KeywordAnalyzer contribution - adapted from _Lucene in Action_ code

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@152921 13f79535-47bb-0310-9956-ffa450edef68

contrib/analyzers/src/java/org/apache/lucene/analysis/KeywordAnalyzer.java

@@ -0,0 +1,49 @@
+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.
+ */
+
+import java.io.IOException;
+import java.io.Reader;
+
+/**
+ * "Tokenizes" the entire stream as a single token.
+ */
+public class KeywordAnalyzer extends Analyzer {
+  public TokenStream tokenStream(String fieldName,
+                                 final Reader reader) {
+    return new TokenStream() {
+      private boolean done;
+      private final char[] buffer = new char[1024];
+      public Token next() throws IOException {
+        if (!done) {
+          done = true;
+          StringBuffer buffer = new StringBuffer();
+          int length;
+          while (true) {
+            length = reader.read(this.buffer);
+            if (length == -1) break;
+
+            buffer.append(this.buffer, 0, length);
+          }
+          String text = buffer.toString();
+          return new Token(text, 0, text.length());
+        }
+        return null;
+      }
+    };
+  }
+}

contrib/analyzers/src/test/org/apache/lucene/analysis/TestKeywordAnalyzer.java

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+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.
+ */
+
+import junit.framework.TestCase;
+import org.apache.lucene.index.IndexWriter;
+import org.apache.lucene.store.RAMDirectory;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.search.Hits;
+import org.apache.lucene.queryParser.QueryParser;
+
+public class TestKeywordAnalyzer extends TestCase {
+  RAMDirectory directory;
+  private IndexSearcher searcher;
+
+  public void setUp() throws Exception {
+    directory = new RAMDirectory();
+    IndexWriter writer = new IndexWriter(directory,
+                                         new SimpleAnalyzer(),
+                                         true);
+
+    Document doc = new Document();
+    doc.add(Field.Keyword("partnum", "Q36"));
+    doc.add(Field.Text("description", "Illidium Space Modulator"));
+    writer.addDocument(doc);
+
+    writer.close();
+
+    searcher = new IndexSearcher(directory);
+  }
+
+  public void testPerFieldAnalyzer() throws Exception {
+    PerFieldAnalyzerWrapper analyzer = new PerFieldAnalyzerWrapper(
+                                              new SimpleAnalyzer());
+    analyzer.addAnalyzer("partnum", new KeywordAnalyzer());
+
+    Query query = QueryParser.parse("partnum:Q36 AND SPACE",
+                                    "description",
+                                    analyzer);
+
+    Hits hits = searcher.search(query);
+    assertEquals("Q36 kept as-is",
+              "+partnum:Q36 +space", query.toString("description"));
+    assertEquals("doc found!", 1, hits.length());
+  }
+}