Fix telnet can not find method with enum type (apache#2803)

Author: LiZhenNet

dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/InvokeTelnetHandler.java

@@ -17,6 +17,7 @@
 package org.apache.dubbo.rpc.protocol.dubbo.telnet;
 
 import org.apache.dubbo.common.extension.Activate;
+import org.apache.dubbo.common.utils.CompatibleTypeUtils;
 import org.apache.dubbo.common.utils.PojoUtils;
 import org.apache.dubbo.common.utils.ReflectUtils;
 import org.apache.dubbo.common.utils.StringUtils;
@@ -75,6 +76,14 @@ private static boolean isMatch(Class<?>[] types, List<Object> args) {
             }
 
             if (ReflectUtils.isPrimitive(arg.getClass())) {
+                if (arg instanceof String && type.isEnum()) {
+                    try {
+                        CompatibleTypeUtils.compatibleTypeConvert(arg, type);
+                    } catch (RuntimeException e) {
+                        return false;
+                    }
+                    continue;
+                }
                 if (!ReflectUtils.isPrimitive(type)) {
                     return false;
                 }

dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/support/DemoService.java

@@ -47,7 +47,7 @@ public interface DemoService {
 
     Type enumlength(Type... types);
 
-//	Type enumlength(Type type);
+	Type getType(Type type);
 
     String get(CustomArgument arg1);
 

dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/support/DemoServiceImpl.java

@@ -71,8 +71,8 @@ public Type enumlength(Type... types) {
             return Type.Lower;
         return types[0];
     }
-
-    public Type enumlength(Type type) {
+    
+    public Type getType(Type type) {
         return type;
     }
 

dubbo-rpc/dubbo-rpc-dubbo/src/test/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/InvokerTelnetHandlerTest.java

@@ -108,6 +108,23 @@ public void testInvokeByPassingNullValue() throws RemotingException {
         }
     }
 
+    @Test
+    public void testInvokeByPassingEnumValue() throws RemotingException {
+        mockInvoker = mock(Invoker.class);
+        given(mockInvoker.getInterface()).willReturn(DemoService.class);
+        given(mockInvoker.getUrl()).willReturn(URL.valueOf("dubbo://127.0.0.1:20886/demo"));
+        given(mockInvoker.invoke(any(Invocation.class))).willReturn(new RpcResult("ok"));
+        mockChannel = mock(Channel.class);
+        given(mockChannel.getAttribute("telnet.service")).willReturn(null);
+        given(mockChannel.getLocalAddress()).willReturn(NetUtils.toAddress("127.0.0.1:5555"));
+        given(mockChannel.getRemoteAddress()).willReturn(NetUtils.toAddress("127.0.0.1:20886"));
+
+        DubboProtocol.getDubboProtocol().export(mockInvoker);
+        String result = invoke.telnet(mockChannel, "getType(\"High\")");
+        assertTrue(result.contains("ok"));
+    }
+
+
     @SuppressWarnings("unchecked")
     @Test
     public void testInvokeAutoFindMethod() throws RemotingException {