io.inversion.context.Escaper Maven / Gradle / Ivy
/*
* Copyright (c) 2015-2022 Rocket Partners, LLC
* https://github.com/inversion-api
*
* 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 io.inversion.context;
import io.inversion.utils.Utils;
import java.util.ArrayList;
import java.util.List;
public class Escaper {
/**
* Escapes '\', ',' and '=' characters with a '\'
*
* @param string
* @return
*/
public static String escape(String string) {
string = string.replace("\\", "\\\\");
string = string.replace(",", "\\,");
string = string.replace("=", "\\=");
return string;
}
/**
* Splits a string into chunks on '=' and ',' characters using '\' as an escape character.
*
* @param string
* @return
*/
public static List unescape(String string) {
List list = new ArrayList<>();
StringBuilder buff = new StringBuilder("");
boolean escaped = false;
for (int i = 0; i < string.length(); i++) {
char c = string.charAt(i);
switch (c) {
case '\\':
if (escaped) {
escaped = false;
buff.append(c);
} else {
escaped = true;
}
break;
case '=':
case ',':
if (escaped) {
buff.append(c);
escaped = false;
} else {
list.add(buff.toString());
buff = new StringBuilder("");
}
break;
default:
if(escaped)
throw Utils.ex("You have an invalid escape sequence in your string. ',' and '=' '\\' are the only characters that can be escaped. You may need to add a '\\' to escape a literal '\\' in your data");
buff.append(c);
}
}
if (buff.length() > 0)
list.add(buff.toString());
return list;
}
}