2000-10-08 02:13:11 +08:00
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/* java.util.Properties
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Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
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1999-04-07 22:42:40 +08:00
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2000-10-08 02:13:11 +08:00
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This file is part of GNU Classpath.
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1999-04-07 22:42:40 +08:00
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2000-10-08 02:13:11 +08:00
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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2001-03-20 07:00:18 +08:00
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2000-10-08 02:13:11 +08:00
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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1999-04-07 22:42:40 +08:00
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2000-10-08 02:13:11 +08:00
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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1999-04-07 22:42:40 +08:00
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2000-10-08 02:13:11 +08:00
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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1999-04-07 22:42:40 +08:00
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2000-10-08 02:13:11 +08:00
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package java.util;
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import java.io.*;
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2000-09-09 03:37:09 +08:00
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2000-10-08 02:13:11 +08:00
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/**
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* An example of a properties file for the german language is given
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* here. This extends the example given in ListResourceBundle.
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* Create a file MyResource_de.properties with the following contents
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* and put it in the CLASSPATH. (The character
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* <code>\</code><code>u00e4</code> is the german ä)
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*
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* <pre>
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* s1=3
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* s2=MeineDisk
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* s3=3. M\<code></code>u00e4rz 96
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* s4=Die Diskette ''{1}'' enth\<code></code>u00e4lt {0} in {2}.
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* s5=0
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* s6=keine Dateien
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* s7=1
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* s8=eine Datei
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* s9=2
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* s10={0,number} Dateien
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* s11=Das Formatieren schlug fehl mit folgender Exception: {0}
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* s12=FEHLER
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* s13=Ergebnis
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* s14=Dialog
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* s15=Auswahlkriterium
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* s16=1,3
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* </pre>
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*
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* Although this is a sub class of a hash table, you should never
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* insert anything other than strings to this property, or several
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* methods, that need string keys and values, will fail. To ensure
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* this, you should use the <code>get/setProperty</code> method instead
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* of <code>get/put</code>.
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*
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* @see PropertyResourceBundle
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* @author Jochen Hoenicke */
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2001-03-20 07:00:18 +08:00
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public class Properties extends Hashtable
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{
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/**
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* The property list that contains default values for any keys not
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* in this property list.
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*/
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protected Properties defaults;
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private static final long serialVersionUID = 4112578634029874840L;
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2000-10-08 02:13:11 +08:00
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2001-03-20 07:00:18 +08:00
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/**
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* Creates a new empty property list.
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*/
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public Properties()
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{
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this.defaults = null;
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}
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2000-10-08 02:13:11 +08:00
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2001-03-20 07:00:18 +08:00
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/**
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* Create a new empty property list with the specified default values.
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* @param defaults a Properties object containing the default values.
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*/
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public Properties(Properties defaults)
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{
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this.defaults = defaults;
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}
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/**
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* Reads a property list from an input stream. The stream should
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* have the following format: <br>
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*
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* An empty line or a line starting with <code>#</code> or
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* <code>!</code> is ignored. An backslash (<code>\</code>) at the
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* end of the line makes the line continueing on the next line
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* (but make sure there is no whitespace after the backslash).
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* Otherwise, each line describes a key/value pair. <br>
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*
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* The chars up to the first whitespace, = or : are the key. You
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* can include this caracters in the key, if you precede them with
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* a backslash (<code>\</code>). The key is followed by optional
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* whitespaces, optionally one <code>=</code> or <code>:</code>,
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* and optionally some more whitespaces. The rest of the line is
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* the resource belonging to the key. <br>
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*
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* Escape sequences <code>\t, \n, \r, \\, \", \', \!, \#, \ </code>(a
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* space), and unicode characters with the
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* <code>\</code><code>u</code>xxxx notation are detected, and
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* converted to the corresponding single character. <br>
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*
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* <pre>
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* # This is a comment
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* key = value
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* k\:5 \ a string starting with space and ending with newline\n
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* # This is a multiline specification; note that the value contains
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* # no white space.
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* weekdays: Sunday,Monday,Tuesday,Wednesday,\
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* Thursday,Friday,Saturday
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* # The safest way to include a space at the end of a value:
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* label = Name:\<code></code>u0020
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* </pre>
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*
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* @param in the input stream
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* @exception IOException if an error occured when reading
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* from the input. */
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public void load(InputStream inStream) throws IOException
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{
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BufferedReader reader =
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new BufferedReader(new InputStreamReader(inStream));
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String line;
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2000-10-08 02:13:11 +08:00
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2001-03-20 07:00:18 +08:00
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while ((line = reader.readLine()) != null)
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{
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char c = 0;
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int pos = 0;
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while (pos < line.length()
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&& Character.isWhitespace(c = line.charAt(pos)))
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pos++;
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1999-04-07 22:42:40 +08:00
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2001-03-20 07:00:18 +08:00
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// If line is empty or begins with a comment character,
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// skip this line.
