package com.nailabs.abac.process;

import com.nailabs.abac.trust.*;
import com.nailabs.abac.test.*;
import java.util.*;

/**
 * A linking implication edge represents an edge in a trust target graph 
 * between a <CODE>LinkTTNode</CODE> and a <CODE>LinkingGoalNode</CODE>
 */
public class LinkingMonitorEdge extends EdgeOperation {
    /** Default constructor (used for TNT integration).*/  
    public LinkingMonitorEdge() {
        super();
        type = new String("LinkingMonitor");
    }
    
    /** Parsed element constructor */ 
    public LinkingMonitorEdge(TrustTarget parent, LinkingGoal child, 
                              ProcessingState state) {
        super(parent, child, state, null);
        type = "LinkingMonitor";
    }
    
    public void performAdditional(TTG graph) {
        LinkTTNode parent = (LinkTTNode)graph.getNodeByHash(getParent());
        LinkingGoalNode child = 
            (LinkingGoalNode)graph.getNodeByHash(getChild());

        parent.addChild(child);
        child.addParent(parent);
    }
    
    public void performNewAdditional(TTG graph) {
        LinkingGoalNode child = 
            (LinkingGoalNode)graph.getNodeByHash(getChild());
        if(child == null) {
            child = (LinkingGoalNode)TTGNode.createNode(getChild());
            child.getProcessingState().update(state);
            graph.putNodeByHash(child);
        }
        performAdditional(graph); 
    }

}