src/main/java/org/wltea/analyzer/core/LexemePath.java
int getXWeight(){
		int product = 1;
		Cell c = this.getHead();
		while( c != null && c.getLexeme() != null){
			product *= c.getLexeme().getLength();
			c = c.getNext();
		}
		return product;
	}
int getXWeight(){
		int product = 1;
		Cell c = this.getHead();
		while( c != null && c.getLexeme() != null){
			product *= c.getLexeme().getLength();
			c = c.getNext();
		}
		return product;
	}
int getXWeight ( ) { int product = 1 ; Cell c = this . getHead ( ) ; while ( c != null && c . getLexeme ( ) != null ) { product *= c . getLexeme ( ) . getLength ( ) ; c = c . getNext ( ) ; } return product ; }
X权重（词元长度积）
@return
X权重（词元长度积）