Author: ehatcher
Date: Mon Apr 4 02:10:05 2005
New Revision: 160011
URL: http://svn.apache.org/viewcvs?view=rev&rev=160011
Log:
Add accent character normalizer filter contributed by Sven Duzont. Also
created simple test case.
Added:
lucene/java/trunk/contrib/analyzers/src/java/org/apache/lucene/analysis/ISOLatin1AccentFilter.java
lucene/java/trunk/contrib/analyzers/src/test/org/apache/lucene/analysis/TestISOLatin1AccentFilter.java
Added:
lucene/java/trunk/contrib/analyzers/src/java/org/apache/lucene/analysis/ISOLatin1AccentFilter.java
URL:
http://svn.apache.org/viewcvs/lucene/java/trunk/contrib/analyzers/src/java/org/apache/lucene/analysis/ISOLatin1AccentFilter.java?view=auto&rev=160011
==============================================================================
---
lucene/java/trunk/contrib/analyzers/src/java/org/apache/lucene/analysis/ISOLatin1AccentFilter.java
(added)
+++
lucene/java/trunk/contrib/analyzers/src/java/org/apache/lucene/analysis/ISOLatin1AccentFilter.java
Mon Apr 4 02:10:05 2005
@@ -0,0 +1,171 @@
+package org.apache.lucene.analysis;
+
+/**
+ * Copyright 2005 The Apache Software Foundation
+ *
+ * Licensed 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.
+ */
+
+/**
+ * A filter that replace accented characters in the ISO Latin 1 character set
by
+ * their unaccented equivalent. The case will not be altered.
+ * <p>
+ * For instance, 'Ã' will be replaced by 'a'.
+ * <p>
+ */
+public class ISOLatin1AccentFilter extends TokenFilter {
+ public ISOLatin1AccentFilter(TokenStream input) {
+ super(input);
+ }
+
+ /**
+ * To replace accented characters by unaccented equivalents.
+ */
+ public final Token next() throws java.io.IOException {
+ final Token t = input.next();
+ if (t == null)
+ return null;
+ // Return a token with filtered characters.
+ return new Token(RemoveAccents(t.termText()), t.startOffset(),
t.endOffset(), t.type());
+ }
+
+ /**
+ * To replace accented characters in a String by unaccented equivalents.
+ */
+ public final static String RemoveAccents(String input) {
+ final StringBuffer output = new StringBuffer();
+ for (int i = 0; i < input.length(); i++) {
+ switch (input.charAt(i)) {
+ case '\u00C0' : // Ã
+ case '\u00C1' : // Ã
+ case '\u00C2' : // Ã
+ case '\u00C3' : // Ã
+ case '\u00C4' : // Ã
+ case '\u00C5' : // Ã
+ output.append("A");
+ break;
+ case '\u00C6' : // Ã
+ output.append("AE");
+ break;
+ case '\u00C7' : // Ã
+ output.append("C");
+ break;
+ case '\u00C8' : // Ã
+ case '\u00C9' : // Ã
+ case '\u00CA' : // Ã
+ case '\u00CB' : // Ã
+ output.append("E");
+ break;
+ case '\u00CC' : // Ã
+ case '\u00CD' : // Ã
+ case '\u00CE' : // Ã
+ case '\u00CF' : // Ã
+ output.append("I");
+ break;
+ case '\u00D0' : // Ã
+ output.append("D");
+ break;
+ case '\u00D1' : // Ã
+ output.append("N");
+ break;
+ case '\u00D2' : // Ã
+ case '\u00D3' : // Ã
+ case '\u00D4' : // Ã
+ case '\u00D5' : // Ã
+ case '\u00D6' : // Ã
+ case '\u00D8' : // Ã
+ output.append("O");
+ break;
+ case '\u0152' : // Â
+ output.append("OE");
+ break;
+ case '\u00DE' : // Ã
+ output.append("TH");
+ break;
+ case '\u00D9' : // Ã
+ case '\u00DA' : // Ã
+ case '\u00DB' : // Ã
+ case '\u00DC' : // Ã
+ output.append("U");
+ break;
+ case '\u00DD' : // Ã
+ case '\u0178' : // Â
+ output.append("Y");
+ break;
+ case '\u00E0' : // Ã
+ case '\u00E1' : // Ã
+ case '\u00E2' : // Ã
+ case '\u00E3' : // Ã
+ case '\u00E4' : // Ã
+ case '\u00E5' : // Ã
+ output.append("a");
+ break;
+ case '\u00E6' : // Ã
+ output.append("ae");
+ break;
+ case '\u00E7' : // Ã
+ output.append("c");
+ break;
+ case '\u00E8' : // Ã
+ case '\u00E9' : // Ã
+ case '\u00EA' : // Ã
+ case '\u00EB' : // Ã
+ output.append("e");
+ break;
+ case '\u00EC' : // Ã
+ case '\u00ED' : // Ã
+ case '\u00EE' : // Ã
+ case '\u00EF' : // Ã
+ output.append("i");
+ break;
+ case '\u00F0' : // Ã
+ output.append("d");
+ break;
+ case '\u00F1' : // Ã
+ output.append("n");
+ break;
+ case '\u00F2' : // Ã
+ case '\u00F3' : // Ã
+ case '\u00F4' : // Ã
+ case '\u00F5' : // Ã
+ case '\u00F6' : // Ã
+ case '\u00F8' : // Ã
+ output.append("o");
+ break;
+ case '\u0153' : // Â
+ output.append("oe");
+ break;
+ case '\u00DF' : // Ã
+ output.append("ss");
+ break;
+ case '\u00FE' : // Ã
+ output.append("th");
+ break;
+ case '\u00F9' : // Ã
+ case '\u00FA' : // Ã
+ case '\u00FB' : // Ã
+ case '\u00FC' : // Â
+ output.append("u");
+ break;
+ case '\u00FD' : // Ã
+ case '\u00FF' : // Ã
+ output.append("y");
+ break;
+ default :
+ output.append(input.charAt(i));
+ break;
+ }
+ }
+ return output.toString();
+ }
+}
\ No newline at end of file
Added:
lucene/java/trunk/contrib/analyzers/src/test/org/apache/lucene/analysis/TestISOLatin1AccentFilter.java
URL:
http://svn.apache.org/viewcvs/lucene/java/trunk/contrib/analyzers/src/test/org/apache/lucene/analysis/TestISOLatin1AccentFilter.java?view=auto&rev=160011
==============================================================================
---
lucene/java/trunk/contrib/analyzers/src/test/org/apache/lucene/analysis/TestISOLatin1AccentFilter.java
(added)
+++
lucene/java/trunk/contrib/analyzers/src/test/org/apache/lucene/analysis/TestISOLatin1AccentFilter.java
Mon Apr 4 02:10:05 2005
@@ -0,0 +1,16 @@
+package org.apache.lucene.analysis;
+
+import junit.framework.TestCase;
+
+import java.io.StringReader;
+
+public class TestISOLatin1AccentFilter extends TestCase {
+ public void testU() throws Exception {
+ TokenStream stream = new WhitespaceTokenizer(new StringReader("ÃÂ"));
+ ISOLatin1AccentFilter filter = new ISOLatin1AccentFilter(stream);
+ Token token = filter.next();
+ assertEquals("u", token.termText);
+
+ assertNull(filter.next());
+ }
+}
