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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.InvalidFileFormatException;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;

import java.net.URL;

import java.util.Locale;

abstract class AbstractParser
{
    private final String _comments;
    private Config _config = Config.getGlobal();
    private final String _operators;

    protected AbstractParser(String operators, String comments)
    {
        _operators = operators;
        _comments = comments;
    }

    protected Config getConfig()
    {
        return _config;
    }

    protected void setConfig(Config value)
    {
        _config = value;
    }

    protected void parseError(String line, int lineNumber) throws InvalidFileFormatException
    {
        throw new InvalidFileFormatException("parse error (at line: " + lineNumber + "): " + line);
    }

    IniSource newIniSource(InputStream input, HandlerBase handler)
    {
        return new IniSource(input, handler, _comments, getConfig());
    }

    IniSource newIniSource(Reader input, HandlerBase handler)
    {
        return new IniSource(input, handler, _comments, getConfig());
    }

    IniSource newIniSource(URL input, HandlerBase handler) throws IOException
    {
        return new IniSource(input, handler, _comments, getConfig());
    }

    void parseOptionLine(String line, HandlerBase handler, int lineNumber) throws InvalidFileFormatException
    {
        int idx = indexOfOperator(line);
        String name = null;
        String value = null;

        if (idx < 0)
        {
            if (getConfig().isEmptyOption())
            {
                name = line;
            }
            else
            {
                parseError(line, lineNumber);
            }
        }
        else
        {
            name = unescapeFilter(line.substring(0, idx)).trim();
            value = unescapeFilter(line.substring(idx + 1)).trim();
        }

        if (name.length() == 0)
        {
            parseError(line, lineNumber);
        }

        if (getConfig().isLowerCaseOption())
        {
            name = name.toLowerCase(Locale.getDefault());
        }

        handler.handleOption(name, value);
    }

    String unescapeFilter(String line)
    {
        return getConfig().isEscape() ? EscapeTool.getInstance().unescape(line) : line;
    }

    private int indexOfOperator(String line)
    {
        int idx = -1;

        for (char c : _operators.toCharArray())
        {
            int index = line.indexOf(c);

            if ((index >= 0) && ((idx == -1) || (index < idx)))
            {
                idx = index;
            }
        }

        return idx;
    }
}