/*
    *  Licensed to the Apache Software Foundation (ASF) under one
    *  or more contributor license agreements.  See the NOTICE file
    *  distributed with this work for additional information
    *  regarding copyright ownership.  The ASF licenses this file
    *  to you 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 org.apache.directory.api.ldap.model.schema;
  
  
  import org.apache.directory.api.i18n.I18n;
  
  
  /**
   * An attributeType specification. attributeType specifications describe the
   * nature of attributes within the directory. The attributeType specification's
   * properties are accessible through this interface.
   * <p>
   * According to ldapbis [MODELS]:
   * </p>
   *
   * <pre>
   *  4.1.2. Attribute Types
   *
   *    Attribute Type definitions are written according to the ABNF:
   *
   *      AttributeTypeDescription = LPAREN WSP
   *          numericoid                   ; object identifier
   *          [ SP &quot;NAME&quot; SP qdescrs ]     ; short names (descriptors)
   *          [ SP &quot;DESC&quot; SP qdstring ]    ; description
   *          [ SP &quot;OBSOLETE&quot; ]            ; not active
   *          [ SP &quot;SUP&quot; SP oid ]          ; supertype
   *          [ SP &quot;EQUALITY&quot; SP oid ]     ; equality matching rule
   *          [ SP &quot;ORDERING&quot; SP oid ]     ; ordering matching rule
   *          [ SP &quot;SUBSTR&quot; SP oid ]       ; substrings matching rule
   *          [ SP &quot;SYNTAX&quot; SP noidlen ]   ; value syntax
   *          [ SP &quot;SINGLE-VALUE&quot; ]        ; single-value
   *          [ SP &quot;COLLECTIVE&quot; ]          ; collective
   *          [ SP &quot;NO-USER-MODIFICATION&quot; ]; not user modifiable
   *          [ SP &quot;USAGE&quot; SP usage ]      ; usage
   *          extensions WSP RPAREN        ; extensions
   *
   *      usage = &quot;userApplications&quot;     / ; user
   *              &quot;directoryOperation&quot;   / ; directory operational
   *              &quot;distributedOperation&quot; / ; DSA-shared operational
   *              &quot;dSAOperation&quot;           ; DSA-specific operational
   *
   *    where:
   *      [numericoid] is object identifier assigned to this attribute type;
   *      NAME [qdescrs] are short names (descriptors) identifying this
   *          attribute type;
   *      DESC [qdstring] is a short descriptive string;
   *      OBSOLETE indicates this attribute type is not active;
   *      SUP oid specifies the direct supertype of this type;
   *      EQUALITY, ORDERING, SUBSTRING provide the oid of the equality,
   *          ordering, and substrings matching rules, respectively;
   *      SYNTAX identifies value syntax by object identifier and may suggest
   *          a minimum upper bound;
   *      COLLECTIVE indicates this attribute type is collective [X.501];
   *      NO-USER-MODIFICATION indicates this attribute type is not user
   *          modifiable;
   *      USAGE indicates the application of this attribute type; and
   *      [extensions] describe extensions.
   *
   *    Each attribute type description must contain at least one of the SUP
   *    or SYNTAX fields.
   *
   *    Usage of userApplications, the default, indicates that attributes of
   *    this type represent user information.  That is, they are user
   *    attributes.
   *
   *    COLLECTIVE requires usage userApplications.  Use of collective
   *    attribute types in LDAP is not discussed in this technical
   *    specification.
   *
   *    A usage of directoryOperation, distributedOperation, or dSAOperation
   *    indicates that attributes of this type represent operational and/or
   *    administrative information.  That is, they are operational attributes.
   *
   *    directoryOperation usage indicates that the attribute of this type is
   *    a directory operational attribute.  distributedOperation usage
   *    indicates that the attribute of this DSA-shared usage operational
   *    attribute.  dSAOperation usage indicates that the attribute of this
   *    type is a DSA-specific operational attribute.
   *
   *    NO-USER-MODIFICATION requires an operational usage.
   *
  *    Note that the [AttributeTypeDescription] does not list the matching
  *    rules which can be used with that attribute type in an extensibleMatch
  *    search filter.  This is done using the 'matchingRuleUse' attribute
  *    described in Section 4.1.4.
  *
  *    This document refines the schema description of X.501 by requiring
  *    that the SYNTAX field in an [AttributeTypeDescription] be a string
  *    representation of an object identifier for the LDAP string syntax
  *    definition with an optional indication of the suggested minimum bound
  *    of a value of this attribute.
  *
  *    A suggested minimum upper bound on the number of characters in a value
  *    with a string-based syntax, or the number of bytes in a value for all
  *    other syntaxes, may be indicated by appending this bound count inside
  *    of curly braces following the syntax's OBJECT IDENTIFIER in an
  *
  *    Attribute Type Description.  This bound is not part of the syntax name
  *    itself.  For instance, &quot;1.3.6.4.1.1466.0{64}&quot; suggests that server
  *    implementations should allow a string to be 64 characters long,
  *    although they may allow longer strings.  Note that a single character
  *    of the Directory String syntax may be encoded in more than one octet
  *    since UTF-8 is a variable-length encoding.
  * </pre>
  *
  * @see <a href="http://www.faqs.org/rfcs/rfc2252.html">RFC 2252 Section 4.2</a>
  * @see <a
  *      href="http://www.ietf.org/internet-drafts/draft-ietf-ldapbis-models-11.txt">
  *      ldapbis [MODELS]</a>
  * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
  */
 public class MutableAttributeType extends AttributeType
 {
     /** The mandatory serialVersionUID */
     public static final long serialVersionUID = 1L;
 
