
com.feilong.lib.json.processors.JsonVerifier Maven / Gradle / Ivy
/*
* Copyright (C) 2008 feilong
*
* 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.feilong.lib.json.processors;
import java.math.BigDecimal;
import java.math.BigInteger;
import com.feilong.lib.json.JSON;
import com.feilong.lib.json.JSONNull;
/**
* Verifies if a value is a valid JSON value.
*
* @author Andres Almiray
*/
public final class JsonVerifier{
/** Don't let anyone instantiate this class. */
private JsonVerifier(){
//AssertionError不是必须的. 但它可以避免不小心在类的内部调用构造器. 保证该类在任何情况下都不会被实例化.
//see 《Effective Java》 2nd
throw new AssertionError("No " + getClass().getName() + " instances for you!");
}
//---------------------------------------------------------------
/**
* Verifies if value is a valid JSON value.
*
* @param value
* the value to verify
* @return true, if is valid json value
*/
public static boolean isValidJsonValue(Object value){
return JSONNull.getInstance().equals(value) //
|| value instanceof JSON //
|| value instanceof Boolean //
|| value instanceof Byte //
|| value instanceof Short//
|| value instanceof Integer //
|| value instanceof Long //
|| value instanceof Double //
|| value instanceof BigInteger //
|| value instanceof BigDecimal //
|| value instanceof String;
}
}
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