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The UnboundID LDAP SDK for Java is a fast, comprehensive, and easy-to-use Java API for communicating with LDAP directory servers and performing related tasks like reading and writing LDIF, encoding and decoding data using base64 and ASN.1 BER, and performing secure communication. This package contains the Commercial Edition of the LDAP SDK, which includes all of the general-purpose functionality contained in the Standard Edition, plus additional functionality specific to UnboundID server products.

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/*
 * Copyright 2008-2016 UnboundID Corp.
 * All Rights Reserved.
 */
/*
 * Copyright (C) 2008-2016 UnboundID Corp.
 *
 * 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.matchingrules;



import com.unboundid.asn1.ASN1OctetString;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;

import static com.unboundid.ldap.matchingrules.MatchingRuleMessages.*;
import static com.unboundid.util.StaticUtils.*;



/**
 * This class provides an implementation of a matching rule that allows strings
 * consisting of numeric digits and spaces.  Spaces will be considered
 * insignificant for matching purposes.
 */
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class NumericStringMatchingRule
       extends SimpleMatchingRule
{
  /**
   * The singleton instance that will be returned from the {@code getInstance}
   * method.
   */
  private static final NumericStringMatchingRule INSTANCE =
       new NumericStringMatchingRule();



  /**
   * The name for the numericStringMatch equality matching rule.
   */
  public static final String EQUALITY_RULE_NAME = "numericStringMatch";



  /**
   * The name for the numericStringMatch equality matching rule, formatted in
   * all lowercase characters.
   */
  static final String LOWER_EQUALITY_RULE_NAME =
       toLowerCase(EQUALITY_RULE_NAME);



  /**
   * The OID for the numericStringMatch equality matching rule.
   */
  public static final String EQUALITY_RULE_OID = "2.5.13.8";



  /**
   * The name for the numericStringOrderingMatch ordering matching rule.
   */
  public static final String ORDERING_RULE_NAME = "numericStringOrderingMatch";



  /**
   * The name for the numericStringOrderingMatch ordering matching rule,
   * formatted in all lowercase characters.
   */
  static final String LOWER_ORDERING_RULE_NAME =
       toLowerCase(ORDERING_RULE_NAME);



  /**
   * The OID for the numericStringOrderingMatch ordering matching rule.
   */
  public static final String ORDERING_RULE_OID = "2.5.13.9";



  /**
   * The name for the numericStringSubstringsMatch substring matching rule.
   */
  public static final String SUBSTRING_RULE_NAME =
       "numericStringSubstringsMatch";



  /**
   * The name for the numericStringSubstringsMatch substring matching rule,
   * formatted in all lowercase characters.
   */
  static final String LOWER_SUBSTRING_RULE_NAME =
       toLowerCase(SUBSTRING_RULE_NAME);



  /**
   * The OID for the numericStringSubstringsMatch substring matching rule.
   */
  public static final String SUBSTRING_RULE_OID = "2.5.13.10";



  /**
   * The serial version UID for this serializable class.
   */
  private static final long serialVersionUID = -898484312052746321L;



  /**
   * Creates a new instance of this numeric string matching rule.
   */
  public NumericStringMatchingRule()
  {
    // No implementation is required.
  }



  /**
   * Retrieves a singleton instance of this matching rule.
   *
   * @return  A singleton instance of this matching rule.
   */
  public static NumericStringMatchingRule getInstance()
  {
    return INSTANCE;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public String getEqualityMatchingRuleName()
  {
    return EQUALITY_RULE_NAME;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public String getEqualityMatchingRuleOID()
  {
    return EQUALITY_RULE_OID;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public String getOrderingMatchingRuleName()
  {
    return ORDERING_RULE_NAME;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public String getOrderingMatchingRuleOID()
  {
    return ORDERING_RULE_OID;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public String getSubstringMatchingRuleName()
  {
    return SUBSTRING_RULE_NAME;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public String getSubstringMatchingRuleOID()
  {
    return SUBSTRING_RULE_OID;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public ASN1OctetString normalize(final ASN1OctetString value)
         throws LDAPException
  {
    // The value may already be normalized, so optimize behavior for that
    // possibility.
    int numSpaces = 0;
    final byte[] valueBytes = value.getValue();
    for (int i=0; i < valueBytes.length; i++)
    {
      if (valueBytes[i] == ' ')
      {
        numSpaces++;
      }
      else if ((valueBytes[i] < '0') || (valueBytes[i] > '9'))
      {
        throw new LDAPException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
                                ERR_NUMERIC_STRING_INVALID_CHARACTER.get(i));
      }
    }

    if (numSpaces == 0)
    {
      return value;
    }

    int pos = 0;
    final byte[] returnBytes = new byte[valueBytes.length-numSpaces];
    for (final byte b : valueBytes)
    {
      if (b != ' ')
      {
        returnBytes[pos++] = b;
      }
    }

    return new ASN1OctetString(returnBytes);
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public ASN1OctetString normalizeSubstring(final ASN1OctetString value,
                                            final byte substringType)
         throws LDAPException
  {
    return normalize(value);
  }
}