com.viiyue.plugins.mybatis.api.defaults.version.DefaultNextVersionProvider Maven / Gradle / Ivy
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/**
* Copyright (C) 2017 the original author or authors.
*
* 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.viiyue.plugins.mybatis.api.defaults.version;
import java.sql.Timestamp;
import com.viiyue.plugins.mybatis.api.NextVersionProvider;
import com.viiyue.plugins.mybatis.exceptions.ParameterValidateException;
import com.viiyue.plugins.mybatis.metadata.Property;
/**
* Default optimistic lock auto increment version number provider
*
*
* This class will be incremented by 1 each time based on the existing version
* number
*
* @author tangxbai
* @since 1.1.0
*/
public class DefaultNextVersionProvider implements NextVersionProvider {
@Override
public Object nextVersion( Property property, Object currentVersion ) {
if ( currentVersion instanceof Short ) {
return ( Short ) currentVersion + 1;
}
if ( currentVersion instanceof Integer ) {
return ( Integer ) currentVersion + 1;
}
if ( currentVersion instanceof Long ) {
return ( Long ) currentVersion + 1L;
}
if ( currentVersion instanceof Timestamp ) {
return new Timestamp( System.currentTimeMillis() );
}
throw new ParameterValidateException(
"The default optimistic lock version number only supports [ Short, Integer, Long, java.sql.Timestamp ]"
);
}
}