org.apache.taglibs.standard.lang.jstl.PrimitiveObjects Maven / Gradle / Ivy
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/*
* Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
* Copyright 2004 The Apache Software Foundation
*
* 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.apache.taglibs.standard.lang.jstl;
/**
*
* This converts primitive values to their Object counterparts.
* For bytes and chars, values from 0 to 255 are cached. For shorts,
* ints, and longs, values -1000 to 1000 are cached.
*
* @author Nathan Abramson - Art Technology Group
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: jluehe $
**/
class PrimitiveObjects
{
//-------------------------------------
// Constants
//-------------------------------------
static int BYTE_LOWER_BOUND = 0;
static int BYTE_UPPER_BOUND = 255;
static int CHARACTER_LOWER_BOUND = 0;
static int CHARACTER_UPPER_BOUND = 255;
static int SHORT_LOWER_BOUND = -1000;
static int SHORT_UPPER_BOUND = 1000;
static int INTEGER_LOWER_BOUND = -1000;
static int INTEGER_UPPER_BOUND = 1000;
static int LONG_LOWER_BOUND = -1000;
static int LONG_UPPER_BOUND = 1000;
//-------------------------------------
// Member variables
//-------------------------------------
static Byte [] mBytes = createBytes ();
static Character [] mCharacters = createCharacters ();
static Short [] mShorts = createShorts ();
static Integer [] mIntegers = createIntegers ();
static Long [] mLongs = createLongs ();
//-------------------------------------
// Getting primitive values
//-------------------------------------
public static Boolean getBoolean (boolean pValue)
{
return
pValue ?
Boolean.TRUE :
Boolean.FALSE;
}
//-------------------------------------
public static Byte getByte (byte pValue)
{
int iValue = pValue & 0xff;
if (iValue >= BYTE_LOWER_BOUND &&
iValue <= BYTE_UPPER_BOUND) {
return mBytes [iValue - BYTE_LOWER_BOUND];
}
else {
return Byte.valueOf(pValue);
}
}
//-------------------------------------
public static Character getCharacter (char pValue)
{
if (pValue >= CHARACTER_LOWER_BOUND &&
pValue <= CHARACTER_UPPER_BOUND) {
return mCharacters [((int) pValue) - CHARACTER_LOWER_BOUND];
}
else {
return Character.valueOf(pValue);
}
}
//-------------------------------------
public static Short getShort (short pValue)
{
if (pValue >= SHORT_LOWER_BOUND &&
pValue <= SHORT_UPPER_BOUND) {
return mShorts [((int) pValue) - SHORT_LOWER_BOUND];
}
else {
return Short.valueOf(pValue);
}
}
//-------------------------------------
public static Integer getInteger (int pValue)
{
if (pValue >= INTEGER_LOWER_BOUND &&
pValue <= INTEGER_UPPER_BOUND) {
return mIntegers [((int) pValue) - INTEGER_LOWER_BOUND];
}
else {
return Integer.valueOf(pValue);
}
}
//-------------------------------------
public static Long getLong (long pValue)
{
if (pValue >= LONG_LOWER_BOUND &&
pValue <= LONG_UPPER_BOUND) {
return mLongs [((int) pValue) - LONG_LOWER_BOUND];
}
else {
return Long.valueOf(pValue);
}
}
//-------------------------------------
public static Float getFloat (float pValue)
{
return Float.valueOf(pValue);
}
//-------------------------------------
public static Double getDouble (double pValue)
{
return Double.valueOf(pValue);
}
//-------------------------------------
// Object class equivalents of primitive classes
//-------------------------------------
/**
*
* If the given class is a primitive class, returns the object
* version of that class. Otherwise, the class is just returned.
**/
public static Class getPrimitiveObjectClass (Class pClass)
{
if (pClass == Boolean.TYPE) {
return Boolean.class;
}
else if (pClass == Byte.TYPE) {
return Byte.class;
}
else if (pClass == Short.TYPE) {
return Short.class;
}
else if (pClass == Character.TYPE) {
return Character.class;
}
else if (pClass == Integer.TYPE) {
return Integer.class;
}
else if (pClass == Long.TYPE) {
return Long.class;
}
else if (pClass == Float.TYPE) {
return Float.class;
}
else if (pClass == Double.TYPE) {
return Double.class;
}
else {
return pClass;
}
}
//-------------------------------------
// Initializing the cached values
//-------------------------------------
static Byte [] createBytes ()
{
int len = BYTE_UPPER_BOUND - BYTE_LOWER_BOUND + 1;
Byte [] ret = new Byte [len];
byte val = (byte) BYTE_LOWER_BOUND;
for (int i = 0; i < len; i++, val++) {
ret [i] = Byte.valueOf(val);
}
return ret;
}
//-------------------------------------
static Character [] createCharacters ()
{
int len = CHARACTER_UPPER_BOUND - CHARACTER_LOWER_BOUND + 1;
Character [] ret = new Character [len];
char val = (char) CHARACTER_LOWER_BOUND;
for (int i = 0; i < len; i++, val++) {
ret [i] = Character.valueOf(val);
}
return ret;
}
//-------------------------------------
static Short [] createShorts ()
{
int len = SHORT_UPPER_BOUND - SHORT_LOWER_BOUND + 1;
Short [] ret = new Short [len];
short val = (short) SHORT_LOWER_BOUND;
for (int i = 0; i < len; i++, val++) {
ret [i] = Short.valueOf(val);
}
return ret;
}
//-------------------------------------
static Integer [] createIntegers ()
{
int len = INTEGER_UPPER_BOUND - INTEGER_LOWER_BOUND + 1;
Integer [] ret = new Integer [len];
int val = (int) INTEGER_LOWER_BOUND;
for (int i = 0; i < len; i++, val++) {
ret [i] = Integer.valueOf(val);
}
return ret;
}
//-------------------------------------
static Long [] createLongs ()
{
int len = LONG_UPPER_BOUND - LONG_LOWER_BOUND + 1;
Long [] ret = new Long [len];
long val = (long) LONG_LOWER_BOUND;
for (int i = 0; i < len; i++, val++) {
ret [i] = Long.valueOf(val);
}
return ret;
}
//-------------------------------------
}