/*

  * Copyright 2005,2009 Ivan SZKIBA

  *

  * Licensed 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.

  */

 package org.ini4j;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.regex.Pattern;

 class BasicProfileSection extends BasicOptionMap implements Profile.Section

 {

     private static final long serialVersionUID = 985800697957194374L;

     private static final String[] EMPTY_STRING_ARRAY = {};

     private static final char REGEXP_ESCAPE_CHAR = '\\';

     private final Pattern _childPattern;

     private final String _name;

     private final BasicProfile _profile;

     protected BasicProfileSection(BasicProfile profile, String name)

     {

         _profile = profile;

         _name = name;

         _childPattern = newChildPattern(name);

     }

     @Override public Profile.Section getChild(String key)

     {

         return _profile.get(childName(key));

     }

     @Override public String getName()

     {

         return _name;

     }

     @Override public Profile.Section getParent()

     {

         Profile.Section ret = null;

         int idx = _name.lastIndexOf(_profile.getPathSeparator());

         if (idx >= 0)

         {

             String name = _name.substring(0, idx);

             ret = _profile.get(name);

         }

         return ret;

     }

     @Override public String getSimpleName()

     {

         int idx = _name.lastIndexOf(_profile.getPathSeparator());

         return (idx < 0) ? _name : _name.substring(idx + 1);

     }

     @Override public Profile.Section addChild(String key)

     {

         String name = childName(key);

         return _profile.add(name);

     }

     @Override public String[] childrenNames()

     {

         List<String> names = new ArrayList<String>();

         for (String key : _profile.keySet())

         {

             if (_childPattern.matcher(key).matches())

             {

                 names.add(key.substring(_name.length() + 1));

             }

         }

         return names.toArray(EMPTY_STRING_ARRAY);

     }

     @Override public Profile.Section lookup(String... parts)

     {

         StringBuilder buff = new StringBuilder();

         for (String part : parts)

         {

             if (buff.length() != 0)

             {

                 buff.append(_profile.getPathSeparator());

             }

             buff.append(part);

         }

         return _profile.get(childName(buff.toString()));

     }

     @Override public void removeChild(String key)

     {

         String name = childName(key);

         _profile.remove(name);

     }

     @Override boolean isPropertyFirstUpper()

     {

         return _profile.isPropertyFirstUpper();

     }

     @Override void resolve(StringBuilder buffer)

     {

         _profile.resolve(buffer, this);

     }

     private String childName(String key)

     {

         StringBuilder buff = new StringBuilder(_name);

         buff.append(_profile.getPathSeparator());

         buff.append(key);

         return buff.toString();

     }

     private Pattern newChildPattern(String name)

     {

         StringBuilder buff = new StringBuilder();

         buff.append('^');

         buff.append(Pattern.quote(name));

         buff.append(REGEXP_ESCAPE_CHAR);

         buff.append(_profile.getPathSeparator());

         buff.append("[^");

         buff.append(REGEXP_ESCAPE_CHAR);

         buff.append(_profile.getPathSeparator());

         buff.append("]+$");

         return Pattern.compile(buff.toString());

     }

 }