/*
 * Copyright 2009 The Apache Software Foundation
 *
 * 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.hadoop.hbase.regionserver;

import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.hbase.HBaseTestCase;
import org.apache.hadoop.hbase.regionserver.ScanQueryMatcher.MatchCode;
import org.apache.hadoop.hbase.util.Bytes;

public class TestScanWildcardColumnTracker extends HBaseTestCase {

  final static int VERSIONS = 2;

  public void testCheckColumn_Ok() {
    ScanWildcardColumnTracker tracker =
      new ScanWildcardColumnTracker(VERSIONS);

    //Create list of qualifiers
    List<byte[]> qualifiers = new ArrayList<byte[]>();
    qualifiers.add(Bytes.toBytes("qualifer1"));
    qualifiers.add(Bytes.toBytes("qualifer2"));
    qualifiers.add(Bytes.toBytes("qualifer3"));
    qualifiers.add(Bytes.toBytes("qualifer4"));

    //Setting up expected result
    List<MatchCode> expected = new ArrayList<MatchCode>();
    expected.add(ScanQueryMatcher.MatchCode.INCLUDE);
    expected.add(ScanQueryMatcher.MatchCode.INCLUDE);
    expected.add(ScanQueryMatcher.MatchCode.INCLUDE);
    expected.add(ScanQueryMatcher.MatchCode.INCLUDE);

    List<ScanQueryMatcher.MatchCode> actual = new ArrayList<MatchCode>();

    for(byte [] qualifier : qualifiers) {
      ScanQueryMatcher.MatchCode mc = tracker.checkColumn(qualifier, 0,
          qualifier.length, 1);
      actual.add(mc);
    }

    //Compare actual with expected
    for(int i=0; i<expected.size(); i++) {
      assertEquals(expected.get(i), actual.get(i));
    }
  }

  public void testCheckColumn_EnforceVersions() {
    ScanWildcardColumnTracker tracker =
      new ScanWildcardColumnTracker(VERSIONS);

    //Create list of qualifiers
    List<byte[]> qualifiers = new ArrayList<byte[]>();
    qualifiers.add(Bytes.toBytes("qualifer1"));
    qualifiers.add(Bytes.toBytes("qualifer1"));
    qualifiers.add(Bytes.toBytes("qualifer1"));
    qualifiers.add(Bytes.toBytes("qualifer2"));

    //Setting up expected result
    List<ScanQueryMatcher.MatchCode> expected = new ArrayList<MatchCode>();
    expected.add(ScanQueryMatcher.MatchCode.INCLUDE);
    expected.add(ScanQueryMatcher.MatchCode.INCLUDE);
    expected.add(ScanQueryMatcher.MatchCode.SEEK_NEXT_COL);
    expected.add(ScanQueryMatcher.MatchCode.INCLUDE);

    List<MatchCode> actual = new ArrayList<ScanQueryMatcher.MatchCode>();

    long timestamp = 0;
    for(byte [] qualifier : qualifiers) {
      MatchCode mc = tracker.checkColumn(qualifier, 0, qualifier.length,
          ++timestamp);
      actual.add(mc);
    }

    //Compare actual with expected
    for(int i=0; i<expected.size(); i++) {
      assertEquals(expected.get(i), actual.get(i));
    }
  }

  public void DisabledTestCheckColumn_WrongOrder() {
    ScanWildcardColumnTracker tracker =
      new ScanWildcardColumnTracker(VERSIONS);

    //Create list of qualifiers
    List<byte[]> qualifiers = new ArrayList<byte[]>();
    qualifiers.add(Bytes.toBytes("qualifer2"));
    qualifiers.add(Bytes.toBytes("qualifer1"));

    boolean ok = false;

    try {
      for(byte [] qualifier : qualifiers) {
        tracker.checkColumn(qualifier, 0, qualifier.length, 1);
      }
    } catch (Exception e) {
      ok = true;
    }

    assertEquals(true, ok);
  }

}