 
     /**
      * Creates a AttributeType object using a unique OID.
      *
      * @param oid the OID for this AttributeType
      */
     public MutableAttributeType( String oid )
     {
         super( oid );
     }
 
 
     /**
      * Tells if this AttributeType is Single Valued or not
      *
      * @param singleValued True if the AttributeType is single-valued
      */
     public void setSingleValued( boolean singleValued )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.isSingleValued = singleValued;
         }
     }
 
 
     /**
      * Tells if this AttributeType can be modified by a user or not
      *
      * @param userModifiable The flag to set
      */
     public void setUserModifiable( boolean userModifiable )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.canUserModify = userModifiable;
         }
     }
 
 
     /**
      * Updates the collective flag
      *
      * @param collective The new value to set
      */
     public void updateCollective( boolean collective )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         this.isCollective = collective;
     }
 
 
     /**
      * Sets the collective flag
      *
      * @param collective The new value to set
      */
     public void setCollective( boolean collective )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.isCollective = collective;
         }
     }
 
 
     /**
      * Sets the AttributeType usage, one of :
      * <ul>
      *   <li>USER_APPLICATIONS</li>
      *   <li>DIRECTORY_OPERATION</li>
      *   <li>DISTRIBUTED_OPERATION</li>
      *   <li>DSA_OPERATION</li>
      * </ul>
      * 
      * @see UsageEnum
      * @param usage The AttributeType usage
      */
     public void setUsage( UsageEnum usage )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.usage = usage;
         }
     }
 
 
     /**
      * Updates the AttributeType usage, one of :
      * <ul>
      *   <li>USER_APPLICATIONS</li>
      *   <li>DIRECTORY_OPERATION</li>
      *   <li>DISTRIBUTED_OPERATION</li>
      *   <li>DSA_OPERATION</li>
      * </ul>
      * 
      * @see UsageEnum
      * @param newUsage The AttributeType usage
      */
     public void updateUsage( UsageEnum newUsage )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         this.usage = newUsage;
     }
 
 
     /**
      * Sets the length limit of this AttributeType based on its associated
      * syntax.
      *
      * @param length the new length to set
      */
     public void setSyntaxLength( long length )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.syntaxLength = length;
         }
     }
 
 
     /**
      * Sets the superior AttributeType OID of this AttributeType
      *
      * @param superiorOid The superior AttributeType OID of this AttributeType
      */
     public void setSuperiorOid( String superiorOid )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.superiorOid = superiorOid;
         }
     }
 
 
     /**
      * Sets the superior for this AttributeType
      *
      * @param superior The superior for this AttributeType
      */
     public void setSuperior( MutableAttributeType superior )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.superior = superior;
             this.superiorOid = superior.getOid();
         }
     }
 
