org.springframework.core.enums.LetterCodedLabeledEnum Maven / Gradle / Ivy
/*
* Copyright 2002-2005 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.
*/
package org.springframework.core.enums;
import org.springframework.util.Assert;
/**
* Implementation of LabeledEnum which uses a letter as the code type.
*
* Should almost always be subclassed, but for some simple situations it may be
* used directly. Note that you will not be able to use unique type-based functionality
* like LabeledEnumResolver.getLabeledEnumSet(type) in this case.
*
* @author Keith Donald
* @since 1.2.2
*/
public class LetterCodedLabeledEnum extends AbstractGenericLabeledEnum {
/**
* The unique code of this enum.
*/
private final Character code;
/**
* Create a new LetterCodedLabeledEnum instance.
* @param code the letter code
* @param label the label (can be null)
*/
public LetterCodedLabeledEnum(char code, String label) {
super(label);
Assert.isTrue(Character.isLetter(code),
"The code '" + code + "' is invalid: it must be a letter");
this.code = new Character(code);
}
public Comparable getCode() {
return code;
}
/**
* Return the letter code of this LabeledEnum instance.
*/
public char getLetterCode() {
return ((Character) getCode()).charValue();
}
}