wfexecutionobjectimpl.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

    public void setProcessContext(String contextKey) throws WfException, InvalidData, UpdateNotAllowed {            
        GenericValue dataObject = getRuntimeObject();

        try {
            dataObject.set("runtimeDataId", contextKey);
            dataObject.store();
        } catch (GenericEntityException e) {
            throw new WfException(e.getMessage(), e);
        }
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#contextKey()
     */
    public String contextKey() throws WfException {
        if (getRuntimeObject().get("runtimeDataId") == null)
            return null;
        else
            return getRuntimeObject().getString("runtimeDataId");
    }
 
    /**
     * @see org.ofbiz.workflow.WfExecutionObject#processContext()
     */
    public Map processContext() throws WfException {
        return getContext();
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#workflowStateType()
     */
    public List workflowStateType() throws WfException {
        String[] list = {"open", "closed"};
        return Arrays.asList(list);
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#terminate()
     */
    public void terminate() throws WfException, CannotStop, NotRunning {
        String stateStr = "closed.terminated";

        if (!state().equals("open.running"))
            throw new NotRunning();
        if (!validStates().contains(stateStr))
            throw new CannotStop();
        changeState(stateStr);
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#setDescription(java.lang.String)
     */
    public void setDescription(String newValue) throws WfException {
        GenericValue valueObject = getDefinitionObject();

        try {
            valueObject.set("description", newValue);
            valueObject.store();
        } catch (GenericEntityException e) {
            throw new WfException(e.getMessage(), e);
        }
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#description()
     */
    public String description() throws WfException {
        return getDefinitionObject().getString("description");
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#lastStateTime()
     */
    public Timestamp lastStateTime() throws WfException {
        GenericValue dataObject = getRuntimeObject();

        if (dataObject == null || dataObject.get("lastStatusUpdate") == null)
            throw new WfException("No runtime object or status has never been set.");
        return dataObject.getTimestamp("lastStatusUpdate");
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#getSequenceHistory(int)
     */
    public List getSequenceHistory(int maxNumber) throws WfException,
            HistoryNotAvailable {
        return history;
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#getIteratorHistory(java.lang.String, java.util.Map)
     */
    public Iterator getIteratorHistory(String query,
        Map namesInQuery) throws WfException, HistoryNotAvailable {
        return history.iterator();
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#resume()
     */
    public void resume() throws WfException, CannotResume, NotRunning, NotSuspended {
        if (!state().equals("open.not_running.suspended")) {
            if (state().equals("open.not_running.not_started")) {
                throw new NotRunning();
            } else if (state().startsWith("closed")) {
                throw new CannotResume();
            } else {
                throw new NotSuspended();
            }
        } else {
            changeState("open.running");
        }                                       
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#howClosedType()
     */
    public List howClosedType() throws WfException {
        String[] list = {"completed", "terminated", "aborted"};

        return Arrays.asList(list);
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#changeState(java.lang.String)
     */
    public void changeState(String newState) throws WfException, InvalidState, TransitionNotAllowed {            
        // Test is transaction is allowed???
        GenericValue dataObject = getRuntimeObject();

        if (validStates().contains(newState)) {
            try {
                long now = (new Date()).getTime();

                dataObject.set("currentStatusId", WfUtil.getOFBStatus(newState));
                dataObject.set("lastStatusUpdate", new Timestamp(now));
                dataObject.store();
            } catch (GenericEntityException e) {
                throw new WfException(e.getMessage(), e);
            }
        } else {
            throw new InvalidState();
        }
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#suspend()
     */
    public void suspend() throws WfException, CannotSuspend, NotRunning, AlreadySuspended {            
        changeState("open.not_running.suspended");
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#getDelegator()
     */
    public GenericDelegator getDelegator() throws WfException {
        return delegator;
    }

    /**
     * @see org.ofbiz.workflow.WfExecutionObject#getDefinitionObject()
     */
    public GenericValue getDefinitionObject() throws WfException {
        String entityName = activityId != null ? "WorkflowActivity" : "WorkflowProcess";
        GenericValue value = null;
        Map fields = UtilMisc.toMap("packageId", packageId, "packageVersion", packageVersion, "processId", processId,
                "processVersion", processVersion);

        if (activityId != null)
            fields.put("activityId", activityId);
        try {
            value = getDelegator().findByPrimaryKey(entityName, fields);
        } catch (GenericEntityException e) {
            throw new WfException(e.getMessage(), e);
        }
        return value;
    }

    public GenericValue getRuntimeObject() throws WfException {
        GenericValue value = null;

        try {
            value = getDelegator().findByPrimaryKey("WorkEffort",
                        UtilMisc.toMap("workEffortId", workEffortId));
        } catch (GenericEntityException e) {
            throw new WfException(e.getMessage(), e);
        }
        return value;
    }

    /**
     * Getter for this type of execution object.
     * @return String
     */
    public abstract String executionObjectType();

