com.pighand.framework.spring.converter.StringToEnumConverterFactory Maven / Gradle / Ivy

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package com.pighand.framework.spring.converter;

import com.pighand.framework.spring.base.BaseEnum;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;

import java.util.HashMap;
import java.util.Map;

/**
 * 字符串转枚举工厂
 * 
 * add {@code registry.addConverterFactory(new StringToEnumConverterFactory());} to WebMvcConfig
 */
public class StringToEnumConverterFactory implements ConverterFactory {
    private static final Map CONVERTERS = new HashMap<>();

    /**
     * 获取一个从 String 转化为 T 的转换器，T 是一个泛型，有多个实现
     *
     * @param targetType 转换后的类型
     * @return 返回一个转化器
     */
    @Override
    public  Converter getConverter(Class targetType) {
        Converter converter = CONVERTERS.get(targetType);
        if (converter == null) {
            converter = new StringToEnumConverter<>(targetType);
            CONVERTERS.put(targetType, converter);
        }
        return converter;
    }
}