pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / analyzers / common / src / java / org / apache / lucene / analysis / sinks / DateRecognizerSinkFilter.java

diff --git a/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/sinks/DateRecognizerSinkFilter.java b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/sinks/DateRecognizerSinkFilter.java
new file mode 100644 (file)
index 0000000..e4a31d7
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+++ b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/sinks/DateRecognizerSinkFilter.java
@@ -0,0 +1,68 @@
+package org.apache.lucene.analysis.sinks;
+
+/**
+ * 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.text.DateFormat;
+import java.text.ParseException;
+import java.util.Date;
+
+import org.apache.lucene.analysis.TeeSinkTokenFilter.SinkFilter;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+import org.apache.lucene.util.AttributeSource;
+
+/**
+ * Attempts to parse the {@link org.apache.lucene.analysis.Token#termBuffer()} as a Date using a {@link java.text.DateFormat}.
+ * If the value is a Date, it will add it to the sink.
+ * <p/> 
+ *
+ **/
+public class DateRecognizerSinkFilter extends SinkFilter {
+  public static final String DATE_TYPE = "date";
+
+  protected DateFormat dateFormat;
+  protected CharTermAttribute termAtt;
+  
+  /**
+   * Uses {@link java.text.SimpleDateFormat#getDateInstance()} as the {@link java.text.DateFormat} object.
+   */
+  public DateRecognizerSinkFilter() {
+    this(DateFormat.getDateInstance());
+  }
+  
+  public DateRecognizerSinkFilter(DateFormat dateFormat) {
+    this.dateFormat = dateFormat; 
+  }
+
+  @Override
+  public boolean accept(AttributeSource source) {
+    if (termAtt == null) {
+      termAtt = source.addAttribute(CharTermAttribute.class);
+    }
+    try {
+      Date date = dateFormat.parse(termAtt.toString());//We don't care about the date, just that we can parse it as a date
+      if (date != null) {
+        return true;
+      }
+    } catch (ParseException e) {
+  
+    }
+    
+    return false;
+  }
+
+}