com.headstrong.fusion.statemachine.StateMachineErrorReporter.java Source code

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Here is the source code for com.headstrong.fusion.statemachine.StateMachineErrorReporter.java

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/*
 * The information in this document is subject to change without notice and 
 * does not represent a commitment by Headstrong Corporation. The software 
 * and/or databases described in this document are furnished under a license 
 * agreement and may be used or copied only in accordance with the terms of 
 * the agreement. 
 * 
 * Copyright  2008 Headstrong Corporation
 * All rights reserved.
 * 
 * $Id: StateMachineErrorReporter.java
 * $Revision: 
 * $Author: Ssoni
 * $DateTime: Mar 13, 2009 
 */

package com.headstrong.fusion.statemachine;

import java.io.Serializable;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import org.apache.commons.scxml.ErrorReporter;
import org.apache.commons.scxml.env.LogUtils;
import org.apache.commons.scxml.model.SCXML;
import org.apache.commons.scxml.model.State;
import org.apache.commons.scxml.model.TransitionTarget;
import org.apache.commons.scxml.semantics.ErrorConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Custom error reporter that logger execution errors.
 */
public class StateMachineErrorReporter implements ErrorReporter, Serializable {

    /** Serial version UID. */
    private static final long serialVersionUID = 1L;
    /** Log. */
    private static final Logger logger = LoggerFactory.getLogger(StateMachineErrorReporter.class);

    /**
     * @see ErrorReporter#onError(String, String, Object)
     */
    public void onError(final String errorCode, final String errDetail, final Object errCtx) {
        // Note: the if-then-else below is based on the actual usage
        // (codebase search), it has to be kept up-to-date as the code changes
        String errCode = errorCode.intern();
        StringBuffer msg = new StringBuffer();
        msg.append(errCode).append(" (");
        msg.append(errDetail).append("): ");
        if (errCode == ErrorConstants.NO_INITIAL) {
            if (errCtx instanceof SCXML) {
                // determineInitialStates
                msg.append("<SCXML>");
            } else if (errCtx instanceof State) {
                // determineInitialStates
                // determineTargetStates
                msg.append("State ").append(LogUtils.getTTPath((State) errCtx));
            }
        } else if (errCode == ErrorConstants.UNKNOWN_ACTION) {
            // executeActionList
            msg.append("Action: ").append(errCtx.getClass().getName());
        } else if (errCode == ErrorConstants.ILLEGAL_CONFIG) {
            // isLegalConfig
            if (errCtx instanceof Map.Entry) {
                TransitionTarget tt = (TransitionTarget) (((Map.Entry) errCtx).getKey());
                Set vals = (Set) (((Map.Entry) errCtx).getValue());
                msg.append(LogUtils.getTTPath(tt)).append(" : [");
                for (Iterator i = vals.iterator(); i.hasNext();) {
                    TransitionTarget tx = (TransitionTarget) i.next();
                    msg.append(LogUtils.getTTPath(tx));
                    if (i.hasNext()) {
                        msg.append(", ");
                    }
                }
                msg.append(']');
            } else if (errCtx instanceof Set) {
                Set vals = (Set) errCtx;
                msg.append("<SCXML> : [");
                for (Iterator i = vals.iterator(); i.hasNext();) {
                    TransitionTarget tx = (TransitionTarget) i.next();
                    msg.append(LogUtils.getTTPath(tx));
                    if (i.hasNext()) {
                        msg.append(", ");
                    }
                }
                msg.append(']');
            }
        }
        if (logger.isWarnEnabled()) {
            logger.warn(msg.toString());
        }
    }

}