org.sonar.java.checks.DoubleBraceInitializationCheck Maven / Gradle / Ivy

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/*
 * SonarQube Java
 * Copyright (C) 2012-2024 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
 *
 * This program 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 Sonar Source-Available License for more details.
 *
 * You should have received a copy of the Sonar Source-Available License
 * along with this program; if not, see https://sonarsource.com/license/ssal/
 */
package org.sonar.java.checks;

import org.sonar.check.Rule;
import org.sonar.plugins.java.api.IssuableSubscriptionVisitor;
import org.sonar.plugins.java.api.tree.ClassTree;
import org.sonar.plugins.java.api.tree.NewClassTree;
import org.sonar.plugins.java.api.tree.Tree;

import java.util.Collections;
import java.util.List;

@Rule(key = "S3599")
public class DoubleBraceInitializationCheck extends IssuableSubscriptionVisitor {

  @Override
  public List nodesToVisit() {
    return Collections.singletonList(Tree.Kind.NEW_CLASS);
  }

  @Override
  public void visitNode(Tree tree) {
    ClassTree classBody = ((NewClassTree) tree).classBody();
    if (classBody != null) {
      List members = classBody.members();
      if (members.size() == 1 && members.get(0).is(Tree.Kind.INITIALIZER)) {
        reportIssue(classBody, "Use another way to initialize this instance.");
      }
    }
  }

}