org.unitils.dbmaintainer.script.parsingstate.ParsingState Maven / Gradle / Ivy
/*
* Copyright 2008, Unitils.org
*
* 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.
*/
package org.unitils.dbmaintainer.script.parsingstate;
import org.unitils.dbmaintainer.script.StatementBuilder;
/**
* A state of a parser that can handle a character and knows when the state ends and is transfered to another state.
* For example, an in-block-comment state knows when the block-comment ends and then transfers control to the initial state.
*
* @author Tim Ducheyne
* @author Filip Neven
*/
public interface ParsingState {
/**
* Handles the next character in the script.
*
* @param previousChar The previous char, 0 if none
* @param currentChar The current char
* @param nextChar The next char, 0 if none
* @param statementBuilder The statement builder, not null
* @return The next parsing state, null if the end of the statement is reached
*/
ParsingState handleNextChar(char previousChar, char currentChar, char nextChar, StatementBuilder statementBuilder);
}