/******************************************************************************* * Copyright (c) 2009 itemis AG (http://www.itemis.eu) and others. * This program and the accompanying materials are made available under the * terms of the Eclipse Public License 2.0 which is available at * http://www.eclipse.org/legal/epl-2.0. * * SPDX-License-Identifier: EPL-2.0 *******************************************************************************/ package org.eclipse.xtext.parsetree.reconstr.impl; import org.eclipse.xtext.AbstractElement; import org.eclipse.xtext.AbstractRule; import org.eclipse.xtext.Assignment; import org.eclipse.xtext.EcoreUtil2; import org.eclipse.xtext.grammaranalysis.impl.AbstractCachingNFABuilder; import org.eclipse.xtext.grammaranalysis.impl.AbstractNFAProvider; import com.google.inject.Singleton; @Singleton public class TreeConstructionNFAProvider extends AbstractNFAProvider<TreeConstState, TreeConstTransition> { protected static class TreeConstNFABuilder extends AbstractCachingNFABuilder<TreeConstState, TreeConstTransition> { @Override protected TreeConstState createState(AbstractElement grammarElement) { return new TreeConstState(grammarElement, this); } @Override protected TreeConstTransition createTransition(TreeConstState source, TreeConstState target, boolean isRuleCall, AbstractElement loopCenter) { return new TreeConstTransition(source, target, isRuleCall, loopCenter); } @Override public boolean filter(AbstractElement grammarElement) { if (grammarElement.eContainer() instanceof AbstractRule) return false; if (EcoreUtil2.getContainerOfType(grammarElement.eContainer(), Assignment.class) != null) return true; return false; } @Override public NFADirection getDirection() { return NFADirection.BACKWARD; } } @Override protected NFABuilder<TreeConstState, TreeConstTransition> createBuilder() { return new TreeConstNFABuilder(); } }