| /* |
| * 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.update.processor; |
| |
| import org.apache.solr.request.SolrQueryRequest; |
| import org.apache.solr.response.SolrQueryResponse; |
| import org.apache.solr.schema.DoubleValueFieldType; |
| import org.apache.solr.schema.FieldType; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.math.RoundingMode; |
| import java.text.NumberFormat; |
| import java.text.ParsePosition; |
| import java.util.Locale; |
| |
| /** |
| * <p> |
| * Attempts to mutate selected fields that have only CharSequence-typed values |
| * into Double values. If required, rounding uses ceiling mode: |
| * {@link RoundingMode#CEILING}. Grouping separators (',' in the ROOT locale) |
| * are parsed. |
| * </p> |
| * <p> |
| * The default selection behavior is to mutate both those fields that don't match |
| * a schema field, as well as those fields that match a schema field with a double |
| * field type. |
| * </p> |
| * <p> |
| * If all values are parseable as double (or are already Double), then the field |
| * will be mutated, replacing each value with its parsed Double equivalent; |
| * otherwise, no mutation will occur. |
| * </p> |
| * <p> |
| * The locale to use when parsing field values, which will affect the recognized |
| * grouping separator and decimal characters, may optionally be specified. If |
| * no locale is configured, then {@link Locale#ROOT} will be used. The following |
| * configuration specifies the Russian/Russia locale, which will parse the string |
| * string "12 345,899" as double value 12345.899 (the grouping separator |
| * character is U+00AO NO-BREAK SPACE). |
| * </p> |
| * |
| * <pre class="prettyprint"> |
| * <processor class="solr.ParseDoubleFieldUpdateProcessorFactory"> |
| * <str name="locale">ru_RU</str> |
| * </processor></pre> |
| * |
| * <p> |
| * See {@link Locale} for a description of acceptable language, country (optional) |
| * and variant (optional) values, joined with underscore(s). |
| * </p> |
| * @since 4.4.0 |
| */ |
| public class ParseDoubleFieldUpdateProcessorFactory extends ParseNumericFieldUpdateProcessorFactory { |
| |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| @Override |
| public UpdateRequestProcessor getInstance(SolrQueryRequest req, |
| SolrQueryResponse rsp, |
| UpdateRequestProcessor next) { |
| return new ParseDoubleFieldUpdateProcessor(getSelector(), locale, next); |
| } |
| |
| private static final class ParseDoubleFieldUpdateProcessor extends AllValuesOrNoneFieldMutatingUpdateProcessor { |
| private final Locale locale; |
| // NumberFormat instances are not thread safe |
| private final ThreadLocal<NumberFormat> numberFormat = new ThreadLocal<NumberFormat>() { |
| @Override |
| protected NumberFormat initialValue() { |
| NumberFormat format = NumberFormat.getInstance(locale); |
| format.setParseIntegerOnly(false); |
| format.setRoundingMode(RoundingMode.CEILING); |
| return format; |
| } |
| }; |
| |
| ParseDoubleFieldUpdateProcessor(FieldNameSelector selector, Locale locale, UpdateRequestProcessor next) { |
| super(selector, next); |
| this.locale = locale; |
| } |
| |
| @Override |
| protected Object mutateValue(Object srcVal) { |
| Object parsed = parsePossibleDouble(srcVal, numberFormat.get()); |
| return parsed != null ? parsed : SKIP_FIELD_VALUE_LIST_SINGLETON; |
| } |
| } |
| |
| @Override |
| protected boolean isSchemaFieldTypeCompatible(FieldType type) { |
| return type instanceof DoubleValueFieldType; |
| } |
| |
| public static Object parsePossibleDouble(Object srcVal, NumberFormat numberFormat) { |
| if (srcVal instanceof CharSequence) { |
| String stringVal = srcVal.toString(); |
| ParsePosition pos = new ParsePosition(0); |
| Number number = numberFormat.parse(stringVal, pos); |
| if (pos.getIndex() != stringVal.length()) { |
| if (log.isDebugEnabled()) { |
| log.debug("value '{}' is not parseable, thus not mutated; unparsed chars: '{}'", |
| srcVal, stringVal.substring(pos.getIndex())); |
| } |
| return null; |
| } |
| return number.doubleValue(); |
| } |
| if (srcVal instanceof Double) { |
| return srcVal; |
| } |
| if (srcVal instanceof Float) { |
| return ((Float) srcVal).doubleValue(); |
| } |
| return null; |
| } |
| } |