com.bpodgursky.jbool_expressions.ExprUtil Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of analytics-plugin Show documentation

Kill Bill Analytics plugin

There is a newer version: 8.1.2

package com.bpodgursky.jbool_expressions;

import java.util.*;

public class ExprUtil {

  public static  Expression[] allExceptMatch(Expression[] exprs, Expression omit){
    Set> andTerms = new HashSet>();
    for(Expression eachExpr: exprs){
      if(!eachExpr.equals(omit)){
        andTerms.add(eachExpr);
      }
    }

    int i = 0;
    Expression[] result = expr(andTerms.size());
    for(Expression expr: andTerms){
      result[i++] = expr;
    }
    return result;
  }

  @SuppressWarnings("unchecked")
  public static  Expression[] expr(int length){
    return new Expression[length];
  }

  public static  void addAll(Collection> set, Expression[] values){
    Collections.addAll(set, values);
  }

  @SuppressWarnings("unchecked")
  public static  List> list(Expression... exprs){
    return Arrays.>asList(exprs);
  }

  public static  Set getVariables(Expression expr){
    if(expr instanceof Variable){
      return Collections.singleton(((Variable) expr).getValue());
    }else if(expr instanceof Not){
      return getVariables(((Not) expr).getE());
    }else if(expr instanceof NExpression){
      Set vars = new HashSet();
      for(Expression child: ((NExpression)expr).expressions){
        vars.addAll(getVariables(child));
      }
      return vars;
    }
    return Collections.emptySet();
  }
}