Use JCommander resolver in combination with others.

Prepare for implementation of describe()

spring-shell2-jcommander-adapter/src/main/java/org/springframework/shell2/jcommander/JCommanderParameterResolver.java

@@ -21,6 +21,7 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.stream.Stream;
 
 import com.beust.jcommander.DynamicParameter;
 import com.beust.jcommander.JCommander;
@@ -33,6 +34,7 @@ import org.springframework.shell2.CompletionContext;
 import org.springframework.shell2.CompletionProposal;
 import org.springframework.shell2.ParameterDescription;
 import org.springframework.shell2.ParameterResolver;
+import org.springframework.stereotype.Component;
 import org.springframework.util.ReflectionUtils;
 
 /**
@@ -40,6 +42,7 @@ import org.springframework.util.ReflectionUtils;
  *
  * @author Eric Bottard
  */
+@Component
 public class JCommanderParameterResolver implements ParameterResolver {
 
 	private static final Collection<Class<? extends Annotation>> JCOMMANDER_ANNOTATIONS =
@@ -80,7 +83,7 @@ public class JCommanderParameterResolver implements ParameterResolver {
 	}
 
 	@Override
-	public ParameterDescription describe(MethodParameter parameter) {
+	public Stream<ParameterDescription> describe(MethodParameter parameter) {
 		throw new UnsupportedOperationException();
 	}
 

spring-shell2-jcommander-adapter/src/test/java/org/springframework/shell2/jcommander/FieldCollins.java

@@ -22,7 +22,10 @@ import java.util.List;
 import com.beust.jcommander.Parameter;
 
 /**
- * Created by ericbottard on 15/12/15.
+ * A POJO with fields annotated with JCommander annotations.
+ *
+ * @author Eric Bottard
+ * @see MyLordCommands#genesis(FieldCollins)
  */
 public class FieldCollins {
 

spring-shell2-jcommander-adapter/src/test/java/org/springframework/shell2/jcommander/JCommanderParameterResolverTest.java

@@ -28,7 +28,10 @@ import org.springframework.shell2.Utils;
 import org.springframework.util.ReflectionUtils;
 
 /**
- * Created by ericbottard on 15/12/15.
+ * Unit test for {@link JCommanderParameterResolver}.
+ *
+ * @author Eric Bottard
+ * @author Florent Biville
  */
 public class JCommanderParameterResolverTest {
 

spring-shell2-jcommander-adapter/src/test/java/org/springframework/shell2/jcommander/MyLordCommands.java

@@ -17,14 +17,22 @@
 package org.springframework.shell2.jcommander;
 
 /**
- * Created by ericbottard on 15/12/15.
+ * An hypothetical command class, with one method using JCommander args, and the other not.
+ *
+ * @author Eric Bottard
  */
 public class MyLordCommands {
 
+	/**
+	 * This method should be supported.
+	 */
 	public void genesis(FieldCollins fieldCollins) {
 
 	}
 
+	/**
+	 * This method is not.
+	 */
 	public void apocalypse(String param) {
 
 	}