org.onetwo.common.spring.converter.IntegerToEnumConverterFactory Maven / Gradle / Ivy

Go to download

package org.onetwo.common.spring.converter;

import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;

/**
 * @author weishao zeng
 * 

 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public class IntegerToEnumConverterFactory implements ConverterFactory {

	@Override
	public  Converter getConverter(Class targetType) {
		return new IntegerToEnum(targetType);
	}

	private class IntegerToEnum implements Converter {

		private final Class enumType;
		
		public IntegerToEnum(Class enumType) {
			super();
			this.enumType = enumType;
		}

		@Override
		public T convert(Integer source) {
			T[] values = (T[]) enumType.getEnumConstants();
			int ordinal = source;
			return ordinal>values.length?null:values[ordinal];
		}
		
		
	}

}