mirror of git://gcc.gnu.org/git/gcc.git
				
				
				
			
		
			
				
	
	
		
			823 lines
		
	
	
		
			28 KiB
		
	
	
	
		
			Java
		
	
	
	
			
		
		
	
	
			823 lines
		
	
	
		
			28 KiB
		
	
	
	
		
			Java
		
	
	
	
| /* Properties.java -- a set of persistent properties
 | |
|    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005  Free Software Foundation, Inc.
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| 
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| This file is part of GNU Classpath.
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| 
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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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| 
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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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| 
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| You should have received a copy of the GNU General Public License
 | |
| along with GNU Classpath; see the file COPYING.  If not, write to the
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| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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| 02110-1301 USA.
 | |
| 
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| Linking this library statically or dynamically with other modules is
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| making a combined work based on this library.  Thus, the terms and
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| conditions of the GNU General Public License cover the whole
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| combination.
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| 
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| As a special exception, the copyright holders of this library give you
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| permission to link this library with independent modules to produce an
 | |
| executable, regardless of the license terms of these independent
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| modules, and to copy and distribute the resulting executable under
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| terms of your choice, provided that you also meet, for each linked
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| independent module, the terms and conditions of the license of that
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| module.  An independent module is a module which is not derived from
 | |
| or based on this library.  If you modify this library, you may extend
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| this exception to your version of the library, but you are not
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| obligated to do so.  If you do not wish to do so, delete this
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| exception statement from your version. */
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| 
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| 
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| package java.util;
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| 
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| import gnu.java.lang.CPStringBuilder;
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| 
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| import java.io.BufferedReader;
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| import java.io.IOException;
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| import java.io.InputStream;
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| import java.io.InputStreamReader;
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| import java.io.OutputStream;
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| import java.io.OutputStreamWriter;
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| import java.io.PrintStream;
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| import java.io.PrintWriter;
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| import java.io.Reader;
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| 
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| import javax.xml.stream.XMLInputFactory;
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| import javax.xml.stream.XMLStreamConstants;
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| import javax.xml.stream.XMLStreamException;
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| import javax.xml.stream.XMLStreamReader;
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| 
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| import org.w3c.dom.Document;
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| import org.w3c.dom.DocumentType;
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| import org.w3c.dom.DOMImplementation;
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| import org.w3c.dom.Element;
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| import org.w3c.dom.bootstrap.DOMImplementationRegistry;
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| import org.w3c.dom.ls.DOMImplementationLS;
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| import org.w3c.dom.ls.LSOutput;
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| import org.w3c.dom.ls.LSSerializer;
