8074956: ArrayIndexOutOfBoundsException in javax.swing.text.html.parser.ContentModel.first()

Reviewed-by: alexsch, alexp

src/share/classes/javax/swing/text/html/parser/ContentModel.java

@@ -169,10 +169,9 @@ public final class ContentModel implements Serializable {
           case '|':
           case '&': {
             Element e = (Element) token;
-            if (valSet == null) {
+            if (valSet == null || valSet.length <= Element.getMaxIndex()) {
                 valSet = new boolean[Element.getMaxIndex() + 1];
                 val = new boolean[valSet.length];
-                // All Element instances are created before this ever executes
             }
             if (valSet[e.index]) {
                 return val[e.index];

test/javax/swing/text/html/parser/8074956/bug8074956.java

+/*
+ * 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.
+ *
+ * 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.
+ */
+
+import javax.swing.text.html.parser.ContentModel;
+import javax.swing.text.html.parser.DTD;
+import javax.swing.text.html.parser.Element;
+
+/*
+ * @test
+ * @bug 8074956
+ * @author Alexey Ivanov
+ * @summary Tests correct handling of additional HTML elements in ContentModel
+ * @run main bug8074956
+ */
+public class bug8074956 {
+    public static void main(String[] args) throws Exception {
+        final DTD html32 = DTD.getDTD("html32");
+        ContentModel contentModel = new ContentModel('&', new ContentModel());
+
+        Element elem1 = html32.getElement("html-element");
+        contentModel.first(elem1);
+
+        Element elem2 = html32.getElement("test-element");
+        // Shouldn't throw ArrayIndexOutOfBoundsException
+        contentModel.first(elem2);
+    }
+}