| /* |
| * 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.lucene.queries.function.valuesource; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.lucene.index.DocValues; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.NumericDocValues; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSourceScorer; |
| import org.apache.lucene.queries.function.docvalues.IntDocValues; |
| import org.apache.lucene.search.Weight; |
| import org.apache.lucene.util.mutable.MutableValue; |
| import org.apache.lucene.util.mutable.MutableValueInt; |
| |
| /** |
| * Obtains int field values from {@link org.apache.lucene.index.LeafReader#getNumericDocValues} and makes |
| * those values available as other numeric types, casting as needed. |
| * strVal of the value is not the int value, but its string (displayed) value |
| */ |
| public class EnumFieldSource extends FieldCacheSource { |
| static final Integer DEFAULT_VALUE = -1; |
| |
| final Map<Integer, String> enumIntToStringMap; |
| final Map<String, Integer> enumStringToIntMap; |
| |
| public EnumFieldSource(String field, Map<Integer, String> enumIntToStringMap, Map<String, Integer> enumStringToIntMap) { |
| super(field); |
| this.enumIntToStringMap = enumIntToStringMap; |
| this.enumStringToIntMap = enumStringToIntMap; |
| } |
| |
| private static Integer tryParseInt(String valueStr) { |
| Integer intValue = null; |
| try { |
| intValue = Integer.parseInt(valueStr); |
| } |
| catch (NumberFormatException e) { |
| } |
| return intValue; |
| } |
| |
| private String intValueToStringValue(Integer intVal) { |
| if (intVal == null) |
| return null; |
| |
| final String enumString = enumIntToStringMap.get(intVal); |
| if (enumString != null) |
| return enumString; |
| // can't find matching enum name - return DEFAULT_VALUE.toString() |
| return DEFAULT_VALUE.toString(); |
| } |
| |
| private Integer stringValueToIntValue(String stringVal) { |
| if (stringVal == null) |
| return null; |
| |
| Integer intValue; |
| final Integer enumInt = enumStringToIntMap.get(stringVal); |
| if (enumInt != null) //enum int found for string |
| return enumInt; |
| |
| //enum int not found for string |
| intValue = tryParseInt(stringVal); |
| if (intValue == null) //not Integer |
| intValue = DEFAULT_VALUE; |
| final String enumString = enumIntToStringMap.get(intValue); |
| if (enumString != null) //has matching string |
| return intValue; |
| |
| return DEFAULT_VALUE; |
| } |
| |
| @Override |
| public String description() { |
| return "enum(" + field + ')'; |
| } |
| |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| final NumericDocValues arr = DocValues.getNumeric(readerContext.reader(), field); |
| |
| return new IntDocValues(this) { |
| final MutableValueInt val = new MutableValueInt(); |
| |
| int lastDocID; |
| |
| private int getValueForDoc(int doc) throws IOException { |
| if (doc < lastDocID) { |
| throw new AssertionError("docs were sent out-of-order: lastDocID=" + lastDocID + " vs doc=" + doc); |
| } |
| lastDocID = doc; |
| int curDocID = arr.docID(); |
| if (doc > curDocID) { |
| curDocID = arr.advance(doc); |
| } |
| if (doc == curDocID) { |
| return (int) arr.longValue(); |
| } else { |
| return 0; |
| } |
| } |
| |
| @Override |
| public int intVal(int doc) throws IOException { |
| return getValueForDoc(doc); |
| } |
| |
| @Override |
| public String strVal(int doc) throws IOException { |
| Integer intValue = intVal(doc); |
| return intValueToStringValue(intValue); |
| } |
| |
| @Override |
| public boolean exists(int doc) throws IOException { |
| getValueForDoc(doc); |
| return arr.docID() == doc; |
| } |
| |
| @Override |
| public ValueSourceScorer getRangeScorer(Weight weight, LeafReaderContext readerContext, String lowerVal, String upperVal, boolean includeLower, boolean includeUpper) { |
| Integer lower = stringValueToIntValue(lowerVal); |
| Integer upper = stringValueToIntValue(upperVal); |
| |
| // instead of using separate comparison functions, adjust the endpoints. |
| |
| if (lower == null) { |
| lower = Integer.MIN_VALUE; |
| } else { |
| if (!includeLower && lower < Integer.MAX_VALUE) lower++; |
| } |
| |
| if (upper == null) { |
| upper = Integer.MAX_VALUE; |
| } else { |
| if (!includeUpper && upper > Integer.MIN_VALUE) upper--; |
| } |
| |
| final int ll = lower; |
| final int uu = upper; |
| |
| return new ValueSourceScorer(weight, readerContext, this) { |
| @Override |
| public boolean matches(int doc) throws IOException { |
| if (!exists(doc)) return false; |
| int val = intVal(doc); |
| return val >= ll && val <= uu; |
| } |
| }; |
| } |
| |
| @Override |
| public ValueFiller getValueFiller() { |
| return new ValueFiller() { |
| private final MutableValueInt mval = new MutableValueInt(); |
| |
| @Override |
| public MutableValue getValue() { |
| return mval; |
| } |
| |
| @Override |
| public void fillValue(int doc) throws IOException { |
| mval.value = intVal(doc); |
| mval.exists = arr.docID() == doc; |
| } |
| }; |
| } |
| }; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| if (!super.equals(o)) return false; |
| |
| EnumFieldSource that = (EnumFieldSource) o; |
| |
| if (!enumIntToStringMap.equals(that.enumIntToStringMap)) return false; |
| if (!enumStringToIntMap.equals(that.enumStringToIntMap)) return false; |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = super.hashCode(); |
| result = 31 * result + enumIntToStringMap.hashCode(); |
| result = 31 * result + enumStringToIntMap.hashCode(); |
| return result; |
| } |
| } |
| |