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| 
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| /**
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|  * A set of persistent properties, which can be saved or loaded from a stream.
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|  * A property list may also contain defaults, searched if the main list
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|  * does not contain a property for a given key.
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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 umlaut)
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|  *
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|  *
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| <pre>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</pre>
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|  *
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|  * <p>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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|  * Properties are saved in ISO 8859-1 encoding, using Unicode escapes with
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|  * a single <code>u</code> for any character which cannot be represented.
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|  *
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|  * @author Jochen Hoenicke
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|  * @author Eric Blake (ebb9@email.byu.edu)
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|  * @see PropertyResourceBundle
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|  * @status updated to 1.4
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|  */
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| public class Properties extends Hashtable<Object, Object>
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| {
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|   // WARNING: Properties is a CORE class in the bootstrap cycle. See the
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|   // comments in vm/reference/java/lang/Runtime for implications of this fact.
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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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|    * @serial the default properties
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|    */
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|   protected Properties defaults;
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| 
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|   /**
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|    * Compatible with JDK 1.0+.
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|    */
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|   private static final long serialVersionUID = 4112578634029874840L;
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| 
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|   /**
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|    * Creates a new empty property list with no default values.
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|    */
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|   public Properties()
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|   {
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|   }
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| 
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|   /**
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|    * Create a new empty property list with the specified default values.
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|    *
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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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|   /**
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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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|    *
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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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|    * @see #getProperty(String)
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|    * @since 1.2
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|    */
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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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| 
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|   /**
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|    * Reads a property list from a character 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>\\u</code><em>xxxx</em> notation are detected, and
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|    * converted to the corresponding single character. <br>
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|    *
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|    *
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| <pre># 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:\\u0020</pre>
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|    *
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|    * @param inReader the input {@link java.io.Reader}.
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|    * @throws IOException if an error occurred when reading the input
