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Forgot to check in support functions for yet ANOTHER way that Excel handles strings (makes 3-4th way)

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git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@352638 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andrew C. Oliver 2002-05-19 17:54:07 +00:00
parent eef90ca3f3
commit 13935d307f
1 changed files with 214 additions and 166 deletions
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234
src/java/org/apache/poi/util/StringUtil.java
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@ -1,5 +1,6 @@
/* ====================================================================
/*
* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
@ -52,7 +53,6 @@
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.poi.util;
import java.io.UnsupportedEncodingException;
@ -61,114 +61,148 @@ import java.text.NumberFormat;
import java.text.FieldPosition;
/**
* Title: String Utility
* Description: Collection of string handling utilities
* Title: String Utility Description: Collection of string handling utilities
*
*@author Andrew C. Oliver
*@created May 10, 2002
*@version 1.0
*/
public class StringUtil
{
private StringUtil()
{
}
public class StringUtil {
/**
* Constructor for the StringUtil object
*/
private StringUtil() { }
/**
* given a byte array of 16-bit unicode characters, compress to
* 8-bit and return a string
* given a byte array of 16-bit unicode characters, compress to 8-bit and
* return a string
*
*@param string the byte array to be converted
* @param offset the initial offset into the byte array. it is
* assumed that string[ offset ] and string[ offset
* + 1 ] contain the first 16-bit unicode character
* @len the length of the final string
*
*@param offset the initial offset into the
* byte array. it is assumed that string[ offset ] and string[ offset +
* 1 ] contain the first 16-bit unicode character
*@param len
*@return the converted string
*
* @exception ArrayIndexOutOfBoundsException if offset is out of
* bounds for the byte array (i.e., is negative or is
* greater than or equal to string.length)
*@exception ArrayIndexOutOfBoundsException if offset is out of bounds for
* the byte array (i.e., is negative or is greater than or equal to
* string.length)
*@exception IllegalArgumentException if len is too large (i.e.,
* there is not enough data in string to create a
* String of that length)
* there is not enough data in string to create a String of that
* length)
*@len the length of the final string
*/
public static String getFromUnicode(final byte [] string,
public static String getFromUnicodeHigh(final byte[] string,
final int offset, final int len)
throws ArrayIndexOutOfBoundsException, IllegalArgumentException
{
if ((offset < 0) || (offset >= string.length))
{
throws ArrayIndexOutOfBoundsException, IllegalArgumentException {
if ((offset < 0) || (offset >= string.length)) {
throw new ArrayIndexOutOfBoundsException("Illegal offset");
}
if ((len < 0) || (((string.length - offset) / 2) < len))
{
if ((len < 0) || (((string.length - offset) / 2) < len)) {
throw new IllegalArgumentException("Illegal length");
}
byte[] bstring = new byte[len];
int index = offset + 1; // start with low bits.
int index = offset;
// start with high bits.
for (int k = 0; k < len; k++)
{
for (int k = 0; k < len; k++) {
bstring[k] = string[index];
index += 2;
}
return new String(bstring);
}
/**
* given a byte array of 16-bit unicode characters, compress to
* 8-bit and return a string
* given a byte array of 16-bit unicode characters, compress to 8-bit and
* return a string
*
*@param string the byte array to be converted
*@param offset the initial offset into the
* byte array. it is assumed that string[ offset ] and string[ offset +
* 1 ] contain the first 16-bit unicode character
*@param len
*@return the converted string
*@exception ArrayIndexOutOfBoundsException if offset is out of bounds for
* the byte array (i.e., is negative or is greater than or equal to
* string.length)
*@exception IllegalArgumentException if len is too large (i.e.,
* there is not enough data in string to create a String of that
* length)
*@len the length of the final string
*/
public static String getFromUnicode(final byte[] string,
final int offset, final int len)
throws ArrayIndexOutOfBoundsException, IllegalArgumentException {
if ((offset < 0) || (offset >= string.length)) {
throw new ArrayIndexOutOfBoundsException("Illegal offset");
}
if ((len < 0) || (((string.length - offset) / 2) < len)) {
throw new IllegalArgumentException("Illegal length");
}
byte[] bstring = new byte[len];
int index = offset + 1;
// start with low bits.
