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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.checks.methods.AbstractMethodDetection;
import org.sonar.java.checks.methods.MethodMatcher;
import org.sonar.java.checks.methods.TypeCriteria;
import org.sonar.java.tag.Tag;
import org.sonar.plugins.java.api.semantic.Type;
import org.sonar.plugins.java.api.tree.ExpressionTree;
import org.sonar.plugins.java.api.tree.MethodInvocationTree;
import org.sonar.squidbridge.annotations.ActivatedByDefault;
import org.sonar.squidbridge.annotations.SqaleConstantRemediation;
import org.sonar.squidbridge.annotations.SqaleSubCharacteristic;

import java.util.List;

@Rule(
  key = "S2441",
  name = "Non-serializable objects should not be stored in \"HttpSessions\"",
  priority = Priority.CRITICAL,
  tags = {Tag.BUG, Tag.CWE})
@ActivatedByDefault
@SqaleSubCharacteristic(RulesDefinition.SubCharacteristics.DATA_RELIABILITY)
@SqaleConstantRemediation("20min")
public class SerializableObjectInSessionCheck extends AbstractMethodDetection {


  @Override
  protected List getMethodInvocationMatchers() {
    return ImmutableList.of(MethodMatcher.create().typeDefinition("javax.servlet.http.HttpSession")
      .name("setAttribute").addParameter("java.lang.String").addParameter(TypeCriteria.anyType()));
  }

  @Override
  protected void onMethodInvocationFound(MethodInvocationTree mit) {
    ExpressionTree argument = mit.arguments().get(1);
    Type type = argument.symbolType();
    if (!type.isPrimitive() && !type.isSubtypeOf("java.io.Serializable")) {
      addIssue(argument, "Make \"" + type + "\" serializable or don't store it in the session.");
    }
  }
}