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|    * @throws NullPointerException if in is null
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|    * @since 1.6
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|    */
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|   public void load(Reader inReader) throws IOException
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|   {
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|     BufferedReader reader = new BufferedReader(inReader);
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|     String line;
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| 
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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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|         // Leading whitespaces must be deleted first.
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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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|         // If empty line or begins with a comment character, skip this line.
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|         if ((line.length() - pos) == 0
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|             || line.charAt(pos) == '#' || line.charAt(pos) == '!')
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|           continue;
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| 
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|         // The characters up to the next Whitespace, ':', or '='
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|         // describe the key.  But look for escape sequences.
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|         // Try to short-circuit when there is no escape char.
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|         int start = pos;
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|         boolean needsEscape = line.indexOf('\\', pos) != -1;
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|         CPStringBuilder key = needsEscape ? new CPStringBuilder() : null;
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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 (needsEscape && 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.  If there
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|                     // is no next line, just treat it as a key with an
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|                     // empty value.
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|                     line = reader.readLine();
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|                     if (line == null)
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|                       line = "";
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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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|                             pos += 4;
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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 if (needsEscape)
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|               key.append(c);
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|           }
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| 
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|         boolean isDelim = (c == ':' || c == '=');
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| 
 | |
|         String keyString;
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|         if (needsEscape)
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|           keyString = key.toString();
 | |
|         else if (isDelim || Character.isWhitespace(c))
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|           keyString = line.substring(start, pos - 1);
 | |
|         else
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|           keyString = line.substring(start, pos);
 | |
| 
 | |
|         while (pos < line.length()
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|                && Character.isWhitespace(c = line.charAt(pos)))
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|           pos++;
 | |
| 
 | |
|         if (! isDelim && (c == ':' || c == '='))
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|           {
 | |
|             pos++;
 | |
|             while (pos < line.length()
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|                    && Character.isWhitespace(c = line.charAt(pos)))
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|               pos++;
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|           }
 | |
| 
 | |
|         // Short-circuit if no escape chars found.
 | |
|         if (!needsEscape)
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|           {
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|             put(keyString, line.substring(pos));
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|             continue;
 | |
|           }
 | |
| 
 | |
|         // Escape char found so iterate through the rest of the line.
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|         StringBuilder element = new StringBuilder(line.length() - pos);
 | |
|         while (pos < line.length())
 | |
|           {
 | |
