+ this.label = label;\r
+ }\r
+ \r
+ public Expression (String expressionString) {\r
+ String[] parts = expressionString.split("[=~]");\r
+ this.leftEntity = parts[0];\r
+ this.operator = expressionString.contains("=") ? "=" : "~";\r
+ this.rightEntity = parts[1];\r
+ this.label=rightEntity;\r