com.ibasco.agql.core.util.Strings Maven / Gradle / Ivy
/*
* Copyright (c) 2022 Asynchronous Game Query Library
*
* 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.ibasco.agql.core.util;
/**
* Strings class.
*
* @author Rafael Luis Ibasco
*/
public class Strings {
/** Constant EMPTY="" */
public static final String EMPTY = "";
/**
* isNumeric.
*
* @param str
* a {@link java.lang.String} object
*
* @return a boolean
*/
public static boolean isNumeric(String str) {
if (isBlank(str)) {
return false;
}
final int size = str.length();
for (int i = 0; i < size; i++) {
if (!Character.isDigit(str.charAt(i)))
return false;
}
return true;
}
/**
* isBlank.
*
* @param str
* a {@link java.lang.String} object
*
* @return a boolean
*/
public static boolean isBlank(String str) {
return str == null || "".equals(str.trim());
}
/**
* defaultIfEmpty.
*
* @param value
* a {@link java.lang.String} object
* @param defaultValue
* a {@link java.lang.String} object
*
* @return a {@link java.lang.String} object
*/
public static String defaultIfEmpty(String value, String defaultValue) {
return isBlank(value) ? defaultValue : value;
}
}