878ddf1fc3
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
81 lines
2.2 KiB
Java
81 lines
2.2 KiB
Java
/*
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*
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* Copyright 2002-2004 The Ant-Contrib project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.sf.antcontrib.cpptasks.parser;
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/**
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* This parser state checks consumed characters against a specific character.
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*
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* @author Curt Arnold
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*/
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public final class LetterState
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extends AbstractParserState {
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/**
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* Next state if a match is found.
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*/
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private final AbstractParserState nextState;
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/**
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* Next state if not match is found.
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*/
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private final AbstractParserState noMatchState;
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/**
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* Character to match.
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*/
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private final char thisLetter;
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/**
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* Constructor.
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*
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* @param parser
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* parser
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* @param matchLetter
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* letter to match
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* @param nextStateArg
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* next state if a match on the letter
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* @param noMatchStateArg
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* state if no match on letter
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*/
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public LetterState(final AbstractParser parser,
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final char matchLetter,
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final AbstractParserState nextStateArg,
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final AbstractParserState noMatchStateArg) {
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super(parser);
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this.thisLetter = matchLetter;
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this.nextState = nextStateArg;
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this.noMatchState = noMatchStateArg;
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}
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/**
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* Consumes a character and returns the next state for the parser.
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*
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* @param ch
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* next character
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* @return the configured nextState if ch is the expected character or the
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* configure noMatchState otherwise.
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*/
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public AbstractParserState consume(final char ch) {
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if (ch == thisLetter) {
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return nextState;
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}
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if (ch == '\n') {
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getParser().getNewLineState();
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}
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return noMatchState;
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}
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}
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