| /* |
| * Copyright 2007 Sascha Weinreuter |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.intellij.plugins.xsltDebugger.rt.engine.local; |
| |
| import org.intellij.plugins.xsltDebugger.rt.engine.Debugger.Frame; |
| |
| /** |
| * Created by IntelliJ IDEA. |
| * User: sweinreuter |
| * Date: 02.06.2007 |
| */ |
| public abstract class AbstractFrame<F extends Frame> implements Frame<F> { |
| private final F myPrev; |
| private F myNext; |
| |
| private boolean myValid = true; |
| |
| public AbstractFrame(F prev) { |
| myPrev = prev; |
| |
| if (prev != null) { |
| ((AbstractFrame)prev).myNext = this; |
| } |
| } |
| |
| public void invalidate() { |
| assert myValid; |
| assert myNext == null; |
| if (myPrev != null) { |
| ((AbstractFrame)myPrev).myNext = null; |
| } |
| myValid = false; |
| } |
| |
| public F getNext() { |
| assert myValid; |
| return myNext; |
| } |
| |
| public F getPrevious() { |
| assert myValid; |
| return myPrev; |
| } |
| |
| public boolean isValid() { |
| return myValid; |
| } |
| |
| protected static void debug(Throwable e) { |
| assert _debug(e); |
| } |
| |
| @SuppressWarnings("CallToPrintStackTrace") |
| private static boolean _debug(Throwable e) { |
| e.printStackTrace(); |
| return true; |
| } |
| } |