| /* |
| * 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.solr.handler.dataimport; |
| |
| import static org.apache.solr.handler.dataimport.HTMLStripTransformer.TRUE; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.sql.Clob; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * {@link Transformer} instance which converts a {@link Clob} to a {@link String}. |
| * <p> |
| * Refer to <a href="http://wiki.apache.org/solr/DataImportHandler">http://wiki.apache.org/solr/DataImportHandler</a> |
| * for more details. |
| * <p> |
| * <b>This API is experimental and subject to change</b> |
| * |
| * @since solr 1.4 |
| */ |
| public class ClobTransformer extends Transformer { |
| @Override |
| public Object transformRow(Map<String, Object> aRow, Context context) { |
| for (Map<String, String> map : context.getAllEntityFields()) { |
| if (!TRUE.equals(map.get(CLOB))) continue; |
| String column = map.get(DataImporter.COLUMN); |
| String srcCol = map.get(RegexTransformer.SRC_COL_NAME); |
| if (srcCol == null) |
| srcCol = column; |
| Object o = aRow.get(srcCol); |
| if (o instanceof List) { |
| @SuppressWarnings({"unchecked"}) |
| List<Clob> inputs = (List<Clob>) o; |
| List<String> results = new ArrayList<>(); |
| for (Object input : inputs) { |
| if (input instanceof Clob) { |
| Clob clob = (Clob) input; |
| results.add(readFromClob(clob)); |
| } |
| } |
| aRow.put(column, results); |
| } else { |
| if (o instanceof Clob) { |
| Clob clob = (Clob) o; |
| aRow.put(column, readFromClob(clob)); |
| } |
| } |
| } |
| return aRow; |
| } |
| |
| private String readFromClob(Clob clob) { |
| Reader reader = FieldReaderDataSource.readCharStream(clob); |
| StringBuilder sb = new StringBuilder(); |
| char[] buf = new char[1024]; |
| int len; |
| try { |
| while ((len = reader.read(buf)) != -1) { |
| sb.append(buf, 0, len); |
| } |
| } catch (IOException e) { |
| DataImportHandlerException.wrapAndThrow(DataImportHandlerException.SEVERE, e); |
| } |
| return sb.toString(); |
| } |
| |
| public static final String CLOB = "clob"; |
| } |