spring CharacterToNumberFactory 源码
spring CharacterToNumberFactory 代码
文件路径：/spring-core/src/main/java/org/springframework/core/convert/support/CharacterToNumberFactory.java
/*
* Copyright 2002-2016 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
*
* https://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 org.springframework.core.convert.support;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;
import org.springframework.util.NumberUtils;
/**
* Converts from a Character to any JDK-standard Number implementation.
*
* <p>Support Number classes including Byte, Short, Integer, Float, Double, Long, BigInteger, BigDecimal. This class
* delegates to {@link NumberUtils#convertNumberToTargetClass(Number, Class)} to perform the conversion.
*
* @author Keith Donald
* @since 3.0
* @see java.lang.Byte
* @see java.lang.Short
* @see java.lang.Integer
* @see java.lang.Long
* @see java.math.BigInteger
* @see java.lang.Float
* @see java.lang.Double
* @see java.math.BigDecimal
* @see NumberUtils
*/
final class CharacterToNumberFactory implements ConverterFactory<Character, Number> {
@Override
public <T extends Number> Converter<Character, T> getConverter(Class<T> targetType) {
return new CharacterToNumber<>(targetType);
}
private static final class CharacterToNumber<T extends Number> implements Converter<Character, T> {
private final Class<T> targetType;
public CharacterToNumber(Class<T> targetType) {
this.targetType = targetType;
}
@Override
public T convert(Character source) {
return NumberUtils.convertNumberToTargetClass((short) source.charValue(), this.targetType);
}
}
}
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