xyz.felh.utils.Preconditions Maven / Gradle / Ivy
package xyz.felh.utils;
import java.util.List;
import java.util.Map;
/**
* @author Forest Wang
* @package cn.magicwindow.common.util
* @class Preconditions
* @email [email protected]
* @date 22/08/2017 17:26
* @description Preconditions class
*/
public class Preconditions {
/**
* check if object is null for List Map String
*
* @param t object
* @param Type T
* @return isBlank
*/
public static boolean isBlank(T t) {
boolean result = false;
if (t == null) {
return true;
}
if (t instanceof List) {
if (((List) t).isEmpty()) {
return true;
}
} else if (t instanceof Map) {
if (((Map) t).isEmpty()) {
return true;
}
} else if (t instanceof Object[]) {
if (((Object[]) t).length == 0) {
return true;
}
} else if (t instanceof String) {
int strLen = ((String) t).length();
if (strLen == 0) {
return true;
}
for (int i = 0; i < strLen; i++) {
if (!Character.isWhitespace(((String) t).charAt(i))) {
return false;
}
}
return true;
}
return result;
}
public static boolean isNotBlank(T t) {
return !isBlank(t);
}
}