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1   /***
2    * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
3    */
4   package net.sourceforge.pmd.rules;
5   
6   import net.sourceforge.pmd.AbstractRule;
7   import net.sourceforge.pmd.ast.ASTCompilationUnit;
8   import net.sourceforge.pmd.ast.ASTIfStatement;
9   
10  public class AvoidDeeplyNestedIfStmtsRule extends AbstractRule {
11  
12      private int depth;
13  
14      public Object visit(ASTCompilationUnit node, Object data) {
15          depth = 0;
16          return super.visit(node, data);
17      }
18  
19      public Object visit(ASTIfStatement node, Object data) {
20          if (!node.hasElse()) {
21              depth++;
22          }
23          super.visit(node, data);
24          if (depth == getIntProperty("problemDepth")) {
25              addViolation(data, node);
26          }
27          depth--;
28          return data;
29      }
30  
31  }