| /*
|
| * Copyright 1999-2011 Alibaba Group.
|
| *
|
| * 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 com.alibaba.dubbo.common.json; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| import java.io.UnsupportedEncodingException; |
| |
| /** |
| * JSON reader. |
| * |
| * @author qian.lei |
| */ |
| |
| public class JSONReader |
| { |
| private static ThreadLocal<Yylex> LOCAL_LEXER = new ThreadLocal<Yylex>(){}; |
| |
| private Yylex mLex; |
| |
| public JSONReader(InputStream is, String charset) throws UnsupportedEncodingException |
| { |
| this(new InputStreamReader(is, charset)); |
| } |
| |
| public JSONReader(Reader reader) |
| { |
| mLex = getLexer(reader); |
| } |
| |
| public JSONToken nextToken() throws IOException, ParseException |
| { |
| return mLex.yylex(); |
| } |
| |
| public JSONToken nextToken(int expect) throws IOException, ParseException |
| { |
| JSONToken ret = mLex.yylex(); |
| if( ret == null ) |
| throw new ParseException("EOF error."); |
| if( expect != JSONToken.ANY && expect != ret.type ) |
| throw new ParseException("Unexcepted token."); |
| return ret; |
| } |
| |
| private static Yylex getLexer(Reader reader) |
| { |
| Yylex ret = LOCAL_LEXER.get(); |
| if( ret == null ) |
| { |
| ret = new Yylex(reader); |
| LOCAL_LEXER.set(ret); |
| } |
| else |
| { |
| ret.yyreset(reader); |
| } |
| return ret; |
| } |
| } |