import org.apache.logging.log4j.core.config.plugins.PluginValue; //导入依赖的package包/类
@PluginFactory
public static Script createScript(
        // @formatter:off
        @PluginAttribute("name") final String name,
        @PluginAttribute(ATTR_LANGUAGE) String language,
        @PluginValue(ATTR_SCRIPT_TEXT) final String scriptText) {
        // @formatter:on
    if (language == null) {
        LOGGER.error("No '{}' attribute provided for {} plugin '{}'", ATTR_LANGUAGE, PLUGIN_NAME, name);
        language = DEFAULT_LANGUAGE;
    }
    if (scriptText == null) {
        LOGGER.error("No '{}' attribute provided for {} plugin '{}'", ATTR_SCRIPT_TEXT, PLUGIN_NAME, name);
        return null;
    }
    return new Script(name, language, scriptText);

}
 

import org.apache.logging.log4j.core.config.plugins.PluginValue; //导入依赖的package包/类
/**
 * Creates a Property.
 *
 * @param name The key.
 * @param value The value.
 * @return A Property.
 */
@PluginFactory
public static StaticField createStaticField(
        @PluginAttribute("name") final String name,
        @PluginValue("value") final String value) {
    if (name == null) {
        LOGGER.error("Property name cannot be null");
    }
    return new StaticField(name, value);
}
 

import org.apache.logging.log4j.core.config.plugins.PluginValue; //导入依赖的package包/类
/**
 * Create a Property.
 * @param key The key.
 * @param value The value.
 * @return A Property.
 */
@PluginFactory
public static Property createProperty(
        @PluginAttribute("name") final String key,
        @PluginValue("value")final String value) {
    if (key == null) {
        LOGGER.error("Property key cannot be null");
    }
    
    if(value.contains("${")){
    	List<String> keys = new ArrayList<String>();
    	List<String> values = new ArrayList<String>();
    	
    	String _value = value;
		Matcher m = pat.matcher(_value);		
		while(m.find()){		
			String _key = m.group();
			keys.add(_key);
			values.add(System.getProperty(_key.substring(2, _key.lastIndexOf('}'))));
		}
		for(int i = 0; i < keys.size(); i++){
			_value = _value.replaceAll("[${][^$]["+keys.get(i)+"]*}", values.get(i));
		}
    	return new Property(key, _value);
    }else{
    	return new Property(key, value);
    }
}
 

import org.apache.logging.log4j.core.config.plugins.PluginValue; //导入依赖的package包/类
/**
 * Create a Property.
 * @param key The key.
 * @param value The value.
 * @return A Property.
 */
@PluginFactory
public static Property createProperty(
        @PluginAttribute("name") final String key,
        @PluginValue("value") final String value) {
    if (key == null) {
        LOGGER.error("Property key cannot be null");
    }
    return new Property(key, value);
}
 

import org.apache.logging.log4j.core.config.plugins.PluginValue; //导入依赖的package包/类
/**
 * Creates a Property.
 *
 * @param name The key.
 * @param value The value.
 * @return A Property.
 */
@PluginFactory
public static Property createProperty(
        @PluginAttribute("name") final String name,
        @PluginValue("value") final String value) {
    if (name == null) {
        LOGGER.error("Property name cannot be null");
    }
    return new Property(name, value);
}
 

import org.apache.logging.log4j.core.config.plugins.PluginValue; //导入依赖的package包/类
@PluginFactory
public static Mask create(@PluginValue("value") final String value,
                          @PluginAttribute("enabled") final String enabled) {
    return new Mask(value, enabled != null && Boolean.parseBoolean(enabled));
}
 

import org.apache.logging.log4j.core.config.plugins.PluginValue; //导入依赖的package包/类
public PluginValueVisitor() {
    super(PluginValue.class);
}