Examples of org.apache.log4j.config.PropertySetter

org.apache.log4j.config.PropertySetter
General purpose Object property setter. Clients repeatedly invokes {@link #setProperty setProperty(name,value)} in order to invoke setterson the Object specified in the constructor. This class relies on the JavaBeans {@link Introspector} to analyze the given Object Class usingreflection.
Usage:
```
 PropertySetter ps = new PropertySetter(anObject); ps.set("name", "Joe"); ps.set("age", "32"); ps.set("isMale", "true"); 
```
will cause the invocations anObject.setName("Joe"), anObject.setAge(32), and setMale(true) if such methods exist with those signatures. Otherwise an {@link IntrospectionException} are thrown. @author Anders Kristensen @since 1.1

        String clazz = subst(element.getAttribute("class"), props);
        Object instance = OptionConverter.instantiateByClassName(clazz,
                expectedClass, null);


        if (instance != null) {
            PropertySetter propSetter = new PropertySetter(instance);
            NodeList children = element.getChildNodes();
            final int length = children.getLength();


            for (int loop = 0; loop < length; loop++) {
                Node currentNode = children.item(loop);

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                          null);
            if(tr == null) {
                LogLog.error(
                    "Could not instantiate throwableRenderer.");
            } else {
                PropertySetter setter = new PropertySetter(tr);
                setter.setProperties(props, THROWABLE_RENDERER_PREFIX + ".");
                ((ThrowableRendererSupport) hierarchy).setThrowableRenderer(tr);


            }
          }
      }

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      String clazz = props.getProperty(key);
      if (clazz != null) {
        LogLog.debug("Filter key: ["+key+"] class: ["+props.getProperty(key) +"] props: "+filters.get(key));
        Filter filter = (Filter) OptionConverter.instantiateByClassName(clazz, Filter.class, null);
        if (filter != null) {
          PropertySetter propSetter = new PropertySetter(filter);
          Vector v = (Vector)filters.get(key);
          Enumeration filterProps = v.elements();
          while (filterProps.hasMoreElements()) {
            NameValue kv = (NameValue)filterProps.nextElement();
            propSetter.setProperty(kv.key, kv.value);
          }
          propSetter.activate();
          LogLog.debug("Adding filter of type ["+filter.getClass()
           +"] to appender named ["+appender.getName()+"].");
          appender.addFilter(filter);
        }
      } else {

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    String className = subst(appenderElement.getAttribute(CLASS_ATTR));
    LogLog.debug("Class name: [" + className+']');    
    try {
      Object instance   = Class.forName(className).newInstance();
      Appender appender  = (Appender)instance;
      PropertySetter propSetter = new PropertySetter(appender);


      appender.setName(subst(appenderElement.getAttribute(NAME_ATTR)));
      
      NodeList children  = appenderElement.getChildNodes();
      final int length   = children.getLength();


      for (int loop = 0; loop < length; loop++) {
  Node currentNode = children.item(loop);


  /* We're only interested in Elements */
  if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
    Element currentElement = (Element)currentNode;


    // Parse appender parameters 
    if (currentElement.getTagName().equals(PARAM_TAG)) {
            setParameter(currentElement, propSetter);
    }
    // Set appender layout
    else if (currentElement.getTagName().equals(LAYOUT_TAG)) {
      appender.setLayout(parseLayout(currentElement));
    }
    // Add filters
    else if (currentElement.getTagName().equals(FILTER_TAG)) {
      parseFilters(currentElement, appender);
    }
    else if (currentElement.getTagName().equals(ERROR_HANDLER_TAG)) {
      parseErrorHandler(currentElement, appender);
    }
    else if (currentElement.getTagName().equals(APPENDER_REF_TAG)) {
      String refName = subst(currentElement.getAttribute(REF_ATTR));
      if(appender instanceof AppenderAttachable) {
        AppenderAttachable aa = (AppenderAttachable) appender;
        LogLog.debug("Attaching appender named ["+ refName+
         "] to appender named ["+ appender.getName()+"].");
        aa.addAppender(findAppenderByReference(currentElement));
      } else {
        LogLog.error("Requesting attachment of appender named ["+
         refName+ "] to appender named ["+ appender.getName()+
                "] which does not implement org.apache.log4j.spi.AppenderAttachable.");
      }
    }
  }
      }
      propSetter.activate();
      return appender;
    }
    /* Yes, it's ugly.  But all of these exceptions point to the same
       problem: we can't create an Appender */
    catch (Exception oops) {

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                null);
    
    if(eh != null) {
      eh.setAppender(appender);


