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1   /*
2    * Copyright 2004-2005 the original author or authors.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5    * use this file except in compliance with the License. You may obtain a copy of
6    * the License at
7    * 
8    * http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations under
14   * the License.
15   */
16  package net.sf.morph.lang.support;
17  
18  import net.sf.morph.lang.InvalidExpressionException;
19  
20  /**
21   * A basic parser that breaks an expression into an array of tokens.
22   * 
23   * @author Matt Sgarlata
24   * @since Nov 28, 2004
25   */
26  public interface ExpressionParser {
27  
28  	/**
29  	 * Parses an expression and returns the tokens found in the expression.
30  	 * 
31  	 * @param expression
32  	 *            the expression
33  	 * @return the tokens found in the expression
34  	 * @throws InvalidExpressionException
35  	 *             if the supplied expression is invalid
36  	 */
37  	public String[] parse(String expression) throws InvalidExpressionException;
38  }