pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / facet / src / java / org / apache / lucene / facet / search / cache / CategoryListCache.java

diff --git a/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/search/cache/CategoryListCache.java b/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/search/cache/CategoryListCache.java
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+package org.apache.lucene.facet.search.cache;
+
+import java.io.IOException;
+import java.util.HashMap;
+
+import org.apache.lucene.index.IndexReader;
+
+import org.apache.lucene.facet.index.params.CategoryListParams;
+import org.apache.lucene.facet.index.params.FacetIndexingParams;
+import org.apache.lucene.facet.taxonomy.TaxonomyReader;
+
+/**
+ * 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.
+ */
+
+/**
+ * Cache for {@link CategoryListData}, per {@link CategoryListParams}. 
+ * 
+ * @lucene.experimental
+ */
+public class CategoryListCache {
+
+  private HashMap<CategoryListParams, CategoryListData> 
+    cldMap = new HashMap<CategoryListParams,CategoryListData>();
+
+  /**
+   * Fetch the cached {@link CategoryListData} for a given {@link CategoryListParams}.
+   */
+  public CategoryListData get(CategoryListParams clp) {
+    return cldMap.get(clp);
+  }
+  
+  /**
+   * Register a pre-computed {@link CategoryListData}.
+   */
+  public void register(CategoryListParams clp, CategoryListData clData) {
+    cldMap.put(clp,clData);
+  }
+  
+  /**
+   * Load and register {@link CategoryListData}.
+   */
+  public void loadAndRegister(CategoryListParams clp, 
+      IndexReader reader, TaxonomyReader taxo, FacetIndexingParams iparams) throws IOException {
+    CategoryListData clData = new CategoryListData(reader, taxo, iparams, clp);
+    register(clp,clData);
+  }
+}