package org.apache.lucene.analysis;

import java.io.IOException;
import java.io.Reader;

/**
 * Copyright 2005 The Apache Software Foundation
 * <p/>
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.
 */

public class KeywordTokenizer extends Tokenizer {
  private boolean done;
  private final char[] buffer = new char[1024];

  public KeywordTokenizer(Reader input) {
    super(input);
  }

  public Token next() throws IOException {
    if (!done) {
      done = true;
      StringBuffer buffer = new StringBuffer();
      int length;
      while (true) {
        length = input.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;
  }
}

@@ -773,69 +773,190 @@
 ate 
-boolean done;%0A  private final char%5B%5D buffer = new char%5B1024%5D;
+static final int DEFAULT_BUFFER_SIZE=256;%0A%0A  private boolean done;%0A  private final char%5B%5D buffer;%0A%0A  public KeywordTokenizer(Reader input) %7B%0A    this(input, DEFAULT_BUFFER_SIZE);%0A  %7D
 %0A%0A  
@@ -983,32 +983,48 @@
 zer(Reader input
+, int bufferSize
 ) %7B%0A    super(in
@@ -1029,16 +1029,75 @@
 input);%0A
+    this.buffer=new char%5BbufferSize%5D;%0A    this.done=false;%0A
   %7D%0A%0A  p

add customizable buffer size