|             c = line.charAt(pos++);
 | |
|             if (c == '\\')
 | |
|               {
 | |
|                 if (pos == line.length())
 | |
|                   {
 | |
|                     // The line continues on the next line.
 | |
|                     line = reader.readLine();
 | |
| 
 | |
|                     // We might have seen a backslash at the end of
 | |
|                     // the file.  The JDK ignores the backslash in
 | |
|                     // this case, so we follow for compatibility.
 | |
|                     if (line == null)
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|                       break;
 | |
| 
 | |
|                     pos = 0;
 | |
|                     while (pos < line.length()
 | |
|                            && Character.isWhitespace(c = line.charAt(pos)))
 | |
|                       pos++;
 | |
|                     element.ensureCapacity(line.length() - pos +
 | |
|                                            element.length());
 | |
|                   }
 | |
|                 else
 | |
|                   {
 | |
|                     c = line.charAt(pos++);
 | |
|                     switch (c)
 | |
|                       {
 | |
|                       case 'n':
 | |
|                         element.append('\n');
 | |
|                         break;
 | |
|                       case 't':
 | |
|                         element.append('\t');
 | |
|                         break;
 | |
|                       case 'r':
 | |
|                         element.append('\r');
 | |
|                         break;
 | |
|                       case 'u':
 | |
|                         if (pos + 4 <= line.length())
 | |
|                           {
 | |
|                             char uni = (char) Integer.parseInt
 | |
|                               (line.substring(pos, pos + 4), 16);
 | |
|                             element.append(uni);
 | |
|                             pos += 4;
 | |
|                           }        // else throw exception?
 | |
|                         break;
 | |
|                       default:
 | |
|                         element.append(c);
 | |
|                         break;
 | |
|                       }
 | |
|                   }
 | |
|               }
 | |
|             else
 | |
|               element.append(c);
 | |
|           }
 | |
|         put(keyString, element.toString());
 | |
|       }
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Reads a property list from the supplied input stream.
 | |
|    * This method has the same functionality as {@link #load(Reader)}
 | |
|    * but the character encoding is assumed to be ISO-8859-1.
 | |
|    * Unicode characters not within the Latin1 set supplied by
 | |
|    * ISO-8859-1 should be escaped using '\\uXXXX' where XXXX
 | |
|    * is the UTF-16 code unit in hexadecimal.
 | |
|    *
 | |
|    * @param inStream the byte stream to read the property list from.
 | |
|    * @throws IOException if an I/O error occurs.
 | |
|    * @see #load(Reader)
 | |
|    * @since 1.2
 | |
|    */
 | |
|   public void load(InputStream inStream) throws IOException
 | |
|   {
 | |
|     load(new InputStreamReader(inStream, "ISO-8859-1"));
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Calls <code>store(OutputStream out, String header)</code> and
 | |
|    * ignores the IOException that may be thrown.
 | |
|    *
 | |
|    * @param out the stream to write to
 | |
|    * @param header a description of the property list
 | |
|    * @throws ClassCastException if this property contains any key or
 | |
|    *         value that are not strings
 | |
|    * @deprecated use {@link #store(OutputStream, String)} instead
 | |
|    */
 | |
|   @Deprecated
 | |
|   public void save(OutputStream out, String header)
 | |
|   {
 | |
|     try
 | |
|       {
 | |
|         store(out, header);
 | |
|       }
 | |
|     catch (IOException ex)
 | |
|       {
 | |
|       }
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Writes the key/value pairs to the given output stream, in a format
 | |
|    * suitable for <code>load</code>.<br>
 | |
|    *
 | |
|    * If header is not null, this method writes a comment containing
 | |
|    * the header as first line to the stream.  The next line (or first
 | |
|    * line if header is null) contains a comment with the current date.
 | |
|    * Afterwards the key/value pairs are written to the stream in the
 | |
|    * following format.<br>
 | |
|    *
 | |
|    * Each line has the form <code>key = value</code>.  Newlines,
 | |
|    * Returns and tabs are written as <code>\n,\t,\r</code> resp.
 | |
|    * The characters <code>\, !, #, =</code> and <code>:</code> are
 | |
|    * preceeded by a backslash.  Spaces are preceded with a backslash,
 | |
|    * if and only if they are at the beginning of the key.  Characters
 | |
|    * that are not in the ascii range 33 to 127 are written in the
 | |
|    * <code>\</code><code>u</code>xxxx Form.<br>
 | |
|    *
 | |
|    * Following the listing, the output stream is flushed but left open.
 | |
|    *
 | |
|    * @param out the output stream
 | |
|    * @param header the header written in the first line, may be null
 | |
|    * @throws ClassCastException if this property contains any key or
 | |
|    *         value that isn't a string
 | |
|    * @throws IOException if writing to the stream fails
