Extracted from Enumerations

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270950 13f79535-47bb-0310-9956-ffa450edef68

proposal/sandbox/junit/src/main/org/apache/tools/ant/taskdefs/optional/junit/ArrayEnumeration.java

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+/*
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2002 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution, if
+ *    any, must include the following acknowlegement:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowlegement may appear in the software itself,
+ *    if and wherever such third-party acknowlegements normally appear.
+ *
+ * 4. The names "The Jakarta Project", "Ant", and "Apache Software
+ *    Foundation" must not be used to endorse or promote products derived
+ *    from this software without prior written permission. For written
+ *    permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache"
+ *    nor may "Apache" appear in their names without prior written
+ *    permission of the Apache Group.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ */
+package org.apache.tools.ant.taskdefs.optional.junit;
+
+import java.util.Enumeration;
+import java.util.NoSuchElementException;
+
+/**
+ * Convenient enumeration over an array of objects.
+ * @author <a href="mailto:sbailliez@imediation.com">Stephane Bailliez</a>
+ */
+class ArrayEnumeration implements Enumeration {
+
+        /** object array */
+        private Object[] array;
+
+        /** current index */
+        private int pos;
+
+        /**
+         * Initialize a new enumeration that wraps an array.
+         * @param       array   the array of object to enumerate.
+         */
+        public ArrayEnumeration(Object[] array){
+                this.array = array;
+                this.pos = 0;
+        }
+        /**
+         * Tests if this enumeration contains more elements.
+         *
+         * @return  <code>true</code> if and only if this enumeration object
+         *           contains at least one more element to provide;
+         *          <code>false</code> otherwise.
+         */
+        public boolean hasMoreElements() {
+                return (pos < array.length);
+        }
+
+        /**
+         * Returns the next element of this enumeration if this enumeration
+         * object has at least one more element to provide.
+         *
+         * @return     the next element of this enumeration.
+         * @throws  NoSuchElementException  if no more elements exist.
+         */
+        public Object nextElement() throws NoSuchElementException {
+                if (hasMoreElements()) {
+                        Object o = array[pos];
+                        pos++;
+                        return o;
+                }
+                throw new NoSuchElementException();
+        }
+}
+