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SQL Utilities including simple command line, schema management.

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package net.jmatrix.db.common;

import java.io.File;
import java.io.IOException;

/**
 * Reads and writes files to and from ~/.config/[app]. 
 * 
 */
public class DotConfig {
   String app=null;
   
   File dir=null;
   
   public DotConfig(String app) {
      this.app=app;
      init();
   }
   
   private void init() {
      dir=new File(System.getProperty("user.home")+"/.config/"+app);
      
      if (!dir.exists()) {
         dir.mkdirs();
      }
      
      if (dir.exists()) {
         if (!dir.canRead()) {
            throw new RuntimeException("Cannot read config dir at "+dir.getAbsolutePath());
         }
      } else {
         throw new RuntimeException("Config dir does not exist at "+dir.getAbsolutePath());
      }
   }
   
   public void write(String filename, String s) throws IOException {
      File f=new File(dir, filename);
      StreamUtil.write(s, f);
   }
   
   public String read(String filename) throws IOException {
      File f=new File(dir, filename);
      if (!f.exists()) {
         return null;
      }
      return StreamUtil.readToString(f);
   }
}