/* 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.camunda.bpm.engine.rest.sub.history.impl;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import javax.ws.rs.core.Response.Status;
import org.camunda.bpm.engine.ProcessEngine;
import org.camunda.bpm.engine.history.HistoricVariableInstance;
import org.camunda.bpm.engine.history.HistoricVariableInstanceQuery;
import org.camunda.bpm.engine.rest.dto.history.HistoricVariableInstanceDto;
import org.camunda.bpm.engine.rest.exception.InvalidRequestException;
import org.camunda.bpm.engine.rest.sub.history.HistoricVariableInstanceResource;
import org.camunda.bpm.engine.variable.type.ValueType;
/**
* @author Daniel Meyer
*
*/
public class HistoricVariableInstanceResourceImpl implements HistoricVariableInstanceResource {
protected String variableId;
protected ProcessEngine engine;
public HistoricVariableInstanceResourceImpl(String variableId, ProcessEngine engine) {
this.variableId = variableId;
this.engine = engine;
}
public HistoricVariableInstanceDto getVariable(boolean deserializeObjectValue) {
HistoricVariableInstanceQuery query = baseQuery().disableBinaryFetching();
if (!deserializeObjectValue) {
query.disableCustomObjectDeserialization();
}
HistoricVariableInstance variableInstance = query.singleResult();
if(variableInstance != null) {
return HistoricVariableInstanceDto.fromHistoricVariableInstance(variableInstance);
} else {
throw new InvalidRequestException(Status.NOT_FOUND, "Variable instance with Id '"+variableId + "' does not exist.");
}
}
public InputStream getBinaryVariable() {
HistoricVariableInstance variableInstance = baseQuery()
.disableCustomObjectDeserialization()
.singleResult();
if(variableInstance != null) {
if (variableInstance.getTypeName().equals(ValueType.BYTES.getName())) {
byte[] valueBytes = (byte[]) variableInstance.getValue();
if (valueBytes == null) {
valueBytes = new byte[0];
}
return new ByteArrayInputStream(valueBytes);
} else {
throw new InvalidRequestException(Status.BAD_REQUEST,
String.format("Value of variable %s is not a binary value.", variableId));
}
} else {
throw new InvalidRequestException(Status.NOT_FOUND, "Historic variable instance with Id '"+variableId + "' does not exist.");
}
}
protected HistoricVariableInstanceQuery baseQuery() {
return engine.getHistoryService()
.createHistoricVariableInstanceQuery()
.variableId(variableId);
}
}