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/*
* Copyright 2007-2019 Ping Identity Corporation
* All Rights Reserved.
*/
/*
* Copyright (C) 2008-2019 Ping Identity Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (GPLv2 only)
* or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
package com.unboundid.ldap.sdk.controls;
import com.unboundid.asn1.ASN1Element;
import com.unboundid.asn1.ASN1Enumerated;
import com.unboundid.asn1.ASN1Exception;
import com.unboundid.asn1.ASN1OctetString;
import com.unboundid.asn1.ASN1Sequence;
import com.unboundid.ldap.sdk.Control;
import com.unboundid.ldap.sdk.DecodeableControl;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.ldap.sdk.SearchResult;
import com.unboundid.util.Debug;
import com.unboundid.util.NotMutable;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;
import static com.unboundid.ldap.sdk.controls.ControlMessages.*;
/**
* This class provides an implementation of the server-side sort response
* control, as defined in
* RFC 2891. It may be used
* to provide information about the result of server-side sort processing. If
* the corresponding search request included the
* {@link ServerSideSortRequestControl}, then the search result done message
* may include this response control to provide information about the state of
* the sorting.
*/
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class ServerSideSortResponseControl
extends Control
implements DecodeableControl
{
/**
* The OID (1.2.840.113556.1.4.474) for the server-side sort response control.
*/
public static final String SERVER_SIDE_SORT_RESPONSE_OID =
"1.2.840.113556.1.4.474";
/**
* The BER type to use for the element that holds the attribute type.
*/
private static final byte TYPE_ATTRIBUTE_TYPE = (byte) 0x80;
/**
* The serial version UID for this serializable class.
*/
private static final long serialVersionUID = -8707533262822875822L;
// The result code for this server-side sort response control.
private final ResultCode resultCode;
// The name of the attribute associated with this result, if available.
private final String attributeName;
/**
* Creates a new empty control instance that is intended to be used only for
* decoding controls via the {@code DecodeableControl} interface.
*/
ServerSideSortResponseControl()
{
resultCode = null;
attributeName = null;
}
/**
* Creates a new server-side sort response control with the provided
* information.
*
* @param resultCode The result code for this server-side sort response.
* @param attributeName The name of the attribute associated with this
* result. It may be {@code null} if there is no
* associated attribute name.
*/
public ServerSideSortResponseControl(final ResultCode resultCode,
final String attributeName)
{
this(resultCode, attributeName, false);
}
/**
* Creates a new server-side sort response control with the provided
* information.
*
* @param resultCode The result code for this server-side sort response.
* @param attributeName The name of the attribute associated with this
* result. It may be {@code null} if there is no
* associated attribute name.
* @param isCritical Indicates whether this control should be marked
* critical. Response controls should generally not be
* critical.
*/
public ServerSideSortResponseControl(final ResultCode resultCode,
final String attributeName,
final boolean isCritical)
{
super(SERVER_SIDE_SORT_RESPONSE_OID, isCritical,
encodeValue(resultCode, attributeName));
this.resultCode = resultCode;
this.attributeName = attributeName;
}
/**
* Creates a new server-side sort response control from the information
* contained in the provided control.
*
* @param oid The OID for the control.
* @param isCritical Indicates whether the control should be marked
* critical.
* @param value The encoded value for the control. This may be
* {@code null} if no value was provided.
*
* @throws LDAPException If a problem occurs while attempting to decode the
* provided control as a server-side sort response
* control.
*/
public ServerSideSortResponseControl(final String oid,
final boolean isCritical,
final ASN1OctetString value)
throws LDAPException
{
super(oid, isCritical, value);
if (value == null)
{
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_SORT_RESPONSE_NO_VALUE.get());
}
final ASN1Sequence valueSequence;
try
{
final ASN1Element valueElement =
ASN1Element.decode(value.getValue());
valueSequence = ASN1Sequence.decodeAsSequence(valueElement);
}
catch (final ASN1Exception ae)
{
Debug.debugException(ae);
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_SORT_RESPONSE_VALUE_NOT_SEQUENCE.get(ae), ae);
}
final ASN1Element[] valueElements = valueSequence.elements();
if ((valueElements.length < 1) || (valueElements.length > 2))
{
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_SORT_RESPONSE_INVALID_ELEMENT_COUNT.get(
valueElements.length));
}
try
{
final int rc =
ASN1Enumerated.decodeAsEnumerated(valueElements[0]).intValue();
resultCode = ResultCode.valueOf(rc);
}
catch (final ASN1Exception ae)
{
Debug.debugException(ae);
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_SORT_RESPONSE_FIRST_NOT_ENUM.get(ae), ae);
}
if (valueElements.length == 2)
{
attributeName =
ASN1OctetString.decodeAsOctetString(valueElements[1]).stringValue();
}
else
{
attributeName = null;
}
}
/**
* {@inheritDoc}
*/
@Override()
public ServerSideSortResponseControl
decodeControl(final String oid, final boolean isCritical,
final ASN1OctetString value)
throws LDAPException
{
return new ServerSideSortResponseControl(oid, isCritical, value);
}
/**
* Extracts a server-side sort response control from the provided result.
*
* @param result The result from which to retrieve the server-side sort
* response control.
*
* @return The server-side sort response control contained in the provided
* result, or {@code null} if the result did not contain a
* server-side sort response control.
*
* @throws LDAPException If a problem is encountered while attempting to
* decode the server-side sort response control
* contained in the provided result.
*/
public static ServerSideSortResponseControl get(final SearchResult result)
throws LDAPException
{
final Control c = result.getResponseControl(SERVER_SIDE_SORT_RESPONSE_OID);
if (c == null)
{
return null;
}
if (c instanceof ServerSideSortResponseControl)
{
return (ServerSideSortResponseControl) c;
}
else
{
return new ServerSideSortResponseControl(c.getOID(), c.isCritical(),
c.getValue());
}
}
/**
* Encodes the provided information into an octet string that can be used as
* the value for this control.
*
* @param resultCode The result code for this server-side sort response
* control.
* @param attributeName The attribute name to include in the control, or
* {@code null} if it should not be provided.
*
* @return An ASN.1 octet string that can be used as the value for this
* control.
*/
private static ASN1OctetString encodeValue(final ResultCode resultCode,
final String attributeName)
{
final ASN1Element[] valueElements;
if (attributeName == null)
{
valueElements = new ASN1Element[]
{
new ASN1Enumerated(resultCode.intValue())
};
}
else
{
valueElements = new ASN1Element[]
{
new ASN1Enumerated(resultCode.intValue()),
new ASN1OctetString(TYPE_ATTRIBUTE_TYPE, attributeName)
};
}
return new ASN1OctetString(new ASN1Sequence(valueElements).encode());
}
/**
* Retrieves the result code for this server-side sort response control.
*
* @return The result code for this server-side sort response control.
*/
public ResultCode getResultCode()
{
return resultCode;
}
/**
* Retrieves the attribute name for this server-side sort response control, if
* available.
*
* @return The attribute name for this server-side sort response control, or
* {@code null} if none was provided.
*/
public String getAttributeName()
{
return attributeName;
}
/**
* {@inheritDoc}
*/
@Override()
public String getControlName()
{
return INFO_CONTROL_NAME_SORT_RESPONSE.get();
}
/**
* {@inheritDoc}
*/
@Override()
public void toString(final StringBuilder buffer)
{
buffer.append("ServerSideSortResponseControl(resultCode=");
buffer.append(resultCode);
if (attributeName != null)
{
buffer.append(", attributeName='");
buffer.append(attributeName);
buffer.append('\'');
}
buffer.append(')');
}
}
