pylucene 3.5.0-3

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

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/CachingSpanFilter.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/CachingSpanFilter.java
deleted file mode 100644 (file)
index 79bd609..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/CachingSpanFilter.java
+++ /dev/null
@@ -1,109 +0,0 @@
-package org.apache.lucene.search;
-/**
- * Copyright 2005 The Apache Software Foundation
- *
- * Licensed 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 java.io.IOException;
-
-/**
- * Wraps another SpanFilter's result and caches it.  The purpose is to allow
- * filters to simply filter, and then wrap with this class to add caching.
- */
-public class CachingSpanFilter extends SpanFilter {
-  private SpanFilter filter;
-
-  /**
-   * A transient Filter cache (package private because of test)
-   */
-  private final CachingWrapperFilter.FilterCache<SpanFilterResult> cache;
-
-  /**
-   * New deletions always result in a cache miss, by default
-   * ({@link CachingWrapperFilter.DeletesMode#RECACHE}.
-   * @param filter Filter to cache results of
-   */
-  public CachingSpanFilter(SpanFilter filter) {
-    this(filter, CachingWrapperFilter.DeletesMode.RECACHE);
-  }
-
-  /**
-   * @param filter Filter to cache results of
-   * @param deletesMode See {@link CachingWrapperFilter.DeletesMode}
-   */
-  public CachingSpanFilter(SpanFilter filter, CachingWrapperFilter.DeletesMode deletesMode) {
-    this.filter = filter;
-    if (deletesMode == CachingWrapperFilter.DeletesMode.DYNAMIC) {
-      throw new IllegalArgumentException("DeletesMode.DYNAMIC is not supported");
-    }
-    this.cache = new CachingWrapperFilter.FilterCache<SpanFilterResult>(deletesMode) {
-      @Override
-      protected SpanFilterResult mergeDeletes(final IndexReader reader, final SpanFilterResult value) {
-        throw new IllegalStateException("DeletesMode.DYNAMIC is not supported");
-      }
-    };
-  }
-
-  @Override
-  public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
-    SpanFilterResult result = getCachedResult(reader);
-    return result != null ? result.getDocIdSet() : null;
-  }
-  
-  // for testing
-  int hitCount, missCount;
-
-  private SpanFilterResult getCachedResult(IndexReader reader) throws IOException {
-
-    final Object coreKey = reader.getCoreCacheKey();
-    final Object delCoreKey = reader.hasDeletions() ? reader.getDeletesCacheKey() : coreKey;
-
-    SpanFilterResult result = cache.get(reader, coreKey, delCoreKey);
-    if (result != null) {
-      hitCount++;
-      return result;
-    }
-
-    missCount++;
-    result = filter.bitSpans(reader);
-
-    cache.put(coreKey, delCoreKey, result);
-    return result;
-  }
-
-
-  @Override
-  public SpanFilterResult bitSpans(IndexReader reader) throws IOException {
-    return getCachedResult(reader);
-  }
-
-  @Override
-  public String toString() {
-    return "CachingSpanFilter("+filter+")";
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof CachingSpanFilter)) return false;
-    return this.filter.equals(((CachingSpanFilter)o).filter);
-  }
-
-  @Override
-  public int hashCode() {
-    return filter.hashCode() ^ 0x1117BF25;
-  }
-}