com.alibaba.nacos.common.paramcheck.ParamCheckerManager Maven / Gradle / Ivy
/*
* Copyright 1999-2023 Alibaba Group Holding Ltd.
*
* 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.nacos.common.paramcheck;
import com.alibaba.nacos.common.spi.NacosServiceLoader;
import com.alibaba.nacos.common.utils.StringUtils;
import java.util.Collection;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* The type Param checker manager.
*
* @author zhuoguang
*/
public class ParamCheckerManager {
private static final ParamCheckerManager INSTANCE = new ParamCheckerManager();
private static final AbstractParamChecker DEFAULT_PARAM_CHECKER = new DefaultParamChecker();
private final Map paramCheckerMap = new ConcurrentHashMap<>();
private ParamCheckerManager() {
Collection paramCheckers = NacosServiceLoader.load(AbstractParamChecker.class);
for (AbstractParamChecker paramChecker : paramCheckers) {
String checkerType = paramChecker.getCheckerType();
paramCheckerMap.put(checkerType, paramChecker);
}
}
public static ParamCheckerManager getInstance() {
return INSTANCE;
}
public AbstractParamChecker getParamChecker(String checkerType) {
if (StringUtils.isBlank(checkerType)) {
return DEFAULT_PARAM_CHECKER;
}
AbstractParamChecker paramChecker = paramCheckerMap.get(checkerType);
if (paramChecker == null) {
paramChecker = DEFAULT_PARAM_CHECKER;
}
return paramChecker;
}
}