| /* |
| * 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 java.lang.invoke.MethodHandles; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.*; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * <p> |
| * {@link Transformer} instance which creates {@link Date} instances out of {@link String}s. |
| * </p> |
| * <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 1.3 |
| */ |
| public class DateFormatTransformer extends Transformer { |
| private Map<String, SimpleDateFormat> fmtCache = new HashMap<>(); |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public Object transformRow(Map<String, Object> aRow, Context context) { |
| |
| for (Map<String, String> map : context.getAllEntityFields()) { |
| Locale locale = Locale.ENGLISH; // we default to ENGLISH for dates for full Java 9 compatibility |
| String customLocale = map.get(LOCALE); |
| if (customLocale != null) { |
| try { |
| locale = new Locale.Builder().setLanguageTag(customLocale).build(); |
| } catch (IllformedLocaleException e) { |
| throw new DataImportHandlerException(DataImportHandlerException.SEVERE, "Invalid Locale specified: " + customLocale, e); |
| } |
| } |
| |
| String fmt = map.get(DATE_TIME_FMT); |
| if (fmt == null) |
| continue; |
| VariableResolver resolver = context.getVariableResolver(); |
| fmt = resolver.replaceTokens(fmt); |
| String column = map.get(DataImporter.COLUMN); |
| String srcCol = map.get(RegexTransformer.SRC_COL_NAME); |
| if (srcCol == null) |
| srcCol = column; |
| try { |
| Object o = aRow.get(srcCol); |
| if (o instanceof List) { |
| @SuppressWarnings({"rawtypes"}) |
| List inputs = (List) o; |
| List<Date> results = new ArrayList<>(); |
| for (Object input : inputs) { |
| results.add(process(input, fmt, locale)); |
| } |
| aRow.put(column, results); |
| } else { |
| if (o != null) { |
| aRow.put(column, process(o, fmt, locale)); |
| } |
| } |
| } catch (ParseException e) { |
| log.warn("Could not parse a Date field ", e); |
| } |
| } |
| return aRow; |
| } |
| |
| private Date process(Object value, String format, Locale locale) throws ParseException { |
| if (value == null) return null; |
| String strVal = value.toString().trim(); |
| if (strVal.length() == 0) |
| return null; |
| SimpleDateFormat fmt = fmtCache.get(format); |
| if (fmt == null) { |
| fmt = new SimpleDateFormat(format, locale); |
| fmtCache.put(format, fmt); |
| } |
| return fmt.parse(strVal); |
| } |
| |
| public static final String DATE_TIME_FMT = "dateTimeFormat"; |
| |
| public static final String LOCALE = "locale"; |
| } |