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if (pos == line.length() || c == '#' || c == '!')
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continue;
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2000-10-08 02:13:11 +08:00
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2001-03-20 07:00:18 +08:00
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// The characaters up to the next Whitespace, ':', or '='
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// describe the key. But look for escape sequences.
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StringBuffer key = new StringBuffer();
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while (pos < line.length()
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&& !Character.isWhitespace(c = line.charAt(pos++))
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&& c != '=' && c != ':')
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{
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if (c == '\\')
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{
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if (pos == line.length())
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{
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// The line continues on the next line.
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line = reader.readLine();
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pos = 0;
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while (pos < line.length()
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&& Character.isWhitespace(c = line.charAt(pos)))
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pos++;
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}
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else
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{
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c = line.charAt(pos++);
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switch (c)
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{
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case 'n':
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key.append('\n');
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break;
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case 't':
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key.append('\t');
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break;
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case 'r':
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key.append('\r');
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break;
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case 'u':
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if (pos + 4 <= line.length())
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{
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char uni = (char) Integer.parseInt
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(line.substring(pos, pos + 4), 16);
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key.append(uni);
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} // else throw exception?
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break;
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default:
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key.append(c);
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break;
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}
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}
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}
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else
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key.append(c);
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}
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2000-10-08 02:13:11 +08:00
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2001-03-20 07:00:18 +08:00
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boolean isDelim = (c == ':' || c == '=');
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while (pos < line.length()
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&& Character.isWhitespace(c = line.charAt(pos)))
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pos++;
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2000-10-08 02:13:11 +08:00
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2001-03-20 07:00:18 +08:00
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if (!isDelim && (c == ':' || c == '='))
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{
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pos++;
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while (pos < line.length()
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&& Character.isWhitespace(c = line.charAt(pos)))
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pos++;
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}
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2000-10-08 02:13:11 +08:00
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2001-03-20 07:00:18 +08:00
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StringBuffer element = new StringBuffer(line.length() - pos);
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while (pos < line.length())
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{
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c = line.charAt(pos++);
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if (c == '\\')
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{
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if (pos == line.length())
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{
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// The line continues on the next line.
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line = reader.readLine();
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pos = 0;
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while (pos < line.length()
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&& Character.isWhitespace(c = line.charAt(pos)))
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pos++;
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element.ensureCapacity(line.length() - pos +
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element.length());
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}
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else
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{
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c = line.charAt(pos++);
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switch (c)
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{
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case 'n':
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element.append('\n');
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break;
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case 't':
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element.append('\t');
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break;
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case 'r':
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element.append('\r');
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break;
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case 'u':
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if (pos + 4 <= line.length())
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{
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char uni = (char) Integer.parseInt
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(line.substring(pos, pos + 4), 16);
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element.append(uni);
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} // else throw exception?
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break;
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default:
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element.append(c);
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break;
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}
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}
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}
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else
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element.append(c);
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}
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put(key.toString(), element.toString());
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}
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}
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1999-04-07 22:42:40 +08:00
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2001-03-20 07:00:18 +08:00
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/**
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* Calls <code>store(OutputStream out, String header)</code> and
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* ignores the IOException that may be thrown.
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* @deprecated use store instead.
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* @exception ClassCastException if this property contains any key or
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* value that isn't a string.
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*/
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public void save(OutputStream out, String header)
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{
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try
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{
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store(out, header);
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}
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catch (IOException ex)
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{
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}
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}
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/**
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* Writes the key/value pairs to the given output stream. <br>
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*
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* If header is not null, this method writes a comment containing
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* the header as first line to the stream. The next line (or first
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* line if header is null) contains a comment with the current date.
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* Afterwards the key/value pairs are written to the stream in the
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* following format. <br>
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*
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* Each line has the form <code>key = value</code>. Newlines,
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* Returns and tabs are written as <code>\n,\t,\r</code> resp.
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* The characters <code>\, !, #, =</code> and <code>:</code> are
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* preceeded by a backslash. Spaces are preceded with a backslash,
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* if and only if they are at the beginning of the key. Characters
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* that are not in the ascii range 33 to 127 are written in the
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* <code>\</code><code>u</code>xxxx Form.
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*
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* @param out the output stream
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* @param header the header written in the first line, may be null.
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* @exception ClassCastException if this property contains any key or
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* value that isn't a string.
