Source for javax.swing.text.SimpleAttributeSet

   1: /* SimpleAttributeSet.java --
   2:    Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package javax.swing.text;
  40: 
  41: import java.io.Serializable;
  42: import java.util.Enumeration;
  43: import java.util.Hashtable;
  44: 
  45: public class SimpleAttributeSet
  46:   implements MutableAttributeSet, Serializable, Cloneable
  47: {
  48:   public static final AttributeSet EMPTY = new SimpleAttributeSet();
  49: 
  50:   Hashtable tab;
  51: 
  52:   public SimpleAttributeSet()
  53:   {
  54:     this(null);
  55:   }
  56:   
  57:   public SimpleAttributeSet(AttributeSet a)
  58:   {
  59:     tab = new Hashtable();
  60:     if (a != null)
  61:       addAttributes(a);
  62:   }
  63: 
  64:   public void addAttribute(Object name, Object value)
  65:   {
  66:     tab.put(name, value);
  67:   }
  68: 
  69:   public void addAttributes(AttributeSet attributes)
  70:   {
  71:     Enumeration e = attributes.getAttributeNames();
  72:     while (e.hasMoreElements())
  73:       {
  74:         Object name = e.nextElement();
  75:         Object val = attributes.getAttribute(name);
  76:         tab.put(name, val);
  77:       }
  78:   }
  79: 
  80:   public Object clone()
  81:   {
  82:     SimpleAttributeSet s = new SimpleAttributeSet();
  83:     s.tab = (Hashtable) tab.clone();
  84:     return s;
  85:   }
  86: 
  87:   public boolean containsAttribute(Object name, Object value)
  88:   {
  89:     return tab.containsKey(name) 
  90:       && tab.get(name).equals(value);
  91:   }
  92:     
  93:   public boolean containsAttributes(AttributeSet attributes)
  94:   {
  95:     Enumeration e = attributes.getAttributeNames();
  96:     while (e.hasMoreElements())
  97:       {
  98:         Object name = e.nextElement();
  99:         Object val = attributes.getAttribute(name);
 100:         if (! containsAttribute(name, val))
 101:           return false;        
 102:       }
 103:     return true;
 104:   }
 105: 
 106:   public AttributeSet copyAttributes()
 107:   {
 108:     return (AttributeSet) clone();
 109:   }
 110: 
 111:   public boolean equals(Object obj)
 112:   {
 113:     return (obj != null) 
 114:       && (obj instanceof SimpleAttributeSet)
 115:       && ((SimpleAttributeSet)obj).tab.equals(this.tab);
 116:   }
 117: 
 118:   public Object getAttribute(Object name)
 119:   {
 120:     Object val = tab.get(name);
 121:     if (val != null) 
 122:       return val;
 123: 
 124:     Object p = getResolveParent();
 125:     if (p != null && p instanceof AttributeSet)
 126:       return (((AttributeSet)p).getAttribute(name));
 127: 
 128:     return null;
 129:   }
 130: 
 131:   public int getAttributeCount()
 132:   {
 133:     return tab.size();
 134:   }
 135: 
 136:   public Enumeration getAttributeNames()
 137:   {
 138:     return tab.keys();
 139:   }
 140: 
 141:   public AttributeSet getResolveParent()
 142:   {
 143:     return (AttributeSet) tab.get(ResolveAttribute);
 144:   }
 145: 
 146:   public int hashCode()
 147:   {
 148:     return tab.hashCode();
 149:   }
 150: 
 151:   public boolean isDefined(Object attrName)
 152:   {
 153:     return tab.containsKey(attrName);
 154:   }
 155: 
 156:   public boolean isEmpty()
 157:   {
 158:     return tab.isEmpty();    
 159:   }
 160:         
 161:   public boolean isEqual(AttributeSet attr)
 162:   {
 163:     return this.equals(attr);
 164:   }
 165:     
 166:   public void removeAttribute(Object name)
 167:   {
 168:     tab.remove(name);
 169:   }
 170: 
 171:   public void removeAttributes(AttributeSet attributes)
 172:   {
 173:     removeAttributes(attributes.getAttributeNames());
 174:   }
 175: 
 176:   public void removeAttributes(Enumeration names)
 177:   {
 178:     while (names.hasMoreElements())
 179:       {
 180:         removeAttribute(names.nextElement());
 181:       }    
 182:   }
 183: 
 184:   public void setResolveParent(AttributeSet parent)
 185:   {
 186:     addAttribute(ResolveAttribute, parent);
 187:   }
 188:     
 189:   public String toString()
 190:   {
 191:     return tab.toString();
 192:   }    
 193: }