1、单例模式
所有的规则类都是单例模式，所以规则类中最好不要有成员变量。若无法避免时，则必须在节点扫描前清空成员变量的数据。例如
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| private List<String> methodNameList = new ArrayList<String>();
private List<VariableTree> variableTreeList = new ArrayList<VariableTree>();
public List<Tree.Kind> nodesToVisit() {
return ImmutableList.of(Tree.Kind.METHOD,Tree.Kind.VARIABLE);
}
@Override
public void visitNode(Tree tree) {
}
@Override
public void scanFile(JavaFileScannerContext context) {
methodNameList.clear();
variableTreeList.clear();
super.context = context;
super.scanFile(context);
}
|