Java Reflection Generic Parameter getGenericParameterList(Type type)

Description

get Generic Parameter List

License

Apache License

Declaration

protected static List<Type> getGenericParameterList(Type type) 

Method Source Code

//package com.java2s;
/*/*from   w  ww  .  ja v a  2  s  .c  o m*/
 * Copyright 2004-2011 the Seasar Foundation and the Others.
 *
 * 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.lang.reflect.GenericArrayType;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

import java.util.Arrays;
import java.util.Collections;

import java.util.List;

public class Main {
    protected static List<Type> getGenericParameterList(Type type) {
        if (ParameterizedType.class.isInstance(type)) {
            final ParameterizedType paramType = ParameterizedType.class
                    .cast(type);
            return Arrays.asList(paramType.getActualTypeArguments());
        }
        if (GenericArrayType.class.isInstance(type)) {
            final GenericArrayType arrayType = GenericArrayType.class
                    .cast(type);
            return getGenericParameterList(arrayType
                    .getGenericComponentType());
        }
        @SuppressWarnings("unchecked")
        List<Type> emptyList = Collections.EMPTY_LIST;
        return emptyList;
    }
}

Related

1. getGeneric(ParameterizedType type)
2. getGenericParameter(final Type type)
3. getGenericParameter(final Type type, final int index)
4. getGenericParameters(final Type type)
5. getGenericParameterType(Method method, int paramIdx)
6. getGenericParameterType(Type type, int index)
7. getGenericParameterTypes(final Type type)