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*/
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public void store(OutputStream out, String header) throws IOException
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{
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PrintWriter writer = new PrintWriter(out);
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if (header != null)
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writer.println("#" + header);
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writer.println("#" + new Date().toString());
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list(writer);
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writer.flush();
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}
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/**
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* Adds the given key/value pair to this properties. This calls
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* the hashtable method put.
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* @param key the key for this property
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* @param value the value for this property
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* @return The old value for the given key.
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* @since JDK1.2 */
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public Object setProperty(String key, String value)
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{
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return put(key, value);
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}
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1999-04-07 22:42:40 +08:00
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2001-03-20 07:00:18 +08:00
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/**
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* Gets the property with the specified key in this property list.
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* If the key is not found, the default property list is searched.
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* If the property is not found in default or the default of
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* default, null is returned.
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* @param key The key for this property.
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* @param defaulValue A default value
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* @return The value for the given key, or null if not found.
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* @exception ClassCastException if this property contains any key or
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* value that isn't a string.
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*/
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public String getProperty(String key)
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{
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return getProperty(key, null);
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}
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1999-04-07 22:42:40 +08:00
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2001-03-20 07:00:18 +08:00
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/**
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* Gets the property with the specified key in this property list. If
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* the key is not found, the default property list is searched. If the
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* property is not found in default or the default of default, the
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* specified defaultValue is returned.
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* @param key The key for this property.
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* @param defaulValue A default value
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* @return The value for the given key.
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* @exception ClassCastException if this property contains any key or
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* value that isn't a string.
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*/
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public String getProperty(String key, String defaultValue)
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{
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Properties prop = this;
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// Eliminate tail recursion.
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do
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{
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String value = (String) prop.get(key);
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if (value != null)
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|
return value;
|
|
|
|
prop = prop.defaults;
|
|
|
|
}
|
|
|
|
while (prop != null);
|
|
|
|
return defaultValue;
|
|
|
|
}
|
1999-04-07 22:42:40 +08:00
|
|
|
|
2001-03-20 07:00:18 +08:00
|
|
|
private final void addHashEntries(Hashtable base)
|
|
|
|
{
|
|
|
|
if (defaults != null)
|
|
|
|
defaults.addHashEntries(base);
|
|
|
|
Enumeration keys = keys();
|
|
|
|
while (keys.hasMoreElements())
|
|
|
|
base.put(keys.nextElement(), base);
|
|
|
|
}
|
1999-04-07 22:42:40 +08:00
|
|
|
|
2001-03-20 07:00:18 +08:00
|
|
|
/**
|
|
|
|
* Returns an enumeration of all keys in this property list, including
|
|
|
|
* the keys in the default property list.
|
|
|
|
*/
|
|
|
|
public Enumeration propertyNames()
|
|
|
|
{
|
|
|
|
// We make a new Hashtable that holds all the keys. Then we
|
|
|
|
// return an enumeration for this hash. We do this because we
|
|
|
|
// don't want modifications to be reflected in the enumeration
|
|
|
|
// (per JCL), and because there doesn't seem to be a
|
|
|
|
// particularly better way to ensure that duplicates are
|
|
|
|
// ignored.
|
|
|
|
Hashtable t = new Hashtable();
|
|
|
|
addHashEntries(t);
|
|
|
|
return t.keys();
|
|
|
|
}
|
1999-04-07 22:42:40 +08:00
|
|
|
|
2001-03-20 07:00:18 +08:00
|
|
|
/**
|
|
|
|
* Formats a key/value pair for output in a properties file.
|
|
|
|
* See store for a description of the format.
|
|
|
|
* @param key the key.
|
|
|
|
* @param value the value.
|
|
|
|
* @see #store
|
|
|
|
*/
|
|
|
|
private String formatForOutput(String key, String value)
|
|
|
|
{
|
|
|
|
// This is a simple approximation of the expected line size.
