code: package formulae.cltloc.atoms;
  
  import com.google.common.base.Preconditions;
  
  import formulae.cltloc.CLTLocFormula;
  import formulae.cltloc.visitor.CLTLocVisitor;
  
  public class AssignVariable extends CLTLocFormula {
  
  	
  
  	public formulae.cltloc.atoms.Expression getExpression() {
  		return this.expression;
  	}
  
  	private final Variable variable;
  	private final formulae.cltloc.atoms.Expression expression;
  
  	public AssignVariable(Variable variable, formulae.cltloc.atoms.Expression nextVariable) {
  		super();
  		Preconditions.checkNotNull(variable, "The variable cannot be null");
  		this.variable = variable;
  		this.expression=nextVariable;
  	}
  
  	@Override
  	public int hashCode() {
  		final int prime = 31;
  		int result = 1;
  		result = prime * result + ((variable == null) ? 0 : variable.hashCode());
  		return result;
  	}
  
  	@Override
  	public boolean equals(Object obj) {
  		if (this == obj)
  			return true;
  		if (obj == null)
  			return false;
  		if (getClass() != obj.getClass())
  			return false;
  		AssignVariable other = (AssignVariable) obj;
  		if (variable == null) {
  			if (other.variable != null)
  				return false;
  		} else if (!variable.equals(other.variable))
  			return false;
  		return true;
  	}
  
  	@Override
  	public <T> T accept(CLTLocVisitor<T> t) {
  		return t.visit(this);
  	}
  
  	public Variable getVariable() {
  		return variable;
  	}
  	
  	@Override
  	public String toString() {
  		return "X("  + expression + ") = "+ variable;
  	}
  
  }
  