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package rl;

import java.util.HashMap;

import java.util.Map;

/**

* Map-based Policy implementation. This implementation assumes

* that for each state only one action is possible

*/

public class PolicyImpl implements IPolicy {

/**

* constructor. Constructs and empty policy

*/

public PolicyImpl(){

this.policy = new HashMap<>();

}

/**

* Returns the size of the policy

* @return

*/

public int size(){

return this.policy.size();

}

/**

* Add a state-action

* @param state The state

* @param action The action

*/

@Override

public void addAction(IState state, IAction action){

policy.put(state, action);

}

/**

* Returns the action associated with the given state

* @param state The state

* @return IAction

*/

@Override

public IAction getAction(IState state){

return policy.get(state);

}

/**

* The mapping state-action

*/

Map<IState, IAction> policy;

}