pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / analysis / NormalizeCharMap.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/NormalizeCharMap.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/NormalizeCharMap.java
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/NormalizeCharMap.java
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+/**
+ * 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.
+ */
+
+package org.apache.lucene.analysis;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Holds a map of String input to String output, to be used
+ * with {@link MappingCharFilter}.
+ */
+public class NormalizeCharMap {
+
+  Map<Character, NormalizeCharMap> submap;
+  String normStr;
+  int diff;
+
+  /** Records a replacement to be applied to the inputs
+   *  stream.  Whenever <code>singleMatch</code> occurs in
+   *  the input, it will be replaced with
+   *  <code>replacement</code>.
+   *
+   * @param singleMatch input String to be replaced
+   * @param replacement output String
+   */
+  public void add(String singleMatch, String replacement) {
+    NormalizeCharMap currMap = this;
+    for(int i = 0; i < singleMatch.length(); i++) {
+      char c = singleMatch.charAt(i);
+      if (currMap.submap == null) {
+        currMap.submap = new HashMap<Character, NormalizeCharMap>(1);
+      }
+      NormalizeCharMap map = currMap.submap.get(Character.valueOf(c));
+      if (map == null) {
+        map = new NormalizeCharMap();
+        currMap.submap.put(Character.valueOf(c), map);
+      }
+      currMap = map;
+    }
+    if (currMap.normStr != null) {
+      throw new RuntimeException("MappingCharFilter: there is already a mapping for " + singleMatch);
+    }
+    currMap.normStr = replacement;
+    currMap.diff = singleMatch.length() - replacement.length();
+  }
+}