package aima.core.search.nondeterministic;
/**
* Represents an if-state-then-plan statement for use with AND-OR search;
* explanation given on page 135 of AIMA3e.
*
* @author Andrew Brown
*/
public class IfStateThenPlan {
private Object state;
private Plan plan;
/**
* Constructor
*
* @param state
* @param plan
*/
public IfStateThenPlan(Object state, Plan plan) {
this.state = state;
this.plan = plan;
}
/**
* Uses this if-state-then-plan return a result based on the given state
*
* @param state
* @return the plan if the given state matches, null otherwise.
*/
public Plan ifStateMatches(Object state) {
if (this.state.equals(state)) {
return this.plan;
} else {
return null;
}
}
/**
* Return string representation of this if-then-else
*
* @return a string representation of this if-then-else.
*/
@Override
public String toString() {
StringBuilder s = new StringBuilder();
s.append("if ");
s.append(this.state);
s.append(" then ");
s.append(this.plan);
return s.toString();
}
}