/*
* Copyright 2010-2014 Amazon.com, Inc. or its affiliates. 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://aws.amazon.com/apache2.0
*
* 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.amazonaws.services.s3.model.transform;
import com.amazonaws.AmazonClientException;
import com.amazonaws.services.s3.internal.Constants;
import com.amazonaws.services.s3.internal.XmlWriter;
import com.amazonaws.services.s3.model.AccessControlList;
import com.amazonaws.services.s3.model.CanonicalGrantee;
import com.amazonaws.services.s3.model.EmailAddressGrantee;
import com.amazonaws.services.s3.model.Grant;
import com.amazonaws.services.s3.model.Grantee;
import com.amazonaws.services.s3.model.GroupGrantee;
import com.amazonaws.services.s3.model.Owner;
/**
* Factory for creating XML fragments from AccessControlList objects that can be
* sent to Amazon S3 as part of requests.
*/
public class AclXmlFactory {
/**
* Converts the specified AccessControlList object to an XML fragment that
* can be sent to Amazon S3.
*
* @param acl
* The AccessControlList to convert to XML.
*
* @return an XML representation of the Access Control List object, suitable
* to send in a request to Amazon S3.
*/
public byte[] convertToXmlByteArray(AccessControlList acl) throws AmazonClientException {
Owner owner = acl.getOwner();
if (owner == null) {
throw new AmazonClientException("Invalid AccessControlList: missing an S3Owner");
}
XmlWriter xml = new XmlWriter();
xml.start("AccessControlPolicy", "xmlns", Constants.XML_NAMESPACE);
xml.start("Owner");
if (owner.getId() != null) {
xml.start("ID").value(owner.getId()).end();
}
if (owner.getDisplayName() != null) {
xml.start("DisplayName").value(owner.getDisplayName()).end();
}
xml.end();
xml.start("AccessControlList");
for (Grant grant : acl.getGrants()) {
xml.start("Grant");
convertToXml(grant.getGrantee(), xml);
xml.start("Permission").value(grant.getPermission().toString()).end();
xml.end();
}
xml.end();
xml.end();
return xml.getBytes();
}
/**
* Returns an XML fragment representing the specified Grantee.
*
* @param grantee
* The grantee to convert to an XML representation that can be
* sent to Amazon S3 as part of a request.
* @param xml
* The XmlWriter to which to concatenate this node to.
*
* @return The given XmlWriter containing the specified grantee.
*
* @throws AmazonClientException
* If the specified grantee type isn't recognized.
*/
protected XmlWriter convertToXml(Grantee grantee, XmlWriter xml) throws AmazonClientException {
if (grantee instanceof CanonicalGrantee) {
return convertToXml((CanonicalGrantee)grantee, xml);
} else if (grantee instanceof EmailAddressGrantee) {
return convertToXml((EmailAddressGrantee)grantee, xml);
} else if (grantee instanceof GroupGrantee) {
return convertToXml((GroupGrantee)grantee, xml);
} else {
throw new AmazonClientException("Unknown Grantee type: " + grantee.getClass().getName());
}
}
/**
* Returns an XML fragment representing the specified canonical grantee.
*
* @param grantee
* The canonical grantee to convert to an XML representation that
* can be sent to Amazon S3 as part of request.
* @param xml
* The XmlWriter to which to concatenate this node to.
*
* @return The given XmlWriter containing the specified canonical grantee.
*/
protected XmlWriter convertToXml(CanonicalGrantee grantee, XmlWriter xml) {
xml.start("Grantee", new String[] {"xmlns:xsi" , "xsi:type"},
new String[] {"http://www.w3.org/2001/XMLSchema-instance", "CanonicalUser"});
xml.start("ID").value(grantee.getIdentifier()).end();
xml.end();
return xml;
}
/**
* Returns an XML fragment representing the specified email address grantee.
*
* @param grantee
* The email address grantee to convert to an XML representation
* that can be sent to Amazon S3 as part of request.
* @param xml
* The XmlWriter to which to concatenate this node to.
*
* @return The given XmlWriter containing the specified email address grantee
*/
protected XmlWriter convertToXml(EmailAddressGrantee grantee, XmlWriter xml) {
xml.start("Grantee", new String[] {"xmlns:xsi" , "xsi:type"},
new String[] {"http://www.w3.org/2001/XMLSchema-instance", "AmazonCustomerByEmail"});
xml.start("EmailAddress").value(grantee.getIdentifier()).end();
xml.end();
return xml;
}
/**
* Returns an XML fragment representing the specified group grantee.
*
* @param grantee
* The group grantee to convert to an XML representation that can
* be sent to Amazon S3 as part of request.
* @param xml
* The XmlWriter to which to concatenate this node to.
*
* @return The given XmlWriter containing the specified group grantee.
*/
protected XmlWriter convertToXml(GroupGrantee grantee, XmlWriter xml) {
xml.start("Grantee", new String[] {"xmlns:xsi" , "xsi:type"},
new String[] {"http://www.w3.org/2001/XMLSchema-instance", "Group"});
xml.start("URI").value(grantee.getIdentifier()).end();
xml.end();
return xml;
}
}