org.camunda.bpm.engine.impl.cmmn.cmd.GetDeploymentCaseDiagramCmd Maven / Gradle / Ivy
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* Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
* under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. Camunda licenses this file to you under the Apache License,
* Version 2.0; 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.camunda.bpm.engine.impl.cmmn.cmd;
import java.io.InputStream;
import java.io.Serializable;
import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.impl.cfg.CommandChecker;
import org.camunda.bpm.engine.impl.cmd.GetDeploymentResourceCmd;
import org.camunda.bpm.engine.impl.cmmn.entity.repository.CaseDefinitionEntity;
import org.camunda.bpm.engine.impl.context.Context;
import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;
/**
* Gives access to a deployed case diagram, e.g., a PNG image, through a stream
* of bytes.
*
* @author Simon Zambrovski
*/
public class GetDeploymentCaseDiagramCmd implements Command, Serializable {
private static final long serialVersionUID = 1L;
protected String caseDefinitionId;
public GetDeploymentCaseDiagramCmd(String caseDefinitionId) {
if (caseDefinitionId == null || caseDefinitionId.length() < 1) {
throw new ProcessEngineException("The case definition id is mandatory, but '" + caseDefinitionId + "' has been provided.");
}
this.caseDefinitionId = caseDefinitionId;
}
@Override
public InputStream execute(final CommandContext commandContext) {
CaseDefinitionEntity caseDefinition = Context
.getProcessEngineConfiguration()
.getDeploymentCache()
.findDeployedCaseDefinitionById(caseDefinitionId);
for(CommandChecker checker : commandContext.getProcessEngineConfiguration().getCommandCheckers()) {
checker.checkReadCaseDefinition(caseDefinition);
}
final String deploymentId = caseDefinition.getDeploymentId();
final String resourceName = caseDefinition.getDiagramResourceName();
InputStream caseDiagramStream = null;
if (resourceName != null) {
caseDiagramStream = commandContext.runWithoutAuthorization(new GetDeploymentResourceCmd(deploymentId, resourceName));
}
return caseDiagramStream;
}
}