|
|
|
|
StringBuffer result =
|
|
|
|
new StringBuffer(key.length() + value.length() + 16);
|
|
|
|
boolean head = true;
|
|
|
|
for (int i = 0; i < key.length(); i++)
|
|
|
|
{
|
|
|
|
char c = key.charAt(i);
|
|
|
|
switch (c)
|
|
|
|
{
|
|
|
|
case '\n':
|
|
|
|
result.append("\\n");
|
|
|
|
break;
|
|
|
|
case '\r':
|
|
|
|
result.append("\\r");
|
|
|
|
break;
|
|
|
|
case '\t':
|
|
|
|
result.append("\\t");
|
|
|
|
break;
|
|
|
|
case '\\':
|
|
|
|
result.append("\\\\");
|
|
|
|
break;
|
|
|
|
case '!':
|
|
|
|
result.append("\\!");
|
|
|
|
break;
|
|
|
|
case '#':
|
|
|
|
result.append("\\#");
|
|
|
|
break;
|
|
|
|
case '=':
|
|
|
|
result.append("\\=");
|
|
|
|
break;
|
|
|
|
case ':':
|
|
|
|
result.append("\\:");
|
|
|
|
break;
|
|
|
|
case ' ':
|
|
|
|
result.append("\\ ");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
if (c < 32 || c > '~')
|
|
|
|
{
|
|
|
|
String hex = Integer.toHexString(c);
|
|
|
|
result.append("\\u0000".substring(0, 6 - hex.length()));
|
|
|
|
result.append(hex);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
result.append(c);
|
|
|
|
}
|
|
|
|
if (c != 32)
|
|
|
|
head = false;
|
|
|
|
}
|
|
|
|
result.append('=');
|
|
|
|
head = true;
|
|
|
|
for (int i = 0; i < value.length(); i++)
|
|
|
|
{
|
|
|
|
char c = value.charAt(i);
|
|
|
|
switch (c)
|
|
|
|
{
|
|
|
|
case '\n':
|
|
|
|
result.append("\\n");
|
|
|
|
break;
|
|
|
|
case '\r':
|
|
|
|
result.append("\\r");
|
|
|
|
break;
|
|
|
|
case '\t':
|
|
|
|
result.append("\\t");
|
|
|
|
break;
|
|
|
|
case '\\':
|
|
|
|
result.append("\\\\");
|
|
|
|
break;
|
|
|
|
case '!':
|
|
|
|
result.append("\\!");
|
|
|
|
break;
|
|
|
|
case '#':
|
|
|
|
result.append("\\#");
|
|
|
|
break;
|
|
|
|
case ' ':
|
|
|
|
result.append(head ? "\\ " : " ");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
if (c < 32 || c > '~')
|
|
|
|
{
|
|
|
|
String hex = Integer.toHexString(c);
|
|
|
|
result.append("\\u0000".substring(0, 6 - hex.length()));
|
|
|
|
result.append(hex);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
result.append(c);
|
|
|
|
}
|
|
|
|
if (c != 32)
|
|
|
|
head = false;
|
|
|
|
}
|
|
|
|
return result.toString();
|
|
|
|
}
|
1999-04-07 22:42:40 +08:00
|
|
|
|
2001-03-20 07:00:18 +08:00
|
|
|
/**
|
|
|
|
* Writes the key/value pairs to the given print stream. They are
|
|
|
|
* written in the way, described in the method store.
|
|
|
|
* @param out the stream, where the key/value pairs are written to.
|
|
|
|
* @exception ClassCastException if this property contains any key or
|
|
|
|
* value that isn't a string.
|
|
|
|
* @see #store
|
|
|
|
*/
|
|
|
|
public void list(PrintStream out)
|
|
|
|
{
|
|
|
|
Enumeration keys = keys();
|
|
|
|
Enumeration elts = elements();
|
|
|
|
while (keys.hasMoreElements())
|
|
|
|
{
|
|
|
|
String key = (String) keys.nextElement();
|
|
|
|
String elt = (String) elts.nextElement();
|
|
|
|
String output = formatForOutput(key, elt);
|
|
|
|
out.println(output);
|
|
|
|
}
|
|
|
|
}
|
2000-02-09 05:30:45 +08:00
|
|
|
|
2001-03-20 07:00:18 +08:00
|
|
|
/**
|
|
|
|
* Writes the key/value pairs to the given print writer. They are
|
|
|
|
* written in the way, described in the method store.
|
|
|
|
* @param out the writer, where the key/value pairs are written to.
|
|
|
|
* @exception ClassCastException if this property contains any key or
|
|
|
|
* value that isn't a string.
|
|
|
|
* @see #store
|
|
|
|
* @see #list(java.io.PrintStream)
|
|
|
|
* @since JDK1.1
|
|
|
|
*/
|
|
|
|
public void list(PrintWriter out)
|
|
|
|
{
|
|
|
|
Enumeration keys = keys();
|
|
|
|
Enumeration elts = elements();
|
|
|
|
while (keys.hasMoreElements())
|
|
|
|
{
|
|
|
|
String key = (String) keys.nextElement();
|
|
|
|
String elt = (String) elts.nextElement();
|
|
|
|
String output = formatForOutput(key, elt);
|
|
|
|
out.println(output);
|
|
|
|
}
|
|
|
|
}
|
1999-04-07 22:42:40 +08:00
|
|
|
}
|