| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.uima.ruta.expression; |
| |
| import java.util.Collection; |
| import java.util.List; |
| |
| import org.apache.uima.cas.Feature; |
| import org.apache.uima.cas.Type; |
| import org.apache.uima.cas.text.AnnotationFS; |
| import org.apache.uima.ruta.RutaStream; |
| import org.apache.uima.ruta.expression.feature.FeatureExpression; |
| import org.apache.uima.ruta.expression.string.IStringExpression; |
| import org.apache.uima.ruta.expression.type.ITypeExpression; |
| import org.apache.uima.ruta.rule.MatchContext; |
| |
| public class NullExpression extends FeatureExpression implements IStringExpression, ITypeExpression { |
| |
| @Override |
| public String getStringValue(MatchContext context, RutaStream stream) { |
| return null; |
| } |
| |
| @Override |
| public Collection<AnnotationFS> getFeatureAnnotations(Collection<AnnotationFS> annotations, |
| RutaStream stream, MatchContext context, boolean checkOnFeatureValue) { |
| return null; |
| } |
| |
| @Override |
| public Type getType(MatchContext context, RutaStream stream) { |
| return null; |
| } |
| |
| @Override |
| public Feature getFeature(MatchContext context, RutaStream stream) { |
| return null; |
| } |
| |
| @Override |
| public List<Feature> getFeatures(MatchContext context, RutaStream stream) { |
| return null; |
| } |
| |
| @Override |
| public List<String> getFeatureStringList(MatchContext context, RutaStream stream) { |
| return null; |
| } |
| |
| @Override |
| public ITypeExpression getTypeExpr(MatchContext context, RutaStream stream) { |
| return null; |
| } |
| |
| } |