ConfigSection.java

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 * and open the template in the editor.
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package com.gmail.entityreborn.launchii.config;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 *
 * @author __import__
 */
public class ConfigSection {
    private Map<String, Object> children;
    private ConfigurationFile manager;
    private ConfigSection parent;
    private String name;
    
    /**
     * 
     * @param d Incoming data for this section
     * @param man Controlling manager for this instance
     */
    public ConfigSection(Map<String, ?> d, ConfigurationFile man, ConfigSection p, String n) {
        parent = p;
        name = n;
        manager = man;
        children = new HashMap<String, Object>();
        parseChildren(d);
    }
    
    public ConfigSection getParent() {
        return parent;
    }
    
    public String getSectionID() {
        return name;
    }
    
    /**
     * Clone the current section. Will probably orphan the new instance.
     * @return 
     */
    @Override
    public ConfigSection clone() {
       return new ConfigSection(asMap(), manager, parent, name); 
    }
    
    /**
     * Clone the current section, and set a new manager.
     * @param man
     * @return
     */
    public ConfigSection clone(ConfigurationFile man) {
       return new ConfigSection(asMap(), man, parent, name); 
    }
    
    /**
     * Merge everything from map into the current section
     * @param map Incoming data
     */
    public void merge(Map<String, Object> map) {
        for (String key : map.keySet()) {
            Object o = map.get(key);
            
            if (o instanceof Map) {
                ConfigSection c = getChildSection(key, true);
                if (c == null) {
                    continue;
                }
                
                c.merge((Map<String, Object>)o);
            } else {
                set(key, o);
            }
        }
    }
    
    /**
     * 
     * @param sect
     */
    public void merge(ConfigSection sect) {
        merge(sect.asMap());
    }
    
    public ConfigSection getRootSection() {
        return manager.rootSection();
    }
    
    public ConfigurationFile getManager() {
        return manager;
    }
    
    public boolean has(String key){
        return children.containsKey(key);
    }
    
    public Object get(String key) {
        return children.get(key);
    }
    
    public Object getRecursive(String key) {
        if (has(key)) {
            if (key.contains(".")) {
                int lastdot = key.lastIndexOf(".");
                String nodes = key.substring(0, lastdot);
                String newkey = key.substring(lastdot + 1, key.length());
                ConfigSection sect = getChildSection(nodes, false);

                return sect.getRecursive(newkey);
            } else {
                return children.get(key);
            }
        }
        
        return null;
    }
    
    public void set(String key, Object value) {
        children.put(key, value);
    }
    
    public void setRecursive(String key, Object value) {
        if (key.contains(".")) {
            int lastdot = key.lastIndexOf(".");
            String nodes = key.substring(0, lastdot);
            String newkey = key.substring(lastdot + 1, key.length());
            
            ConfigSection sect = getChildSection(nodes, true);
            sect.set(newkey, value);
        } else {
            children.put(key, value);
        }
    }
    
    public ConfigSection getConfigSection(String key) {
        return getChildSection(key, false);
    }
    
    protected ConfigSection getChildSection(String key, boolean create) {
        String[] nodes = key.split("\\.", 2);
        
        if (nodes.length == 2) {
            if (create && !has(nodes[0])) {
                setMap(nodes[0], new HashMap<String, Object>());
            }

            return ((ConfigSection)getRecursive(nodes[0])).getChildSection(nodes[1], create);
        } else {
            if (create && (!has(nodes[0]) || !(get(nodes[0]) instanceof ConfigSection))) {
                setMap(nodes[0], new HashMap<String, Object>());
            }
            
            return (ConfigSection)get(nodes[0]);
        }
    }
    
    protected final void parseChildren(Map<String, ?> data){
        if (data == null) {
            data = new HashMap<String, Object>();
        }
        
        for (String key: data.keySet()) {
            Object o = data.get(key);
            
            if (o instanceof Map) {
                ConfigSection conf = new ConfigSection(
                    ((Map<String, ?>)o), manager,
                    parent, name);
                set(key, conf);
            } else {
                set(key, o);
            }
        }
    }
    
    public void delete(String key) {
        children.remove(key);
    }

    public Map<String, Object> asMap() {
        Map<String, Object> map = new HashMap<String, Object>();
        for (String key: children.keySet()) {
            Object x = children.get(key);
            
            if (x instanceof ConfigSection) {
                map.put(key, ((ConfigSection)x).asMap());
            } else {
                map.put(key, children.get(key));
            }
        }
        
        return map;
    }
    
    public void setMap(String key, Map<String, Object> map) {
        ConfigSection conf = new ConfigSection(
                map, manager, parent, key);
        set(key, conf);
    }
    
    public Map<String, Object> getMap(String key, Map def) {
        if (!has(key)) {
            return def;
        }
        try {
            return ((ConfigSection)(get(key))).asMap();
        } catch (NullPointerException e) {
            return def;
        }
    }

    public boolean getBool(String key, boolean def) {
        Boolean b;
        if (!has(key)) {
            return def;
        }
        try {
            b = (Boolean)get(key);
        } catch (NullPointerException e) {
            return def;
        }
        return b.booleanValue();
    }
    
    public void setBool(String key, boolean bool) {
        Boolean b = Boolean.valueOf(bool);
        set(key, b);
    }
    
