我想在 checkstyle 中添加自定义规则，以便我可以在 codacy Dashboard 中查看它们。但它也没有显示在 codacy 仪表板中，并且在 android studio 中也出现错误，请在下面找到详细信息。我编写了一个自定义类，它扩展了 Check 类，但无法在 checkstyle.xml 中添加该类。它显示在此处输入图像描述错误无法实例化该类。
<?xml version="1.0"?><!DOCTYPE module PUBLIC
"-//Puppy Crawl//DTD Check Configuration 1.2//EN"
"http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
<module name="Checker">
<module name="NewlineAtEndOfFile" />
<module name="FileLength" />
<module name="FileTabCharacter" />
<module name="TreeWalker">
<module name="packageName.MethodCallWithoutObjectCreation" />
<module name="ArrayTypeStyle" />
<module name="UpperEll" />
<module name="Indentation">
<property name="caseIndent" value="4" />
</module>
</module>
上面提到的模块可以在下面作为 java 类 MethodCallWithoutObjectCreation.java 找到
public class MethodCallWithoutObjectCreation extends Check {
@Override
public int[] getDefaultTokens() {
return new int[]{TokenTypes.METHOD_DEF};
}
/**
* @see com.puppycrawl.tools.checkstyle.api.Check#visitToken(com.puppycrawl.tools.checkstyle.api.DetailAST)
*/
@Override
public void visitToken(DetailAST aast) {
super.visitToken(aast);
DetailAST slist = aast.findFirstToken(TokenTypes.SLIST);
List<DetailAST> variables = DetailASTUtil.getDetailASTsForTypeInBranch(
slist, TokenTypes.VARIABLE_DEF);
List<DetailAST> uninitializedVars = new ArrayList<DetailAST>();
for (DetailAST variable : variables) {
boolean initialized = JavaClassUtil
.isVariableInitialized(variable);
if (!initialized)
uninitializedVars.add(variable);
}
for (DetailAST uninitializedVar : uninitializedVars) {
String uninitializedVarName = uninitializedVar.findFirstToken(
TokenTypes.IDENT).getText();
List<DetailAST> siblingsBelow = DetailASTUtil
.getAllSiblingsBelow(uninitializedVar);
List<FullIdentComparable> methodCallsFullIdents = new ArrayList<FullIdentComparable>();
List<FullIdentComparable> assignmentFullIdents = new ArrayList<FullIdentComparable>();
for (DetailAST siblingBelow : siblingsBelow) {
getListOfMethodCallsOnVariable(uninitializedVarName,
siblingBelow, methodCallsFullIdents);
getListOfVariableAssignment(uninitializedVarName, siblingBelow,
assignmentFullIdents);
}
Collections.sort(methodCallsFullIdents);
Collections.sort(assignmentFullIdents);
FullIdentComparable assignFullIdent = null;
if (assignmentFullIdents.size() > 0) {
assignFullIdent = assignmentFullIdents.get(0);
}
FullIdentComparable methodCallFullIdent = null;
if (methodCallsFullIdents.size() > 0)
methodCallFullIdent = methodCallsFullIdents.get(0);
if (methodCallFullIdent != null
&& (methodCallFullIdent.compareTo(assignFullIdent) < 0))
log(uninitializedVar, "Method called without checking null "
+ methodCallFullIdent.getFullIdent().getText());
}
}
private void getListOfMethodCallsOnVariable(String uninitializedVarName,
DetailAST siblingBelow,
List<FullIdentComparable> methodCallsFullIdents) {
List<DetailAST> dotsInBranch = DetailASTUtil
.getDetailASTsForTypeInBranch(siblingBelow, TokenTypes.DOT);
for (DetailAST dotInBranch : dotsInBranch) {
List<DetailAST> dotChildren = DetailASTUtil
.getDetailASTsForTypeInChildren(dotInBranch,
TokenTypes.IDENT);
if (dotChildren != null) {
DetailAST dotChild = dotChildren.get(0);
if (dotChild.getText().equals(uninitializedVarName)) {
FullIdent fullIdent = FullIdent
.createFullIdent(dotInBranch);
methodCallsFullIdents
.add(new FullIdentComparable(fullIdent));
}
}
}
}
private void getListOfVariableAssignment(String uninitializedVarName,
DetailAST siblingBelow,
List<FullIdentComparable> assignmentFullIdents) {
List<DetailAST> assignmentsInBranch = DetailASTUtil
.getDetailASTsForTypeInBranch(siblingBelow, TokenTypes.ASSIGN);
for (DetailAST assignInBranch : assignmentsInBranch) {
DetailAST ident = assignInBranch.findFirstToken(TokenTypes.IDENT);
if (ident != null) {
if (ident.getText().equals(uninitializedVarName)) {
FullIdent fullIdent = FullIdent
.createFullIdent(assignInBranch);
assignmentFullIdents
.add(new FullIdentComparable(fullIdent));
}
}
}
}
}