pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / src / java / org / apache / lucene / search / ReqExclScorer.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/ReqExclScorer.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/ReqExclScorer.java
deleted file mode 100644 (file)
index a9d2d04..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/ReqExclScorer.java
+++ /dev/null
@@ -1,120 +0,0 @@
-package org.apache.lucene.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.
- */
-
-import java.io.IOException;
-
-
-/** A Scorer for queries with a required subscorer
- * and an excluding (prohibited) sub DocIdSetIterator.
- * <br>
- * This <code>Scorer</code> implements {@link Scorer#skipTo(int)},
- * and it uses the skipTo() on the given scorers.
- */
-class ReqExclScorer extends Scorer {
-  private Scorer reqScorer;
-  private DocIdSetIterator exclDisi;
-  private int doc = -1;
-
-  /** Construct a <code>ReqExclScorer</code>.
-   * @param reqScorer The scorer that must match, except where
-   * @param exclDisi indicates exclusion.
-   */
-  public ReqExclScorer(Scorer reqScorer, DocIdSetIterator exclDisi) {
-    super(reqScorer.weight);
-    this.reqScorer = reqScorer;
-    this.exclDisi = exclDisi;
-  }
-
-  @Override
-  public int nextDoc() throws IOException {
-    if (reqScorer == null) {
-      return doc;
-    }
-    doc = reqScorer.nextDoc();
-    if (doc == NO_MORE_DOCS) {
-      reqScorer = null; // exhausted, nothing left
-      return doc;
-    }
-    if (exclDisi == null) {
-      return doc;
-    }
-    return doc = toNonExcluded();
-  }
-  
-  /** Advance to non excluded doc.
-   * <br>On entry:
-   * <ul>
-   * <li>reqScorer != null,
-   * <li>exclScorer != null,
-   * <li>reqScorer was advanced once via next() or skipTo()
-   *      and reqScorer.doc() may still be excluded.
-   * </ul>
-   * Advances reqScorer a non excluded required doc, if any.
-   * @return true iff there is a non excluded required doc.
-   */
-  private int toNonExcluded() throws IOException {
-    int exclDoc = exclDisi.docID();
-    int reqDoc = reqScorer.docID(); // may be excluded
-    do {  
-      if (reqDoc < exclDoc) {
-        return reqDoc; // reqScorer advanced to before exclScorer, ie. not excluded
-      } else if (reqDoc > exclDoc) {
-        exclDoc = exclDisi.advance(reqDoc);
-        if (exclDoc == NO_MORE_DOCS) {
-          exclDisi = null; // exhausted, no more exclusions
-          return reqDoc;
-        }
-        if (exclDoc > reqDoc) {
-          return reqDoc; // not excluded
-        }
-      }
-    } while ((reqDoc = reqScorer.nextDoc()) != NO_MORE_DOCS);
-    reqScorer = null; // exhausted, nothing left
-    return NO_MORE_DOCS;
-  }
-
-  @Override
-  public int docID() {
-    return doc;
-  }
-
-  /** Returns the score of the current document matching the query.
-   * Initially invalid, until {@link #nextDoc()} is called the first time.
-   * @return The score of the required scorer.
-   */
-  @Override
-  public float score() throws IOException {
-    return reqScorer.score(); // reqScorer may be null when next() or skipTo() already return false
-  }
-  
-  @Override
-  public int advance(int target) throws IOException {
-    if (reqScorer == null) {
-      return doc = NO_MORE_DOCS;
-    }
-    if (exclDisi == null) {
-      return doc = reqScorer.advance(target);
-    }
-    if (reqScorer.advance(target) == NO_MORE_DOCS) {
-      reqScorer = null;
-      return doc = NO_MORE_DOCS;
-    }
-    return doc = toNonExcluded();
-  }
-}