001package ball.lang; 002/*- 003 * ########################################################################## 004 * Utilities 005 * $Id: PrimitiveTypeMap.java 5855 2020-04-27 20:01:17Z ball $ 006 * $HeadURL: svn+ssh://svn.hcf.dev/var/spool/scm/repository.svn/ball-util/trunk/src/main/java/ball/lang/PrimitiveTypeMap.java $ 007 * %% 008 * Copyright (C) 2008 - 2020 Allen D. Ball 009 * %% 010 * Licensed under the Apache License, Version 2.0 (the "License"); 011 * you may not use this file except in compliance with the License. 012 * You may obtain a copy of the License at 013 * 014 * http://www.apache.org/licenses/LICENSE-2.0 015 * 016 * Unless required by applicable law or agreed to in writing, software 017 * distributed under the License is distributed on an "AS IS" BASIS, 018 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 019 * See the License for the specific language governing permissions and 020 * limitations under the License. 021 * ########################################################################## 022 */ 023import java.util.Collections; 024import java.util.HashMap; 025import java.util.Map; 026 027/** 028 * Provides mapping of Java primitive {@link Class}es to their "wrapper" 029 * {@link Class}es. 030 * 031 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball} 032 * @version $Revision: 5855 $ 033 */ 034public class PrimitiveTypeMap extends HashMap<Class<?>,Class<?>> { 035 private static final long serialVersionUID = 542657344546950531L; 036 037 /** 038 * Unmodifiable instance of a {@link PrimitiveTypeMap}. 039 */ 040 public static final Map<Class<?>,Class<?>> INSTANCE = 041 Collections.unmodifiableMap(new PrimitiveTypeMap()); 042 043 /** 044 * Sole constructor. 045 */ 046 public PrimitiveTypeMap() { 047 super(); 048 049 put(Boolean.TYPE, Boolean.class); 050 put(Byte.TYPE, Byte.class); 051 put(Character.TYPE, Character.class); 052 put(Double.TYPE, Double.class); 053 put(Float.TYPE, Float.class); 054 put(Integer.TYPE, Integer.class); 055 put(Long.TYPE, Long.class); 056 put(Short.TYPE, Short.class); 057 put(Void.TYPE, Void.class); 058 } 059 060 /** 061 * Static method to get the "boxed" {@link Class} for a Java primitive 062 * {@link Class}. 063 * 064 * @param type The {@link Class}. 065 * 066 * @return The "boxed" {@link Class} if the argument {@link Class} is a 067 * primitive type; the argument otherwise. 068 */ 069 public static Class<?> asBoxedType(Class<?> type) { 070 return (type != null && type.isPrimitive()) ? INSTANCE.get(type) : type; 071 } 072}