001/*
002 * Copyright 2005,2009 Ivan SZKIBA
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.ini4j.demo;
017
018import bsh.ConsoleInterface;
019import bsh.EvalError;
020import bsh.Interpreter;
021import bsh.NameSpace;
022
023import org.ini4j.Config;
024import org.ini4j.Ini;
025import org.ini4j.Options;
026import org.ini4j.Persistable;
027import org.ini4j.Reg;
028
029import java.io.IOException;
030import java.io.InputStream;
031import java.io.InputStreamReader;
032import java.io.Reader;
033import java.io.StringReader;
034
035public class DemoModel implements Runnable
036{
037    public static enum Mode
038    {
039        INI,
040        REG,
041        OPTIONS;
042    }
043
044    private Persistable _data;
045    private Interpreter _interpreter;
046    private Mode _mode = Mode.INI;
047
048    public DemoModel(ConsoleInterface console)
049    {
050        _interpreter = new Interpreter(console);
051        NameSpace namespace = _interpreter.getNameSpace();
052
053        namespace.importPackage("org.ini4j.spi");
054        namespace.importPackage("org.ini4j");
055        namespace.importPackage("org.ini4j.sample");
056    }
057
058    public Object getData()
059    {
060        return _data;
061    }
062
063    public Mode getMode()
064    {
065        return _mode;
066    }
067
068    public void setMode(Mode mode)
069    {
070        _mode = mode;
071    }
072
073    public void clear() throws EvalError
074    {
075        _interpreter.unset("data");
076    }
077
078    public String help() throws IOException
079    {
080        return readResource("help.txt");
081    }
082
083    public String load() throws IOException
084    {
085        return readResource(_mode.name().toLowerCase() + "-data.txt");
086    }
087
088    public void parse(String text) throws IOException, EvalError
089    {
090        Persistable data = newData();
091
092        data.load(new StringReader(text));
093        _interpreter.set("data", data);
094        _data = data;
095    }
096
097    @Override public void run()
098    {
099        _interpreter.setExitOnEOF(false);
100        _interpreter.run();
101    }
102
103    public String tip() throws IOException
104    {
105        return readResource(_mode.name().toLowerCase() + "-tip.txt");
106    }
107
108    private Persistable newData()
109    {
110        Persistable ret = null;
111
112        switch (_mode)
113        {
114
115            case INI:
116                ret = new Ini();
117                break;
118
119            case REG:
120                ret = new Reg();
121                break;
122
123            case OPTIONS:
124                ret = new Options();
125                break;
126        }
127
128        return ret;
129    }
130
131    private String readResource(String path) throws IOException
132    {
133        InputStream in = getClass().getResourceAsStream(path);
134        Reader reader = new InputStreamReader(in, Config.DEFAULT_FILE_ENCODING);
135        StringBuilder str = new StringBuilder();
136        char[] buff = new char[8192];
137        int n;
138
139        while ((n = reader.read(buff)) >= 0)
140        {
141            str.append(buff, 0, n);
142        }
143
144        return str.toString();
145    }
146}