net.hasor.dataql.fx.basic.CompareUdfSource Maven / Gradle / Ivy
/*
* Copyright 2008-2009 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.
*/
package net.hasor.dataql.fx.basic;
import net.hasor.dataql.UdfSourceAssembly;
import javax.inject.Singleton;
/**
* 比较函数。函数库引入 import 'net.hasor.dataql.fx.basic.CompareUdfSource' as compare;
* @author 赵永春 ([email protected])
* @version : 2020-03-31
*/
@Singleton
@Deprecated
public class CompareUdfSource implements UdfSourceAssembly {
/**
* Compares two strings lexicographically.
* The comparison is based on the Unicode value of each character in
* the strings. The character sequence represented by this
* {@code String} object is compared lexicographically to the
* character sequence represented by the argument string. The result is
* a negative integer if this {@code String} object
* lexicographically precedes the argument string. The result is a
* positive integer if this {@code String} object lexicographically
* follows the argument string. The result is zero if the strings
* are equal; {@code compareTo} returns {@code 0} exactly when
* the {@link #equals(Object)} method would return {@code true}.
*
* This is the definition of lexicographic ordering. If two strings are
* different, then either they have different characters at some index
* that is a valid index for both strings, or their lengths are different,
* or both. If they have different characters at one or more index
* positions, let k be the smallest such index; then the string
* whose character at position k has the smaller value, as
* determined by using the < operator, lexicographically precedes the
* other string. In this case, {@code compareTo} returns the
* difference of the two character values at position {@code k} in
* the two string -- that is, the value:
*
* this.charAt(k)-anotherString.charAt(k)
*
* If there is no index position at which they differ, then the shorter
* string lexicographically precedes the longer string. In this case,
* {@code compareTo} returns the difference of the lengths of the
* strings -- that is, the value:
*
* this.length()-anotherString.length()
*
*
* @param str1 the {@code String} to be compared.
* @param str2 the {@code String} to be compared.
* @return the value {@code 0} if the argument string is equal to
* this string; a value less than {@code 0} if this string
* is lexicographically less than the string argument; and a
* value greater than {@code 0} if this string is
* lexicographically greater than the string argument.
*/
public static int compareString(String str1, String str2) {
return StringUdfSource.compareString(str1, str2);
}
/**
* Compares two strings lexicographically, ignoring case
* differences. This method returns an integer whose sign is that of
* calling {@code compareTo} with normalized versions of the strings
* where case differences have been eliminated by calling
* {@code Character.toLowerCase(Character.toUpperCase(character))} on
* each character.
*
* Note that this method does not take locale into account,
* and will result in an unsatisfactory ordering for certain locales.
* The java.text package provides collators to allow
* locale-sensitive ordering.
*
* @param str1 the {@code String} to be compared.
* @param str2 the {@code String} to be compared.
* @return a negative integer, zero, or a positive integer as the
* specified String is greater than, equal to, or less
* than this String, ignoring case considerations.
* @see java.text.Collator#compare(String, String)
* @since 1.2
*/
public static int compareStringIgnoreCase(String str1, String str2) {
return StringUdfSource.compareStringIgnoreCase(str1, str2);
}
}