8054196: XPath: support any type

Reviewed-by: alanb, lancea, dfuchs

jaxp/src/java.xml/share/classes/javax/xml/xpath/XPathNodes.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed 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.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package javax.xml.xpath;
+
+import java.util.Iterator;
+import org.w3c.dom.Node;
+
+/**
+ * XPathNodes represents a set of nodes selected by a location path as specified
+ * in <a href="http://www.w3.org/TR/xpath/#node-sets">XML Path Language (XPath)
+ * Version 1.0, 3.3 Node-sets</a>.
+ *
+ * @since 1.9
+ */
+public interface XPathNodes extends Iterable<Node> {
+
+    /**
+     * Returns an iterator of the Nodes.
+     *
+     * @return an Iterator.
+     */
+    @Override
+    public abstract Iterator<Node> iterator();
+
+    /**
+     * Returns the number of items in the result
+     *
+     * @return The number of items in the result
+     */
+    public abstract int size();
+
+    /**
+     * Returns a Node at the specified position
+     *
+     * @param index Index of the element to return.
+     * @return The Node at the specified position.
+     * @throws javax.xml.xpath.XPathException If the index is out of range
+     * (index &lt; 0 || index &gt;= size())
+     */
+    public abstract Node get(int index)
+            throws XPathException;
+}