001/*
002 * Copyright 2009-2014 UnboundID Corp.
003 * All Rights Reserved.
004 */
005/*
006 * Copyright (C) 2009-2014 UnboundID Corp.
007 *
008 * This program is free software; you can redistribute it and/or modify
009 * it under the terms of the GNU General Public License (GPLv2 only)
010 * or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
011 * as published by the Free Software Foundation.
012 *
013 * This program is distributed in the hope that it will be useful,
014 * but WITHOUT ANY WARRANTY; without even the implied warranty of
015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
016 * GNU General Public License for more details.
017 *
018 * You should have received a copy of the GNU General Public License
019 * along with this program; if not, see <http://www.gnu.org/licenses>.
020 */
021package com.unboundid.ldap.protocol;
022
023
024
025import com.unboundid.asn1.ASN1Buffer;
026import com.unboundid.asn1.ASN1BufferSequence;
027import com.unboundid.asn1.ASN1Element;
028import com.unboundid.asn1.ASN1OctetString;
029import com.unboundid.asn1.ASN1Sequence;
030import com.unboundid.asn1.ASN1StreamReader;
031import com.unboundid.ldap.sdk.CompareRequest;
032import com.unboundid.ldap.sdk.Control;
033import com.unboundid.ldap.sdk.LDAPException;
034import com.unboundid.ldap.sdk.ResultCode;
035import com.unboundid.util.NotMutable;
036import com.unboundid.util.InternalUseOnly;
037import com.unboundid.util.ThreadSafety;
038import com.unboundid.util.ThreadSafetyLevel;
039
040import static com.unboundid.ldap.protocol.ProtocolMessages.*;
041import static com.unboundid.util.Debug.*;
042import static com.unboundid.util.StaticUtils.*;
043import static com.unboundid.util.Validator.*;
044
045
046
047/**
048 * This class provides an implementation of an LDAP compare request protocol op.
049 */
050@InternalUseOnly()
051@NotMutable()
052@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
053public final class CompareRequestProtocolOp
054       implements ProtocolOp
055{
056  /**
057   * The serial version UID for this serializable class.
058   */
059  private static final long serialVersionUID = -562642367801440060L;
060
061
062
063  // The assertion value for this compare request.
064  private final ASN1OctetString assertionValue;
065
066  // The attribute name for this compare request.
067  private final String attributeName;
068
069  // The entry DN for this compare request.
070  private final String dn;
071
072
073
074  /**
075   * Creates a new compare request protocol op with the provided information.
076   *
077   * @param  dn              The DN for this compare request.
078   * @param  attributeName   The attribute name for this compare request.
079   * @param  assertionValue  The assertion value for this compare request.
080   */
081  public CompareRequestProtocolOp(final String dn, final String attributeName,
082                                  final ASN1OctetString assertionValue)
083  {
084    this.dn             = dn;
085    this.attributeName  = attributeName;
086    this.assertionValue = assertionValue;
087  }
088
089
090
091  /**
092   * Creates a new compare request protocol op from the provided compare request
093   * object.
094   *
095   * @param  request  The compare request object to use to create this protocol
096   *                  op.
097   */
098  public CompareRequestProtocolOp(final CompareRequest request)
099  {
100    dn             = request.getDN();
101    attributeName  = request.getAttributeName();
102    assertionValue = request.getRawAssertionValue();
103  }
104
105
106
107  /**
108   * Creates a new compare request protocol op read from the provided ASN.1
109   * stream reader.
110   *
111   * @param  reader  The ASN.1 stream reader from which to read the compare
112   *                 request protocol op.
113   *
114   * @throws  LDAPException  If a problem occurs while reading or parsing the
115   *                         compare request.
116   */
117  CompareRequestProtocolOp(final ASN1StreamReader reader)
118       throws LDAPException
119  {
120    try
121    {
122      reader.beginSequence();
123      dn = reader.readString();
124
125      reader.beginSequence();
126      attributeName = reader.readString();
127      assertionValue = new ASN1OctetString(reader.readBytes());
128      ensureNotNull(dn, attributeName, assertionValue);
129    }
130    catch (Exception e)
131    {
132      debugException(e);
133
134      throw new LDAPException(ResultCode.DECODING_ERROR,
135           ERR_COMPARE_REQUEST_CANNOT_DECODE.get(getExceptionMessage(e)), e);
136    }
137  }
138
139
140
141  /**
142   * Retrieves the DN for this compare request.
