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com.liferay.source.formatter.checks.JSPUnusedTermsCheck 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.StringBundler;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.io.unsync.UnsyncBufferedReader;
import com.liferay.portal.kernel.io.unsync.UnsyncStringReader;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.source.formatter.checks.util.JSPSourceUtil;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Hugo Huijser
*/
public class JSPUnusedTermsCheck extends BaseJSPTermsCheck {
@Override
protected String doProcess(
String fileName, String absolutePath, String content)
throws IOException {
populateContentsMap(fileName, content);
content = _removeUnusedImports(fileName, content);
content = JSPSourceUtil.compressImportsOrTaglibs(
fileName, content, "<%@ page import=");
content = JSPSourceUtil.compressImportsOrTaglibs(
fileName, content, "<%@ tag import=");
if (isPortalSource() || isSubrepository()) {
content = _removeUnusedPortletDefineObjects(fileName, content);
content = _removeDuplicateDefineObjects(fileName, content);
content = _removeUnusedTaglibs(fileName, content);
content = JSPSourceUtil.compressImportsOrTaglibs(
fileName, content, "<%@ taglib uri=");
content = _removeUnusedVariables(fileName, absolutePath, content);
}
put(fileName, content);
return content;
}
private void _addJSPUnusedImports(
String fileName, String content, List importLines,
List unneededImports) {
Set checkedFileNames = new HashSet<>();
Set includeFileNames = new HashSet<>();
for (String importLine : importLines) {
int x = importLine.indexOf(CharPool.QUOTE);
int y = importLine.indexOf(CharPool.QUOTE, x + 1);
if ((x == -1) || (y == -1)) {
continue;
}
String className = importLine.substring(x + 1, y);
className = className.substring(
className.lastIndexOf(CharPool.PERIOD) + 1);
if (hasUnusedJSPTerm(
fileName, content, "\\W" + className + "[^\\w\"]", "class",
checkedFileNames, includeFileNames, getContentsMap())) {
unneededImports.add(importLine);
}
}
}
private void _addJSPUnusedTaglibs(
String fileName, String content, List taglibLines,
List unneededTaglibs) {
Set checkedFileNames = new HashSet<>();
Set includeFileNames = new HashSet<>();
for (String taglibLine : taglibLines) {
int x = taglibLine.indexOf("prefix=\"");
int y = taglibLine.indexOf(CharPool.QUOTE, x + 8);
if ((x == -1) || (y == -1)) {
continue;
}
String prefix = taglibLine.substring(x + 8, y);
String regex = StringBundler.concat(
StringPool.LESS_THAN, prefix, ":|\\$\\{", prefix,
StringPool.COLON);
if (hasUnusedJSPTerm(
fileName, content, regex, "taglib", checkedFileNames,
includeFileNames, getContentsMap())) {
unneededTaglibs.add(taglibLine);
}
}
}
private List _getJSPDuplicateImports(
String fileName, String content, List importLines) {
List duplicateImports = new ArrayList<>();
for (String importLine : importLines) {
int x = content.indexOf("<%@ include file=");
if (x == -1) {
continue;
}
int y = content.indexOf("<%@ page import=");
if (y == -1) {
y = content.indexOf("<%@ tag import=");
if (y == -1) {
continue;
}
}
if ((x < y) && _isJSPDuplicateImport(fileName, importLine, false)) {
duplicateImports.add(importLine);
}
}
return duplicateImports;
}
private List _getJSPDuplicateTaglibs(
String fileName, String content, List taglibLines) {
List duplicateTaglibs = new ArrayList<>();
for (String taglibLine : taglibLines) {
int x = content.indexOf("<%@ include file=");
if (x == -1) {
continue;
}
int y = content.indexOf("<%@ taglib uri=");
if (y == -1) {
continue;
}
if ((x < y) && _isJSPDuplicateTaglib(fileName, taglibLine, false)) {
duplicateTaglibs.add(taglibLine);
}
}
return duplicateTaglibs;
}
private String _getVariableName(String line) {
Matcher matcher = _variableDeclarationPattern.matcher(line);
if (!matcher.find()) {
return null;
}
String typeName = matcher.group(1);
if (!typeName.equals("break") && !typeName.equals("continue") &&
!typeName.equals("return") && !typeName.equals("throw")) {
return matcher.group(2);
