source: fedd/abac-src/ttg/process/NodeOperation.java @ ab37086

package com.nailabs.abac.process;

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

/**
 * This is a specialized operation for transmitting a root node between
 * negotiators.
 */
public class NodeOperation implements Operation {
    /** The new node to construct */
    Goal goal;

    /** An optional processing state */
    ProcessingState state;

    /** a flag to denote whether this is a new (i.e. root) node or not */
    boolean isRoot = false;

    /** root node operation constructor */
    public NodeOperation(Goal g, ProcessingState ps, boolean isRoot) {
        goal = g;
        state = ps;
        this.isRoot = isRoot;
    }

    /** non-root, node state change operation */
    public NodeOperation(Goal g, ProcessingState ps) {
        goal = g;
        state = ps;
        isRoot = false;
    }
    
    /** Jared: Added this method to make XML processing easier */
    public NodeOperation() {
        goal = null;
        state = null;
    }
    
    /** Jared: Added this method to make XML processing easier */
    public void setGoal(Goal g) { goal = g; }
    
    /** Jared: Added this method to make XML processing easier */
    public void setProcessingState(ProcessingState ps) { state = ps; }
    
    /** Jared: Added this method to make XML processing easier */
    public void setRoot(boolean isRoot) { this.isRoot = isRoot; }

    /** public accessor method used for logging this node's goal */
    public Goal getGoal() { return goal; }

    /** public accessor method for determinig whether this is a root node */
    public boolean isRoot() { return isRoot; }

    /** public accessor method for finding the updated processing state */
    public ProcessingState getProcessingState() { return state; }

    /** 
     * Either add a new node to the root of the trust target graph or
     * update the processing state of an existing node.
     */
    public void perform(TTG graph) {
        StringBuffer buff;
        if(isRoot) {
            buff = new StringBuffer("adding root node ");
            buff.append(goal).append(" to ").append(graph);
            debug("root", buff.toString());
            graph.putRoot((TargetNode)graph.getNode((TrustTarget)goal));
        }
        buff = new StringBuffer("updating node ");
        buff.append(goal).append(" with ").append(state);
        debug("node", buff.toString());
        TTGNode node = graph.getNodeByHash(goal);
        //node.getProcessingState().update(state);
    node.updateProcessingState(state);
    }

    /** Friendly debugging convenience method */
    protected void debug(String level, String message) {
        StringBuffer buff = new StringBuffer("NodeOperation:");
        buff.append(message);
        Debug.debug(level, buff.toString());
    }

    public String toXML() {
        StringBuffer buff =  new StringBuffer("<NodeOperation");
        if(isRoot) {
            buff.append(" type=\"root\">\n");
        } else {
            buff.append(">\n");
        }
        buff.append("<TrustTarget>");
        buff.append(goal.toXML());
        buff.append("</TrustTarget>\n");
        buff.append(state.toXML());
        buff.append("</NodeOperation>\n");
        return buff.toString();
    }


    /** Converts this operation into a string */
    public String toString() {
        StringBuffer buff = new StringBuffer("[NodeOperation ");
        if(isRoot){
            buff.append("root = ").append(goal);
            if(state != null) {
                buff.append(", processing state = ").append(state);
            }
        }
        else {
            buff.append("node = ").append(goal);
            buff.append(", processing state = ").append(state);
        }
        buff.append("]");
        return buff.toString();
    }

}