/* 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.impl.cmd;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.Serializable;
import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;
import org.camunda.bpm.engine.impl.persistence.entity.AttachmentEntity;
import org.camunda.bpm.engine.impl.persistence.entity.ByteArrayEntity;
/**
* @author kristin.polenz@camunda.com
*/
public class GetTaskAttachmentContentCmd implements Command<InputStream>, Serializable {
private static final long serialVersionUID = 1L;
protected String attachmentId;
protected String taskId;
public GetTaskAttachmentContentCmd(String taskId, String attachmentId) {
this.attachmentId = attachmentId;
this.taskId = taskId;
}
public InputStream execute(CommandContext commandContext) {
AttachmentEntity attachment = (AttachmentEntity) commandContext
.getAttachmentManager()
.findAttachmentByTaskIdAndAttachmentId(taskId, attachmentId);
if (attachment == null) {
return null;
}
String contentId = attachment.getContentId();
if (contentId==null) {
return null;
}
ByteArrayEntity byteArray = commandContext
.getDbEntityManager()
.selectById(ByteArrayEntity.class, contentId);
byte[] bytes = byteArray.getBytes();
return new ByteArrayInputStream(bytes);
}
}