}
return null;
}
private boolean _hasUnusedPortletDefineObjectsProperty(
String fileName, String content, String portletDefineObjectProperty,
Set checkedFileNames, Set includeFileNames) {
return hasUnusedJSPTerm(
fileName, content, "\\W" + portletDefineObjectProperty + "\\W",
"portletDefineObjectProperty", checkedFileNames, includeFileNames,
getContentsMap());
}
private boolean _hasUnusedVariable(
String fileName, String content, String line, int lineNumber,
Set checkedFileNames, Set includeFileNames) {
String variableName = _getVariableName(line);
if (variableName == null) {
return false;
}
return hasUnusedJSPTerm(
fileName, content, "\\W" + variableName + "\\W", lineNumber,
"variable", checkedFileNames, includeFileNames, getContentsMap());
}
private boolean _isJSPDuplicateDefineObjects(
String fileName, String defineObjects, boolean checkFile) {
Map contentsMap = getContentsMap();
String content = contentsMap.get(fileName);
if (Validator.isNull(content)) {
return false;
}
if (checkFile && content.contains(defineObjects)) {
return true;
}
int x = content.indexOf("<%@ include file=");
if (x == -1) {
return false;
}
x = content.indexOf(CharPool.QUOTE, x);
if (x == -1) {
return false;
}
int y = content.indexOf(CharPool.QUOTE, x + 1);
if (y == -1) {
return false;
}
String includeFileName = content.substring(x + 1, y);
includeFileName = JSPSourceUtil.buildFullPathIncludeFileName(
fileName, includeFileName, getContentsMap());
return _isJSPDuplicateDefineObjects(
includeFileName, defineObjects, true);
}
private boolean _isJSPDuplicateImport(
String fileName, String importLine, boolean checkFile) {
Map contentsMap = getContentsMap();
String content = contentsMap.get(fileName);
if (Validator.isNull(content)) {
return false;
}
int x = importLine.indexOf("page");
if (x == -1) {
x = importLine.indexOf("tag");
if (x == -1) {
return false;
}
}
if (checkFile && content.contains(importLine.substring(x))) {
return true;
}
int y = content.indexOf("<%@ include file=");
if (y == -1) {
return false;
}
y = content.indexOf(CharPool.QUOTE, y);
if (y == -1) {
return false;
}
int z = content.indexOf(CharPool.QUOTE, y + 1);
if (z == -1) {
return false;
}
String includeFileName = content.substring(y + 1, z);
includeFileName = JSPSourceUtil.buildFullPathIncludeFileName(
fileName, includeFileName, getContentsMap());
return _isJSPDuplicateImport(includeFileName, importLine, true);
}
private boolean _isJSPDuplicateTaglib(
String fileName, String taglibLine, boolean checkFile) {
Map contentsMap = getContentsMap();
String content = contentsMap.get(fileName);
if (Validator.isNull(content)) {
return false;
}
int x = taglibLine.indexOf("taglib");
if (x == -1) {
return false;
}
if (checkFile && content.contains(taglibLine.substring(x))) {
return true;
}
int y = content.indexOf("<%@ include file=");
if (y == -1) {
return false;
}
y = content.indexOf(CharPool.QUOTE, y);
if (y == -1) {
return false;
}
int z = content.indexOf(CharPool.QUOTE, y + 1);
if (z == -1) {
return false;
}
String includeFileName = content.substring(y + 1, z);
includeFileName = JSPSourceUtil.buildFullPathIncludeFileName(
fileName, includeFileName, getContentsMap());
return _isJSPDuplicateTaglib(includeFileName, taglibLine, true);
}
private String _removeDuplicateDefineObjects(
String fileName, String content) {
Matcher matcher = _defineObjectsPattern.matcher(content);
while (matcher.find()) {
if (_isJSPDuplicateDefineObjects(
fileName, matcher.group(), false)) {
return StringUtil.replaceFirst(
content, matcher.group(), StringPool.BLANK,
matcher.start());
}
}
return content;
}
private String _removeUnusedImports(String fileName, String content)
throws IOException {
if (fileName.endsWith("init-ext.jsp")) {
return content;
}
Matcher matcher = _compressedJSPImportPattern.matcher(content);
if (!matcher.find()) {
return content;
}
String imports = matcher.group();
String newImports = StringUtil.replace(
imports, new String[] {"<%@\r\n", "<%@\n", " %><%@ "},
