com.ibm.commons.util.Converter Maven / Gradle / Ivy
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/*
* © Copyright IBM Corp. 2012-2013
*
* 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 com.ibm.commons.util;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
import java.util.TimeZone;
/**
* Some data converter utilities.
* @ibm-api
*/
public final class Converter {
/*------------------------ General methods----------------------------------------------*/
/**
* Returns the decimal separator in this locale.
* @ibm-api
*/
public static char getDecimalSeparator(Locale loc){
return new DecimalFormatSymbols(loc).getDecimalSeparator();
}
/**
* Returns the grouping separator (to separate every 3 digits
* in integer part of a number) in this locale.
* @ibm-api
*/
public static char getGroupingSeparator(Locale loc){
return new DecimalFormatSymbols(loc).getGroupingSeparator();
}
/**
* Returns the default locale of the JVM.
* @fbscript
* @ibm-api
*/
public static Locale getJVMLocale(){
return Locale.getDefault();
}
/**
* Returns the default time zone of the JVM.
* @fbscript
* @ibm-api
*/
public static TimeZone getJVMTimeZone() {
return TimeZone.getDefault();
}
/*------------------------ Integer Conversion ------------------------------------------*/
/**
* @ibm-api
*/
public static long parseInteger(String src) {
if(StringUtil.isEmpty(src) ) {
return 0;
}
return Long.parseLong(src);
}
/**
* @ibm-api
*/
public static long parseInteger(String src, Locale loc) throws ParseException{
if (loc==null) {
loc = Locale.getDefault();
}
NumberFormat nf = NumberFormat.getNumberInstance(loc);
nf.setParseIntegerOnly(true);
return nf.parse(src).longValue();
}
/**
* @ibm-api
*/
public static String formatInteger( long l ) {
return formatInteger(l, null, null, null);
}
/**
* @ibm-api
*/
public static String formatInteger( long l, String format ) {
return formatInteger(l, format, null, null);
}
/**
* @ibm-api
*/
public static String formatInteger( long l, Locale locale ) {
return formatInteger(l, null, null, locale);
}
/**
* @ibm-api
*/
public static String formatInteger( long l, String format, String emptyFormat ) {
return formatInteger(l, format, emptyFormat, null);
}
/**
* @ibm-api
*/
public static String formatInteger( long l, String format, String emptyFormat, Locale loc ) {
if (loc==null) {
loc = Locale.getDefault();
}
if( l==0.0 && !StringUtil.isEmpty(emptyFormat) ) {
return emptyFormat;
}
NumberFormat fmt=null;
if (!StringUtil.isEmpty(format)){
fmt = new DecimalFormat(format, new DecimalFormatSymbols(loc));
} else {
fmt = NumberFormat.getNumberInstance(loc);
}
if (fmt!=null) {
return fmt.format(l);
} else {
//should never append
return Long.toString(l);
}
}
/*------------------------ Double Conversion -------------------------------------------*/
/**
* @ibm-api
*/
public static double parseDecimal(String src) {
if(StringUtil.isEmpty(src) ) {
return 0;
}
return Double.parseDouble(src);
}
/**
* @ibm-api
*/
public static double parseDecimal(String src, Locale loc) throws ParseException{
if (loc==null) {
loc = Locale.getDefault();
}
return NumberFormat.getInstance(loc).parse(src).floatValue();
}
// Getting a Decimal from a String (accept comma or point in some locales)
/**
* @ibm-api
*/
public static double parseFloatWithDecimalSeparatorTolerance(String doubleString, Locale loc) {
doubleString = removeThousandSeparator(doubleString, loc);
doubleString = replaceCommaByPoint(doubleString, loc);
return parseDecimal(doubleString);
}
/**
* If a decimal number contains a comma and no point, and if the given
* locale uses a comma for decimal separator, the comma is replaced by
* a point.
* @ibm-api
*/
public static String replaceCommaByPoint(String doubleString, Locale loc) {
DecimalFormatSymbols symb = new DecimalFormatSymbols(loc);
if (symb.getDecimalSeparator()==',') {
// comma just 1 time, and no point
if ( doubleString.indexOf(',')>=0
&& doubleString.indexOf(',')==doubleString.lastIndexOf(',')
&& doubleString.indexOf('.')==-1 ) {
return doubleString.replace(',','.');
}
}
return doubleString;
}
/**
* If a decimal number contains thousand separator (example : a coma in US),
* they are removed, so that the string can be correctly interpreted by Double.parseDouble
* @ibm-api
*/
public static String removeThousandSeparator(String doubleString, Locale loc) {
DecimalFormatSymbols symb = new DecimalFormatSymbols(loc);
char thoSep = symb.getGroupingSeparator();
if (thoSep=='.') { // don't remove thousand separator if it is a '.'
return doubleString;
}
if (thoSep==160) { // insecable white space
thoSep=' ';
}
return StringUtil.replace(doubleString, String.valueOf(thoSep), null);
}
/**
* @ibm-api
*/
public static String formatDecimal( double d ) {
return formatDecimal(d, null, null, null);
}
/**
* @ibm-api
*/
public static String formatDecimal( double d, Locale locale ) {
return formatDecimal(d, null, null, locale);
}
/**
* @ibm-api
*/
public static String formatDecimal( double d, String format ) {
return formatDecimal(d, format, null, null);
}
/**
* @ibm-api
*/
public static String formatDecimal( double d, String format, String emptyFormat ) {
return formatDecimal(d, format, emptyFormat, null);
}
/**
* @ibm-api
*/
public static String formatDecimal(double d, String format, String emptyFormat, Locale loc) {
if (loc==null) {
loc = Locale.getDefault();
}
if( d==0.0 && !StringUtil.isEmpty(emptyFormat) ) {
return emptyFormat;
}
NumberFormat fmt=null;
if (!StringUtil.isEmpty(format)){
fmt = new DecimalFormat(format, new DecimalFormatSymbols(loc));
} else {
fmt = NumberFormat.getNumberInstance(loc);
}
if (fmt!=null) {
return fmt.format(d);
} else {
//should never append
return Double.toString(d);
}
}
/*------------------------ Boolean Conversion ------------------------------------------*/
/**
* @ibm-api
*/
public static String formatBoolean(boolean value) {
return formatBoolean(value,null);
}
/**
* @ibm-api
*/
public static String formatBoolean(boolean value, Locale locale) {
return value ? "True" : "False"; // $NLS-Converter.true-1$ $NLS-Converter.false-2$
}
/**
* @ibm-api
*/
public static boolean parseBoolean(String value) {
return StringUtil.equals(value,"True"); // $NLS-Converter.true.1-1$
}
/**
* @ibm-api
*/
public static boolean parseBooleanLocale(String value) {
return parseBoolean(value);
}
/**
* @ibm-api
*/
public static boolean parseBooleanLocale(String value, Locale locale) {
return parseBoolean(value);
}
}