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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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package org.apache.solr.search.function;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.search.Explanation;
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import org.apache.lucene.search.Scorer;
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import java.io.IOException;
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/** @lucene.internal */
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public class ValueSourceScorer extends Scorer {
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protected IndexReader reader;
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protected final int maxDoc;
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protected final DocValues values;
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protected boolean checkDeletes;
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protected ValueSourceScorer(IndexReader reader, DocValues values) {
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this.maxDoc = reader.maxDoc();
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setCheckDeletes(true);
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public IndexReader getReader() {
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public void setCheckDeletes(boolean checkDeletes) {
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this.checkDeletes = checkDeletes && reader.hasDeletions();
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public boolean matches(int doc) {
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return (!checkDeletes || !reader.isDeleted(doc)) && matchesValue(doc);
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public boolean matchesValue(int doc) {
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public int nextDoc() throws IOException {
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if (doc >= maxDoc) return doc = NO_MORE_DOCS;
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if (matches(doc)) return doc;
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public int advance(int target) throws IOException {
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// also works fine when target==NO_MORE_DOCS
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public boolean next() {
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if (doc >= maxDoc) return false;
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if (matches(doc)) return true;
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public boolean skipTo(int target) {
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public float score() throws IOException {
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return values.floatVal(doc);
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public Explanation explain(int doc) throws IOException {
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return values.explain(doc);