com.glaf.jbpm.action.SequenceTaskInstanceAction.java Source code

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Here is the source code for com.glaf.jbpm.action.SequenceTaskInstanceAction.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.glaf.jbpm.action;

import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.jbpm.context.exe.ContextInstance;
import org.jbpm.graph.def.ActionHandler;
import org.jbpm.graph.def.Node;
import org.jbpm.graph.exe.ExecutionContext;
import org.jbpm.graph.exe.Token;
import org.jbpm.graph.node.TaskNode;
import org.jbpm.taskmgmt.def.Task;
import org.jbpm.taskmgmt.exe.TaskInstance;
import org.jbpm.taskmgmt.exe.TaskMgmtInstance;

import com.glaf.core.util.StringTools;
import com.glaf.jbpm.el.DefaultExpressionEvaluator;
import com.glaf.jbpm.util.Constant;

/**
 * ??<br/>
 * ?Atask02???X,Y,Z ??Y,Z,X<br/>
 * Acreate-tasks="false", ?node-enter<br/>
 * task02taskInstance,?taskInstance ?Y,Z,X<br/>
 * ??YtaskInstance ?Y?task02 <br/>
 * Y? task02task-end ?ZtaskInstance?<br/>
 * 
 */
public class SequenceTaskInstanceAction implements ActionHandler {

    private static final long serialVersionUID = 1L;

    /**
     * ?
     */
    protected String expression;

    /**
     * ????????contextInstance.getVariable()?
     * contextInstance.getVariable("DeptAuditor");
     */
    protected String dynamicActors;

    /**
     * ??
     */
    protected String taskName;

    /**
     * ??
     */
    protected String transitionName;

    /**
     * ???
     */
    protected boolean leaveNodeIfActorNotAgree;

    /**
     * ????
     */
    protected boolean leaveNodeIfActorNotAvailable;

    public void execute(ExecutionContext ctx) throws Exception {
        boolean isAgree = true;

        Map<String, Object> params = new java.util.HashMap<String, Object>();

        ContextInstance contextInstance = ctx.getContextInstance();
        Map<String, Object> variables = contextInstance.getVariables();
        if (variables != null && variables.size() > 0) {
            Iterator<String> iterator = variables.keySet().iterator();
            while (iterator.hasNext()) {
                String variableName = iterator.next();
                if (params.get(variableName) == null) {
                    Object value = contextInstance.getVariable(variableName);
                    params.put(variableName, value);
                }
            }
        }

        if (StringUtils.isNotEmpty(expression)) {
            if (expression.startsWith("#{") && expression.endsWith("}")) {
                Object value = DefaultExpressionEvaluator.evaluate(expression, params);
                if (value != null) {
                    if (value instanceof Boolean) {
                        Boolean b = (Boolean) value;
                        isAgree = b.booleanValue();
                    }
                }
            }
        }

        /**
         * ???
         */
        if ((!isAgree) && leaveNodeIfActorNotAgree) {
            if (StringUtils.isNotEmpty(transitionName)) {
                ctx.leaveNode(transitionName);
            } else {
                ctx.leaveNode();
            }
            return;
        }

        boolean hasActors = false;

        List<String> actorIds = null;

        Task task = null;
        if (StringUtils.isNotEmpty(taskName)) {
            Node node = ctx.getNode();
            if (node instanceof TaskNode) {
                TaskNode taskNode = (TaskNode) node;
                task = taskNode.getTask(taskName);
            }
        }

        if (task == null) {
            task = ctx.getTask();
        }

        if (StringUtils.isNotEmpty(dynamicActors)) {
            String rowIds = (String) contextInstance.getVariable(dynamicActors);
            if (StringUtils.isNotEmpty(rowIds)) {
                actorIds = StringTools.split(rowIds);
            }
        }

        if (actorIds != null) {
            if (actorIds.size() > 0) {
                String actorId = actorIds.get(0);
                Token token = ctx.getToken();
                TaskMgmtInstance tmi = ctx.getTaskMgmtInstance();
                TaskInstance taskInstance = tmi.createTaskInstance(task, token);
                taskInstance.setActorId(actorId);
                taskInstance.setCreate(new Date());
                taskInstance.setSignalling(task.isSignalling());
                actorIds.remove(0);
                hasActors = true;
            }

            if (actorIds.size() > 0) {
                StringBuilder buffer = new StringBuilder();
                String delim = "";
                for (String element : actorIds) {
                    buffer.append(delim);
                    buffer.append(element);
                    delim = ",";
                }
                contextInstance.setVariable(dynamicActors, buffer.toString());
            }
        }

        if (!hasActors) {
            if (leaveNodeIfActorNotAvailable) {
                contextInstance.setVariable(Constant.IS_AGREE, "true");
                if (StringUtils.isNotEmpty(transitionName)) {
                    ctx.leaveNode(transitionName);
                } else {
                    ctx.leaveNode();
                }
            }
        }
    }

    public String getDynamicActors() {
        return dynamicActors;
    }

    public String getTaskName() {
        return taskName;
    }

    public String getTransitionName() {
        return transitionName;
    }

    public boolean isLeaveNodeIfActorNotAgree() {
        return leaveNodeIfActorNotAgree;
    }

    public boolean isLeaveNodeIfActorNotAvailable() {
        return leaveNodeIfActorNotAvailable;
    }

    public void setDynamicActors(String dynamicActors) {
        this.dynamicActors = dynamicActors;
    }

    public void setExpression(String expression) {
        this.expression = expression;
    }

    public void setLeaveNodeIfActorNotAgree(boolean leaveNodeIfActorNotAgree) {
        this.leaveNodeIfActorNotAgree = leaveNodeIfActorNotAgree;
    }

    public void setLeaveNodeIfActorNotAvailable(boolean leaveNodeIfActorNotAvailable) {
        this.leaveNodeIfActorNotAvailable = leaveNodeIfActorNotAvailable;
    }

    public void setTaskName(String taskName) {
        this.taskName = taskName;
    }

    public void setTransitionName(String transitionName) {
        this.transitionName = transitionName;
    }

}