X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Futil%2FFastSet.java;h=289e5ec22c1546ae98569aff99368a5aa64164d4;hp=1e6c6d5f9d3b762c41eb3198bc2f2ff994d59253;hb=HEAD;hpb=4eeae516c2ef96ca11d24f23fd5e80d12e7734a6

diff --git a/src/edu/berkeley/sbp/util/FastSet.java b/src/edu/berkeley/sbp/util/FastSet.java
index 1e6c6d5..289e5ec 100644
--- a/src/edu/berkeley/sbp/util/FastSet.java
+++ b/src/edu/berkeley/sbp/util/FastSet.java
@@ -1,7 +1,9 @@
+// Copyright 2006-2007 all rights reserved; see LICENSE file for BSD-style license
+
 package edu.berkeley.sbp.util;
 import java.util.*;
 
-public /*final*/ class FastSet<T> implements Iterator<T>, Iterable<T>, Visitable<T> {
+public final class FastSet<T> implements Iterator<T>, Iterable<T>, Visitable<T> {
 
     public static final int INITIAL_SIZE = 8;
 
@@ -20,6 +22,12 @@ public /*final*/ class FastSet<T> implements Iterator<T>, Iterable<T>, Visitable
         return (T)array[i];
     }
 
+    public T first() {
+        if (only != null) return only;
+        if (array != null) return (T)(array[0]);
+        return null;
+    }
+
     public FastSet() { }
     public FastSet(T t) { only = t; }
     public FastSet(Set<T> s) {
@@ -28,10 +36,28 @@ public /*final*/ class FastSet<T> implements Iterator<T>, Iterable<T>, Visitable
         for(T t : s) array[size++] = t;
     }
 
-    public <B,C> void invoke(Invokable<T,B,C> ivbc, B b, C c) {
+    public void remove(T t) {
+        if (only != null) {
+            if (only==t) only=null;
+            return;
+        }
+        boolean found = false;
+        int j;
+        for(j=0; j<size; j++)
+            if (array[j]==t) {
+                found = true;
+                break;
+            }
+        if (!found) return;
+        array[j] = array[size-1];
+        array[size-1] = null;
+        size--;
+    }
+
+    public <B,C> void visit(Invokable<T,B,C> ivbc, B b, C c) {
         if (only!=null) ivbc.invoke(only, b, c);
         else for(int j=0; j<size; j++)
-            ivbc.invoke((T)array[j], b, c);
+                 ivbc.invoke((T)array[j], b, c);
     }
 
     public int size() { return only==null ? size : 1; }