| /* |
| * 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.spatial.bbox; |
| |
| import com.spatial4j.core.shape.Rectangle; |
| import org.apache.lucene.index.LeafReader; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.DocValues; |
| import org.apache.lucene.index.NumericDocValues; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.search.Explanation; |
| import org.apache.lucene.util.Bits; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| /** |
| * A ValueSource in which the indexed Rectangle is returned from |
| * {@link org.apache.lucene.queries.function.FunctionValues#objectVal(int)}. |
| * |
| * @lucene.internal |
| */ |
| class BBoxValueSource extends ValueSource { |
| |
| private final BBoxStrategy strategy; |
| |
| public BBoxValueSource(BBoxStrategy strategy) { |
| this.strategy = strategy; |
| } |
| |
| @Override |
| public String description() { |
| return "bboxShape(" + strategy.getFieldName() + ")"; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| LeafReader reader = readerContext.reader(); |
| final NumericDocValues minX = DocValues.getNumeric(reader, strategy.field_minX); |
| final NumericDocValues minY = DocValues.getNumeric(reader, strategy.field_minY); |
| final NumericDocValues maxX = DocValues.getNumeric(reader, strategy.field_maxX); |
| final NumericDocValues maxY = DocValues.getNumeric(reader, strategy.field_maxY); |
| |
| final Bits validBits = DocValues.getDocsWithField(reader, strategy.field_minX);//could have chosen any field |
| //reused |
| final Rectangle rect = strategy.getSpatialContext().makeRectangle(0,0,0,0); |
| |
| return new FunctionValues() { |
| @Override |
| public Object objectVal(int doc) { |
| if (!validBits.get(doc)) { |
| return null; |
| } else { |
| rect.reset( |
| Double.longBitsToDouble(minX.get(doc)), Double.longBitsToDouble(maxX.get(doc)), |
| Double.longBitsToDouble(minY.get(doc)), Double.longBitsToDouble(maxY.get(doc))); |
| return rect; |
| } |
| } |
| |
| @Override |
| public String strVal(int doc) {//TODO support WKT output once Spatial4j does |
| Object v = objectVal(doc); |
| return v == null ? null : v.toString(); |
| } |
| |
| @Override |
| public boolean exists(int doc) { |
| return validBits.get(doc); |
| } |
| |
| @Override |
| public Explanation explain(int doc) { |
| return Explanation.match(Float.NaN, toString(doc)); |
| } |
| |
| @Override |
| public String toString(int doc) { |
| return description() + '=' + strVal(doc); |
| } |
| }; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| BBoxValueSource that = (BBoxValueSource) o; |
| |
| if (!strategy.equals(that.strategy)) return false; |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() { |
| return strategy.hashCode(); |
| } |
| } |