com.alibaba.fastjson.parser.JSONToken#RBRACE源码实例Demo

public boolean hasNext() {
    if (context == null) {
        throw new JSONException("context is null");
    }

    final int token = parser.lexer.token();
    final int state = context.state;
    switch (state) {
        case StartArray:
        case ArrayValue:
            return token != JSONToken.RBRACKET;
        case StartObject:
        case PropertyValue:
            return token != JSONToken.RBRACE;
        default:
            throw new JSONException("illegal state : " + state);
    }
}
 

/**
 * 解析应答
 *
 * @param parser 解析器
 * @param lexer  文法
 * @return 应答
 */
protected ResponsePayload parse(final DefaultJSONParser parser, final JSONLexer lexer) {
    ResponsePayload payload = new ResponsePayload();
    String key;
    int token;
    try {
        String typeName = null;
        for (; ; ) {
            // lexer.scanSymbol
            key = lexer.scanSymbol(parser.getSymbolTable());
            if (key == null) {
                token = lexer.token();
                if (token == JSONToken.RBRACE) {
                    lexer.nextToken(JSONToken.COMMA);
                    break;
                } else if (token == JSONToken.COMMA) {
                    if (lexer.isEnabled(Feature.AllowArbitraryCommas)) {
                        continue;
                    }
                }
            }
            lexer.nextTokenWithColon(JSONToken.LITERAL_STRING);
            if (RES_CLASS.equals(key)) {
                typeName = parseString(lexer, RES_CLASS, false);
            } else if (RESPONSE.equals(key)) {
                payload.setResponse(parseResponse(parser, lexer, typeName));
            } else if (EXCEPTION.equals(key)) {
                payload.setException((Throwable) parseObject(parser, lexer, getThrowableType(typeName)));
            }
            if (lexer.token() == JSONToken.RBRACE) {
                lexer.nextToken(JSONToken.COMMA);
                break;
            }
        }
        return payload;
    } catch (ClassNotFoundException e) {
        throw new SerializerException(e.getMessage());
    }
}
 

/**
 * 解析Invocation
 *
 * @param parser 解析器
 * @param lexer  文法
 * @return
 */
protected Call parse(final DefaultJSONParser parser, final JSONLexer lexer) {
    Call invocation = createInvocation();
    String key;
    int token;
    try {
        for (; ; ) {
            // lexer.scanSymbol
            key = lexer.scanSymbol(parser.getSymbolTable());
            if (key == null) {
                token = lexer.token();
                if (token == JSONToken.RBRACE) {
                    lexer.nextToken(JSONToken.COMMA);
                    break;
                } else if (token == JSONToken.COMMA) {
                    if (lexer.isEnabled(Feature.AllowArbitraryCommas)) {
                        continue;
                    }
                }
            }
            lexer.nextTokenWithColon(JSONToken.LITERAL_STRING);

            if (classNameKey.equals(key)) {
                invocation.setClassName(parseString(lexer, classNameKey, false));
            } else if (aliasKey.equals(key)) {
                invocation.setAlias(parseString(lexer, aliasKey, true));
            } else if (methodNameKey.equals(key)) {
                invocation.setMethodName(parseString(lexer, methodNameKey, false));
            } else if (argsTypeKey.equals(key)) {
                invocation.setArgsType(parseStrings(parser, lexer, argsTypeKey));
            } else if (argsKey.equals(key)) {
                invocation.setArgs(parseObjects(parser, lexer, invocation.computeTypes(), argsKey));
            } else if (attachmentsKey.equals(key)) {
                invocation.addAttachments(parseMap(parser, lexer, attachmentsKey));
            }
            if (lexer.token() == JSONToken.RBRACE) {
                lexer.nextToken(JSONToken.COMMA);
                break;
            }
        }
        return invocation;
    } catch (ClassNotFoundException | NoSuchMethodException | MethodOverloadException e) {
        throw new SerializerException(e.getMessage());
    }