for (int k = 0; k < len; k++) {
bstring[k] = string[index];
index += 2;
}
return new String(bstring);
}
/**
* given a byte array of 16-bit unicode characters, compress to 8-bit and
* return a string
*
*@param string the byte array to be converted
*@return the converted string
*/
public static String getFromUnicode(final byte [] string)
{
public static String getFromUnicode(final byte[] string) {
return getFromUnicode(string, 0, string.length / 2);
}
/**
* write compressed unicode
*
*@param input the String containing the data to be written
*@param output the byte array to which the data is to be written
* @param offset an offset into the byte arrat at which the data
* is start when written
*@param offset an offset into the byte arrat at which the data is start
* when written
*/
public static void putCompressedUnicode(final String input,
final byte[] output,
final int offset)
{
final int offset) {
int strlen = input.length();
for (int k = 0; k < strlen; k++)
{
for (int k = 0; k < strlen; k++) {
output[offset + k] = (byte) input.charAt(k);
}
}
/**
* Write uncompressed unicode
*
* @param input the String containing the unicode data to be
* written
*@param input the String containing the unicode data to be written
*@param output the byte array to hold the uncompressed unicode
*@param offset the offset to start writing into the byte array
*/
public static void putUncompressedUnicode(final String input,
final byte[] output,
final int offset)
{
final int offset) {
int strlen = input.length();
for (int k = 0; k < strlen; k++)
{
for (int k = 0; k < strlen; k++) {
char c = input.charAt(k);
output[offset + (2 * k)] = (byte) c;
@ -176,42 +210,59 @@ public class StringUtil
}
}
public static String format(String message, Object [] params)
{
/**
* Write uncompressed unicode
*
*@param input the String containing the unicode data to be written
*@param output the byte array to hold the uncompressed unicode
*@param offset the offset to start writing into the byte array
*/
public static void putUncompressedUnicodeHigh(final String input,
final byte[] output,
final int offset) {
int strlen = input.length();
for (int k = 0; k < strlen; k++) {
char c = input.charAt(k);
output[offset + (2 * k)] = (byte) (c >> 8);
output[offset + (2 * k)] = (byte) c;
}
}
/**
* Description of the Method
*
*@param message Description of the Parameter
*@param params Description of the Parameter
*@return Description of the Return Value
*/
public static String format(String message, Object[] params) {
int currentParamNumber = 0;
StringBuffer formattedMessage = new StringBuffer();
for (int i = 0; i < message.length(); i++)
{
if (message.charAt(i) == '%')
{
if (currentParamNumber >= params.length)
{
for (int i = 0; i < message.length(); i++) {
if (message.charAt(i) == '%') {
if (currentParamNumber >= params.length) {
formattedMessage.append("?missing data?");
}
else if ((params[ currentParamNumber ] instanceof Number)
&& (i + 1 < message.length()))
{
} else if ((params[currentParamNumber] instanceof Number)
&& (i + 1 < message.length())) {
i += matchOptionalFormatting(
(Number) params[currentParamNumber++],
message.substring(i + 1), formattedMessage);
} else {
formattedMessage.append(params[currentParamNumber++].toString());
}
else
{
formattedMessage
.append(params[ currentParamNumber++ ].toString());
}
}
else
{
} else {
if ((message.charAt(i) == '\\') && (i + 1 < message.length())
&& (message.charAt(i + 1) == '%'))
{
&& (message.charAt(i + 1) == '%')) {
formattedMessage.append('%');
i++;
}
else
{
} else {
formattedMessage.append(message.charAt(i));
}
}
@ -219,38 +270,35 @@ public class StringUtil
return formattedMessage.toString();
}
/**
* Description of the Method
*
*@param number Description of the Parameter
*@param formatting Description of the Parameter
*@param outputTo Description of the Parameter
*@return Description of the Return Value
*/
private static int matchOptionalFormatting(Number number,
String formatting,
StringBuffer outputTo)
{
StringBuffer outputTo) {
NumberFormat numberFormat = NumberFormat.getInstance();
if ((0 < formatting.length())
&& Character.isDigit(formatting.charAt(0)))
{
numberFormat
.setMinimumIntegerDigits(Integer
.parseInt(formatting.charAt(0) + ""));
&& Character.isDigit(formatting.charAt(0))) {
numberFormat.setMinimumIntegerDigits(Integer.parseInt(formatting.charAt(0) + ""));
if ((2 < formatting.length()) && (formatting.charAt(1) == '.')
&& Character.isDigit(formatting.charAt(2)))
{
numberFormat
.setMaximumFractionDigits(Integer
.parseInt(formatting.charAt(2) + ""));
&& Character.isDigit(formatting.charAt(2))) {
numberFormat.setMaximumFractionDigits(Integer.parseInt(formatting.charAt(2) + ""));
numberFormat.format(number, outputTo, new FieldPosition(0));
return 3;
}
numberFormat.format(number, outputTo, new FieldPosition(0));
return 1;
}
else if ((0 < formatting.length()) && (formatting.charAt(0) == '.'))
{
} else if ((0 < formatting.length()) && (formatting.charAt(0) == '.')) {
if ((1 < formatting.length())
&& Character.isDigit(formatting.charAt(1)))
{
numberFormat
.setMaximumFractionDigits(Integer
.parseInt(formatting.charAt(1) + ""));
&& Character.isDigit(formatting.charAt(1))) {
numberFormat.setMaximumFractionDigits(Integer.parseInt(formatting.charAt(1) + ""));
numberFormat.format(number, outputTo, new FieldPosition(0));
return 2;
}