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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;

import org.ini4j.spi.IniBuilder;
import org.ini4j.spi.IniFormatter;
import org.ini4j.spi.IniHandler;
import org.ini4j.spi.IniParser;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;

import java.net.URL;

public class Ini extends BasicProfile implements Persistable, Configurable
{
    private static final long serialVersionUID = -6029486578113700585L;
    private Config _config;
    private File _file;

    public Ini()
    {
        _config = Config.getGlobal();
    }

    public Ini(Reader input) throws IOException, InvalidFileFormatException
    {
        this();
        load(input);
    }

    public Ini(InputStream input) throws IOException, InvalidFileFormatException
    {
        this();
        load(input);
    }

    public Ini(URL input) throws IOException, InvalidFileFormatException
    {
        this();
        load(input);
    }

    public Ini(File input) throws IOException, InvalidFileFormatException
    {
        this();
        _file = input;
        load();
    }

    @Override public Config getConfig()
    {
        return _config;
    }

    @Override public void setConfig(Config value)
    {
        _config = value;
    }

    @Override public File getFile()
    {
        return _file;
    }

    @Override public void setFile(File value)
    {
        _file = value;
    }

    @Override public void load() throws IOException, InvalidFileFormatException
    {
        if (_file == null)
        {
            throw new FileNotFoundException();
        }

        load(_file);
    }

    @Override public void load(InputStream input) throws IOException, InvalidFileFormatException
    {
        load(new InputStreamReader(input, getConfig().getFileEncoding()));
    }

    @Override public void load(Reader input) throws IOException, InvalidFileFormatException
    {
        IniParser.newInstance(getConfig()).parse(input, newBuilder());
    }

    @Override public void load(File input) throws IOException, InvalidFileFormatException
    {
        load(input.toURI().toURL());
    }

    @Override public void load(URL input) throws IOException, InvalidFileFormatException
    {
        IniParser.newInstance(getConfig()).parse(input, newBuilder());
    }

    @Override public void store() throws IOException
    {
        if (_file == null)
        {
            throw new FileNotFoundException();
        }

        store(_file);
    }

    @Override public void store(OutputStream output) throws IOException
    {
        store(new OutputStreamWriter(output, getConfig().getFileEncoding()));
    }

    @Override public void store(Writer output) throws IOException
    {
        store(IniFormatter.newInstance(output, getConfig()));
    }

    @Override public void store(File output) throws IOException
    {
        OutputStream stream = new FileOutputStream(output);

        store(stream);
        stream.close();
    }

    protected IniHandler newBuilder()
    {
        return IniBuilder.newInstance(this);
    }

    @Override protected void store(IniHandler formatter, Profile.Section section)
    {
        if (getConfig().isEmptySection() || (section.size() != 0))
        {
            super.store(formatter, section);
        }
    }

    @Override protected void store(IniHandler formatter, Profile.Section section, String option, int index)
    {
        if (getConfig().isMultiOption() || (index == (section.length(option) - 1)))
        {
            super.store(formatter, section, option, index);
        }
    }

    @Override boolean isTreeMode()
    {
        return getConfig().isTree();
    }

    @Override char getPathSeparator()
    {
        return getConfig().getPathSeparator();
    }

    @Override boolean isPropertyFirstUpper()
    {
        return getConfig().isPropertyFirstUpper();
    }
}