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/*
 * Copyright 2013 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.api.runtime.manager.audit;

import java.util.Date;
/**
 * Audit view of node instance where each node instance (in most of the cases) will have two entries:
 * 
 *  when node instance was triggered
 *  when node instance was left - completed
 *
 */
public interface NodeInstanceLog {

    /**
     * Indicates that node instance was triggered
     */
    public static final int TYPE_ENTER = 0;

    /**
     * Indicates that node instance was left (it's no more active)
     */
    public static final int TYPE_EXIT = 1;

    /**
     * @return process instance identifier
     */
    Long getProcessInstanceId();

    /**
     * @return id of the definition
     */
    String getProcessId();

    /**
     * @return identifier of the node instance
     */
    String getNodeInstanceId();

    /**
     * @return identifier of the node which usually is the unique identifier from process definition,
     * but can be unique identifier assigned by the engine when unique id is not available
     */
    String getNodeId();

    /**
     * @return name of the node from process definition
     */
    String getNodeName();

    /**
     * @return date on when this node was triggered
     */
    Date getDate();

    /**
     * @return identifier of work item that this node refers to, might be null if it's not work item based node
     */
    Long getWorkItemId();

    /**
     * Incoming or outgoing connection identifier (sequence flow) for given node.
     * Incoming or outgoing depends on the type of the node instance log entry where
     * 
     *  entry type will contain incoming sequence flow
     *  exit type will contain outgoing sequence flow
     * 
     * @return Incoming or outgoing connection identifier
     *
     * @see NodeInstanceLog#getType()
     */
    String getConnection();

    /**
     * @return external (optional) identifier associated with this process instance
     */
    String getExternalId();

    /**
     * @return Node type that indicates what sort of activity it was e.g. Human Task, Script Task, etc
     */
    String getNodeType();

    /**
     * @return Type of the node instance log entry - Entry or Exit
     * @see NodeInstanceLog#TYPE_ENTER
     * @see NodeInstanceLog#TYPE_EXIT
     */
    Integer getType();

}