 | |
|    * @throws NullPointerException if out is null
 | |
|    * @since 1.2
 | |
|    */
 | |
|   public void store(OutputStream out, String header) throws IOException
 | |
|   {
 | |
|     // The spec says that the file must be encoded using ISO-8859-1.
 | |
|     PrintWriter writer
 | |
|       = new PrintWriter(new OutputStreamWriter(out, "ISO-8859-1"));
 | |
|     if (header != null)
 | |
|       writer.println("#" + header);
 | |
|     writer.println ("#" + Calendar.getInstance ().getTime ());
 | |
| 
 | |
|     Iterator iter = entrySet ().iterator ();
 | |
|     int i = size ();
 | |
|     CPStringBuilder s = new CPStringBuilder (); // Reuse the same buffer.
 | |
|     while (--i >= 0)
 | |
|       {
 | |
|         Map.Entry entry = (Map.Entry) iter.next ();
 | |
|         formatForOutput ((String) entry.getKey (), s, true);
 | |
|         s.append ('=');
 | |
|         formatForOutput ((String) entry.getValue (), s, false);
 | |
|         writer.println (s);
 | |
|       }
 | |
| 
 | |
|     writer.flush ();
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Gets the property with the specified key in this property list.
 | |
|    * If the key is not found, the default property list is searched.
 | |
|    * If the property is not found in the default, null is returned.
 | |
|    *
 | |
|    * @param key The key for this property
 | |
|    * @return the value for the given key, or null if not found
 | |
|    * @throws ClassCastException if this property contains any key or
 | |
|    *         value that isn't a string
 | |
|    * @see #defaults
 | |
|    * @see #setProperty(String, String)
 | |
|    * @see #getProperty(String, String)
 | |
|    */
 | |
|   public String getProperty(String key)
 | |
|   {
 | |
|     Properties prop = this;
 | |
|     // Eliminate tail recursion.
 | |
|     do
 | |
|       {
 | |
|         String value = (String) prop.get(key);
 | |
|         if (value != null)
 | |
|           return value;
 | |
|         prop = prop.defaults;
 | |
|       }
 | |
|     while (prop != null);
 | |
|     return null;
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Gets the property with the specified key in this property list.  If
 | |
|    * the key is not found, the default property list is searched.  If the
 | |
|    * property is not found in the default, the specified defaultValue is
 | |
|    * returned.
 | |
|    *
 | |
|    * @param key The key for this property
 | |
|    * @param defaultValue A default value
 | |
|    * @return The value for the given key
 | |
|    * @throws ClassCastException if this property contains any key or
 | |
|    *         value that isn't a string
 | |
|    * @see #defaults
 | |
|    * @see #setProperty(String, String)
 | |
|    */
 | |
|   public String getProperty(String key, String defaultValue)
 | |
|   {
 | |
|     String prop = getProperty(key);
 | |
|     if (prop == null)
 | |
|       prop = defaultValue;
 | |
|     return prop;
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Returns an enumeration of all keys in this property list, including
 | |
|    * the keys in the default property list.
 | |
|    *
 | |
|    * @return an Enumeration of all defined keys
 | |
|    */
 | |
|   public Enumeration<?> propertyNames()
 | |
|   {
 | |
|     // We make a new Set that holds all the keys, then return an enumeration
 | |
|     // for that. This prevents modifications from ruining the enumeration,
 | |
|     // as well as ignoring duplicates.
 | |
|     Properties prop = this;
 | |
|     Set s = new HashSet();
 | |
|     // Eliminate tail recursion.
 | |
|     do
 | |
|       {
 | |
|         s.addAll(prop.keySet());
 | |
|         prop = prop.defaults;
 | |
|       }
 | |
|     while (prop != null);
 | |
|     return Collections.enumeration(s);
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Prints the key/value pairs to the given print stream.  This is
 | |
|    * mainly useful for debugging purposes.
 | |
|    *
 | |
|    * @param out the print stream, where the key/value pairs are written to
 | |
|    * @throws ClassCastException if this property contains a key or a
 | |
|    *         value that isn't a string
 | |
|    * @see #list(PrintWriter)
 | |
|    */
 | |
|   public void list(PrintStream out)
 | |
|   {
 | |
|     PrintWriter writer = new PrintWriter (out);
 | |
|     list (writer);
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Prints the key/value pairs to the given print writer.  This is
 | |
|    * mainly useful for debugging purposes.
 | |
|    *
 | |
|    * @param out the print writer where the key/value pairs are written to
 | |
|    * @throws ClassCastException if this property contains a key or a
 | |
|    *         value that isn't a string
 | |
|    * @see #list(PrintStream)
 | |
|    * @since 1.1
 | |
|    */
 | |
|   public void list(PrintWriter out)
 | |
|   {
 | |
|     out.println ("-- listing properties --");
 | |
| 
 | |
|     Iterator iter = entrySet ().iterator ();
 | |
|     int i = size ();
 | |
|     while (--i >= 0)
 | |
|       {
 | |
|         Map.Entry entry = (Map.Entry) iter.next ();
 | |
|         out.print ((String) entry.getKey () + "=");
 | |
| 
 | |
|         // JDK 1.3/1.4 restrict the printed value, but not the key,
 | |
|         // to 40 characters, including the truncating ellipsis.
 | |
|         String s = (String ) entry.getValue ();
