/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.joran.action;
  
  
  import org.xml.sax.Attributes;
  
  import ch.qos.logback.core.joran.spi.InterpretationContext;
  import ch.qos.logback.core.joran.util.PropertySetter;
  
  
  
  public class ParamAction extends Action {
    static String NO_NAME = "No name attribute in <param> element";
    static String NO_VALUE = "No name attribute in <param> element";
    boolean inError = false;
  
    public void begin(
      InterpretationContext ec, String localName, Attributes attributes) {
      String name = attributes.getValue(NAME_ATTRIBUTE);
      String value = attributes.getValue(VALUE_ATTRIBUTE);
  
      if (name == null) {
        inError = true;
        addError(NO_NAME);
        return;
      }
  
      if (value == null) {
        inError = true;
        addError(NO_VALUE);
        return;
      }
  
      // remove both leading and trailing spaces
      value = value.trim();
  
      Object o = ec.peekObject();
      PropertySetter propSetter = new PropertySetter(o);
      propSetter.setContext(context);
      value = ec.subst(value);
  
      // allow for variable substitution for name as well
      name = ec.subst(name);
  
      //getLogger().debug(
      //  "In ParamAction setting parameter [{}] to value [{}].", name, value);
      propSetter.setProperty(name, value);
    }
  
    public void end(InterpretationContext ec, String localName) {
    }
  
    public void finish(InterpretationContext ec) {
    }
  }