Java Reflection Assignable isAssignableFrom(Class toClass, Class fromClass)

Description

is Assignable From

License

Apache License

Declaration

public static boolean isAssignableFrom(Class<?> toClass,
            Class<?> fromClass) 

Method Source Code

//package com.java2s;
/*/*from   w  w  w . j ava  2s .  com*/
 * Copyright 2014-2015 the original author or authors.
 *
 * 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.util.HashMap;

import java.util.Map;

public class Main {
    protected static Map<Class<?>, Class<?>> wrapperToPrimitiveMap = new HashMap<Class<?>, Class<?>>();

    public static boolean isAssignableFrom(Class<?> toClass,
            Class<?> fromClass) {
        if (toClass == Object.class && !fromClass.isPrimitive()) {
            return true;
        }
        if (toClass.isPrimitive()) {
            fromClass = getPrimitiveClassIfWrapper(fromClass);
        }
        return toClass.isAssignableFrom(fromClass);
    }

    public static Class<?> getPrimitiveClassIfWrapper(Class<?> clazz) {
        Class<?> ret = getPrimitiveClass(clazz);
        if (ret != null) {
            return ret;
        }
        return clazz;
    }

    public static Class<?> getPrimitiveClass(Class<?> clazz) {
        return (Class<?>) wrapperToPrimitiveMap.get(clazz);
    }
}

Related

1. isAssignable(Class lhsType, Class rhsType)
2. isAssignable(final Class from, final Class to)
3. isAssignableFrom(Class class1, Class class2)
4. isAssignableFrom(Class to, Class from)
5. isAssignableFrom(Class to, Class from)
6. isAssignableValue(Class type, Object value)
7. isAssignableValue(Class type, Object value)
8. isClassAssignableFrom(Class formal, Class actual)
9. isCompatible(Class actualType, Class parameterType)