 | |
|         if (s != null && s.length () > 40)
 | |
|           out.println (s.substring (0, 37) + "...");
 | |
|         else
 | |
|           out.println (s);
 | |
|       }
 | |
|     out.flush ();
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Formats a key or value for output in a properties file.
 | |
|    * See store for a description of the format.
 | |
|    *
 | |
|    * @param str the string to format
 | |
|    * @param buffer the buffer to add it to
 | |
|    * @param key true if all ' ' must be escaped for the key, false if only
 | |
|    *        leading spaces must be escaped for the value
 | |
|    * @see #store(OutputStream, String)
 | |
|    */
 | |
|   private void formatForOutput(String str, CPStringBuilder buffer, boolean key)
 | |
|   {
 | |
|     if (key)
 | |
|       {
 | |
|         buffer.setLength(0);
 | |
|         buffer.ensureCapacity(str.length());
 | |
|       }
 | |
|     else
 | |
|       buffer.ensureCapacity(buffer.length() + str.length());
 | |
|     boolean head = true;
 | |
|     int size = str.length();
 | |
|     for (int i = 0; i < size; i++)
 | |
|       {
 | |
|         char c = str.charAt(i);
 | |
|         switch (c)
 | |
|           {
 | |
|           case '\n':
 | |
|             buffer.append("\\n");
 | |
|             break;
 | |
|           case '\r':
 | |
|             buffer.append("\\r");
 | |
|             break;
 | |
|           case '\t':
 | |
|             buffer.append("\\t");
 | |
|             break;
 | |
|           case ' ':
 | |
|             buffer.append(head ? "\\ " : " ");
 | |
|             break;
 | |
|           case '\\':
 | |
|           case '!':
 | |
|           case '#':
 | |
|           case '=':
 | |
|           case ':':
 | |
|             buffer.append('\\').append(c);
 | |
|             break;
 | |
|           default:
 | |
|             if (c < ' ' || c > '~')
 | |
|               {
 | |
|                 String hex = Integer.toHexString(c);
 | |
|                 buffer.append("\\u0000".substring(0, 6 - hex.length()));
 | |
|                 buffer.append(hex);
 | |
|               }
 | |
|             else
 | |
|               buffer.append(c);
 | |
|           }
 | |
|         if (c != ' ')
 | |
|           head = key;
 | |
|       }
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * <p>
 | |
|    * Encodes the properties as an XML file using the UTF-8 encoding.
 | |
|    * The format of the XML file matches the DTD
 | |
|    * <a href="http://java.sun.com/dtd/properties.dtd">
 | |
|    * http://java.sun.com/dtd/properties.dtd</a>.
 | |
|    * </p>
 | |
|    * <p>
 | |
|    * Invoking this method provides the same behaviour as invoking
 | |
|    * <code>storeToXML(os, comment, "UTF-8")</code>.
 | |
|    * </p>
 | |
|    *
 | |
|    * @param os the stream to output to.
 | |
|    * @param comment a comment to include at the top of the XML file, or
 | |
|    *                <code>null</code> if one is not required.
 | |
|    * @throws IOException if the serialization fails.
 | |
|    * @throws NullPointerException if <code>os</code> is null.
 | |
|    * @since 1.5
 | |
|    */
 | |
|   public void storeToXML(OutputStream os, String comment)
 | |
|     throws IOException
 | |
|   {
 | |
|     storeToXML(os, comment, "UTF-8");
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * <p>
 | |
|    * Encodes the properties as an XML file using the supplied encoding.
 | |
|    * The format of the XML file matches the DTD
 | |
|    * <a href="http://java.sun.com/dtd/properties.dtd">
 | |
|    * http://java.sun.com/dtd/properties.dtd</a>.
 | |
|    * </p>
 | |
|    *
 | |
|    * @param os the stream to output to.
 | |
|    * @param comment a comment to include at the top of the XML file, or
 | |
|    *                <code>null</code> if one is not required.
 | |
|    * @param encoding the encoding to use for the XML output.
 | |
|    * @throws IOException if the serialization fails.
 | |
|    * @throws NullPointerException if <code>os</code> or <code>encoding</code>
 | |
|    *                              is null.
 | |
|    * @since 1.5
 | |
|    */
 | |
|   public void storeToXML(OutputStream os, String comment, String encoding)
 | |
|     throws IOException
 | |
|   {
 | |
|     if (os == null)
 | |
|       throw new NullPointerException("Null output stream supplied.");
 | |
|     if (encoding == null)
 | |
|       throw new NullPointerException("Null encoding supplied.");
 | |
|     try
 | |
|       {
 | |
|         DOMImplementationRegistry registry =
 | |
|           DOMImplementationRegistry.newInstance();
 | |
|         DOMImplementation domImpl = registry.getDOMImplementation("LS 3.0");
 | |
|         DocumentType doctype =
 | |
|           domImpl.createDocumentType("properties", null,
 | |
|                                      "http://java.sun.com/dtd/properties.dtd");
 | |
|         Document doc = domImpl.createDocument(null, "properties", doctype);
 | |
|         Element root = doc.getDocumentElement();
 | |
|         if (comment != null)
 | |
|           {
 | |
|             Element commentElement = doc.createElement("comment");
 | |
|             commentElement.appendChild(doc.createTextNode(comment));
 | |
|             root.appendChild(commentElement);
 | |
|           }
 | |
|         Iterator iterator = entrySet().iterator();
 | |
|         while (iterator.hasNext())
 | |
|           {
