pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / facet / src / java / org / apache / lucene / facet / enhancements / association / AssociationListTokenizer.java

diff --git a/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/enhancements/association/AssociationListTokenizer.java b/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/enhancements/association/AssociationListTokenizer.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/enhancements/association/AssociationListTokenizer.java
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+package org.apache.lucene.facet.enhancements.association;
+
+import java.io.IOException;
+
+import org.apache.lucene.analysis.TokenStream;
+
+import org.apache.lucene.facet.enhancements.CategoryEnhancement;
+import org.apache.lucene.facet.enhancements.params.EnhancementsIndexingParams;
+import org.apache.lucene.facet.index.CategoryListPayloadStream;
+import org.apache.lucene.facet.index.attributes.OrdinalProperty;
+import org.apache.lucene.facet.index.streaming.CategoryListTokenizer;
+import org.apache.lucene.util.encoding.SimpleIntEncoder;
+
+/**
+ * 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.
+ */
+
+/**
+ * Tokenizer for associations of a category
+ * 
+ * @lucene.experimental
+ */
+public class AssociationListTokenizer extends CategoryListTokenizer {
+
+  protected CategoryListPayloadStream payloadStream;
+
+  private String categoryListTermText;
+
+  public AssociationListTokenizer(TokenStream input,
+      EnhancementsIndexingParams indexingParams, CategoryEnhancement enhancement) {
+    super(input, indexingParams);
+    categoryListTermText = enhancement.getCategoryListTermText();
+  }
+
+  @Override
+  protected void handleStartOfInput() throws IOException {
+    payloadStream = null;
+  }
+
+  @Override
+  public final boolean incrementToken() throws IOException {
+    if (input.incrementToken()) {
+      if (categoryAttribute != null) {
+        AssociationProperty associationProperty = AssociationEnhancement
+            .getAssociationProperty(categoryAttribute);
+        if (associationProperty != null
+            && associationProperty.hasBeenSet()) {
+          OrdinalProperty ordinalProperty = (OrdinalProperty) categoryAttribute
+              .getProperty(OrdinalProperty.class);
+          if (ordinalProperty == null) {
+            throw new IOException(
+                "Error: Association without ordinal");
+          }
+
+          if (payloadStream == null) {
+            payloadStream = new CategoryListPayloadStream(
+                new SimpleIntEncoder());
+          }
+          payloadStream.appendIntToStream(ordinalProperty
+              .getOrdinal());
+          payloadStream.appendIntToStream(associationProperty
+              .getAssociation());
+        }
+      }
+      return true;
+    }
+    if (payloadStream != null) {
+      termAttribute.setEmpty().append(categoryListTermText);
+      payload.setData(payloadStream.convertStreamToByteArray());
+      payloadAttribute.setPayload(payload);
+      payloadStream = null;
+      return true;
+    }
+    return false;
+  }
+
+}