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SOLR-3240: add "spellcheck.collateMaxCollectDocs" for estimating coll…
…ation hit-counts. git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1479638 13f79535-47bb-0310-9956-ffa450edef68
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85 changes: 85 additions & 0 deletions
85
solr/core/src/java/org/apache/solr/search/EarlyTerminatingCollector.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package org.apache.solr.search; | ||
|
|
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| /** | ||
| * 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 java.io.IOException; | ||
|
|
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| import org.apache.lucene.index.AtomicReaderContext; | ||
| import org.apache.lucene.search.Collector; | ||
| import org.apache.lucene.search.Scorer; | ||
| /** | ||
| * <p> | ||
| * A wrapper {@link Collector} that throws {@link EarlyTerminatingCollectorException}) | ||
| * once a specified maximum number of documents are collected. | ||
| * </p> | ||
| */ | ||
| public class EarlyTerminatingCollector extends Collector { | ||
| private int numCollected; | ||
| private int lastDocId = -1; | ||
| private int maxDocsToCollect; | ||
| private Collector delegate; | ||
|
|
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| /** | ||
| * <p> | ||
| * Wraps a {@link Collector}, throwing {@link EarlyTerminatingCollectorException} | ||
| * once the specified maximum is reached. | ||
| * </p> | ||
| * @param delegate - the Collector to wrap. | ||
| * @param maxDocsToCollect - the maximum number of documents to Collect | ||
| * | ||
| */ | ||
| public EarlyTerminatingCollector(Collector delegate, int maxDocsToCollect) { | ||
| this.delegate = delegate; | ||
| this.maxDocsToCollect = maxDocsToCollect; | ||
| } | ||
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| @Override | ||
| public boolean acceptsDocsOutOfOrder() { | ||
| return delegate.acceptsDocsOutOfOrder(); | ||
| } | ||
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| @Override | ||
| public void collect(int doc) throws IOException { | ||
| delegate.collect(doc); | ||
| lastDocId = doc; | ||
| numCollected++; | ||
| if(numCollected==maxDocsToCollect) { | ||
| throw new EarlyTerminatingCollectorException(numCollected, lastDocId); | ||
| } | ||
| } | ||
| @Override | ||
| public void setNextReader(AtomicReaderContext context) throws IOException { | ||
| delegate.setNextReader(context); | ||
| } | ||
| @Override | ||
| public void setScorer(Scorer scorer) throws IOException { | ||
| delegate.setScorer(scorer); | ||
| } | ||
| public int getNumCollected() { | ||
| return numCollected; | ||
| } | ||
| public void setNumCollected(int numCollected) { | ||
| this.numCollected = numCollected; | ||
| } | ||
| public int getLastDocId() { | ||
| return lastDocId; | ||
| } | ||
| public void setLastDocId(int lastDocId) { | ||
| this.lastDocId = lastDocId; | ||
| } | ||
| } |
45 changes: 45 additions & 0 deletions
45
solr/core/src/java/org/apache/solr/search/EarlyTerminatingCollectorException.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| package org.apache.solr.search; | ||
|
|
||
| /** | ||
| * 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. | ||
| */ | ||
| /** | ||
| * Thrown by {@link EarlyTerminatingCollector} when the maximum to abort | ||
| * the scoring / collection process early, when the specified maximum number | ||
| * of documents were collected. | ||
| */ | ||
| public class EarlyTerminatingCollectorException extends RuntimeException { | ||
| private static final long serialVersionUID = 5939241340763428118L; | ||
| private int lastDocId = -1; | ||
| private int numberCollected; | ||
|
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| public EarlyTerminatingCollectorException(int numberCollected, int lastDocId) { | ||
| this.numberCollected = numberCollected; | ||
| this.lastDocId = lastDocId; | ||
| } | ||
| public int getLastDocId() { | ||
| return lastDocId; | ||
| } | ||
| public void setLastDocId(int lastDocId) { | ||
| this.lastDocId = lastDocId; | ||
| } | ||
| public int getNumberCollected() { | ||
| return numberCollected; | ||
| } | ||
| public void setNumberCollected(int numberCollected) { | ||
| this.numberCollected = numberCollected; | ||
| } | ||
| } |
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