com.datasonnet.Utils Maven / Gradle / Ivy
package com.datasonnet;
/*-
* Copyright 2019-2020 the original author or authors.
*
* 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.
*/
/*
* Copyright 2002-2020 the original author or authors.
*
* 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
*
* https://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.
*/
import org.jetbrains.annotations.Nullable;
/**
* Miscellaneous collection of utility methods.
*
*
* This file is a derived work of org.springframework.util.StringUtils and org.springframework.util.ObjectUtils classes from
* Spring Framework v5.3.0-M1. Modifications made to the original work include:
*
Removed support for arrays in nullSafeEquals
*
*
* Thanks to Alex Ruiz for contributing several enhancements to this class!
*
* @author Juergen Hoeller (2002-2020)
* @author Keith Donald (2002-2020)
* @author Rod Johnson (2002-2020)
* @author Rob Harrop (2002-2020)
* @author Chris Beams (2002-2020)
* @author Sam Brannen (2002-2020)
* @author Jose Montoya
* @since 0.3.0
*/
public class Utils {
/**
* Check whether the given {@code String} contains actual text.
* More specifically, this method returns {@code true} if the
* {@code String} is not {@code null}, its length is greater than 0,
* and it contains at least one non-whitespace character.
*
* @param str the {@code String} to check (may be {@code null})
* @return {@code true} if the {@code String} is not {@code null}, its
* length is greater than 0, and it does not contain whitespace only
* see #hasText(CharSequence)
* see #hasLength(String)
* see Character#isWhitespace
*/
public static boolean hasText(@Nullable String str) {
return (str != null && !str.isEmpty() && containsText(str));
}
private static boolean containsText(CharSequence str) {
int strLen = str.length();
for (int i = 0; i < strLen; i++) {
if (!Character.isWhitespace(str.charAt(i))) {
return true;
}
}
return false;
}
/**
* Determine if the given objects are equal, returning {@code true} if
* both are {@code null} or {@code false} if only one is {@code null}.
*
* @param o1 first Object to compare
* @param o2 second Object to compare
* @return whether the given objects are equal
* @see Object#equals(Object)
*/
public static boolean nullSafeEquals(@Nullable Object o1, @Nullable Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null || o2 == null) {
return false;
}
return o1.equals(o2);
}
// ObjectUtils: end
}