143   *
144   * @return  The DN for this compare request.
145   */
146  public String getDN()
147  {
148    return dn;
149  }
150
151
152
153  /**
154   * Retrieves the attribute name for this compare request.
155   *
156   * @return  The attribute name for this compare request.
157   */
158  public String getAttributeName()
159  {
160    return attributeName;
161  }
162
163
164
165  /**
166   * Retrieves the assertion value for this compare request.
167   *
168   * @return  The assertion value for this compare request.
169   */
170  public ASN1OctetString getAssertionValue()
171  {
172    return assertionValue;
173  }
174
175
176
177  /**
178   * {@inheritDoc}
179   */
180  public byte getProtocolOpType()
181  {
182    return LDAPMessage.PROTOCOL_OP_TYPE_COMPARE_REQUEST;
183  }
184
185
186
187  /**
188   * {@inheritDoc}
189   */
190  public ASN1Element encodeProtocolOp()
191  {
192    return new ASN1Sequence(LDAPMessage.PROTOCOL_OP_TYPE_COMPARE_REQUEST,
193         new ASN1OctetString(dn),
194         new ASN1Sequence(
195              new ASN1OctetString(attributeName),
196              assertionValue));
197  }
198
199
200
201  /**
202   * Decodes the provided ASN.1 element as a compare request protocol op.
203   *
204   * @param  element  The ASN.1 element to be decoded.
205   *
206   * @return  The decoded compare request protocol op.
207   *
208   * @throws  LDAPException  If the provided ASN.1 element cannot be decoded as
209   *                         a compare request protocol op.
210   */
211  public static CompareRequestProtocolOp decodeProtocolOp(
212                                              final ASN1Element element)
213         throws LDAPException
214  {
215    try
216    {
217      final ASN1Element[] elements =
218           ASN1Sequence.decodeAsSequence(element).elements();
219      final String dn =
220           ASN1OctetString.decodeAsOctetString(elements[0]).stringValue();
221
222      final ASN1Element[] avaElements =
223           ASN1Sequence.decodeAsSequence(elements[1]).elements();
224      final String attributeName =
225           ASN1OctetString.decodeAsOctetString(avaElements[0]).stringValue();
226      final ASN1OctetString assertionValue =
227           ASN1OctetString.decodeAsOctetString(avaElements[1]);
228
229      return new CompareRequestProtocolOp(dn, attributeName, assertionValue);
230    }
231    catch (final Exception e)
232    {
233      debugException(e);
234      throw new LDAPException(ResultCode.DECODING_ERROR,
235           ERR_COMPARE_REQUEST_CANNOT_DECODE.get(getExceptionMessage(e)),
236           e);
237    }
238  }
239
240
241
242  /**
243   * {@inheritDoc}
244   */
245  public void writeTo(final ASN1Buffer buffer)
246  {
247    final ASN1BufferSequence opSequence =
248         buffer.beginSequence(LDAPMessage.PROTOCOL_OP_TYPE_COMPARE_REQUEST);
249    buffer.addOctetString(dn);
250
251    final ASN1BufferSequence avaSequence = buffer.beginSequence();
252    buffer.addOctetString(attributeName);
253    buffer.addElement(assertionValue);
254    avaSequence.end();
255    opSequence.end();
256  }
257
258
259
260  /**
261   * Creates a compare request from this protocol op.
262   *
263   * @param  controls  The set of controls to include in the compare request.
264   *                   It may be empty or {@code null} if no controls should be
265   *                   included.
266   *
267   * @return  The compare request that was created.
268   */
269  public CompareRequest toCompareRequest(final Control... controls)
270  {
271    return new CompareRequest(dn, attributeName, assertionValue.getValue(),
272         controls);
273  }
274
275
276
277  /**
278   * Retrieves a string representation of this protocol op.
279   *
280   * @return  A string representation of this protocol op.
281   */
282  @Override()
283  public String toString()
284  {
285    final StringBuilder buffer = new StringBuilder();
286    toString(buffer);
287    return buffer.toString();
288  }
289
290
291
292  /**
293   * {@inheritDoc}
294   */
295  public void toString(final StringBuilder buffer)
296  {
297    buffer.append("CompareRequestProtocolOp(dn='");
298    buffer.append(dn);
299    buffer.append("', attributeName='");
300    buffer.append(attributeName);
301    buffer.append("', assertionValue='");
302    buffer.append(assertionValue.stringValue());
303    buffer.append("')");
304  }
305}