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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
/*
* 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.core.util.transformer;
import java.io.Serializable;
import org.apache.commons.collections4.Transformer;
import com.feilong.core.NumberPattern;
import com.feilong.core.lang.NumberUtil;
import com.feilong.core.Validate;
/**
* 数字转成字符串的转换器.
*
* @author feilong
* @since 1.10.7
*/
public class NumberToStringTransformer implements Transformer,Serializable{
/** The Constant serialVersionUID. */
private static final long serialVersionUID = -8811898394834078637L;
/** 模式,可以使用 {@link NumberPattern}. */
private final String pattern;
//---------------------------------------------------------------
/**
* Instantiates a new number to string transformer.
*
*
* 如果 pattern
是null,抛出 {@link NullPointerException}
* 如果 pattern
是blank,抛出 {@link IllegalArgumentException}
*
*
* @param pattern
* 模式,可以使用 {@link NumberPattern}
*/
public NumberToStringTransformer(String pattern){
Validate.notBlank(pattern, "pattern can't be blank!");
this.pattern = pattern;
}
//---------------------------------------------------------------
/*
* (non-Javadoc)
*
* @see org.apache.commons.collections4.Transformer#transform(java.lang.Object)
*/
@Override
public String transform(Number value){
return null == value ? null : NumberUtil.toString(value, pattern);
}
}