ConfigParam.java

package com.sleepycat.je.config;
import de.ovgu.cide.jakutil.*;
/** 
 * A ConfigParam embodies the metatdata about a JE configuration parameter:
 * the parameter name, default value, and a validation method.
 * Validation can be done in the scope of this parameter, or as a function of
 * other parameters.
 */
public class ConfigParam {
  public static final String CONFIG_DELIM=";";
  String name;
  private String defaultValue;
  private String description;
  private boolean mutable;
  ConfigParam(  String configName,  String configDefault,  boolean mutable,  String description) throws IllegalArgumentException {
    name=configName;
    defaultValue=configDefault;
    this.mutable=mutable;
    this.description=description;
    validateName(configName);
    validateValue(configDefault);
    EnvironmentParams.addSupportedParam(this);
  }
  public String getName(){
    return name;
  }
  public String getDescription(){
    return description;
  }
  public String getExtraDescription(){
    return null;
  }
  public String getDefault(){
    return defaultValue;
  }
  public boolean isMutable(){
    return mutable;
  }
  /** 
 * Validate yourself.
 */
  public void validate() throws IllegalArgumentException {
    validateName(name);
    validateValue(defaultValue);
  }
  private void validateName(  String name) throws IllegalArgumentException {
    if ((name == null) || (name.length() < 1)) {
      throw new IllegalArgumentException(" A configuration parameter" + " name can't be null or 0" + " length");
    }
  }
  public void validateValue(  String value) throws IllegalArgumentException {
  }
  public String toString(){
    return name;
  }
}