Properties based on Hashtable : Hashtable « Collections Data Structure « C# / C Sharp
Properties based on Hashtable
/*
* $Id: StringTokenizer.cs,v 1.4 2006/06/16 10:52:26 psoares33 Exp $
*
* Copyright 2006 by Paulo Soares.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License isp distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code isp 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code isp Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code isp Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library isp free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library isp distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
using System;
using System.Text;
using System.IO;
using System.Collections;
namespace System.util
{
/// <summary>
/// Summary description for Properties.
/// </summary>
public class Properties
{
private Hashtable _col;
private const string whiteSpaceChars = " \t\r\n\f";
private const string keyValueSeparators = "=: \t\r\n\f";
private const string strictKeyValueSeparators = "=:";
public Properties()
{
_col = new Hashtable();
}
public string Remove(string key) {
string retval = (string)_col[key];
_col.Remove(key);
return retval;
}
public IEnumerator GetEnumerator() {
return _col.GetEnumerator();
}
public bool ContainsKey(string key) {
return _col.ContainsKey(key);
}
public virtual void Add(string key, string value) {
_col[key] = value;
}
public void AddAll(Properties col) {
foreach (string itm in col.Keys) {
_col[itm] = col[itm];
}
}
public int Count {
get {
return _col.Count;
}
}
public virtual string this[string key] {
get {
return (string)_col[key];
}
set {
_col[key] = value;
}
}
public ICollection Keys {
get {
return _col.Keys;
}
}
public void Clear() {
_col.Clear();
}
public void Load(Stream inStream) {
StreamReader inp = new StreamReader(inStream, Encoding.GetEncoding(1252));
while (true) {
// Get next line
String line = inp.ReadLine();
if (line == null)
return;
if (line.Length > 0) {
// Find start of key
int len = line.Length;
int keyStart;
for (keyStart=0; keyStart<len; keyStart++)
if (whiteSpaceChars.IndexOf(line[keyStart]) == -1)
break;
// Blank lines are ignored
if (keyStart == len)
continue;
// Continue lines that end in slashes if they are not comments
char firstChar = line[keyStart];
if ((firstChar != '#') && (firstChar != '!')) {
while (ContinueLine(line)) {
String nextLine = inp.ReadLine();
if (nextLine == null)
nextLine = "";
String loppedLine = line.Substring(0, len-1);
// Advance beyond whitespace on new line
int startIndex;
for (startIndex=0; startIndex<nextLine.Length; startIndex++)
if (whiteSpaceChars.IndexOf(nextLine[startIndex]) == -1)
break;
nextLine = nextLine.Substring(startIndex,nextLine.Length - startIndex);
line = loppedLine+nextLine;
len = line.Length;
}
// Find separation between key and value
int separatorIndex;
for (separatorIndex=keyStart; separatorIndex<len; separatorIndex++) {
char currentChar = line[separatorIndex];
if (currentChar == '\\')
separatorIndex++;
else if (keyValueSeparators.IndexOf(currentChar) != -1)
break;
}
// Skip over whitespace after key if any
int valueIndex;
for (valueIndex=separatorIndex; valueIndex<len; valueIndex++)
if (whiteSpaceChars.IndexOf(line[valueIndex]) == -1)
break;
// Skip over one non whitespace key value separators if any
if (valueIndex < len)
if (strictKeyValueSeparators.IndexOf(line[valueIndex]) != -1)
valueIndex++;
// Skip over white space after other separators if any
while (valueIndex < len) {
if (whiteSpaceChars.IndexOf(line[valueIndex]) == -1)
break;
valueIndex++;
}
String key = line.Substring(keyStart, separatorIndex - keyStart);
String value = (separatorIndex < len) ? line.Substring(valueIndex, len - valueIndex) : "";
// Convert then store key and value
key = LoadConvert(key);
value = LoadConvert(value);
Add(key, value);
}
}
}
}
/*
* Converts encoded \uxxxx to unicode chars
* and changes special saved chars to their original forms
*/
private String LoadConvert(String theString) {
char aChar;
int len = theString.Length;
StringBuilder outBuffer = new StringBuilder(len);
for (int x=0; x<len; ) {
aChar = theString[x++];
if (aChar == '\\') {
aChar = theString[x++];
if (aChar == 'u') {
// Read the xxxx
int value=0;
for (int i=0; i<4; i++) {
aChar = theString[x++];
switch (aChar) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
value = (value << 4) + aChar - '0';
break;
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
value = (value << 4) + 10 + aChar - 'a';
break;
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
value = (value << 4) + 10 + aChar - 'A';
break;
default:
throw new ArgumentException(
"Malformed \\uxxxx encoding.");
}
}
outBuffer.Append((char)value);
} else {
if (aChar == 't') aChar = '\t';
else if (aChar == 'r') aChar = '\r';
else if (aChar == 'n') aChar = '\n';
else if (aChar == 'f') aChar = '\f';
outBuffer.Append(aChar);
}
} else
outBuffer.Append(aChar);
}
return outBuffer.ToString();
}
private bool ContinueLine(String line) {
int slashCount = 0;
int index = line.Length - 1;
while ((index >= 0) && (line[index--] == '\\'))
slashCount++;
return (slashCount % 2 == 1);
}
}
}
