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A set of utilities and tools to speed up and ease programming in Java.

There is a newer version: 0.5

/*
 * (c) 2005 David B. Bracewell
 *
 * 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.
 */

package com.davidbracewell.parsing;

import com.davidbracewell.io.Resources;
import com.davidbracewell.io.resource.Resource;
import com.google.common.base.Throwables;

import java.io.IOException;

/**
 * The interface Lexer.
 *
 * @author David B. Bracewell
 */
public abstract class Lexer {


  /**
   * Lex parser token stream.
   *
   * @param input the input
   * @return the parser token stream
   */
  public ParserTokenStream lex(final String input) {
    try {
      return lex(Resources.fromString(input));
    } catch (IOException e) {
      throw Throwables.propagate(e);
    }
  }

  /**
   * Parses an input into a token stream
   *
   * @param input The input to parse
   * @return A token stream representing the tokenized items
   * @throws java.io.IOException the iO exception
   */
  public abstract ParserTokenStream lex(final Resource input) throws IOException;

}//END OF Lexer