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The Adobe Experience Manager SDK
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/*************************************************************************
 *
 * ADOBE CONFIDENTIAL
 * __________________
 *
 *  Copyright 2012 Adobe Systems Incorporated
 *  All Rights Reserved.
 *
 * NOTICE:  All information contained herein is, and remains
 * the property of Adobe Systems Incorporated and its suppliers,
 * if any.  The intellectual and technical concepts contained
 * herein are proprietary to Adobe Systems Incorporated and its
 * suppliers and are protected by trade secret or copyright law.
 * Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained
 * from Adobe Systems Incorporated.
 **************************************************************************/
package com.adobe.granite.workflow.exec;

import org.osgi.annotation.versioning.ProviderType;
import com.adobe.granite.workflow.HasMetaData;
import com.adobe.granite.workflow.model.WorkflowModel;
import com.adobe.granite.workflow.model.WorkflowNode;

import java.util.Date;

/**
 * 
 * A WorkItem is the unit that is passed through an
 * {@link Workflow} instance of a
 * {@link WorkflowModel}.
 * 

 * It contains the {@link WorkflowData} the instances acts on and
 * a reference to the {@link WorkflowNode} that describes the underlying
 * workflow step.
 * 

 * A WorkItem can be considered as a token in a petri net that
 * flows through the net during execution.
 * 
 */
@ProviderType
public interface WorkItem extends InboxItem, HasMetaData {
    /**
     * Returns the start time of the WorkflowItem.
     *
     * @return The start time of the WorkflowItem.
     */
    Date getTimeStarted();

    /**
     * Returns the end time of the WorkflowItem.
     *
     * @return The end time of the WorkflowItem.
     */
    Date getTimeEnded();

    /**
     * Returns the {@link Workflow} instance assigned with this
     * WorkflowItem.
     *
     * @return Workflow of the workflow instance assigned with
     *         the WorkflowItem.
     */
    Workflow getWorkflow();

    /**
     * Returns the current {@link WorkflowNode} the
     * WorkflowItem is attached to.
     *
     * @return The current {@link WorkflowNode} of the
     *         WorkflowItem.
     */
    WorkflowNode getNode();

    /**
     * Returns the ID of the WorkflowItem.
     *
     * @return ID of the WorkflowItem.
     */
    String getId();

    /**
     * Returns the {@link WorkflowData} assigned to the
     * WorkflowItem.
     *
     * @return the {@link WorkflowData} of the
     *         WorkflowItem.
     */
    WorkflowData getWorkflowData();

    /**
     * Returns the currently assigned user, respectively the info in which inbox the WorkItem "resides".
     *
     * @return current assignee
     */
    String getCurrentAssignee();

    /**
     * Sets the due time of this workitem.
     * @param dueTime the new due time of this workitem
     */
    void setDueTime(Date dueTime);

    /**
     * Sets the progress begin time for this workitem.
     * @param progressBeginTime the time for when progress should start on this workitem.
     */
    void setProgressBeginTime(Date progressBeginTime);

    /**
     * Sets the priority for this workitem.
     * @see InboxItem#getPriority() for details
     * @param priority the priority of this task.
     */
    void setPriority(Priority priority);
}