Java String Value Of valueOfNullSafe(final Class enumType, final String name)

Description

Returns the enum constant of the specified enum type with the specified name.

License

Apache License

Parameter

Parameter	Description
enumType	the Class object of the enum type from which to return a constant
name	the name of the constant to return

Return

the enum constant of the specified enum type with the specified name or null if not found

Declaration

public static <E extends Enum<E>> E valueOfNullSafe(final Class<E> enumType, final String name) 

Method Source Code

//package com.java2s;
/**/*from   w ww.j av  a  2  s. c o  m*/
 * Copyright (C) [2013] [The FURTHeR Project]
 *
 * 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.
 */

public class Main {
    /**
     * Returns the enum constant of the specified enum type with the specified name. The
     * name must match exactly an identifier used to declare an enum constant in this
     * type. If it does not, this method returns <code>null</code>.
     *
     * @param enumType
     *            the Class object of the enum type from which to return a constant
     * @param name
     *            the name of the constant to return
     * @return the enum constant of the specified enum type with the specified name or
     *         <code>null</code> if not found
     * @see {link Enum.valueOf}
     */
    public static <E extends Enum<E>> E valueOfNullSafe(final Class<E> enumType, final String name) {
        try {
            return Enum.valueOf(enumType, name);
        } catch (final IllegalArgumentException e) {
            return null;
        } catch (final NullPointerException e) {
            return null;
        }
    }

    /**
     * Returns the enum constant of the specified enum type with the specified name. The
     * name must match exactly an identifier used to declare an enum constant in this
     * type. If it does not, this method returns <code>null</code>.
     *
     * @param enumType
     *            the Class object of the enum type from which to return a constant
     * @param name
     *            the name of the constant to return
     * @return the enum constant of the specified enum type with the specified name or
     *         <code>null</code> if not found
     * @see {link Enum.valueOf}
     */
    public static <E extends Enum<E>> E valueOfNullSafe(final Class<E> enumType, final Object object) {
        return (object == null) ? null : valueOfNullSafe(enumType, object.toString());
    }

    /**
     * Convert a string to an enum. Encapsulates unchecked warning suppression.
     *
     * @param enumType
     * @param value
     * @return
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static Enum<?> valueOf(final Class<?> enumType, final String value) {
        return Enum.valueOf((Class<Enum>) enumType, value);
    }
}

Related

1. valueOfIgnoreCase(Class cls, String value)
2. valueOfIgnoreCase(Class enumType, String constantName)
3. valueOfInteger(final String s, int radix)
4. valueOfIpv4(String ip)
5. valueOfLongToString(long[] values)
6. valueOfOrEmptyString(final Object object)
7. valueOfString(String str, int len)
8. ValueOfString(String value)
9. valueOfStringToLong(String[] values)