org.flowable.engine.impl.form.JuelFormEngine Maven / Gradle / Ivy
/* 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.form;
import java.nio.charset.StandardCharsets;
import org.flowable.common.engine.api.FlowableObjectNotFoundException;
import org.flowable.common.engine.impl.scripting.ScriptingEngines;
import org.flowable.engine.form.FormData;
import org.flowable.engine.form.StartFormData;
import org.flowable.engine.form.TaskFormData;
import org.flowable.engine.impl.persistence.entity.ExecutionEntity;
import org.flowable.engine.impl.persistence.entity.ResourceEntity;
import org.flowable.engine.impl.util.CommandContextUtil;
import org.flowable.task.service.impl.persistence.entity.TaskEntity;
/**
* @author Tom Baeyens
*/
public class JuelFormEngine implements FormEngine {
@Override
public String getName() {
return "juel";
}
@Override
public Object renderStartForm(StartFormData startForm) {
if (startForm.getFormKey() == null) {
return null;
}
String formTemplateString = getFormTemplateString(startForm, startForm.getFormKey());
ScriptingEngines scriptingEngines = CommandContextUtil.getProcessEngineConfiguration().getScriptingEngines();
return scriptingEngines.evaluate(formTemplateString, ScriptingEngines.DEFAULT_SCRIPTING_LANGUAGE, null);
}
@Override
public Object renderTaskForm(TaskFormData taskForm) {
if (taskForm.getFormKey() == null) {
return null;
}
String formTemplateString = getFormTemplateString(taskForm, taskForm.getFormKey());
ScriptingEngines scriptingEngines = CommandContextUtil.getProcessEngineConfiguration().getScriptingEngines();
TaskEntity task = (TaskEntity) taskForm.getTask();
ExecutionEntity executionEntity = null;
if (task.getExecutionId() != null) {
executionEntity = CommandContextUtil.getExecutionEntityManager().findById(task.getExecutionId());
}
return scriptingEngines.evaluate(formTemplateString, ScriptingEngines.DEFAULT_SCRIPTING_LANGUAGE, executionEntity);
}
protected String getFormTemplateString(FormData formInstance, String formKey) {
String deploymentId = formInstance.getDeploymentId();
ResourceEntity resourceStream = CommandContextUtil.getResourceEntityManager().findResourceByDeploymentIdAndResourceName(deploymentId, formKey);
if (resourceStream == null) {
throw new FlowableObjectNotFoundException("Form with formKey '" + formKey + "' does not exist", String.class);
}
return new String(resourceStream.getBytes(), StandardCharsets.UTF_8);
}
}