 
     /**
      * Sets the superior oid for this AttributeType
      *
      * @param newSuperiorOid The superior oid for this AttributeType
      */
     public void setSuperior( String newSuperiorOid )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.superiorOid = newSuperiorOid;
         }
     }
 
 
     /**
      * Update the associated Superior AttributeType, even if the SchemaObject is readOnly
      *
      * @param newSuperior The superior for this AttributeType
      */
     public void updateSuperior( MutableAttributeType newSuperior )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         this.superior = newSuperior;
         this.superiorOid = newSuperior.getOid();
     }
 
 
     /**
      * Sets the Syntax OID for this AttributeType
      *
      * @param syntaxOid The syntax OID for this AttributeType
      */
     public void setSyntaxOid( String syntaxOid )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.syntaxOid = syntaxOid;
         }
     }
 
 
     /**
      * Sets the Syntax for this AttributeType
      *
      * @param syntax The Syntax for this AttributeType
      */
     public void setSyntax( LdapSyntax syntax )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.syntax = syntax;
             this.syntaxOid = syntax.getOid();
         }
     }
 
 
     /**
      * Update the associated Syntax, even if the SchemaObject is readOnly
      *
      * @param newSyntax The Syntax for this AttributeType
      */
     public void updateSyntax( LdapSyntax newSyntax )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         this.syntax = newSyntax;
         this.syntaxOid = newSyntax.getOid();
     }
 
 
     /**
      * Sets the Equality OID for this AttributeType
      *
      * @param equalityOid The Equality OID for this AttributeType
      */
     public void setEqualityOid( String equalityOid )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.equalityOid = equalityOid;
         }
     }
 
 
     /**
      * Sets the Equality MR for this AttributeType
      *
      * @param equality The Equality MR for this AttributeType
      */
     public void setEquality( MatchingRule equality )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.equality = equality;
             this.equalityOid = equality.getOid();
         }
     }
 
 
     /**
      * Update the associated Equality MatchingRule, even if the SchemaObject is readOnly
      *
      * @param newEquality The Equality MR for this AttributeType
      */
     public void updateEquality( MatchingRule newEquality )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         this.equality = newEquality;
         this.equalityOid = newEquality.getOid();
     }
 
 
     /**
      * Sets the Ordering OID for this AttributeType
      *
      * @param orderingOid The Ordering OID for this AttributeType
      */
     public void setOrderingOid( String orderingOid )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.orderingOid = orderingOid;
         }
     }
 
 
     /**
      * Sets the Ordering MR for this AttributeType
      *
      * @param ordering The Ordering MR for this AttributeType
      */
     public void setOrdering( MatchingRule ordering )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.ordering = ordering;
             this.orderingOid = ordering.getOid();
         }
     }
 
 
     /**
      * Update the associated Ordering MatchingRule, even if the SchemaObject is readOnly
      *
      * @param newOrdering The Ordering MR for this AttributeType
      */
     public void updateOrdering( MatchingRule newOrdering )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         this.ordering = newOrdering;
         this.orderingOid = newOrdering.getOid();
     }
 
 
     /**
      * Sets the Substr OID for this AttributeType
      *
      * @param substrOid The Substr OID for this AttributeType
      */
     public void setSubstringOid( String substrOid )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.substringOid = substrOid;
         }
     }
 
 
     /**
      * Sets the Substr MR for this AttributeType
      *
      * @param substring The Substr MR for this AttributeType
      */
     public void setSubstring( MatchingRule substring )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         if ( !isReadOnly )
         {
             this.substring = substring;
             this.substringOid = substring.getOid();
         }
     }
 
 
     /**
      * Update the associated Substring MatchingRule, even if the SchemaObject is readOnly
      *
      * @param newSubstring The Substr MR for this AttributeType
      */
     public void updateSubstring( MatchingRule newSubstring )
     {
         if ( locked )
         {
             throw new UnsupportedOperationException( I18n.err( I18n.ERR_04441, getName() ) );
         }
 
         this.substring = newSubstring;
         this.substringOid = newSubstring.getOid();
     }
 
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void clear()
     {
         // Clear the common elements
         super.clear();
 
         // Clear the references
         equality = null;
         ordering = null;
         substring = null;
         superior = null;
         syntax = null;
     }
 }