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Lucene example source code file (TermAttribute.java)

This example Lucene source code file (TermAttribute.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

attribute, attribute, deprecated, deprecated, string, string, termattribute, termattribute

The Lucene TermAttribute.java source code

package org.apache.lucene.analysis.tokenattributes;

/**
 * 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 org.apache.lucene.util.Attribute;

/**
 * The term text of a Token.
 * @deprecated Use {@link CharTermAttribute} instead.
 */
@Deprecated
public interface TermAttribute extends Attribute {
  /** Returns the Token's term text.
   * 
   * This method has a performance penalty
   * because the text is stored internally in a char[].  If
   * possible, use {@link #termBuffer()} and {@link
   * #termLength()} directly instead.  If you really need a
   * String, use this method, which is nothing more than
   * a convenience call to <b>new String(token.termBuffer(), 0, token.termLength())
   */
  public String term();
  
  /** Copies the contents of buffer, starting at offset for
   *  length characters, into the termBuffer array.
   *  @param buffer the buffer to copy
   *  @param offset the index in the buffer of the first character to copy
   *  @param length the number of characters to copy
   */
  public void setTermBuffer(char[] buffer, int offset, int length);

  /** Copies the contents of buffer into the termBuffer array.
   *  @param buffer the buffer to copy
   */
  public void setTermBuffer(String buffer);

  /** Copies the contents of buffer, starting at offset and continuing
   *  for length characters, into the termBuffer array.
   *  @param buffer the buffer to copy
   *  @param offset the index in the buffer of the first character to copy
   *  @param length the number of characters to copy
   */
  public void setTermBuffer(String buffer, int offset, int length);
  
  /** Returns the internal termBuffer character array which
   *  you can then directly alter.  If the array is too
   *  small for your token, use {@link
   *  #resizeTermBuffer(int)} to increase it.  After
   *  altering the buffer be sure to call {@link
   *  #setTermLength} to record the number of valid
   *  characters that were placed into the termBuffer. */
  public char[] termBuffer();

  /** Grows the termBuffer to at least size newSize, preserving the
   *  existing content. Note: If the next operation is to change
   *  the contents of the term buffer use
   *  {@link #setTermBuffer(char[], int, int)},
   *  {@link #setTermBuffer(String)}, or
   *  {@link #setTermBuffer(String, int, int)}
   *  to optimally combine the resize with the setting of the termBuffer.
   *  @param newSize minimum size of the new termBuffer
   *  @return newly created termBuffer with length >= newSize
   */
  public char[] resizeTermBuffer(int newSize);

  /** Return number of valid characters (length of the term)
   *  in the termBuffer array. */
  public int termLength();
  
  /** Set number of valid characters (length of the term) in
   *  the termBuffer array. Use this to truncate the termBuffer
   *  or to synchronize with external manipulation of the termBuffer.
   *  Note: to grow the size of the array,
   *  use {@link #resizeTermBuffer(int)} first.
   *  @param length the truncated length
   */
  public void setTermLength(int length);
}

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