Coverage Report - com.sun.javafx.runtime.sequence.EmptySequence
 
Classes in this File Line Coverage Branch Coverage Complexity
EmptySequence
100%
10/10
100%
2/2
0
 
 1  
 /*
 2  
  * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
 3  
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  
  *
 5  
  * This code is free software; you can redistribute it and/or modify it
 6  
  * under the terms of the GNU General Public License version 2 only, as
 7  
  * published by the Free Software Foundation.  Sun designates this
 8  
  * particular file as subject to the "Classpath" exception as provided
 9  
  * by Sun in the LICENSE file that accompanied this code.
 10  
  *
 11  
  * This code is distributed in the hope that it will be useful, but WITHOUT
 12  
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13  
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 14  
  * version 2 for more details (a copy is included in the LICENSE file that
 15  
  * accompanied this code).
 16  
  *
 17  
  * You should have received a copy of the GNU General Public License version
 18  
  * 2 along with this work; if not, write to the Free Software Foundation,
 19  
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 20  
  *
 21  
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 22  
  * CA 95054 USA or visit www.sun.com if you need additional information or
 23  
  * have any questions.
 24  
  */
 25  
 
 26  
 package com.sun.javafx.runtime.sequence;
 27  
 
 28  
 import java.util.HashMap;
 29  
 import java.util.Map;
 30  
 
 31  
 /**
 32  
  * Represents an empty sequence of a specific type.  Empty sequences are cached using the "Flyweight" pattern.
 33  
  * To construct an empty sequence, use the Sequences.emptySequence() factory, not the EmptySequence constructor.
 34  
  * O(1) space and time construction costs.  
 35  
  *
 36  
  * @author Brian Goetz
 37  
  */
 38  
 class EmptySequence<T> extends AbstractSequence<T> implements Sequence<T> {
 39  
 
 40  250
     private static final Map<Class<?>, Sequence<?>> map = new HashMap<Class<?>, Sequence<?>>();
 41  
 
 42  
     public EmptySequence(Class<T> clazz) {
 43  384
         super(clazz);
 44  384
     }
 45  
 
 46  
     @SuppressWarnings("unchecked")
 47  
     public static<T> Sequence<T> get(Class<T> clazz) {
 48  9259
         Sequence<?> e = map.get(clazz);
 49  9259
         if (e == null) {
 50  384
             e = new EmptySequence<T>(clazz);
 51  384
             map.put(clazz, e);
 52  
         }
 53  9259
         return (Sequence<T>) e;
 54  
     }
 55  
 
 56  
     @Override
 57  
     public int size() {
 58  45026
         return 0;
 59  
     }
 60  
 
 61  
     @Override
 62  
     public T get(int position) {
 63  1713
         throw new IndexOutOfBoundsException(Integer.toString(position));
 64  
     }
 65  
 }