org.flowable.engine.impl.cmd.GetEnabledActivitiesForAdhocSubProcessCmd Maven / Gradle / Ivy

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/* 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.flowable.engine.impl.cmd;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import org.flowable.bpmn.model.AdhocSubProcess;
import org.flowable.bpmn.model.FlowElement;
import org.flowable.bpmn.model.FlowNode;
import org.flowable.common.engine.api.FlowableException;
import org.flowable.common.engine.api.FlowableObjectNotFoundException;
import org.flowable.common.engine.impl.interceptor.Command;
import org.flowable.common.engine.impl.interceptor.CommandContext;
import org.flowable.engine.impl.persistence.entity.ExecutionEntity;
import org.flowable.engine.impl.util.CommandContextUtil;

/**
 * @author Tijs Rademakers
 */
public class GetEnabledActivitiesForAdhocSubProcessCmd implements Command>, Serializable {

    private static final long serialVersionUID = 1L;
    protected String executionId;

    public GetEnabledActivitiesForAdhocSubProcessCmd(String executionId) {
        this.executionId = executionId;
    }

    @Override
    public List execute(CommandContext commandContext) {
        ExecutionEntity execution = CommandContextUtil.getExecutionEntityManager(commandContext).findById(executionId);
        if (execution == null) {
            throw new FlowableObjectNotFoundException("No execution found for id '" + executionId + "'", ExecutionEntity.class);
        }

        if (!(execution.getCurrentFlowElement() instanceof AdhocSubProcess)) {
            throw new FlowableException("The current flow element of the requested execution is not an ad-hoc sub process");
        }

        List enabledFlowNodes = new ArrayList<>();

        AdhocSubProcess adhocSubProcess = (AdhocSubProcess) execution.getCurrentFlowElement();

        // if sequential ordering, only one child execution can be active, so no enabled activities
        if (adhocSubProcess.hasSequentialOrdering()) {
            if (execution.getExecutions().size() > 0) {
                return enabledFlowNodes;
            }
        }

        for (FlowElement flowElement : adhocSubProcess.getFlowElements()) {
            if (flowElement instanceof FlowNode) {
                FlowNode flowNode = (FlowNode) flowElement;
                if (flowNode.getIncomingFlows().size() == 0) {
                    enabledFlowNodes.add(flowNode);
                }
            }
        }

        return enabledFlowNodes;
    }

}