X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/function/ValueSourceQuery.java diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/function/ValueSourceQuery.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/function/ValueSourceQuery.java deleted file mode 100644 index 3cdb25d..0000000 --- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/function/ValueSourceQuery.java +++ /dev/null @@ -1,195 +0,0 @@ -package org.apache.lucene.search.function; - -/** - * 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 org.apache.lucene.index.IndexReader; -import org.apache.lucene.index.Term; -import org.apache.lucene.index.TermDocs; -import org.apache.lucene.search.*; -import org.apache.lucene.util.ToStringUtils; - -import java.io.IOException; -import java.util.Set; - -/** - * Expert: A Query that sets the scores of document to the - * values obtained from a {@link org.apache.lucene.search.function.ValueSource ValueSource}. - *

- * This query provides a score for each and every undeleted document in the index. - *

- * The value source can be based on a (cached) value of an indexed field, but it - * can also be based on an external source, e.g. values read from an external database. - *

- * Score is set as: Score(doc,query) = query.getBoost()2 * valueSource(doc). - * - * @lucene.experimental - */ -public class ValueSourceQuery extends Query { - ValueSource valSrc; - - /** - * Create a value source query - * @param valSrc provides the values defines the function to be used for scoring - */ - public ValueSourceQuery(ValueSource valSrc) { - this.valSrc=valSrc; - } - - /*(non-Javadoc) @see org.apache.lucene.search.Query#rewrite(org.apache.lucene.index.IndexReader) */ - @Override - public Query rewrite(IndexReader reader) throws IOException { - return this; - } - - /*(non-Javadoc) @see org.apache.lucene.search.Query#extractTerms(java.util.Set) */ - @Override - public void extractTerms(Set terms) { - // no terms involved here - } - - class ValueSourceWeight extends Weight { - Similarity similarity; - float queryNorm; - float queryWeight; - - public ValueSourceWeight(Searcher searcher) { - this.similarity = getSimilarity(searcher); - } - - /*(non-Javadoc) @see org.apache.lucene.search.Weight#getQuery() */ - @Override - public Query getQuery() { - return ValueSourceQuery.this; - } - - /*(non-Javadoc) @see org.apache.lucene.search.Weight#getValue() */ - @Override - public float getValue() { - return queryWeight; - } - - /*(non-Javadoc) @see org.apache.lucene.search.Weight#sumOfSquaredWeights() */ - @Override - public float sumOfSquaredWeights() throws IOException { - queryWeight = getBoost(); - return queryWeight * queryWeight; - } - - /*(non-Javadoc) @see org.apache.lucene.search.Weight#normalize(float) */ - @Override - public void normalize(float norm) { - this.queryNorm = norm; - queryWeight *= this.queryNorm; - } - - @Override - public Scorer scorer(IndexReader reader, boolean scoreDocsInOrder, boolean topScorer) throws IOException { - return new ValueSourceScorer(similarity, reader, this); - } - - /*(non-Javadoc) @see org.apache.lucene.search.Weight#explain(org.apache.lucene.index.IndexReader, int) */ - @Override - public Explanation explain(IndexReader reader, int doc) throws IOException { - DocValues vals = valSrc.getValues(reader); - float sc = queryWeight * vals.floatVal(doc); - - Explanation result = new ComplexExplanation( - true, sc, ValueSourceQuery.this.toString() + ", product of:"); - - result.addDetail(vals.explain(doc)); - result.addDetail(new Explanation(getBoost(), "boost")); - result.addDetail(new Explanation(queryNorm,"queryNorm")); - return result; - } - } - - /** - * A scorer that (simply) matches all documents, and scores each document with - * the value of the value source in effect. As an example, if the value source - * is a (cached) field source, then value of that field in that document will - * be used. (assuming field is indexed for this doc, with a single token.) - */ - private class ValueSourceScorer extends Scorer { - private final float qWeight; - private final DocValues vals; - private final TermDocs termDocs; - private int doc = -1; - - // constructor - private ValueSourceScorer(Similarity similarity, IndexReader reader, ValueSourceWeight w) throws IOException { - super(similarity,w); - qWeight = w.getValue(); - // this is when/where the values are first created. - vals = valSrc.getValues(reader); - termDocs = reader.termDocs(null); - } - - @Override - public int nextDoc() throws IOException { - return doc = termDocs.next() ? termDocs.doc() : NO_MORE_DOCS; - } - - @Override - public int docID() { - return doc; - } - - @Override - public int advance(int target) throws IOException { - return doc = termDocs.skipTo(target) ? termDocs.doc() : NO_MORE_DOCS; - } - - /*(non-Javadoc) @see org.apache.lucene.search.Scorer#score() */ - @Override - public float score() throws IOException { - return qWeight * vals.floatVal(termDocs.doc()); - } - } - - @Override - public Weight createWeight(Searcher searcher) { - return new ValueSourceQuery.ValueSourceWeight(searcher); - } - - @Override - public String toString(String field) { - return valSrc.toString() + ToStringUtils.boost(getBoost()); - } - - /** Returns true if o is equal to this. */ - @Override - public boolean equals(Object o) { - if (this == o) - return true; - if (!super.equals(o)) - return false; - if (getClass() != o.getClass()) { - return false; - } - ValueSourceQuery other = (ValueSourceQuery)o; - return this.getBoost() == other.getBoost() - && this.valSrc.equals(other.valSrc); - } - - /** Returns a hash code value for this object. */ - @Override - public int hashCode() { - return (getClass().hashCode() + valSrc.hashCode()) ^ Float.floatToIntBits(getBoost()); - } - -}