}
 

@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
    JSONLexer lexer = parser.lexer;
    
    if (lexer.token() == JSONToken.COMMA) {
        lexer.nextToken(JSONToken.LITERAL_STRING);
        
        if (lexer.token() != JSONToken.LITERAL_STRING) {
            throw new JSONException("syntax error");
        }
        
        lexer.nextTokenWithColon(JSONToken.LITERAL_INT);
        
        if (lexer.token() != JSONToken.LITERAL_INT) {
            throw new JSONException("syntax error");
        }
        
        long time = lexer.longValue();
        lexer.nextToken(JSONToken.RBRACE);
        if (lexer.token() != JSONToken.RBRACE) {
            throw new JSONException("syntax error");
        }
        lexer.nextToken(JSONToken.COMMA);
        
        return (T) new java.sql.Time(time);
    }
    
    Object val = parser.parse();

    if (val == null) {
        return null;
    }

    if (val instanceof java.sql.Time) {
        return (T) val;
    } else if (val instanceof BigDecimal) {
        return (T) new java.sql.Time(TypeUtils.longValue((BigDecimal) val));
    } else if (val instanceof Number) {
        return (T) new java.sql.Time(((Number) val).longValue());
    } else if (val instanceof String) {
        String strVal = (String) val;
        if (strVal.length() == 0) {
            return null;
        }
        
        long longVal;
        JSONScanner dateLexer = new JSONScanner(strVal);
        if (dateLexer.scanISO8601DateIfMatch()) {
            longVal = dateLexer.getCalendar().getTimeInMillis();
        } else {
            boolean isDigit = true;
            for (int i = 0; i< strVal.length(); ++i) {
                char ch = strVal.charAt(i);
                if (ch < '0' || ch > '9') {
                    isDigit = false;
                    break;
                }
            }
            if (!isDigit) {
                dateLexer.close();
                return (T) java.sql.Time.valueOf(strVal);    
            }
            
            longVal = Long.parseLong(strVal);
        }
        dateLexer.close();
        return (T) new java.sql.Time(longVal);
    }
    
    throw new JSONException("parse error");
}
 

protected Font parseFont(DefaultJSONParser parser) {
    JSONLexer lexer = parser.lexer;
    
    int size = 0, style = 0;
    String name = null;
    for (;;) {
        if (lexer.token() == JSONToken.RBRACE) {
            lexer.nextToken();
            break;
        }

        String key;
        if (lexer.token() == JSONToken.LITERAL_STRING) {
            key = lexer.stringVal();
            lexer.nextTokenWithColon(JSONToken.LITERAL_INT);
        } else {
            throw new JSONException("syntax error");
        }


        if (key.equalsIgnoreCase("name")) {
            if (lexer.token() == JSONToken.LITERAL_STRING) {
                name = lexer.stringVal();
                lexer.nextToken();
            } else {
                throw new JSONException("syntax error");
            }
        } else if (key.equalsIgnoreCase("style")) {
            if (lexer.token() == JSONToken.LITERAL_INT) {
                style = lexer.intValue();
                lexer.nextToken();
            } else {
                throw new JSONException("syntax error");
            }
        } else if (key.equalsIgnoreCase("size")) {
            if (lexer.token() == JSONToken.LITERAL_INT) {
                size = lexer.intValue();
                lexer.nextToken();
            } else {
                throw new JSONException("syntax error");
            }
        } else {
            throw new JSONException("syntax error, " + key);
        }

        if (lexer.token() == JSONToken.COMMA) {
            lexer.nextToken(JSONToken.LITERAL_STRING);
        }
    }

    return new Font(name, style, size);
}
 

protected Color parseColor(DefaultJSONParser parser) {
    JSONLexer lexer = parser.lexer;
    
    int r = 0, g = 0, b = 0, alpha = 0;
    for (;;) {
        if (lexer.token() == JSONToken.RBRACE) {
            lexer.nextToken();
            break;
        }

        String key;
        if (lexer.token() == JSONToken.LITERAL_STRING) {
            key = lexer.stringVal();
            lexer.nextTokenWithColon(JSONToken.LITERAL_INT);
        } else {
            throw new JSONException("syntax error");
        }

        int val;
        if (lexer.token() == JSONToken.LITERAL_INT) {
            val = lexer.intValue();
            lexer.nextToken();
        } else {
            throw new JSONException("syntax error");
        }

        if (key.equalsIgnoreCase("r")) {
            r = val;
        } else if (key.equalsIgnoreCase("g")) {
            g = val;
        } else if (key.equalsIgnoreCase("b")) {
            b = val;
        } else if (key.equalsIgnoreCase("alpha")) {
            alpha = val;
        } else {
            throw new JSONException("syntax error, " + key);
        }

        if (lexer.token() == JSONToken.COMMA) {
            lexer.nextToken(JSONToken.LITERAL_STRING);
        }
    }

    return new Color(r, g, b, alpha);
}