com.holmos.reflect.reflectCheck.comparator.HolmosNumberComparator Maven / Gradle / Ivy
package com.holmos.reflect.reflectCheck.comparator;
import com.holmos.reflect.reflectCheck.HolmosReflectionComparator;
import com.holmos.reflect.reflectCheck.difference.HolmosDifference;
/**数值比较器，一个用来比较int和double和float 的比较器
*
* @author 吴银龙([email protected])
* */
public class HolmosNumberComparator implements HolmosComparator{
public boolean canCompare(Object leftValue, Object rightValue) {
if(leftValue==null || rightValue==null)
return false;
if((leftValue instanceof Number || leftValue instanceof Character )&&
(rightValue instanceof Number || rightValue instanceof Character))
return true;
return false;
}
/**比较leftValue和rightValue，比较前先将两个值都转换成Double类型*/
public HolmosDifference compare(Object leftValue, Object rightValue,
boolean onlyIfFirstDifference,
HolmosReflectionComparator holmosreflectionComparator) {
//由于long类型转换为Double类型会损失精度，造成匹配失败，所以，将long类型单独处理
if(leftValue instanceof Long && rightValue instanceof Long){
if(((Long)leftValue).longValue()!=((Long)rightValue).longValue())
return new HolmosDifference(leftValue, rightValue, "数值比较两个long类型的值大小不一致!");
}
Double leftDouble=getDoubleValue(leftValue);
Double rightDouble=getDoubleValue(rightValue);
if(!leftDouble.equals(rightDouble))
return new HolmosDifference(leftValue, rightValue, "数值比较两个实例的值的大小不一致!");
return null;
}
/**将数值类型或者Character类型的实例转换为Double类型实例
* @param object 将数值类型或者Character类型的实例
* @return 数值类型或者Character类型的实例转换为Double类型实例*/
private Double getDoubleValue(Object object) {
if (object instanceof Number) {
return ((Number) object).doubleValue();
}
return (double) ((Character) object).charValue();
}
}