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NFS Client for Java - provides read/write access to data on NFS servers. The current implementation supports only NFS version 3.
/**
* Copyright 2016 EMC Corporation. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* or in the "license" file accompanying this file. This file 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 com.emc.ecs.nfsclient.nfs;
import com.emc.ecs.nfsclient.rpc.Xdr;
/**
* Holder for weak cache consistency data, as specified by RFC 1813
* (https://tools.ietf.org/html/rfc1813).
*
* @author seibed
*/
public class NfsWccData {
/**
* Attributes before the operation.
*/
private final NfsPreOpAttributes _preOpAttributes;
/**
* Attributes after the operation.
*/
private final NfsGetAttributes _attributes;
/**
* Creates an empty structure.
*/
public NfsWccData() {
this(null);
}
/**
* Creates a structure populated from an Xdr response, as specified by RFC
* 1813 (https://tools.ietf.org/html/rfc1813).
*
* @param xdr
* the response
*/
public NfsWccData(Xdr xdr) {
_preOpAttributes = makePreOpAttributes(xdr);
_attributes = makeAttributes(xdr);
}
/**
* @return Attributes before the operation.
*/
public NfsPreOpAttributes getPreOpAttributes() {
return _preOpAttributes;
}
/**
* @return Attributes after the operation.
*/
public NfsGetAttributes getAttributes() {
return _attributes;
}
/**
* Extracts the pre-operation attributes.
* @param xdr
* @return The attributes.
*/
private static NfsPreOpAttributes makePreOpAttributes(Xdr xdr) {
NfsPreOpAttributes preOpAttributes = null;
if ((xdr != null) && xdr.getBoolean()) {
preOpAttributes = new NfsPreOpAttributes(xdr);
}
return preOpAttributes;
}
/**
* Extracts the post-operation attributes.
* @param xdr
* @return The attributes.
*/
private static NfsGetAttributes makeAttributes(Xdr xdr) {
NfsGetAttributes attributes = null;
if (xdr != null) {
attributes = NfsResponseBase.makeNfsGetAttributes(xdr);
}
return attributes;
}
}
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