package org.apache.lucene.spatial.prefix;
/*
* 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.
*/
import com.spatial4j.core.shape.Shape;
import org.apache.lucene.index.AtomicReader;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.DocsEnum;
import org.apache.lucene.index.Terms;
import org.apache.lucene.index.TermsEnum;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.search.Filter;
import org.apache.lucene.spatial.prefix.tree.SpatialPrefixTree;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.FixedBitSet;
import java.io.IOException;
/**
* Base class for Lucene Filters on SpatialPrefixTree fields.
*
* @lucene.experimental
*/
public abstract class AbstractPrefixTreeFilter extends Filter {
protected final Shape queryShape;
protected final String fieldName;
protected final SpatialPrefixTree grid;//not in equals/hashCode since it's implied for a specific field
protected final int detailLevel;
public AbstractPrefixTreeFilter(Shape queryShape, String fieldName, SpatialPrefixTree grid, int detailLevel) {
this.queryShape = queryShape;
this.fieldName = fieldName;
this.grid = grid;
this.detailLevel = detailLevel;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!getClass().equals(o.getClass())) return false;
AbstractPrefixTreeFilter that = (AbstractPrefixTreeFilter) o;
if (detailLevel != that.detailLevel) return false;
if (!fieldName.equals(that.fieldName)) return false;
if (!queryShape.equals(that.queryShape)) return false;
return true;
}
@Override
public int hashCode() {
int result = queryShape.hashCode();
result = 31 * result + fieldName.hashCode();
result = 31 * result + detailLevel;
return result;
}
/** Holds transient state and docid collecting utility methods as part of
* traversing a {@link TermsEnum}. */
public abstract class BaseTermsEnumTraverser {
protected final AtomicReaderContext context;
protected Bits acceptDocs;
protected final int maxDoc;
protected TermsEnum termsEnum;//remember to check for null in getDocIdSet
protected DocsEnum docsEnum;
public BaseTermsEnumTraverser(AtomicReaderContext context, Bits acceptDocs) throws IOException {
this.context = context;
AtomicReader reader = context.reader();
this.acceptDocs = acceptDocs;
this.maxDoc = reader.maxDoc();
Terms terms = reader.terms(fieldName);
if (terms != null)
this.termsEnum = terms.iterator(null);
}
protected void collectDocs(FixedBitSet bitSet) throws IOException {
//WARN: keep this specialization in sync
assert termsEnum != null;
docsEnum = termsEnum.docs(acceptDocs, docsEnum, DocsEnum.FLAG_NONE);
int docid;
while ((docid = docsEnum.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
bitSet.set(docid);
}
}
/* Eventually uncomment when needed.
protected void collectDocs(Collector collector) throws IOException {
//WARN: keep this specialization in sync
assert termsEnum != null;
docsEnum = termsEnum.docs(acceptDocs, docsEnum, DocsEnum.FLAG_NONE);
int docid;
while ((docid = docsEnum.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
collector.collect(docid);
}
}
public abstract class Collector {
abstract void collect(int docid) throws IOException;
}
*/
}
}