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com.liferay.source.formatter.checks.BaseIfStatementCheck Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.source.formatter.checks;
import com.liferay.petra.string.CharPool;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.Validator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Hugo Huijser
*/
public abstract class BaseIfStatementCheck extends BaseFileCheck {
protected void checkIfClauseParentheses(
String ifClause, String fileName, int lineNumber,
boolean checkMissingParentheses) {
ifClause = stripQuotes(ifClause);
if (ifClause.matches(
"[^()]*\\((\\(?\\w+ instanceof \\w+\\)?( \\|\\| )?)+" +
"\\)[^()]*") &&
!ifClause.matches("[^()]*\\([^()]*\\)[^()]*")) {
addMessage(fileName, "Redundant parentheses", lineNumber);
return;
}
if (ifClause.contains(StringPool.DOUBLE_SLASH) ||
ifClause.contains("/*") || ifClause.contains("*/")) {
return;
}
if (checkMissingParentheses) {
_checkMissingParentheses(ifClause, fileName, lineNumber);
}
if (_hasRedundantParentheses(ifClause, "||", "&&") ||
_hasRedundantParentheses(ifClause, "&&", "||")) {
addMessage(fileName, "Redundant parentheses", lineNumber);
return;
}
int x = ifClause.indexOf(StringPool.OPEN_PARENTHESIS);
while (true) {
x = ifClause.indexOf(StringPool.OPEN_PARENTHESIS, x + 1);
if (x == -1) {
return;
}
char previousChar = ifClause.charAt(x - 1);
if ((previousChar != CharPool.EXCLAMATION) &&
(previousChar != CharPool.OPEN_PARENTHESIS) &&
(previousChar != CharPool.SPACE)) {
continue;
}
if (previousChar == CharPool.SPACE) {
String s = StringUtil.trim(ifClause.substring(0, x - 1));
if (Character.isLetterOrDigit(s.charAt(s.length() - 1))) {
continue;
}
}
int y = x;
while (true) {
y = ifClause.indexOf(StringPool.CLOSE_PARENTHESIS, y + 1);
String s = ifClause.substring(x + 1, y);
if (getLevel(s) != 0) {
continue;
}
char nextChar = ifClause.charAt(y + 1);
if ((previousChar == CharPool.OPEN_PARENTHESIS) &&
(nextChar == CharPool.CLOSE_PARENTHESIS)) {
addMessage(fileName, "Redundant parentheses", lineNumber);
return;
}
if (((nextChar == CharPool.CLOSE_PARENTHESIS) ||
(nextChar == CharPool.SPACE)) &&
_hasRedundantParentheses(s)) {
addMessage(fileName, "Redundant parentheses", lineNumber);
return;
}
break;
}
}
}
private void _checkMissingParentheses(
String ifClause, String fileName, int lineNumber) {
int x = -1;
while (true) {
int y = ifClause.indexOf("||", x + 1);
int z = ifClause.indexOf("&&", x + 1);
if ((y == -1) || (z == -1)) {
break;
}
String s = ifClause.substring(Math.min(y, z), Math.max(y, z));
if (getLevel(s) == 0) {
addMessage(fileName, "Missing parentheses", lineNumber);
return;
}
x = Math.min(y, z);
}
outerLoop:
while (true) {
Matcher matcher = _methodCallPattern.matcher(ifClause);
if (!matcher.find()) {
break;
}
x = matcher.start() + 1;
while (true) {
x = ifClause.indexOf(StringPool.CLOSE_PARENTHESIS, x + 1);
if (x == -1) {
break outerLoop;
}
String s = ifClause.substring(matcher.start() + 1, x + 1);
if (getLevel(s) == 0) {
ifClause = StringUtil.replaceFirst(
ifClause, s, StringPool.BLANK, matcher.start());
break;
}
}
}
int previousParenthesisPos = -1;
for (int i = 0; i < ifClause.length(); i++) {
char c = ifClause.charAt(i);
if ((c != CharPool.OPEN_PARENTHESIS) &&
(c != CharPool.CLOSE_PARENTHESIS)) {
continue;
}
if (previousParenthesisPos != -1) {
String s = ifClause.substring(previousParenthesisPos + 1, i);
if (_hasMissingParentheses(s)) {
addMessage(fileName, "Missing parentheses", lineNumber);
return;
}
}
previousParenthesisPos = i;
}
}
private boolean _hasMissingParentheses(String s) {
if (Validator.isNull(s)) {
return false;
}
boolean containsAndOperator = s.contains("&&");
boolean containsOrOperator = s.contains("||");
if (containsAndOperator && containsOrOperator) {
return true;
}
boolean containsCompareOperator = false;
if (s.contains(" == ") || s.contains(" != ") || s.contains(" < ") ||
s.contains(" > ") || s.contains(" =< ") || s.contains(" => ") ||
s.contains(" <= ") || s.contains(" >= ")) {
containsCompareOperator = true;
}
boolean containsMathOperator = false;
if (s.contains(" = ") || s.contains(" - ") || s.contains(" + ") ||
s.contains(" & ") || s.contains(" % ") || s.contains(" * ") ||
s.contains(" / ")) {
containsMathOperator = true;
}
if (containsCompareOperator &&
(containsAndOperator || containsOrOperator ||
(containsMathOperator && !s.contains(StringPool.OPEN_BRACKET)))) {
return true;
}
if (s.contains(" ? ") &&
(containsAndOperator || containsCompareOperator ||
containsOrOperator)) {
return true;
}
return false;
}
private boolean _hasRedundantParentheses(String s) {
//if (s.matches("\\w+ instanceof \\w+")) {
// return true;
//}
int x = -1;
while (true) {
x = s.indexOf(StringPool.SPACE, x + 1);
if (x == -1) {
break;
}
if (getLevel(s.substring(0, x)) == 0) {
return false;
}
}
return true;
}
private boolean _hasRedundantParentheses(
String s, String operator1, String operator2) {
while (true) {
int x = s.indexOf("!(");
if (x == -1) {
break;
}
int y = x;
while (true) {
y = s.indexOf(")", y + 1);
String linePart = s.substring(x, y + 1);
if (getLevel(linePart) == 0) {
break;
}
}
s = StringUtil.replaceFirst(s, ")", StringPool.BLANK, y);
s = StringUtil.replaceFirst(s, "!(", StringPool.BLANK, x);
}
String[] parts = StringUtil.split(s, operator1);
if (parts.length < 3) {
return false;
}
for (int i = 1; i < (parts.length - 1); i++) {
String part = parts[i];
if (part.contains(operator2)) {
continue;
}
if (Math.abs(getLevel(part)) == 1) {
return true;
}
}
return false;
}
private static final Pattern _methodCallPattern = Pattern.compile("\\w\\(");
}
