| /* |
| * 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.search.join; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| import org.apache.lucene.index.NumericDocValues; |
| import org.apache.lucene.index.SortedDocValues; |
| import org.apache.lucene.search.ConjunctionDISI; |
| import org.apache.lucene.search.DocIdSetIterator; |
| import org.apache.lucene.search.join.BlockJoinSelector.Type; |
| import org.apache.lucene.util.BitSet; |
| import org.apache.lucene.util.BytesRef; |
| |
| class ToParentDocValues extends DocIdSetIterator { |
| |
| interface Accumulator{ |
| void reset() throws IOException; |
| void increment() throws IOException; |
| } |
| |
| private static final class SortedDVs extends SortedDocValues implements Accumulator{ |
| private final SortedDocValues values; |
| private final BlockJoinSelector.Type selection; |
| private int ord = -1; |
| private final ToParentDocValues iter; |
| |
| private SortedDVs(SortedDocValues values, BlockJoinSelector.Type selection, BitSet parents, DocIdSetIterator children) { |
| this.values = values; |
| this.selection = selection; |
| this.iter = new ToParentDocValues(values,parents, children, this); |
| } |
| |
| @Override |
| public int docID() { |
| return iter.docID(); |
| } |
| |
| @Override |
| public |
| void reset() throws IOException { |
| ord = values.ordValue(); |
| } |
| |
| @Override |
| public |
| void increment() throws IOException { |
| if (selection == BlockJoinSelector.Type.MIN) { |
| ord = Math.min(ord, values.ordValue()); |
| } else if (selection == BlockJoinSelector.Type.MAX) { |
| ord = Math.max(ord, values.ordValue()); |
| } else { |
| throw new AssertionError(); |
| } |
| } |
| |
| @Override |
| public int nextDoc() throws IOException { |
| return iter.nextDoc(); |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| return iter.advance(target); |
| } |
| |
| @Override |
| public boolean advanceExact(int targetParentDocID) throws IOException { |
| return iter.advanceExact(targetParentDocID); |
| } |
| |
| @Override |
| public int ordValue() { |
| return ord; |
| } |
| |
| @Override |
| public BytesRef lookupOrd(int ord) throws IOException { |
| return values.lookupOrd(ord); |
| } |
| |
| @Override |
| public int getValueCount() { |
| return values.getValueCount(); |
| } |
| |
| @Override |
| public long cost() { |
| return values.cost(); |
| } |
| } |
| |
| static private final class NumDV extends NumericDocValues implements Accumulator{ |
| private final NumericDocValues values; |
| private long value; |
| private final BlockJoinSelector.Type selection; |
| |
| private final ToParentDocValues iter; |
| |
| private NumDV(NumericDocValues values, BlockJoinSelector.Type selection, BitSet parents, DocIdSetIterator children) { |
| this.values = values; |
| this.selection = selection; |
| iter = new ToParentDocValues(values, parents, children, this); |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| value = values.longValue(); |
| } |
| |
| @Override |
| public void increment() throws IOException { |
| switch (selection) { |
| case MIN: |
| value = Math.min(value, values.longValue()); |
| break; |
| case MAX: |
| value = Math.max(value, values.longValue()); |
| break; |
| default: |
| throw new AssertionError(); |
| } |
| } |
| |
| @Override |
| public int nextDoc() throws IOException { |
| return iter.nextDoc(); |
| } |
| |
| @Override |
| public int advance(int targetParentDocID) throws IOException { |
| return iter.advance(targetParentDocID); |
| } |
| |
| @Override |
| public boolean advanceExact(int targetParentDocID) throws IOException { |
| return iter.advanceExact(targetParentDocID); |
| } |
| |
| @Override |
| public long longValue() { |
| return value; |
| } |
| |
| @Override |
| public int docID() { |
| return iter.docID(); |
| } |
| |
| @Override |
| public long cost() { |
| return values.cost(); |
| } |
| } |
| |
| private ToParentDocValues(DocIdSetIterator values, BitSet parents, DocIdSetIterator children, Accumulator collect) { |
| this.parents = parents; |
| childWithValues = ConjunctionDISI.intersectIterators(Arrays.asList(children, values)); |
| this.collector = collect; |
| } |
| |
| |
| final private BitSet parents; |
| private int docID = -1; |
| final private Accumulator collector; |
| boolean seen=false; |
| private DocIdSetIterator childWithValues; |
| |
| @Override |
| public int docID() { |
| return docID; |
| } |
| |
| @Override |
| public int nextDoc() throws IOException { |
| assert docID != NO_MORE_DOCS; |
| |
| assert childWithValues.docID()!=docID || docID==-1; |
| if (childWithValues.docID()<docID || docID==-1) { |
| childWithValues.nextDoc(); |
| } |
| if (childWithValues.docID() == NO_MORE_DOCS) { |
| docID = NO_MORE_DOCS; |
| return docID; |
| } |
| |
| |
| assert parents.get(childWithValues.docID()) == false; |
| |
| int nextParentDocID = parents.nextSetBit(childWithValues.docID()); |
| collector.reset(); |
| seen=true; |
| |
| while (true) { |
| int childDocID = childWithValues.nextDoc(); |
| assert childDocID != nextParentDocID; |
| if (childDocID > nextParentDocID) { |
| break; |
| } |
| collector.increment(); |
| } |
| |
| docID = nextParentDocID; |
| |
| return docID; |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| if (target >= parents.length()) { |
| docID = NO_MORE_DOCS; |
| return docID; |
| } |
| if (target == 0) { |
| assert docID() == -1; |
| return nextDoc(); |
| } |
| int prevParentDocID = parents.prevSetBit(target-1); |
| if (childWithValues.docID() <= prevParentDocID) { |
| childWithValues.advance(prevParentDocID+1); |
| } |
| return nextDoc(); |
| } |
| |
| //@Override |
| public boolean advanceExact(int targetParentDocID) throws IOException { |
| if (targetParentDocID < docID) { |
| throw new IllegalArgumentException("target must be after the current document: current=" + docID + " target=" + targetParentDocID); |
| } |
| int previousDocId = docID; |
| docID = targetParentDocID; |
| if (targetParentDocID == previousDocId) { |
| return seen;//ord != -1; rlly??? |
| } |
| docID = targetParentDocID; |
| seen =false; |
| //ord = -1; |
| if (parents.get(targetParentDocID) == false) { |
| return false; |
| } |
| int prevParentDocId = docID == 0 ? -1 : parents.prevSetBit(docID - 1); |
| int childDoc = childWithValues.docID(); |
| if (childDoc <= prevParentDocId) { |
| childDoc = childWithValues.advance(prevParentDocId + 1); |
| } |
| if (childDoc >= docID) { |
| return false; |
| } |
| |
| if (childWithValues.docID() < docID) { |
| collector.reset(); |
| seen=true; |
| childWithValues.nextDoc(); |
| } |
| |
| if (seen == false) { |
| return false; |
| } |
| |
| for (int doc = childWithValues.docID(); doc < docID; doc = childWithValues.nextDoc()) { |
| collector.increment(); |
| } |
| return true; |
| } |
| |
| @Override |
| public long cost() { |
| return 0; |
| } |
| |
| static NumericDocValues wrap(NumericDocValues values, Type selection, BitSet parents2, |
| DocIdSetIterator children) { |
| return new ToParentDocValues.NumDV(values,selection, parents2, children); |
| } |
| |
| static SortedDocValues wrap(SortedDocValues values, Type selection, BitSet parents2, |
| DocIdSetIterator children) { |
| return new ToParentDocValues.SortedDVs(values, selection, parents2, children); |
| } |
| |
| } |