CmdUtil.java

package com.sleepycat.je.utilint;
import java.io.File;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.config.EnvironmentParams;
import com.sleepycat.je.dbi.EnvironmentImpl;
import de.ovgu.cide.jakutil.*;
/** 
 * Convenience methods for command line utilities.
 */
public class CmdUtil {
  public static String getArg(  String[] argv,  int whichArg) throws IllegalArgumentException {
    if (whichArg < argv.length) {
      return argv[whichArg];
    }
 else {
      throw new IllegalArgumentException();
    }
  }
  /** 
 * Parse a string into a long. If the string starts with 0x, this is a hex
 * number, else it's decimal.
 */
  public static long readLongNumber(  String longVal){
    if (longVal.startsWith("0x")) {
      return Long.parseLong(longVal.substring(2),16);
    }
 else {
      return Long.parseLong(longVal);
    }
  }
  private static final String printableChars="!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
  public static void formatEntry(  StringBuffer sb,  byte[] entryData,  boolean formatUsingPrintable){
    for (int i=0; i < entryData.length; i++) {
      int b=entryData[i] & 0xff;
      if (formatUsingPrintable) {
        if (isPrint(b)) {
          if (b == 0134) {
            sb.append('\\');
          }
          sb.append(printableChars.charAt(b - 33));
        }
 else {
          sb.append('\\');
          String hex=Integer.toHexString(b);
          if (b < 16) {
            sb.append('0');
          }
          sb.append(hex);
        }
      }
 else {
        String hex=Integer.toHexString(b);
        if (b < 16) {
          sb.append('0');
        }
        sb.append(hex);
      }
    }
  }
  private static boolean isPrint(  int b){
    return (b < 0177) && (040 < b);
  }
  /** 
 * Create an environment suitable for utilities. Utilities should in
 * general send trace output to the console and not to the db log.
 */
  public static EnvironmentImpl makeUtilityEnvironment(  File envHome,  boolean readOnly) throws DatabaseException {
    EnvironmentConfig config=new EnvironmentConfig();
    config.setReadOnly(readOnly);
    hook853(config);
    hook854(config);
    hook855(config);
    config.setConfigParam(EnvironmentParams.ENV_RECOVERY.getName(),"false");
    EnvironmentImpl envImpl=new EnvironmentImpl(envHome,config);
    return envImpl;
  }
  /** 
 * Returns a description of the java command for running a utility, without
 * arguments.  For utilities the last name of the class name can be
 * specified when "-jar je.jar" is used.
 */
  public static String getJavaCommand(  Class cls){
    String clsName=cls.getName();
    String lastName=clsName.substring(clsName.lastIndexOf('.') + 1);
    return "java { " + cls.getName() + " | -jar je.jar "+ lastName+ " }";
  }
  protected static void hook853(  EnvironmentConfig config) throws DatabaseException {
  }
  protected static void hook854(  EnvironmentConfig config) throws DatabaseException {
  }
  protected static void hook855(  EnvironmentConfig config) throws DatabaseException {
  }
}