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LineEnding.java
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LineEnding.java
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/*
* 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.revelc.code.formatter;
/**
* @author marvin.froeder
*/
public enum LineEnding {
AUTO(System.lineSeparator()), KEEP(null), LF("\n"), CRLF("\r\n"), CR("\r"), UNKNOWN(null);
private final String chars;
LineEnding(String value) {
this.chars = value;
}
public String getChars() {
return this.chars;
}
public boolean isSystem() {
return System.lineSeparator().equals(getChars());
}
/**
* Returns the most occurring line-ending characters in the file text or null if no line-ending occurs the most.
*/
public static LineEnding determineLineEnding(String fileDataString) {
int lfCount = 0;
int crCount = 0;
int crlfCount = 0;
for (int i = 0; i < fileDataString.length(); i++) {
char c = fileDataString.charAt(i);
if (c == '\r') {
if ((i + 1) < fileDataString.length() && fileDataString.charAt(i + 1) == '\n') {
crlfCount++;
i++;
} else {
crCount++;
}
} else if (c == '\n') {
lfCount++;
}
}
if (lfCount > crCount && lfCount > crlfCount) {
return LF;
} else if (crlfCount > lfCount && crlfCount > crCount) {
return CRLF;
} else if (crCount > lfCount && crCount > crlfCount) {
return CR;
}
return UNKNOWN;
}
}