| /* |
| * 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.lucas.indexer.mapping; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Map; |
| |
| import javax.xml.parsers.SAXParser; |
| |
| import org.xml.sax.Attributes; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| /** |
| * Build Object out of the Index Mapping File (XML) |
| */ |
| public class MappingFileReader extends DefaultHandler { |
| |
| public final static String FIELD = "field"; // the tag name for field |
| // definitions |
| |
| public final static String TERM_SET_COVER_DEFINITION = "termSetCoverDefinition"; |
| |
| public final static String FILTER = "filter"; // filter element name |
| |
| public final static String ANNOTATION = "annotation"; // the tag name for |
| // annotation definitions |
| |
| public final static String FEATURE = "feature"; // the tag name for feature |
| // definitions |
| |
| private Collection<FieldDescription> fieldDescriptions; |
| private SAXParser parser; |
| |
| private FieldDescription currentFieldDescription; |
| private AnnotationDescription currentAnnotationDescription; |
| private Locator currentLocator; |
| private Map<String, ElementMapper<?>> elementMappers; |
| |
| public MappingFileReader(SAXParser parser, |
| Map<String, ElementMapper<?>> elementMappers) throws IOException { |
| super(); |
| fieldDescriptions = new ArrayList<FieldDescription>(); |
| this.parser = parser; |
| this.elementMappers = elementMappers; |
| } |
| |
| public Collection<FieldDescription> readFieldDescriptionsFromFile( |
| File mappingFile) throws IOException, SAXException { |
| |
| parseFile(mappingFile); |
| return fieldDescriptions; |
| } |
| |
| private void parseFile(File mappingFile) throws IOException, SAXException { |
| // try { |
| parser.parse(mappingFile, this); |
| // } catch (SAXException e) { |
| // throw new IOException(e); |
| // } |
| } |
| |
| @Override |
| public void setDocumentLocator(Locator locator) { |
| currentLocator = locator; |
| } |
| |
| @Override |
| public void startElement(String uri, String localName, String qName, |
| Attributes attributes) throws SAXException { |
| if (qName.equals(FIELD)) |
| addFieldDescription(attributes); |
| else if (qName.equals(TERM_SET_COVER_DEFINITION)) |
| addTermSetCoverDefinition(attributes); |
| else if (qName.equals(FILTER)) |
| addFilterDescription(attributes); |
| else if (qName.equals(ANNOTATION)) |
| addAnnotationDescription(attributes); |
| else if (qName.equals(FEATURE)) |
| addFeatureDescription(attributes); |
| } |
| |
| private void addFieldDescription(Attributes attributes) { |
| ElementMapper<FieldDescription> elementMapper = (ElementMapper<FieldDescription>) elementMappers |
| .get(FIELD); |
| currentFieldDescription = elementMapper.mapElement(attributes); |
| currentAnnotationDescription = null; |
| mapLocator(currentFieldDescription); |
| fieldDescriptions.add(currentFieldDescription); |
| } |
| |
| private void addTermSetCoverDefinition(Attributes attributes) { |
| ElementMapper<TermCoverDescription> termSetCoverDefinitionMapper = (ElementMapper<TermCoverDescription>) elementMappers |
| .get(TERM_SET_COVER_DEFINITION); |
| TermCoverDescription termCoverDescription = termSetCoverDefinitionMapper |
| .mapElement(attributes); |
| if (null != currentFieldDescription.getTermCoverDescription()) |
| throw new IllegalStateException( |
| "Only one term cover definition per field is allowed; field \"" |
| + currentFieldDescription.getName() |
| + "\" has at least two."); |
| mapLocator(termCoverDescription); |
| termCoverDescription.setFieldName(currentFieldDescription.getName()); |
| currentFieldDescription.setTermCoverDescription(termCoverDescription); |
| } |
| |
| private void addFilterDescription(Attributes attributes) { |
| ElementMapper<FilterDescription> filterMapper = (ElementMapper<FilterDescription>) elementMappers |
| .get(FILTER); |
| FilterDescription filterDescription = filterMapper |
| .mapElement(attributes); |
| mapLocator(filterDescription); |
| if (currentAnnotationDescription != null) { |
| Collection<FilterDescription> filterDescriptions = currentAnnotationDescription |
| .getFilterDescriptions(); |
| filterDescriptions.add(filterDescription); |
| } else { |
| Collection<FilterDescription> filterDescriptions = currentFieldDescription |
| .getFilterDescriptions(); |
| filterDescriptions.add(filterDescription); |
| } |
| } |
| |
| private void addAnnotationDescription(Attributes attributes) { |
| ElementMapper<AnnotationDescription> annotationMapper = (ElementMapper<AnnotationDescription>) elementMappers |
| .get(ANNOTATION); |
| currentAnnotationDescription = annotationMapper.mapElement(attributes); |
| mapLocator(currentAnnotationDescription); |
| Collection<AnnotationDescription> annotationDescriptions = currentFieldDescription |
| .getAnnotationDescriptions(); |
| annotationDescriptions.add(currentAnnotationDescription); |
| } |
| |
| private void addFeatureDescription(Attributes attributes) { |
| ElementMapper<FeatureDescription> featureMapper = (ElementMapper<FeatureDescription>) elementMappers |
| .get(FEATURE); |
| FeatureDescription featureDescription = featureMapper |
| .mapElement(attributes); |
| mapLocator(featureDescription); |
| Collection<FeatureDescription> featureDescriptions = currentAnnotationDescription |
| .getFeatureDescriptions(); |
| featureDescriptions.add(featureDescription); |
| } |
| |
| private void mapLocator(Locateable locateable) { |
| if (currentLocator != null) { |
| int lineNumber = currentLocator.getLineNumber(); |
| locateable.setLineNumber(lineNumber); |
| int columnNumber = currentLocator.getColumnNumber(); |
| locateable.setColumnNumber(columnNumber); |
| } |
| } |
| |
| } |