import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
/**
 * {@inheritDoc}
 */
@Override
protected PatternParser createPatternParser(String pattern) {
    return new PatternClientParser(pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
public
PatternParser createPatternParser(String pattern) {
  return new MyPatternParser(
    pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
@Override
protected PatternParser createPatternParser(String pattern) {
	return new CorrelationPatternParser(pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
@Override
protected PatternParser createPatternParser(String pattern) {
    return new TraceIdPatternParser(pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
public PatternParser createPatternParser(String pattern) {
    return new CounterPatternParser(pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
@Override
public PatternParser createPatternParser(String pattern) {
    return new CounterPatternParser(pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
@Override
protected PatternParser createPatternParser(String pattern) {
    return new ExtendedPatternParser(pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
/**
 * @param pattern
 * @return
 * @see org.apache.log4j.PatternLayout#createPatternParser(java.lang.String)
 */
@Override
protected PatternParser createPatternParser(final String pattern)
{
	return new EscapedPatternParser(pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
/**
 * Returns PatternParser used to parse the conversion string. Subclasses 
 * may override this to return a subclass of PatternParser which recognize 
 * custom conversion characters.
 */
protected PatternParser createPatternParser(final String pattern)
{
   return new ExtendedPatternParser(pattern);
}
 

import org.apache.log4j.helpers.PatternParser; //导入依赖的package包/类
/**
  Returns PatternParser used to parse the conversion string. Subclasses
  may override this to return a subclass of PatternParser which recognize
  custom conversion characters.

  @since 0.9.0
*/
protected PatternParser createPatternParser(String pattern) {
  return new PatternParser(pattern);
}