pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/KeywordTokenizer.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/KeywordTokenizer.java
new file mode 100644 (file)
index 0000000..8b818be
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/analysis/KeywordTokenizer.java
@@ -0,0 +1,91 @@
+package org.apache.lucene.analysis;
+
+/**
+ * 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.io.IOException;
+import java.io.Reader;
+
+import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+import org.apache.lucene.util.AttributeSource;
+
+/**
+ * Emits the entire input as a single token.
+ */
+public final class KeywordTokenizer extends Tokenizer {
+  
+  private static final int DEFAULT_BUFFER_SIZE = 256;
+
+  private boolean done = false;
+  private int finalOffset;
+  private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
+  private OffsetAttribute offsetAtt = addAttribute(OffsetAttribute.class);
+  
+  public KeywordTokenizer(Reader input) {
+    this(input, DEFAULT_BUFFER_SIZE);
+  }
+
+  public KeywordTokenizer(Reader input, int bufferSize) {
+    super(input);
+    termAtt.resizeBuffer(bufferSize);
+  }
+
+  public KeywordTokenizer(AttributeSource source, Reader input, int bufferSize) {
+    super(source, input);
+    termAtt.resizeBuffer(bufferSize);
+  }
+
+  public KeywordTokenizer(AttributeFactory factory, Reader input, int bufferSize) {
+    super(factory, input);
+    termAtt.resizeBuffer(bufferSize);
+  }
+  
+  @Override
+  public final boolean incrementToken() throws IOException {
+    if (!done) {
+      clearAttributes();
+      done = true;
+      int upto = 0;
+      char[] buffer = termAtt.buffer();
+      while (true) {
+        final int length = input.read(buffer, upto, buffer.length-upto);
+        if (length == -1) break;
+        upto += length;
+        if (upto == buffer.length)
+          buffer = termAtt.resizeBuffer(1+buffer.length);
+      }
+      termAtt.setLength(upto);
+      finalOffset = correctOffset(upto);
+      offsetAtt.setOffset(correctOffset(0), finalOffset);
+      return true;
+    }
+    return false;
+  }
+  
+  @Override
+  public final void end() {
+    // set final offset 
+    offsetAtt.setOffset(finalOffset, finalOffset);
+  }
+
+  @Override
+  public void reset(Reader input) throws IOException {
+    super.reset(input);
+    this.done = false;
+  }
+}