--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.xml/share/classes/javax/xml/xpath/XPathEvaluationResult.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,129 @@
+/*
+ * 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.Objects;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+/**
+ * The {@code XPathEvaluationResult} interface represents the result of the
+ * evaluation of an XPath expression within the context of a particular node.
+ * The evaluation of an XPath expression can result in various result types as
+ * defined in XML Path Language (XPath) Version 1.0.
+ *
+ * @param <T> the object type returned by the XPath evaluation.
+ * @see <a href="http://www.w3.org/TR/xpath">XML Path Language (XPath) Version
+ * 1.0</a>
+ *
+ * @since 9
+ */
+public interface XPathEvaluationResult<T> {
+
+    /**
+     * XPathResultType represents possible return types of an XPath evaluation.
+     * Provided as an enum type, it allows the use of switch statement. At the
+     * same time, a mapping is provided between the original QName types in
+     * {@link XPathConstants} and class types used in the generic methods.
+     */
+    public static enum XPathResultType {
+        /**
+         * Any type that represents any of the 5 other types listed below.
+         * Maps to {@link XPathEvaluationResult}.
+         */
+        ANY(new QName("http://www.w3.org/1999/XSL/Transform", "any"), XPathEvaluationResult.class),
+        /**
+         * The XPath 1.0 boolean data type. Maps to Java {@link Boolean}.
+         */
+        BOOLEAN(XPathConstants.BOOLEAN, Boolean.class),
+        /**
+         * The XPath 1.0 Number data type. Maps to Java {@link Number}. Of the
+         * subtypes of Number, only Double, Integer and Long are required.
+         */
+        NUMBER(XPathConstants.NUMBER, Number.class),
+        /**
+         * The XPath 1.0 String data type. Maps to Java {@link String}.
+         */
+        STRING(XPathConstants.STRING, String.class),
+        /**
+         * The XPath 1.0 NodeSet data type. Maps to {@link org.w3c.dom.NodeList}.
+         */
+        NODESET(XPathConstants.NODESET, XPathNodes.class),
+        /**
+         * The XPath 1.0 NodeSet data type. Maps to {@link org.w3c.dom.Node}.
+         */
+        NODE(XPathConstants.NODE, Node.class);
+
+        final QName qnameType;
+        final Class<?> clsType;
+        XPathResultType(QName qnameType, Class<?> clsType) {
+            this.qnameType = qnameType;
+            this.clsType = clsType;
+        }
+
+        /**
+         * Compares this type to the specified class type.
+         * @param clsType class type
+         * @return true if the argument is not null and is a class type that
+         * matches that this type represents, false otherwise.
+         */
+        private boolean equalsClassType(Class<?> clsType) {
+            Objects.nonNull(clsType);
+            if (clsType.isAssignableFrom(this.clsType)) {
+                return true;
+            }
+            return false;
+        }
+
+        /**
+         * Returns the QName type as specified in {@link XPathConstants} that
+         * corresponds to the specified class type.
+         * @param clsType a class type that the enum type supports
+         * @return the QName type that matches with the specified class type,
+         * null if there is no match
+         */
+        static public QName getQNameType(Class<?> clsType) {
+            for (XPathResultType type : XPathResultType.values()) {
+                if (type.equalsClassType(clsType)) {
+                    return type.qnameType;
+                }
+            }
+            return null;
+        }
+    }
+
+    /**
+     * Return the result type as an enum specified by {@code XPathResultType}
+     * @return the result type
+     */
+    public XPathResultType type();
+
+    /**
+     * Returns the value of the result as the type {@code <T>} specified for the class.
+     *
+     * @return The value of the result.
+     */
+    public T value();
+
+}