--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/util/MetaKeywords.java	Sat Nov 28 18:52:17 2015 -0800
@@ -0,0 +1,149 @@
+/*
+ * Copyright (config) 2002, 2016, 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 jdk.javadoc.internal.doclets.toolkit.util;
+
+import java.util.*;
+
+import javax.lang.model.element.Element;
+import javax.lang.model.element.PackageElement;
+import javax.lang.model.element.TypeElement;
+
+import jdk.javadoc.internal.doclets.toolkit.Configuration;
+
+/**
+ * Provides methods for creating an array of class, method and
+ * field names to be included as meta keywords in the HTML header
+ * of class pages.  These keywords improve search results
+ * on browsers that look for keywords.
+ *
+ *  <p><b>This is NOT part of any supported API.
+ *  If you write code that depends on this, you do so at your own risk.
+ *  This code and its internal interfaces are subject to change or
+ *  deletion without notice.</b>
+ *
+ * @author Doug Kramer
+ */
+public class MetaKeywords {
+
+    /**
+     * The global configuration information for this run.
+     */
+    private final Configuration config;
+
+    /**
+     * Constructor
+     */
+    public MetaKeywords(Configuration configuration) {
+        config = configuration;
+    }
+
+    /**
+     * Returns an array of strings where each element
+     * is a class, method or field name.  This array is
+     * used to create one meta keyword tag for each element.
+     * Method parameter lists are converted to "()" and
+     * overloads are combined.
+     *
+     * Constructors are not included because they have the same
+     * name as the class, which is already included.
+     * Nested class members are not included because their
+     * definitions are on separate pages.
+     */
+    public List<String> getMetaKeywords(TypeElement typeElement) {
+        ArrayList<String> results = new ArrayList<>();
+
+        // Add field and method keywords only if -keywords option is used
+        if (config.keywords) {
+            results.addAll(getClassKeyword(typeElement));
+            results.addAll(getMemberKeywords(config.utils.getFields(typeElement)));
+            results.addAll(getMemberKeywords(config.utils.getMethods(typeElement)));
+        }
+        ((ArrayList)results).trimToSize();
+        return results;
+    }
+
+    /**
+     * Get the current class for a meta tag keyword, as the first
+     * and only element of an array list.
+     */
+    protected List<String> getClassKeyword(TypeElement typeElement) {
+        ArrayList<String> metakeywords = new ArrayList<>(1);
+        String cltypelower = config.utils.isInterface(typeElement) ? "interface" : "class";
+        metakeywords.add(config.utils.getFullyQualifiedName(typeElement) + " " + cltypelower);
+        return metakeywords;
+    }
+
+    /**
+     * Get the package keywords.
+     */
+    public List<String> getMetaKeywords(PackageElement packageElement) {
+        List<String> result = new ArrayList<>(1);
+        if (config.keywords) {
+            String pkgName = config.utils.getPackageName(packageElement);
+            result.add(pkgName + " " + "package");
+        }
+        return result;
+    }
+
+    /**
+     * Get the overview keywords.
+     */
+    public List<String> getOverviewMetaKeywords(String title, String docTitle) {
+         List<String> result = new ArrayList<>(1);
+        if (config.keywords) {
+            String windowOverview = config.getText(title);
+            if (docTitle.length() > 0) {
+                result.add(windowOverview + ", " + docTitle);
+            } else {
+                result.add(windowOverview);
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Get members for meta tag keywords as an array,
+     * where each member name is a string element of the array.
+     * The parameter lists are not included in the keywords;
+     * therefore all overloaded methods are combined.<br>
+     * Example: getValue(Object) is returned in array as getValue()
+     *
+     * @param members  array of members to be added to keywords
+     */
+    protected List<String> getMemberKeywords(List<? extends Element> members) {
+        ArrayList<String> results = new ArrayList<>();
+        for (Element member : members) {
+            String membername = config.utils.isMethod(member)
+                    ? config.utils.getSimpleName(member) + "()"
+                    : config.utils.getSimpleName(member);
+            if (!results.contains(membername)) {
+                results.add(membername);
+            }
+        }
+        ((ArrayList)results).trimToSize();
+        return results;
+    }
+}