checkstyle-import-control.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE import-control PUBLIC
    "-//Puppy Crawl//DTD Import Control 1.1//EN"
    "http://www.puppycrawl.com/dtds/import_control_1_1.dtd">

<!--
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
-->

<import-control pkg="org">
  <!-- Allow all by default -->
  <allow pkg="java" />
  <allow pkg="javax" />
  <allow pkg="org" />
  <allow pkg="com" />
  <allow pkg="net" />
  <allow pkg="ch" />
  <allow pkg="junit" />
  <allow pkg="contribs" />

  <!-- Disallow sun.* imports as they are not guaranteed to be the same across all JVMs -->
  <disallow pkg="sun" />

  <!-- Disallow Servlet classes everywhere except in specific packages -->
  <disallow pkg="javax.servlet" />

  <!-- Disallow optional dependencies JPA, MongoDB, CouchDB, etc. everywhere except in specific packages -->
  <disallow pkg="javax.persistence" />
  <disallow pkg="com.mongodb" />
  <disallow pkg="org.bson" />
  <disallow pkg="org.lightcouch" />
  <disallow pkg="org.codehaus.jackson" />
  <disallow pkg="com.fasterxml.jackson" />

  <subpackage name="apache">

    <subpackage name="logging">

      <subpackage name="log4j">

        <subpackage name="core">

          <subpackage name="appender">

            <subpackage name="db">

              <subpackage name="jpa">
                <allow pkg="javax.persistence" />

                <subpackage name="converter">
                  <allow pkg="com.fasterxml.jackson" />
                </subpackage>
              </subpackage>

              <subpackage name="nosql">

                <subpackage name="mongo">
                  <allow pkg="com.mongodb" />
                  <allow pkg="org.bson" />
                </subpackage>

                <subpackage name="couch">
                  <allow pkg="org.lightcouch" />
                </subpackage>

              </subpackage>

            </subpackage>

          </subpackage>

          <subpackage name="config">
            <allow pkg="com.fasterxml.jackson" />
          </subpackage>

          <subpackage name="web">
            <allow pkg="javax.servlet" />
          </subpackage>

        </subpackage>

        <subpackage name="taglib">
          <allow pkg="javax.servlet" />
        </subpackage>

      </subpackage>

    </subpackage>

  </subpackage>

</import-control>