      PropertySetter propSetter = new PropertySetter(eh);
      NodeList children = element.getChildNodes();
      final int length   = children.getLength();


      for (int loop = 0; loop < length; loop++) {
  Node currentNode = children.item(loop);
  if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
    Element currentElement = (Element) currentNode;
    String tagName = currentElement.getTagName();
    if(tagName.equals(PARAM_TAG)) {
            setParameter(currentElement, propSetter);
    } else if(tagName.equals(APPENDER_REF_TAG)) {
      eh.setBackupAppender(findAppenderByReference(currentElement));
    } else if(tagName.equals(LOGGER_REF)) {
      String loggerName = currentElement.getAttribute(REF_ATTR);      
      Logger logger = repository.getLogger(loggerName);
      eh.setLogger(logger);
    } else if(tagName.equals(ROOT_REF)) {
      Logger root = repository.getRootLogger();
      eh.setLogger(root);
    }
  }
      }
      propSetter.activate();
      appender.setErrorHandler(eh);
    }
  }

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    String clazz = subst(element.getAttribute(CLASS_ATTR));
    Filter filter = (Filter) OptionConverter.instantiateByClassName(clazz,
                                                Filter.class, null);
    
    if(filter != null) {
      PropertySetter propSetter = new PropertySetter(filter);
      NodeList children = element.getChildNodes();
      final int length   = children.getLength();


      for (int loop = 0; loop < length; loop++) {
  Node currentNode = children.item(loop);
  if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
    Element currentElement = (Element) currentNode;
    String tagName = currentElement.getTagName();
    if(tagName.equals(PARAM_TAG)) {
            setParameter(currentElement, propSetter);
    } 
  }
      }
      propSetter.activate();
      LogLog.debug("Adding filter of type ["+filter.getClass()
       +"] to appender named ["+appender.getName()+"].");
      appender.addFilter(filter);
    }    
  }

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    else {
      LogLog.debug("Desired category factory: ["+className+']');
      Object catFactory = OptionConverter.instantiateByClassName(className, 
                                                                 LoggerFactory.class, 
                                                                 null);
      PropertySetter propSetter = new PropertySetter(catFactory);


      Element  currentElement = null;
      Node     currentNode    = null;
      NodeList children       = factoryElement.getChildNodes();
      final int length        = children.getLength();

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  */
  protected
  void parseChildrenOfLoggerElement(Element catElement,
              Logger cat, boolean isRoot) {
    
    PropertySetter propSetter = new PropertySetter(cat);
    
    // Remove all existing appenders from cat. They will be
    // reconstructed if need be.
    cat.removeAllAppenders();




    NodeList children   = catElement.getChildNodes();
    final int length   = children.getLength();
    
    for (int loop = 0; loop < length; loop++) {
      Node currentNode = children.item(loop);


      if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
  Element currentElement = (Element) currentNode;
  String tagName = currentElement.getTagName();
  
  if (tagName.equals(APPENDER_REF_TAG)) {
    Element appenderRef = (Element) currentNode;
    Appender appender = findAppenderByReference(appenderRef);
    String refName =  subst(appenderRef.getAttribute(REF_ATTR));
    if(appender != null)
      LogLog.debug("Adding appender named ["+ refName+ 
       "] to category ["+cat.getName()+"].");
    else 
      LogLog.debug("Appender named ["+ refName + "] not found.");
      
    cat.addAppender(appender);
    
  } else if(tagName.equals(LEVEL_TAG)) {
    parseLevel(currentElement, cat, isRoot);  
  } else if(tagName.equals(PRIORITY_TAG)) {
    parseLevel(currentElement, cat, isRoot);
  } else if(tagName.equals(PARAM_TAG)) {
          setParameter(currentElement, propSetter);
  }
      }
    }
    propSetter.activate();
  }

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    String className = subst(layout_element.getAttribute(CLASS_ATTR));
    LogLog.debug("Parsing layout of class: \""+className+"\"");     
    try {
      Object instance   = Class.forName(className).newInstance();
      Layout layout     = (Layout)instance;
      PropertySetter propSetter = new PropertySetter(layout);
      
      NodeList params   = layout_element.getChildNodes();
      final int length   = params.getLength();


      for (int loop = 0; loop < length; loop++) {
  Node currentNode = (Node)params.item(loop);
  if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
    Element currentElement = (Element) currentNode;
    String tagName = currentElement.getTagName();
    if(tagName.equals(PARAM_TAG)) {
            setParameter(currentElement, propSetter);
    }
  }
      }
      
      propSetter.activate();
      return layout;
    }
    catch (Exception oops) {
      LogLog.error("Could not create the Layout. Reported error follows.",
       oops);

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    LogLog.debug("Class name: [" + className + ']');


    try {
      Object instance = Loader.loadClass(className).newInstance();
      Appender appender = (Appender) instance;
      PropertySetter propSetter = new PropertySetter(appender);


      appender.setName(subst(appenderElement.getAttribute(NAME_ATTR)));


      NodeList children = appenderElement.getChildNodes();
      final int length = children.getLength();

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org.apache.joran.action.NestComponentIA

org.apache.joran.action.ParamAction

org.apache.log4j.extras.DOMConfigurator

org.apache.log4j.joran.action.NestComponentIA

org.apache.log4j.joran.action.ParamAction

org.apache.log4j.PropertyConfigurator

org.apache.log4j.spi.OptionHandler

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java.util.Enumeration

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