| /* |
| * 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.analytics.util; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.Date; |
| |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.NumericUtils; |
| import org.apache.solr.schema.FieldType; |
| import org.apache.solr.schema.TrieDateField; |
| import org.apache.solr.schema.TrieDoubleField; |
| import org.apache.solr.schema.TrieFloatField; |
| import org.apache.solr.schema.TrieIntField; |
| import org.apache.solr.schema.TrieLongField; |
| |
| /** |
| * Class to hold the parsers used for Solr Analytics. |
| */ |
| public class AnalyticsParsers { |
| |
| /** |
| * Returns a parser that will translate a BytesRef or long from DocValues into |
| * a String that correctly represents the value. |
| * @param class1 class of the FieldType of the field being faceted on. |
| * @return A Parser |
| */ |
| public static Parser getParser(Class<? extends FieldType> class1) { |
| if (class1.equals(TrieIntField.class)) { |
| return AnalyticsParsers.INT_DOC_VALUES_PARSER; |
| } else if (class1.equals(TrieLongField.class)) { |
| return AnalyticsParsers.LONG_DOC_VALUES_PARSER; |
| } else if (class1.equals(TrieFloatField.class)) { |
| return AnalyticsParsers.FLOAT_DOC_VALUES_PARSER; |
| } else if (class1.equals(TrieDoubleField.class)) { |
| return AnalyticsParsers.DOUBLE_DOC_VALUES_PARSER; |
| } else if (class1.equals(TrieDateField.class)) { |
| return AnalyticsParsers.DATE_DOC_VALUES_PARSER; |
| } else { |
| return AnalyticsParsers.STRING_PARSER; |
| } |
| } |
| |
| /** |
| * For use in classes that grab values by docValue. |
| * Converts a BytesRef object into the correct readable text. |
| */ |
| public static interface Parser { |
| String parse(BytesRef bytes) throws IOException; |
| } |
| |
| /** |
| * Converts the long returned by NumericDocValues into the |
| * correct number and return it as a string. |
| */ |
| public static interface NumericParser extends Parser { |
| String parseNum(long l); |
| } |
| |
| /** |
| * Converts the BytesRef or long to the correct int string. |
| */ |
| public static final NumericParser INT_DOC_VALUES_PARSER = new NumericParser() { |
| public String parse(BytesRef bytes) throws IOException { |
| try { |
| return ""+NumericUtils.prefixCodedToInt(bytes); |
| } catch (NumberFormatException e) { |
| throw new IOException("The byte array "+Arrays.toString(bytes.bytes)+" cannot be converted to an int."); |
| } |
| } |
| @Override |
| public String parseNum(long l) { |
| return ""+(int)l; |
| } |
| }; |
| |
| /** |
| * Converts the BytesRef or long to the correct long string. |
| */ |
| public static final NumericParser LONG_DOC_VALUES_PARSER = new NumericParser() { |
| public String parse(BytesRef bytes) throws IOException { |
| try { |
| return ""+NumericUtils.prefixCodedToLong(bytes); |
| } catch (NumberFormatException e) { |
| throw new IOException("The byte array "+Arrays.toString(bytes.bytes)+" cannot be converted to a long."); |
| } |
| } |
| @Override |
| public String parseNum(long l) { |
| return ""+l; |
| } |
| }; |
| |
| /** |
| * Converts the BytesRef or long to the correct float string. |
| */ |
| public static final NumericParser FLOAT_DOC_VALUES_PARSER = new NumericParser() { |
| public String parse(BytesRef bytes) throws IOException { |
| try { |
| return ""+NumericUtils.sortableIntToFloat(NumericUtils.prefixCodedToInt(bytes)); |
| } catch (NumberFormatException e) { |
| throw new IOException("The byte array "+Arrays.toString(bytes.bytes)+" cannot be converted to a float."); |
| } |
| } |
| @Override |
| public String parseNum(long l) { |
| return ""+NumericUtils.sortableIntToFloat((int)l); |
| } |
| }; |
| |
| /** |
| * Converts the BytesRef or long to the correct double string. |
| */ |
| public static final NumericParser DOUBLE_DOC_VALUES_PARSER = new NumericParser() { |
| public String parse(BytesRef bytes) throws IOException { |
| try { |
| return ""+NumericUtils.sortableLongToDouble(NumericUtils.prefixCodedToLong(bytes)); |
| } catch (NumberFormatException e) { |
| throw new IOException("The byte array "+Arrays.toString(bytes.bytes)+" cannot be converted to a double."); |
| } |
| } |
| @Override |
| public String parseNum(long l) { |
| return ""+NumericUtils.sortableLongToDouble(l); |
| } |
| }; |
| |
| /** |
| * Converts the BytesRef or long to the correct date string. |
| */ |
| public static final NumericParser DATE_DOC_VALUES_PARSER = new NumericParser() { |
| @SuppressWarnings("deprecation") |
| public String parse(BytesRef bytes) throws IOException { |
| try { |
| return TrieDateField.formatExternal(new Date(NumericUtils.prefixCodedToLong(bytes))); |
| } catch (NumberFormatException e) { |
| throw new IOException("The byte array "+Arrays.toString(bytes.bytes)+" cannot be converted to a date."); |
| } |
| } |
| @SuppressWarnings("deprecation") |
| @Override |
| public String parseNum(long l) { |
| return ""+TrieDateField.formatExternal(new Date(l)); |
| } |
| }; |
| |
| /** |
| * Converts the BytesRef to the correct string. |
| */ |
| public static final Parser STRING_PARSER = new Parser() { |
| public String parse(BytesRef bytes) { |
| return bytes.utf8ToString(); |
| } |
| }; |
| } |