| /* |
| * 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.feature; |
| |
| import org.apache.uima.cas.Feature; |
| import org.apache.uima.cas.Type; |
| import org.apache.uima.cas.text.AnnotationFS; |
| |
| public class LazyFeature implements Feature { |
| |
| private Feature delegate; |
| |
| private String featureName; |
| |
| public LazyFeature(String featureName) { |
| super(); |
| this.featureName = featureName; |
| } |
| |
| public Feature initialize(Type type) { |
| delegate = type.getFeatureByBaseName(featureName); |
| if(delegate == null) { |
| return this; |
| } |
| return delegate; |
| } |
| |
| public Feature initialize(AnnotationFS annotation) { |
| if(annotation!= null) { |
| delegate = annotation.getType().getFeatureByBaseName(featureName); |
| } |
| if(delegate == null) { |
| return this; |
| } |
| return delegate; |
| } |
| |
| @Override |
| public int compareTo(Feature o) { |
| checkDelegate(); |
| return delegate.compareTo(o); |
| } |
| |
| @Override |
| public Type getDomain() { |
| checkDelegate(); |
| return delegate.getDomain(); |
| } |
| |
| @Override |
| public Type getRange() { |
| checkDelegate(); |
| return delegate.getRange(); |
| } |
| |
| @Override |
| public String getName() { |
| checkDelegate(); |
| return delegate.getName(); |
| } |
| |
| @Override |
| public String getShortName() { |
| checkDelegate(); |
| return delegate.getShortName(); |
| } |
| |
| @Override |
| public boolean isMultipleReferencesAllowed() { |
| checkDelegate(); |
| return delegate.isMultipleReferencesAllowed(); |
| } |
| |
| public String getFeatureName() { |
| return featureName; |
| } |
| |
| private void checkDelegate() { |
| if(delegate == null) { |
| throw new RuntimeException("Feature with name '"+ featureName +"' has not yet been resolved. Most likely, it is not defined for the given type."); |
| } |
| |
| } |
| |
| } |