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/*
 * SonarQube Java
 * Copyright (C) 2012 SonarSource
 * [email protected]
 *
 * This program 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 3 of the License, or (at your option) any later version.
 *
 * 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 GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */
package org.sonar.java.checks;

import com.google.common.collect.ImmutableList;
import org.sonar.api.server.rule.RulesDefinition;
import org.sonar.check.Priority;
import org.sonar.check.Rule;
import org.sonar.java.closeresource.CloseableVisitor;
import org.sonar.java.symexecengine.DataFlowVisitor;
import org.sonar.java.tag.Tag;
import org.sonar.plugins.java.api.semantic.Type;
import org.sonar.plugins.java.api.tree.MethodTree;
import org.sonar.plugins.java.api.tree.NewClassTree;
import org.sonar.plugins.java.api.tree.Tree;
import org.sonar.squidbridge.annotations.ActivatedByDefault;
import org.sonar.squidbridge.annotations.SqaleConstantRemediation;
import org.sonar.squidbridge.annotations.SqaleSubCharacteristic;

import java.util.List;

@Rule(
  key = "S2095",
  name = "Resources should be closed",
  priority = Priority.BLOCKER,
  tags = {Tag.BUG, Tag.CERT, Tag.CWE, Tag.DENIAL_OF_SERVICE, Tag.LEAK, Tag.SECURITY})
@ActivatedByDefault
@SqaleSubCharacteristic(RulesDefinition.SubCharacteristics.LOGIC_RELIABILITY)
@SqaleConstantRemediation("5min")
public class CloseResourceCheck extends SubscriptionBaseVisitor {

  @Override
  public List nodesToVisit() {
    return ImmutableList.of(Tree.Kind.METHOD);
  }

  @Override
  public void visitNode(Tree tree) {
    if (!hasSemantic()) {
      return;
    }
    CloseableVisitor visitor = new CloseableVisitor();
    DataFlowVisitor.analyze((MethodTree) tree, visitor);
    for (Tree issueTree : visitor.getIssueTrees()) {
      Type reportedType = null;
      if (issueTree.is(Tree.Kind.NEW_CLASS)) {
        reportedType = ((NewClassTree) issueTree).symbolType();
      }
      if (reportedType != null) {
        addIssue(issueTree, String.format("Close this \"%s\".", reportedType.name()));
      }
    }
  }

}