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Java API for handling configuration files in Windows .ini format. The library includes its own Map based API, Java Preferences API and Java Beans API for handling .ini files. Additionally, the library includes a feature rich (variable/macro substitution, multiply property values, etc) java.util.Properties replacement.

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/*
 * 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.spi;

import org.ini4j.Config;
import org.ini4j.Options;

public class OptionsBuilder implements OptionsHandler
{
    private boolean _header;
    private String _lastComment;
    private int _emptyLines = 0;
    private Options _options;

    public static OptionsBuilder newInstance(Options opts)
    {
        OptionsBuilder instance = newInstance();

        instance.setOptions(opts);

        return instance;
    }

    public void setOptions(Options value)
    {
        _options = value;
    }

    @Override public void endOptions()
    {

        // comment only .opt file ...
        if ((_lastComment != null) && _header)
        {
            setHeaderComment();
        }
    }

    @Override public void handleComment(String comment)
    {
        if ((_lastComment != null) && _header)
        {
            setHeaderComment();
            _header = false;
        }

        _lastComment = (_lastComment==null ? comment : _lastComment + getConfig().getLineSeparator() + comment);
    }

    @Override public void handleEmptyLine()
    {
        _emptyLines++;
    }

    @Override public void handleOption(String name, String value)
    {
        String newName = name;
        if (getConfig().isAutoNumbering() && name.matches("([^\\d]+\\.)+[\\d]+"))
        {
            String[] parts = name.split("\\.");
            newName = name.substring(0, name.length() - parts[parts.length - 1].length() - 1) + ".";
            int pos = Integer.parseInt(parts[parts.length - 1]);

            // check whether key has been added before
            if (!_options.containsKey(newName))
            {
                _options.add(newName, null);
            }

            // resize list for key if it is too small
            for (int i = _options.getAll(newName).size(); i <= pos; i++)
            {
                _options.add(newName, null);
            }

            _options.put(newName, value, pos);
        }
        else
        {
            if (getConfig().isMultiOption())
            {
                _options.add(newName, value);
            }
            else
            {
                _options.put(newName, value);
            }
        }

        if (_emptyLines > 0)
        {
            if (!_header)
            {
                putEmptyLines(newName);
            }
            _emptyLines = 0;
        }

        if (_lastComment != null)
        {
            if (_header)
            {
                setHeaderComment();
            }
            else
            {
                putComment(newName);
            }

            _lastComment = null;
        }

        _header = false;
    }

    @Override public void startOptions()
    {
        if (getConfig().isHeaderComment())
        {
            _header = true;
        }
    }

    protected static OptionsBuilder newInstance()
    {
        return ServiceFinder.findService(OptionsBuilder.class);
    }

    private Config getConfig()
    {
        return _options.getConfig();
    }

    private void setHeaderComment()
    {
        if (getConfig().isComment())
        {
            _options.setComment(_lastComment);
        }
    }

    private void putComment(String key)
    {
        if (getConfig().isComment() &&  _lastComment != null)
        {
            // TODO Handle comments between multi-options
            // (currently, the last one appeared replaces the others)
            _options.putComment(key, _lastComment);
        }
    }

    private void putEmptyLines(String key)
    {
        if (getConfig().isEmptyLines())
        {
            for (int i = 0; i < _emptyLines; i++)
            {
                _options.addEmptyLine(key);
            }
        }
    }
}