/*
 * The contents of this file are subject to the terms of the Common Development and
 * Distribution License (the License). You may not use this file except in compliance with the
 * License.
 *
 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
 * specific language governing permission and limitations under the License.
 *
 * When distributing Covered Software, include this CDDL Header Notice in each file and include
 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
 * Header, with the fields enclosed by brackets [] replaced by your own identifying
 * information: "Portions Copyright [year] [name of copyright owner]".
 *
 * Copyright 2006-2010 Sun Microsystems, Inc.
 * Portions Copyright 2011-2015 ForgeRock AS.
 */

package org.opends.server.schema;

import static org.opends.server.schema.SchemaConstants.*;

import org.forgerock.i18n.LocalizableMessageBuilder;
import org.forgerock.i18n.slf4j.LocalizedLogger;
import org.forgerock.opendj.ldap.ByteSequence;
import org.forgerock.opendj.ldap.schema.Schema;
import org.forgerock.opendj.ldap.schema.SyntaxImpl;
import org.opends.server.types.DN;
import org.opends.server.types.DirectoryException;
import org.opends.server.types.SubtreeSpecification;

/**
 * Implementation of the subtree specification attribute syntax, which is used
 * to specify the scope of sub-entries (RFC 3672).
 */
final class SubtreeSpecificationSyntaxImpl implements SyntaxImpl
{
  private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();

  @Override
  public String getName()
  {
    return SchemaConstants.SYNTAX_SUBTREE_SPECIFICATION_NAME;
  }

  @Override
  public String getEqualityMatchingRule()
  {
    return EMR_OCTET_STRING_OID;
  }

  @Override
  public String getOrderingMatchingRule()
  {
    return OMR_OCTET_STRING_OID;
  }

  /** {@inheritDoc} */
  @Override
  public String getApproximateMatchingRule()
  {
    return null;
  }

  /** {@inheritDoc} */
  @Override
  public String getSubstringMatchingRule()
  {
    return null;
  }

  /** {@inheritDoc} */
  @Override
  public boolean valueIsAcceptable(final Schema schema, final ByteSequence value,
      final LocalizableMessageBuilder invalidReason)
  {
    // Use the subtree specification code to make this determination.
    try
    {
      SubtreeSpecification.valueOf(DN.rootDN(), value.toString());

      return true;
    }
    catch (DirectoryException e)
    {
      logger.traceException(e);

      invalidReason.append(e.getMessageObject());
      return false;
    }
  }

  @Override
  public boolean isHumanReadable()
  {
    return true;
  }

  /** {@inheritDoc} */
  @Override
  public boolean isBEREncodingRequired()
  {
    return false;
  }

}