| /* |
| * 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 jdk.nashorn.api.tree; |
| |
| |
| /** |
| * Indicates that an unknown kind of Tree was encountered. This |
| * can occur if the language evolves and new kinds of Trees are |
| * added to the {@code Tree} hierarchy. May be thrown by a |
| * {@linkplain TreeVisitor tree visitor} to indicate that the |
| * visitor was created for a prior version of the language. |
| * |
| * @since 9 |
| */ |
| public class UnknownTreeException extends RuntimeException { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private transient final Tree tree; |
| private transient final Object parameter; |
| |
| /** |
| * Creates a new {@code UnknownTreeException}. The {@code p} |
| * parameter may be used to pass in an additional argument with |
| * information about the context in which the unknown element was |
| * encountered; for example, the visit methods of {@link |
| * TreeVisitor} may pass in their additional parameter. |
| * |
| * @param t the unknown tree, may be {@code null} |
| * @param p an additional parameter, may be {@code null} |
| */ |
| public UnknownTreeException(final Tree t, final Object p) { |
| super("Unknown tree: " + t); |
| this.tree = t; |
| this.parameter = p; |
| } |
| |
| /** |
| * Returns the unknown tree. |
| * The value may be unavailable if this exception has been |
| * serialized and then read back in. |
| * |
| * @return the unknown element, or {@code null} if unavailable |
| */ |
| public Tree getUnknownTree() { |
| return tree; |
| } |
| |
| /** |
| * Returns the additional argument. |
| * The value may be unavailable if this exception has been |
| * serialized and then read back in. |
| * |
| * @return the additional argument |
| */ |
| public Object getArgument() { |
| return parameter; |
| } |
| } |