pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / queryparser / src / java / org / apache / lucene / queryParser / standard / config / NumberDateFormat.java

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/config/NumberDateFormat.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/config/NumberDateFormat.java
new file mode 100644 (file)
index 0000000..e68c763
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/config/NumberDateFormat.java
@@ -0,0 +1,71 @@
+package org.apache.lucene.queryParser.standard.config;
+
+/**
+ * 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.FieldPosition;
+import java.text.Format;
+import java.text.NumberFormat;
+import java.text.ParsePosition;
+import java.util.Date;
+
+/**
+ * This {@link Format} parses {@link Long} into date strings and vice-versa. It
+ * uses the given {@link DateFormat} to parse and format dates, but before, it
+ * converts {@link Long} to {@link Date} objects or vice-versa.
+ */
+public class NumberDateFormat extends NumberFormat {
+  
+  private static final long serialVersionUID = 964823936071308283L;
+  
+  final private DateFormat dateFormat;
+  
+  /**
+   * Constructs a {@link NumberDateFormat} object using the given {@link DateFormat}.
+   * 
+   * @param dateFormat {@link DateFormat} used to parse and format dates
+   */
+  public NumberDateFormat(DateFormat dateFormat) {
+    this.dateFormat = dateFormat;
+  }
+  
+  @Override
+  public StringBuffer format(double number, StringBuffer toAppendTo,
+      FieldPosition pos) {
+    return dateFormat.format(new Date((long) number), toAppendTo, pos);
+  }
+  
+  @Override
+  public StringBuffer format(long number, StringBuffer toAppendTo,
+      FieldPosition pos) {
+    return dateFormat.format(new Date(number), toAppendTo, pos);
+  }
+  
+  @Override
+  public Number parse(String source, ParsePosition parsePosition) {
+    final Date date = dateFormat.parse(source, parsePosition);
+    return (date == null) ? null : date.getTime();
+  }
+  
+  @Override
+  public StringBuffer format(Object number, StringBuffer toAppendTo,
+      FieldPosition pos) {
+    return dateFormat.format(number, toAppendTo, pos);
+  }
+  
+}