Merge branch 'Jalview-JS/develop' into develop

[jalview.git] / srcjar_unused / org / apache / log4j / helpers / NullEnumeration.java

diff --git a/srcjar_unused/org/apache/log4j/helpers/NullEnumeration.java b/srcjar_unused/org/apache/log4j/helpers/NullEnumeration.java
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+++ b/srcjar_unused/org/apache/log4j/helpers/NullEnumeration.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (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.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.log4j.helpers;
+
+import java.util.Enumeration;
+import java.util.NoSuchElementException;
+
+/**
+   
+  An always-empty Enumerator.
+
+  @author Anders Kristensen
+  @since version 1.0
+ */
+public class NullEnumeration implements Enumeration {
+  private static final NullEnumeration instance = new NullEnumeration();
+  
+  private
+  NullEnumeration() {
+  }
+  
+  public static NullEnumeration getInstance() {
+    return instance;
+  }
+  
+  public
+  boolean hasMoreElements() {
+    return false;
+  }
+  
+  public
+  Object nextElement() {
+    throw new NoSuchElementException();
+  }
+}