 | |
|             Map.Entry entry = (Map.Entry) iterator.next();
 | |
|             Element entryElement = doc.createElement("entry");
 | |
|             entryElement.setAttribute("key", (String) entry.getKey());
 | |
|             entryElement.appendChild(doc.createTextNode((String)
 | |
|                                                         entry.getValue()));
 | |
|             root.appendChild(entryElement);
 | |
|           }
 | |
|         DOMImplementationLS loadAndSave = (DOMImplementationLS) domImpl;
 | |
|         LSSerializer serializer = loadAndSave.createLSSerializer();
 | |
|         LSOutput output = loadAndSave.createLSOutput();
 | |
|         output.setByteStream(os);
 | |
|         output.setEncoding(encoding);
 | |
|         serializer.write(doc, output);
 | |
|       }
 | |
|     catch (ClassNotFoundException e)
 | |
|       {
 | |
|         throw (IOException)
 | |
|           new IOException("The XML classes could not be found.").initCause(e);
 | |
|       }
 | |
|     catch (InstantiationException e)
 | |
|       {
 | |
|         throw (IOException)
 | |
|           new IOException("The XML classes could not be instantiated.")
 | |
|           .initCause(e);
 | |
|       }
 | |
|     catch (IllegalAccessException e)
 | |
|       {
 | |
|         throw (IOException)
 | |
|           new IOException("The XML classes could not be accessed.")
 | |
|           .initCause(e);
 | |
|       }
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * <p>
 | |
|    * Decodes the contents of the supplied <code>InputStream</code> as
 | |
|    * an XML file, which represents a set of properties.  The format of
 | |
|    * the XML file must match the DTD
 | |
|    * <a href="http://java.sun.com/dtd/properties.dtd">
 | |
|    * http://java.sun.com/dtd/properties.dtd</a>.
 | |
|    * </p>
 | |
|    *
 | |
|    * @param in the input stream from which to receive the XML data.
 | |
|    * @throws IOException if an I/O error occurs in reading the input data.
 | |
|    * @throws InvalidPropertiesFormatException if the input data does not
 | |
|    *                                          constitute an XML properties
 | |
|    *                                          file.
 | |
|    * @throws NullPointerException if <code>in</code> is null.
 | |
|    * @since 1.5
 | |
|    */
 | |
|   public void loadFromXML(InputStream in)
 | |
|     throws IOException, InvalidPropertiesFormatException
 | |
|   {
 | |
|     if (in == null)
 | |
|       throw new NullPointerException("Null input stream supplied.");
 | |
|     try
 | |
|       {
 | |
|         XMLInputFactory factory = XMLInputFactory.newInstance();
 | |
|         // Don't resolve external entity references
 | |
|         factory.setProperty("javax.xml.stream.isSupportingExternalEntities",
 | |
|                             Boolean.FALSE);
 | |
|         XMLStreamReader reader = factory.createXMLStreamReader(in);
 | |
|         String name, key = null;
 | |
|         CPStringBuilder buf = null;
 | |
|         while (reader.hasNext())
 | |
|           {
 | |
|             switch (reader.next())
 | |
|               {
 | |
|               case XMLStreamConstants.START_ELEMENT:
 | |
|                 name = reader.getLocalName();
 | |
|                 if (buf == null && "entry".equals(name))
 | |
|                   {
 | |
|                     key = reader.getAttributeValue(null, "key");
 | |
|                     if (key == null)
 | |
|                       {
 | |
|                         String msg = "missing 'key' attribute";
 | |
|                         throw new InvalidPropertiesFormatException(msg);
 | |
|                       }
 | |
|                     buf = new CPStringBuilder();
 | |
|                   }
 | |
|                 else if (!"properties".equals(name) && !"comment".equals(name))
 | |
|                   {
 | |
|                     String msg = "unexpected element name '" + name + "'";
 | |
|                     throw new InvalidPropertiesFormatException(msg);
 | |
|                   }
 | |
|                 break;
 | |
|               case XMLStreamConstants.END_ELEMENT:
 | |
|                 name = reader.getLocalName();
 | |
|                 if (buf != null && "entry".equals(name))
 | |
|                   {
 | |
|                     put(key, buf.toString());
 | |
|                     buf = null;
 | |
|                   }
 | |
|                 else if (!"properties".equals(name) && !"comment".equals(name))
 | |
|                   {
 | |
|                     String msg = "unexpected element name '" + name + "'";
 | |
|                     throw new InvalidPropertiesFormatException(msg);
 | |
|                   }
 | |
|                 break;
 | |
|               case XMLStreamConstants.CHARACTERS:
 | |
|               case XMLStreamConstants.SPACE:
 | |
|               case XMLStreamConstants.CDATA:
 | |
|                 if (buf != null)
 | |
|                   buf.append(reader.getText());
 | |
|                 break;
 | |
|               }
 | |
|           }
 | |
|         reader.close();
 | |
|       }
 | |
|     catch (XMLStreamException e)
 | |
|       {
 | |
|         throw (InvalidPropertiesFormatException)
 | |
|           new InvalidPropertiesFormatException("Error in parsing XML.").
 | |
|           initCause(e);
 | |
|       }
 | |
|   }
 | |
| 
 | |
| } // class Properties
 |