public DescribeVolumesResult unmarshall(StaxUnmarshallerContext context) throws Exception {
DescribeVolumesResult describeVolumesResult = new DescribeVolumesResult();
int originalDepth = context.getCurrentDepth();
int targetDepth = originalDepth + 1;
if (context.isStartOfDocument()) targetDepth += 1;
while (true) {
XMLEvent xmlEvent = context.nextEvent();
if (xmlEvent.isEndDocument()) return describeVolumesResult;
if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {
if (context.testExpression("volumeSet/item", targetDepth)) {
describeVolumesResult
.getVolumes()
.add(VolumeStaxUnmarshaller.getInstance().unmarshall(context));
continue;
}
} else if (xmlEvent.isEndElement()) {
if (context.getCurrentDepth() < originalDepth) {
return describeVolumesResult;
}
}
}
}
/**
* Describe a set of specific EBS volumes.
*
* @param volumeIds the volume ids
* @return the volumes
*/
public List<Volume> describeVolumes(String... volumeIds) {
if (volumeIds == null || volumeIds.length == 0) {
LOGGER.info("Getting all EBS volumes.");
} else {
LOGGER.info(String.format("Getting EBS volumes for %d ids.", volumeIds.length));
}
AmazonEC2 ec2Client = ec2Client();
DescribeVolumesRequest request = new DescribeVolumesRequest();
if (volumeIds != null) {
request.setVolumeIds(Arrays.asList(volumeIds));
}
DescribeVolumesResult result = ec2Client.describeVolumes(request);
List<Volume> volumes = result.getVolumes();
LOGGER.info(String.format("Got %d EBS volumes.", volumes.size()));
return volumes;
}