+++ /dev/null
-/** 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.tier;
-
-import java.util.Map;
-import java.util.WeakHashMap;
-import java.util.HashMap;
-import java.io.IOException;
-import java.io.ObjectInputStream;
-
-import org.apache.lucene.search.Filter;
-import org.apache.lucene.spatial.tier.DistanceHandler.Precision;
-
-/**
- * <p><font color="red"><b>NOTE:</b> This API is still in
- * flux and might change in incompatible ways in the next
- * release.</font>
- */
-public abstract class DistanceFilter extends Filter {
-
- final protected Filter startingFilter;
- protected Precision precise;
- protected Map<Integer,Double> distances;
- protected double distance;
-
- protected int nextDocBase;
- protected transient WeakHashMap<String,Double> distanceLookupCache;
-
- /** Filters the startingFilter by precise distance
- * checking filter */
- public DistanceFilter(Filter startingFilter, double distance) {
- if (startingFilter == null) {
- throw new IllegalArgumentException("please provide a non-null startingFilter; you can use QueryWrapperFilter(MatchAllDocsQuery) as a no-op filter");
- }
- this.startingFilter = startingFilter;
- this.distance = distance;
-
- // NOTE: neither of the distance filters use precision
- // now - if we turn that on, we'll need to pass top
- // reader into here
- // setPrecision(reader.maxDoc());
-
- /* store calculated distances for reuse by other components */
- distances = new HashMap<Integer,Double>();
-
- // create an intermediate cache to avoid recomputing
- // distances for the same point
- // TODO: Why is this a WeakHashMap?
- distanceLookupCache = new WeakHashMap<String,Double>();
- }
-
- /** needed for deserialization, because the cache is transient */
- private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
- stream.defaultReadObject();
- distanceLookupCache = new WeakHashMap<String,Double>();
- }
-
- public Map<Integer,Double> getDistances(){
- return distances;
- }
-
- public Double getDistance(int docid){
- return distances.get(docid);
- }
-
- public void setDistances(Map<Integer, Double> distances) {
- this.distances = distances;
- }
-
- /** You must call this before re-using this DistanceFilter
- * across searches */
- public void reset() {
- nextDocBase = 0;
- }
-
- /** Returns true if <code>o</code> is equal to this. */
- @Override
- public abstract boolean equals(Object o);
-
- /** Returns a hash code value for this object.*/
- @Override
- public abstract int hashCode();
-
- /*
- private void setPrecision(int maxDocs) {
- precise = Precision.EXACT;
-
- if (maxDocs > 1000 && distance > 10) {
- precise = Precision.TWENTYFEET;
- }
-
- if (maxDocs > 10000 && distance > 10){
- precise = Precision.TWOHUNDREDFEET;
- }
- }
- */
-}