holmos.reflect.reflectCheck.comparator.HolmosSimpleComparator Maven / Gradle / Ivy
package holmos.reflect.reflectCheck.comparator;
import holmos.reflect.reflectCheck.HolmosReflectionComparator;
import holmos.reflect.reflectCheck.difference.HolmosDifference;
import java.util.Calendar;
import java.util.Date;
/**比较简单的形式的比较，如果比较的内容或者要求比较简单，那么这个比较会加速
* leftValue和rightValue是一个对象
* leftValue和rightValue都是null
* leftValue和rightValue都是枚举类型
* leftValue和rightValue都是java.lang的基础类
* leftValue和rightValue都是Charater和Number
* @author 吴银龙(15857164387)
* */
public class HolmosSimpleComparator implements HolmosComparator{
public boolean canCompare(Object left, Object right) {
if (left == right) {
return true;
}
if (left == null || right == null) {
return true;
}
if ((left instanceof Character || left instanceof Number) && (right instanceof Character || right instanceof Number)) {
return true;
}
if (left.getClass().getName().startsWith("java.lang") || right.getClass().getName().startsWith("java.lang")) {
return true;
}
if (left instanceof Date || right instanceof Date) {
return true;
}
if (left instanceof Calendar || right instanceof Calendar) {
return true;
}
if (left instanceof Enum && right instanceof Enum) {
return true;
}
return false;
}
public HolmosDifference compare(Object left, Object right, boolean onlyFirstDifference, HolmosReflectionComparator reflectionComparator) {
// check if the same instance is referenced
if (left == right) {
return null;
}
// check if the left value is null
if (left == null) {
return new HolmosDifference( left, right,"左值为null");
}
// check if the right value is null
if (right == null) {
return new HolmosDifference(left, right,"右值为null");
}
// check if right and left have same number value (including NaN and Infinity)
if ((left instanceof Character || left instanceof Number) && (right instanceof Character || right instanceof Number)) {
Double leftDouble = getDoubleValue(left);
Double rightDouble = getDoubleValue(right);
if (leftDouble.equals(rightDouble)) {
return null;
}
return new HolmosDifference(left, right,"Simple类型两个数值不一致");
}
// check if java objects are equal
if (left.getClass().getName().startsWith("java.lang") || right.getClass().getName().startsWith("java.lang")) {
if (left.equals(right)) {
return null;
}
return new HolmosDifference(left, right,"Simple类型两个对象不一致");
}
// check if dates are equal
if (left instanceof Date && right instanceof Date) {
if (left.equals(right)) {
return null;
}
return new HolmosDifference(left, right,"Simple两个时间值不一致");
}
// check if dates are equal
if (left instanceof Calendar && right instanceof Calendar) {
if (left.equals(right)) {
return null;
}
return new HolmosDifference(left, right,"Calander两个实例的值不一致");
}
// check if enums are equal
if (left instanceof Enum && right instanceof Enum) {
if (left.equals(right)) {
return null;
}
return new HolmosDifference( left, right,"两个实例的枚举值不一致");
}
return null;
}
private Double getDoubleValue(Object object) {
if (object instanceof Number) {
return ((Number) object).doubleValue();
}
return (double) ((Character) object).charValue();
}
}