    public int getInt(String key, int def) {
        Integer i;
        if (!has(key)) {
            return def;
        }
        try {
            i = (Integer)get(key);
        } catch (NullPointerException e) {
            return def;
        }
        return i.intValue();
    }
    
    public void setInt(String key, int val) {
        Integer i = Integer.valueOf(val);
        set(key, i);
    }
    
    public float getFloat(String key, float def) {
        Float f;
        if (!has(key)) {
            return def;
        }
        try {
            f = (Float)get(key);
        } catch (NullPointerException e) {
            return def;
        }
        return f.floatValue();
    }
    
    public void setFloat(String key, float val) {
        Float f = Float.valueOf(val);
        set(key, f);
    }
    
    public String getString(String key, String def) {
        if (!has(key)) {
            return def;
        }
        try {
            return (String)get(key);
        } catch (NullPointerException e) {
            return def;
        }
    }
    
    public void setString(String key, String val) {
        set(key, val);
    }
    
    public List getList(String key, List def) {
        List<?> l;
        if (!has(key)) {
            return def;
        }
        try {
            l = (List<?>)get(key);
        } catch (NullPointerException e) {
            return def;
        }
        return l;
    }
    
    public void setList(String key, List<?> l) {
        set(key, l);
    }
    
    public Set<String> getKeys() {
        return children.keySet();
    }
    
    public Set<String> getKeys(String key) {
        return ((ConfigSection)(get(key))).getKeys();
    }
}

ConfigurationFile.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.gmail.entityreborn.launchii.config;

import java.io.*;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.Yaml;

/**
 *
 * @author __import__
 */
public class ConfigurationFile {
    private String filename;
    private ConfigSection root;
    
    /**
     * 
     * @param fname
     * @throws FileNotFoundException
     */
    public ConfigurationFile(String fname) throws FileNotFoundException {
        filename = fname;
        reload();
    }
    
    /**
     * 
     * @param stream
     * @throws FileNotFoundException
     */
    public ConfigurationFile(InputStream stream) throws FileNotFoundException {
        reload(stream);
    }
    
    /**
     * 
     * @param file
     * @throws IOException  
     */
    public ConfigurationFile(File file) throws IOException {
        reload(file);
    }
    
    /**
     * 
     * @param sect
     */
    public void setDefaults(ConfigSection sect) {
        sect.merge(root);
        root = sect.clone(this);
    }
    
    /**
     * 
     * @param stream
     */
    public final void reload(InputStream stream) {
        Yaml yaml = new Yaml();
        Map<String, Object> data = (Map<String, Object>) yaml.load(stream);
        root = new ConfigSection(data, this, null, "");
    }
    
    /**
     * 
     * @param file
     * @throws IOException  
     */
    public final void reload(File file) throws IOException {
        if (!file.exists()) {
            file.createNewFile();
        }
        reload(new FileInputStream(file));
        filename = file.getPath();
    }
    
    /**
     * 
     * @throws FileNotFoundException
     */
    public final void reload() throws FileNotFoundException {
        FileInputStream f = new FileInputStream(filename);
        reload(f);
    }
    
    /**
     * 
     * @param stream
     */
    public void save(OutputStreamWriter stream) {
        DumperOptions options = new DumperOptions();
        options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
        Yaml yaml = new Yaml(options);
        yaml.dump(root.asMap(), stream);
    }
    
    /**
     * 
     * @param file 
     */
    public void save(File file) {
        OutputStreamWriter stream = null;
        try {
            stream = new FileWriter(file);
        } catch (IOException ex) {
            Logger.getLogger(ConfigurationFile.class.getName()).log(Level.SEVERE, ex.getMessage(), ex);
        }
        
        if (stream != null)
            save(stream);
    }
    
    /**
     * 
     */
    public void save() {
        FileWriter f = null;
        try {
            f = new FileWriter(filename);
        } catch (IOException ex) {
            Logger.getLogger(ConfigurationFile.class.getName()).log(Level.SEVERE, ex.getMessage(), ex);
        }
        
        if (f != null)
            save(f);
    }
    
    /**
     * 
     * @return
     */
    public ConfigSection rootSection() {
        return root;
    }
    
    /**
     * 
     * @param node
     * @return
     */
    public ConfigSection getChildSection(String node) {
        String nodes = node;
        ConfigSection current = root;
        
        while (!nodes.isEmpty()) {
            String[] splitnodes = nodes.split("\\.", 2);
            current = current.getChildSection(splitnodes[0], false);
            
            if (splitnodes.length == 2) {
                nodes = splitnodes[1];
            } else {
                break; 
            }
        }
        
        return current;
    }
}

usage.java

File launcherDir = Paths.getLauncherDataDir();
        launcherDir.mkdirs();
        InputStream defaultsFile = Launchii.class.getResourceAsStream("/resources/defaults.yml");
        File optionsFile = new File(launcherDir, "config.yml");
        
        ConfigurationFile defaults = new ConfigurationFile(defaultsFile);
        try {
            config = new ConfigurationFile(optionsFile);
        } catch (IOException ex) {
            Logger.getLogger(Launchii.class.getName()).log(Level.SEVERE, "Could not load config file! (" + new File("config.yml").getAbsolutePath(), ex);
        }

        config.setDefaults(defaults.rootSection());