Java/Reflection/Return Type

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Return Retrurns the Type of the given Field or Method

   <source lang="java">
 

// $Id: ReflectionHelper.java 16271 2009-04-07 20:20:12Z hardy.ferentschik $ /*

  • JBoss, Home of Professional Open Source
  • Copyright 2008, Red Hat Middleware LLC, and individual contributors
  • by the @authors tag. See the copyright.txt in the distribution for a
  • full listing of individual contributors.
  • Licensed under the Apache License, Version 2.0 (the "License");
  • you may not use this file except in compliance with the License.
  • You may obtain a copy of the License at
  • http://www.apache.org/licenses/LICENSE-2.0
  • Unless required by applicable law or agreed to in writing, software
  • distributed under the License is distributed on an "AS IS" BASIS,
  • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  • See the License for the specific language governing permissions and
  • limitations under the License.
  • /

import java.beans.Introspector; import java.lang.annotation.Annotation; import java.lang.reflect.AccessibleObject; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Member; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.lang.reflect.ParameterizedType; import java.lang.reflect.Type; import java.lang.reflect.WildcardType; import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.List; import java.util.Map;

/**

* Some reflection utility methods.
*
* @author Hardy Ferentschik
*/

public class ReflectionHelper {

 /**
  * @param member The Member instance for which to retrieve the type.
  *
  * @return Retrurns the Type of the given Field or Method.
  *
  * @throws IllegalArgumentException in case member is not a Field or Method.
  */
 public static Type typeOf(Member member) {
   if ( member instanceof Field ) {
     return ( ( Field ) member ).getGenericType();
   }
   if ( member instanceof Method ) {
     return ( ( Method ) member ).getGenericReturnType();
   }
   throw new IllegalArgumentException( "Member " + member + " is neither a field nor a method" );
 }

}


 </source>
   
  
 
  



Returns the type of the field of return type of a method.

   <source lang="java">
 

// $Id: ReflectionHelper.java 16271 2009-04-07 20:20:12Z hardy.ferentschik $ /*

  • JBoss, Home of Professional Open Source
  • Copyright 2008, Red Hat Middleware LLC, and individual contributors
  • by the @authors tag. See the copyright.txt in the distribution for a
  • full listing of individual contributors.
  • Licensed under the Apache License, Version 2.0 (the "License");
  • you may not use this file except in compliance with the License.
  • You may obtain a copy of the License at
  • http://www.apache.org/licenses/LICENSE-2.0
  • Unless required by applicable law or agreed to in writing, software
  • distributed under the License is distributed on an "AS IS" BASIS,
  • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  • See the License for the specific language governing permissions and
  • limitations under the License.
  • /

import java.beans.Introspector; import java.lang.annotation.Annotation; import java.lang.reflect.AccessibleObject; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Member; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.lang.reflect.ParameterizedType; import java.lang.reflect.Type; import java.lang.reflect.WildcardType; import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.List; import java.util.Map;

/**

* Some reflection utility methods.
*
* @author Hardy Ferentschik
*/

public class ReflectionHelper {

 /**
  * Returns the type of the field of return type of a method.
  *
  * @param member the member for which to get the type.
  *
  * @return Returns the type of the field of return type of a method.
  */
 public static Class<?> getType(Member member) {
   Class<?> type = null;
   if ( member instanceof Field ) {
     type = ( ( Field ) member ).getType();
   }
   if ( member instanceof Method ) {
     type = ( ( Method ) member ).getReturnType();
   }
   return type;
 }

}


 </source>