/*
* Copyright 2008 - 2009 Lars Heuer (heuer[at]semagia.com). 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.
* 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 com.semagia.atomico.server.impl.restlet.resources;
import org.restlet.data.MediaType;
import org.restlet.data.Tag;
import org.restlet.representation.Variant;
/**
* Atomico specific implementation of a {@link Variant}.
* <p>
* This class is meant to be used in conjunction with
* {@link AbstractAtomicoResource}. Instances of this class provide the
* necessary information to evaluate the HTTP conditional headers without
* creating a more expensive {@link org.restlet.resource.Representation}.
* </p>
*
* @see {@link AbstractAtomicoResource}
*
* @author Lars Heuer (heuer[at]semagia.com) <a href="http://www.semagia.com/">Semagia</a>
* @version $Rev: 66 $ - $Date: 2010-09-06 10:29:07 -0500 (Mon, 06 Sep 2010) $
*/
final class AtomicoVariant extends Variant {
/**
* The modification time of this variant.
*/
private final long _modified;
/**
* The HTTP conditional headers.
*/
private final Tag _etag;
/**
* Creates a variant with the specified media type and modification time.
* <p>
* The eTag will be <tt>null</tt>.
* </p>
*
* @param mediaType The media type, must not be <tt>null</tt>.
* @param modified The modification time.
*/
public AtomicoVariant(String mediaType, long modified) {
this(mediaType, modified, null);
}
/**
* Creates a variant with the specified media type and modification time.
*
* @param mediaType The media type, must not be <tt>null</tt>.
* @param modified The modification time.
* @param eTag A tag formatted as defined by the HTTP standard or
* <tt>null</tt>.
*/
public AtomicoVariant(String mediaType, long modified, String eTag) {
super(MediaType.valueOf(mediaType));
_modified = modified;
_etag = eTag == null ? null : new Tag(eTag, true);
}
/**
* Returns the ETag of this variant.
*
* @return The ETag or <tt>null</tt> if the ETag is not specified.
*/
public Tag getETag() {
return _etag;
}
/**
* Returns the modification time of this variant.
*
* @return The modification time.
*/
public long getModificationTime() {
return _modified;
}
}