +
+                "  <Set name=\"nested\">  " +
+                "    <New class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "      <Arg name=\"first\">arg1</Arg>  " +
+                "      <Arg name=\"third\">arg3</Arg>  " +
+                "      <Arg name=\"second\">arg2</Arg>  " +
+                "    </New>" +
+                "  </Set>" +
+                "</Configure>");
+        
+        AnnotatedTestConfiguration atc = (AnnotatedTestConfiguration)xmlConfiguration.configure();
+        
+        Assert.assertEquals("first parameter not wired correctly","arg1", atc.getFirst());
+        Assert.assertEquals("second parameter not wired correctly","arg2", atc.getSecond());
+        Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
+        Assert.assertEquals("nested first parameter not wired correctly","arg1", atc.getNested().getFirst());
+        Assert.assertEquals("nested second parameter not wired correctly","arg2", atc.getNested().getSecond());
+        Assert.assertEquals("nested third parameter not wired correctly","arg3", atc.getNested().getThird());
+    }
+    
+    @Test
+    public void testNestedConstructorNamedInjectionOrderedMixed() throws Exception
+    {
+        XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
+                "<Configure class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "  <Arg name=\"first\">arg1</Arg>  " +
+                "  <Arg>arg2</Arg>  " +
+                "  <Arg name=\"third\">arg3</Arg>  " +
+                "  <Set name=\"nested\">  " +
+                "    <New class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "      <Arg name=\"first\">arg1</Arg>  " +
+                "      <Arg>arg2</Arg>  " +
+                "      <Arg name=\"third\">arg3</Arg>  " +
+                "    </New>" +
+                "  </Set>" +
+                "</Configure>");
+        
+        AnnotatedTestConfiguration atc = (AnnotatedTestConfiguration)xmlConfiguration.configure();
+        
+        Assert.assertEquals("first parameter not wired correctly","arg1", atc.getFirst());
+        Assert.assertEquals("second parameter not wired correctly","arg2", atc.getSecond());
+        Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
+        Assert.assertEquals("nested first parameter not wired correctly","arg1", atc.getNested().getFirst());
+        Assert.assertEquals("nested second parameter not wired correctly","arg2", atc.getNested().getSecond());
+        Assert.assertEquals("nested third parameter not wired correctly","arg3", atc.getNested().getThird());
+    }
+    
+    @Test
+    public void testNestedConstructorNamedInjectionUnorderedMixed() throws Exception
+    {
+        XmlConfiguration xmlConfiguration = new XmlConfiguration("" +
+                "<Configure class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "  <Arg name=\"third\">arg3</Arg>  " +
+                "  <Arg>arg2</Arg>  " +
+                "  <Arg name=\"first\">arg1</Arg>  " +
+                "  <Set name=\"nested\">  " +
+                "    <New class=\"org.eclipse.jetty.xml.AnnotatedTestConfiguration\">" +
+                "      <Arg name=\"third\">arg3</Arg>  " +
+                "      <Arg>arg2</Arg>  " +
+                "      <Arg name=\"first\">arg1</Arg>  " +
+                "    </New>" +
+                "  </Set>" +
+                "</Configure>");
+        
+        AnnotatedTestConfiguration atc = (AnnotatedTestConfiguration)xmlConfiguration.configure();
+        
+        Assert.assertEquals("first parameter not wired correctly","arg1", atc.getFirst());
+        Assert.assertEquals("second parameter not wired correctly","arg2", atc.getSecond());
+        Assert.assertEquals("third parameter not wired correctly","arg3", atc.getThird());
+        Assert.assertEquals("nested first parameter not wired correctly","arg1", atc.getNested().getFirst());
+        Assert.assertEquals("nested second parameter not wired correctly","arg2", atc.getNested().getSecond());
+        Assert.assertEquals("nested third parameter not wired correctly","arg3", atc.getNested().getThird());
+    }
 }

jetty-xml/src/test/resources/jetty-logging.properties

@@ -0,0 +1,3 @@
+org.eclipse.jetty.util.log.class=org.eclipse.jetty.util.log.StdErrLog
+org.eclipse.jetty.xml.LEVEL=DEBUG
+org.eclipse.jetty.util.LEVEL=DEBUG