implementation of the "bozo filter" on a topic level, including a topic-level

"Manage" screen (to hang "Rename Topic" from later, too).

src/com/silverwrist/util/OptionSet.java

@@ -0,0 +1,146 @@
+/*
+ * 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 is 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 is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.util;
+
+import java.util.BitSet;
+
+public class OptionSet extends BitSet
+{
+  /*--------------------------------------------------------------------------------
+   * Static data members
+   *--------------------------------------------------------------------------------
+   */
+
+  private static final String ALPHA = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+                                    + "!#$%&()*+,-./:;<=>?@[]^_`{|}~";
+
+  /*--------------------------------------------------------------------------------
+   * Constructors
+   *--------------------------------------------------------------------------------
+   */
+
+  public OptionSet()
+  {
+    super();
+
+  } // end constructor
+
+  public OptionSet(int nbits)
+  {
+    super(Math.min(nbits,ALPHA.length()));
+
+  } // end constructor
+
+  public OptionSet(char[] options)
+  {
+    super();  // initialize all bits to 0
+    for (int i=0; i<options.length; i++)
+    { // look at all the chars in the option string and set bits accordingly
+      int ndx = ALPHA.indexOf(options[i]);
+      if (ndx>=0)
+	super.set(ndx);
+
+    } // end for
+
+  } // end constructor
+
+  public OptionSet(String options)
+  {
+    this(options.toCharArray());
+
+  } // end constructor
+
+  private StringBuffer asStringBuffer()
+  {
+    StringBuffer b = new StringBuffer();
+    for (int i=0; i<super.length(); i++)
+      if (super.get(i))
+	b.append(ALPHA.charAt(i));
+    return b;
+
+  } // end asStringBuffer
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class BitSet
+   *--------------------------------------------------------------------------------
+   */
+
+  public void clear(int bitIndex)
+  {
+    if (bitIndex>=ALPHA.length())
+      throw new IndexOutOfBoundsException();
+    super.clear(bitIndex);
+
+  } // end clear
+
+  public boolean get(int bitIndex)
+  {
+    if (bitIndex>=ALPHA.length())
+      throw new IndexOutOfBoundsException();
+    return super.get(bitIndex);
+
+  } // end get
+
+  public void set(int bitIndex)
+  {
+    if (bitIndex>=ALPHA.length())
+      throw new IndexOutOfBoundsException();
+    super.set(bitIndex);
+
+  } // end set
+
+  /*--------------------------------------------------------------------------------
+   * External operations
+   *--------------------------------------------------------------------------------
+   */
+
+  public void assign(char[] options)
+  {
+    int i;
+    for (i=0; i<super.length(); i++)
+      super.clear(i);
+
+    for (i=0; i<options.length; i++)
+    { // look at all the chars in the option string and set bits accordingly
+      int ndx = ALPHA.indexOf(options[i]);
+      if (ndx>=0)
+	super.set(ndx);
+
+    } // end for
+
+  } // end assign
+
+  public void assign(String options)
+  {
+    assign(options.toCharArray());
+
+  } // end assign
+
+  public char[] asCharArray()
+  {
+    return asStringBuffer().toString().toCharArray();
+
+  } // end asCharArray
+
+  public String asString()
+  {
+    return asStringBuffer().toString();
+
+  } // end asString
+
+} // end class OptionSet