code: /*******************************************************************************
   * Copyright (c) 2009-2014 Richard Eckart de Castilho.
   *
   * 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.
   * 
   * Contributors:
   *     Richard Eckart de Castilho - initial API and implementation
   ******************************************************************************/
  package org.annolab.tt4j;
  
  /**
   * A token handler receives a notification for each tagged token.
   *
   * @author Richard Eckart de Castilho
   *
   * @param <O> the token type.
   */
  public
  interface TokenHandler<O>
  {
  	/**
  	 * Process a token that TreeTagger has analyzed.
  	 *
  	 * @param token the one of the token objects passed to
  	 *     {@link TreeTaggerWrapper#process(java.util.Collection)}
  	 * @param pos the Part-of-Speech tag as produced by TreeTagger or <code>null</code>.
  	 * @param lemma the lemma as produced by TreeTagger or <code>null</code>.
  	 */
  	void token(
  			O token,
  			String pos,
  			String lemma);
  }
  