/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
 * by brackets "[]" replaced with your own identifying information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2009 Sun Microsystems, Inc.
 */
package org.opends.sdk.schema;



import java.util.Comparator;
import java.util.List;

import org.opends.sdk.Assertion;
import org.opends.sdk.ByteSequence;
import org.opends.sdk.ConditionResult;
import org.opends.sdk.DecodeException;



/**
 * This class implements a default equality or approximate matching rule
 * that matches normalized values in byte order.
 */
abstract class AbstractMatchingRuleImpl implements MatchingRuleImpl
{
  static class DefaultEqualityAssertion implements Assertion
  {
    ByteSequence normalizedAssertionValue;



    protected DefaultEqualityAssertion(
        ByteSequence normalizedAssertionValue)
    {
      this.normalizedAssertionValue = normalizedAssertionValue;
    }



    public ConditionResult matches(ByteSequence attributeValue)
    {
      return normalizedAssertionValue.equals(attributeValue) ? ConditionResult.TRUE
          : ConditionResult.FALSE;
    }
  }

  private static final Assertion UNDEFINED_ASSERTION = new Assertion()
  {
    public ConditionResult matches(ByteSequence attributeValue)
    {
      return ConditionResult.UNDEFINED;
    }
  };

  private static final Comparator<ByteSequence> DEFAULT_COMPARATOR =
      new Comparator<ByteSequence>()
      {
        public int compare(ByteSequence o1, ByteSequence o2)
        {
          return o1.compareTo(o2);
        }
      };



  AbstractMatchingRuleImpl()
  {
    // Nothing to do.
  }



  public Comparator<ByteSequence> comparator(Schema schema)
  {
    return DEFAULT_COMPARATOR;
  }



  public Assertion getAssertion(Schema schema, ByteSequence value)
      throws DecodeException
  {
    return new DefaultEqualityAssertion(normalizeAttributeValue(schema,
        value));
  }



  public Assertion getAssertion(Schema schema, ByteSequence subInitial,
      List<? extends ByteSequence> subAnyElements, ByteSequence subFinal)
      throws DecodeException
  {
    return UNDEFINED_ASSERTION;
  }



  public Assertion getGreaterOrEqualAssertion(Schema schema,
      ByteSequence value) throws DecodeException
  {
    return UNDEFINED_ASSERTION;
  }



  public Assertion getLessOrEqualAssertion(Schema schema,
      ByteSequence value) throws DecodeException
  {
    return UNDEFINED_ASSERTION;
  }
}