    /**
     * Updates the runtime data entity
     * @param field The field name of the entity (resultDataId,contextDataId)
     * @param value The value to serialize and set
     * @throws WfException
     */
    protected void setSerializedData(Map value) throws WfException, InvalidData {
        GenericValue runtimeData = null;
        GenericValue dataObject = getRuntimeObject();

        try {
            if (dataObject.get("runtimeDataId") == null) {
                String seqId = getDelegator().getNextSeqId("RuntimeData").toString();

                runtimeData = getDelegator().makeValue("RuntimeData",
                            UtilMisc.toMap("runtimeDataId", seqId));
                getDelegator().create(runtimeData);
                dataObject.set("runtimeDataId", seqId);
                dataObject.store();
            } else {
                runtimeData = dataObject.getRelatedOne("RuntimeData");
            }
            // String serialized = XmlSerializer.serialize(value);
            // System.out.println(serialized);

            runtimeData.set("runtimeInfo", XmlSerializer.serialize(value));
            runtimeData.store();
        } catch (GenericEntityException e) {
            throw new WfException(e.getMessage(), e);
        } catch (SerializeException e) {
            throw new InvalidData(e.getMessage(), e);
        } catch (FileNotFoundException e) {
            throw new InvalidData(e.getMessage(), e);
        } catch (IOException e) {
            throw new InvalidData(e.getMessage(), e);
        }
    }

    /**
     * Get an instance of the local dispatcher
     * @return LocalDispatcher instance for use with this workflow
     * @throws WfException
     */
    protected LocalDispatcher getDispatcher() throws WfException {
        try {
            return GenericDispatcher.getLocalDispatcher(dispatcherName, getDelegator());
        } catch (GenericServiceException e) {
            throw new WfException("No workflow service dispatcher", e);
        }
    }

    private Map getContext() throws WfException {
        GenericValue dataObject = getRuntimeObject();
        String contextXML = null;
        Map context = null;

        if (dataObject.get("runtimeDataId") == null)
            return context;
        try {
            GenericValue runtimeData = dataObject.getRelatedOne("RuntimeData");

            contextXML = runtimeData.getString("runtimeInfo");
        } catch (GenericEntityException e) {
            throw new WfException(e.getMessage(), e);
        }
        // De-serialize the context
        if (contextXML != null) {
            try {
                context = (Map) XmlSerializer.deserialize(contextXML, getDelegator());
            } catch (SerializeException e) {
                throw new WfException(e.getMessage(), e);
            } catch (IOException e) {
                throw new WfException(e.getMessage(), e);
            } catch (Exception e) {
                throw new WfException(e.getMessage(), e);
            }
        }
        return context;
    }
    
    private GenericValue getWorkEffort(String workEffortId) throws WfException {
        GenericValue we = null;
        try {
            we = getDelegator().findByPrimaryKey("WorkEffort", UtilMisc.toMap("workEffortId", workEffortId));
        } catch (GenericEntityException e) {
            throw new WfException("Problem getting WorkEffort entity (" + workEffortId + ")", e);
        }
        return we;
    }
            
    /**
     * Evaluate a condition expression using an implementation of TransitionCondition
     * @param className The class name of the TransitionCondition implementation
     * @param expression The expression to evaluate
     * @return The result of the evaluation (True/False)
     * @throws WfException
     */    
    protected boolean evalConditionClass(String className, String expression, Map context, Map attrs) throws WfException {
        // attempt to load and instance of the class
        Object conditionObject = null;
        try {
            conditionObject = ObjectType.getInstance(className);
        } catch (ClassNotFoundException e) {
            Debug.logError(e, "Cannot load class " + className, module);
            return false;           
        } catch (InstantiationException e) {
            Debug.logError(e, "Cannot get instance of class " + className, module);
            return false;            
        } catch (IllegalAccessException e) {
            Debug.logError(e, "Cannot access class " + className, module);
            return false;            
        }
                                
        // make sure we implement the TransitionCondition interface
        if (!ObjectType.instanceOf(conditionObject, "org.ofbiz.workflow.TransitionCondition")) {
            Debug.logError("Class " + className + " is not an instance of TransitionCondition", module);
            return false;
        }
        
        // cast to the interface
        TransitionCondition cond = (TransitionCondition) conditionObject;
        
        // trim up the expression if it isn't empty
        if (expression != null)
            expression = expression.trim();
        
        // get a DispatchContext object to pass over to the eval
        DispatchContext dctx = this.getDispatcher().getDispatchContext();
        
        // evaluate the condition
        Boolean evaluation = null;  
        try {               
            evaluation = cond.evaluateCondition(context, attrs, expression, dctx);
        } catch (EvaluationException e) {
            throw new WfException("Problems evaluating condition", e);
        }
        
        return evaluation.booleanValue();                            
    }      

    /**
     * Evaluate a condition expression using BeanShell
     * @param expression The expression to evaluate
     * @param context The context to use in evaluation
     * @return The result of the evaluation (True/False)
     * @throws WfException
     */
    protected boolean evalBshCondition(String expression, Map context) throws WfException {
        if (expression == null || expression.length() == 0) {
            Debug.logVerbose("Null or empty expression, returning true.", module);
            return true;
        }
        
        Object o = null;
        try {
            o = BshUtil.eval(expression.trim(), context);
        } catch (bsh.EvalError e) {
            throw new WfException("Bsh evaluation error.", e);
        }

        if (o == null)
            return false;
        else if (o instanceof Number)
            return (((Number) o).doubleValue() == 0) ? false : true;
        else
            return (!o.toString().equalsIgnoreCase("true")) ? false : true;
    }
}