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[pf3gnuchains/gcc-fork.git] / libjava / classpath / external / w3c_dom / org / w3c / dom / NodeList.java

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+/*
+ * Copyright (c) 2004 World Wide Web Consortium,
+ *
+ * (Massachusetts Institute of Technology, European Research Consortium for
+ * Informatics and Mathematics, Keio University). All Rights Reserved. This
+ * work is distributed under the W3C(r) Software License [1] in the hope that
+ * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
+ */
+
+package org.w3c.dom;
+
+/**
+ * The <code>NodeList</code> interface provides the abstraction of an ordered 
+ * collection of nodes, without defining or constraining how this collection 
+ * is implemented. <code>NodeList</code> objects in the DOM are live.
+ * <p>The items in the <code>NodeList</code> are accessible via an integral 
+ * index, starting from 0.
+ * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
+ */
+public interface NodeList {
+    /**
+     * Returns the <code>index</code>th item in the collection. If 
+     * <code>index</code> is greater than or equal to the number of nodes in 
+     * the list, this returns <code>null</code>.
+     * @param index Index into the collection.
+     * @return The node at the <code>index</code>th position in the 
+     *   <code>NodeList</code>, or <code>null</code> if that is not a valid 
+     *   index.
+     */
+    public Node item(int index);
+
+    /**
+     * The number of nodes in the list. The range of valid child node indices 
+     * is 0 to <code>length-1</code> inclusive.
+     */
+    public int getLength();
+
+}