readconfig.java

/**
 * $Id: $
 * $Date: $
 * 
 */

package org.xmlsh.internal.commands;

import java.util.List;
import java.util.Properties;
import org.apache.logging.log4j.LogManager;
import org.xmlsh.annotations.Command;
import org.xmlsh.core.InputPort;
import org.xmlsh.core.InvalidArgumentException;
import org.xmlsh.core.Options;
import org.xmlsh.core.XCommand;
import org.xmlsh.core.XConfiguration;
import org.xmlsh.core.XStringLookup;
import org.xmlsh.core.XValue;
import org.xmlsh.sh.shell.SerializeOpts;
import org.xmlsh.util.text.TextConfigParser;

@Command(name = "readconfig")

public class readconfig extends XCommand {
  public static org.apache.logging.log4j.Logger mLogger = LogManager
      .getLogger();

  private final class IniConfigParser extends TextConfigParser {
    @Override
    protected XValue parseValue(String currentSection, String name,
        String value) throws InvalidArgumentException {
      return XValue.newXValue(value);
    }
  }

  @Override
  public int run(List<XValue> args) throws Exception {

    mLogger.entry(args);

    Options opts = new Options(
        "format:,file:,+r=replace,default=default-section:,defaults=default-values:",
        SerializeOpts.getOptionDefs());
    opts.parse(args);
    setSerializeOpts(opts);
    String format = opts.getOptString("format", "text");
    args = opts.getRemainingArgs();
    if(args.size() != 1) {
      usage("[-format ini|xml|json] [-file file] variable");
      return mLogger.exit(1);
    }

    String defSection = opts.getOptString("default", "default");

    @SuppressWarnings("resource")
    InputPort in = opts.hasOpt("file") ? getInput(opts.getOptValue("file"))
        : getStdin();

    boolean bReplace = opts.getOptFlag("replace", true);

    XConfiguration config = null;

    String varName = args.get(0).toString();
    mShell.getEnv().unsetVar(varName);

    switch(format){
    case "text":
    case "ini":

      TextConfigParser parser = new IniConfigParser();
      config = parser.loadConfig(in.asReader(getSerializeOpts()));

      break;
    case "xml":
    case "json":
    default:
      usage("Unsupported format: " + format);
    }

    if(config == null) {
      printErr("Unknown error reading config file");
      return mLogger.exit(1);
    }

    config.setDefaultSectionName(defSection);

    XValue def = opts.getOptValue("defaults");
    if(bReplace)
      config = replaceVariables(config, def);

    mShell.getEnv().setVar(varName, config.asXValue());

    return mLogger.exit(0);

  }

  private XConfiguration replaceVariables(XConfiguration config, XValue def) {
    return config.replace(def == null ? null : XStringLookup.newInstance(def));

  }

  private void loadFromJSON(Properties props, InputPort in) {

  }

}

/*
 * Copyright (C) 2008-2012 David A. Lee.
 * 
 * The contents of this file are subject to the "Simplified BSD License" (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.opensource.org/licenses/bsd-license.php
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied.
 * See the License for the specific language governing rights and limitations
 * under the License.
 * 
 * The Original Code is: all this file.
 * 
 * The Initial Developer of the Original Code is David A. Lee
 * 
 * Portions created by (your name) are Copyright (C) (your legal entity). All
 * Rights Reserved.
 * 
 * Contributor(s): David A. Lee
 */