Returns the generic parameters of the given field. - Java Reflection

Java examples for Reflection:Field

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Description

Returns the generic parameters of the given field.

Demo Code

/*//  w w w. jav  a2s. c  o m
 * Copyright 2013 Balazs Berkes.
 *
 * 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 static java.lang.reflect.Modifier.isFinal;
import static java.lang.reflect.Modifier.isPublic;
import static java.lang.reflect.Modifier.isStatic;
import static org.mockannotations.utils.MockAnnotationValidationUtils.notNull;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class Main{
    /**
     * Returns the generic parameters of the given field.
     * <p>
     * @param field field to be scanned
     * @return the generic parameters
     */
    public static List<Type> getGenericParameters(Field field) {
        return getGenericParameters(field.getGenericType());
    }
    /**
     * Returns the generic parameters of the given type.
     * <p>
     * @param type field to be scanned
     * @return the generic parameters
     */
    public static List<Type> getGenericParameters(Type type) {
        List<Type> genericParameters = Collections.emptyList();

        if (type instanceof ParameterizedType) {
            genericParameters = new ArrayList<Type>();
            ParameterizedType parameterizedType = (ParameterizedType) type;
            genericParameters.addAll(Arrays.asList(parameterizedType
                    .getActualTypeArguments()));
        }

        return genericParameters;
    }
}

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