new String[] {"\r\n<%@ ", "\n<%@ ", " %>\n<%@ "});
List importLines = new ArrayList<>();
UnsyncBufferedReader unsyncBufferedReader = new UnsyncBufferedReader(
new UnsyncStringReader(newImports));
String line = null;
while ((line = unsyncBufferedReader.readLine()) != null) {
if (line.contains("import=")) {
importLines.add(line);
}
}
List unneededImports = _getJSPDuplicateImports(
fileName, content, importLines);
_addJSPUnusedImports(fileName, content, importLines, unneededImports);
for (String unneededImport : unneededImports) {
newImports = StringUtil.removeSubstring(newImports, unneededImport);
}
return StringUtil.replaceFirst(content, imports, newImports);
}
private String _removeUnusedPortletDefineObjects(
String fileName, String content) {
if (!content.contains(" checkedFileNames = new HashSet<>();
Set includeFileNames = new HashSet<>();
for (String portletDefineObjectProperty :
_PORTLET_DEFINE_OBJECTS_PROPERTIES) {
if (!_hasUnusedPortletDefineObjectsProperty(
fileName, content, portletDefineObjectProperty,
checkedFileNames, includeFileNames)) {
return content;
}
}
return StringUtil.removeSubstring(content, " taglibLines = new ArrayList<>();
UnsyncBufferedReader unsyncBufferedReader = new UnsyncBufferedReader(
new UnsyncStringReader(newTaglibs));
String line = null;
while ((line = unsyncBufferedReader.readLine()) != null) {
if (line.contains("uri=")) {
taglibLines.add(line);
}
}
List unneededTaglibs = _getJSPDuplicateTaglibs(
fileName, content, taglibLines);
_addJSPUnusedTaglibs(fileName, content, taglibLines, unneededTaglibs);
for (String unneededTaglib : unneededTaglibs) {
newTaglibs = StringUtil.removeSubstring(newTaglibs, unneededTaglib);
}
return StringUtil.replaceFirst(content, taglibs, newTaglibs);
}
private String _removeUnusedVariables(
String fileName, String absolutePath, String content)
throws IOException {
if (absolutePath.contains("/src/main/resources/alloy_mvc/jsp/") &&
absolutePath.endsWith(".jspf")) {
return content;
}
Set checkedFileNames = new HashSet<>();
Set includeFileNames = new HashSet<>();
StringBundler sb = new StringBundler();
try (UnsyncBufferedReader unsyncBufferedReader =
new UnsyncBufferedReader(new UnsyncStringReader(content))) {
int lineNumber = 0;
String line = null;
boolean javaSource = false;
boolean unusedVariable = false;
while ((line = unsyncBufferedReader.readLine()) != null) {
lineNumber++;
String trimmedLine = StringUtil.trimLeading(line);
if (trimmedLine.equals("<%") || trimmedLine.equals("<%!")) {
javaSource = true;
}
else if (trimmedLine.equals("%>")) {
javaSource = false;
}
if (javaSource &&
!isExcludedPath(
_UNUSED_VARIABLES_EXCLUDES, absolutePath, lineNumber) &&
_hasUnusedVariable(
fileName, content, trimmedLine, lineNumber,
checkedFileNames, includeFileNames)) {
unusedVariable = true;
}
if (unusedVariable) {
if (trimmedLine.endsWith(";")) {
unusedVariable = false;
}
continue;
}
sb.append(line);
sb.append("\n");
}
}
content = sb.toString();
if (content.endsWith("\n")) {
content = content.substring(0, content.length() - 1);
}
return content;
}
private static final String[] _PORTLET_DEFINE_OBJECTS_PROPERTIES = {
"actionRequest", "actionResponse", "eventRequest", "eventResponse",
"liferayPortletRequest", "liferayPortletResponse", "portletConfig",
"portletName", "portletPreferences", "portletPreferencesValues",
"portletSession", "portletSessionScope", "renderResponse",
"renderRequest", "resourceRequest", "resourceResponse"
};
private static final String _UNUSED_VARIABLES_EXCLUDES =
"jsp.unused.variables.excludes";
private static final Pattern _compressedJSPImportPattern = Pattern.compile(
"(<.*\n*(?:page|tag) import=\".*>\n*)+", Pattern.MULTILINE);
private static final Pattern _compressedJSPTaglibPattern = Pattern.compile(
"(<.*\n*taglib uri=\".*>\n*)+", Pattern.MULTILINE);
private static final Pattern _defineObjectsPattern = Pattern.compile(
"<[\\w-]+:defineObjects />");
private static final Pattern _variableDeclarationPattern = Pattern.compile(
"^([\\w<>,\\s]+?)\\s(\\w+)( =\\s|;)");
}
