package org.apache.archiva.metadata;
   
   /*
    * 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.
   */
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  /**
   *
   * This class is used to provide additional query parameters to search queries.
   * These parameters are hints for the metadata repository implementation, some parameters may be ignored.
   *
   * The defaults are:
   * <li>
   *     <ul>Sort order: ascending</ul>
   *     <ul>Offset: 0</ul>
   *     <ul>Limit: Long.MAX_VALUE</ul>
   *     <ul>Sort fields: empty, which means it depends on the query</ul>
   * </li>
   *
   * @author Martin Stockhammer <martin_s@apache.org>
   */
  public class QueryParameter {
  
      final boolean ascending;
      final List<String> sortFields;
      final long offset;
      final long limit;
  
      public QueryParameter(boolean isAscending, long offset, long limit, String... sortFields) {
          this.ascending = isAscending;
          this.offset = offset;
          this.limit = limit;
          this.sortFields = Arrays.asList(sortFields);
      }
  
      public QueryParameter(long offset, long limit) {
          this.offset=offset;
          this.limit = limit;
          this.ascending = true;
          this.sortFields = Collections.emptyList();
      }
  
      public QueryParameter(boolean isAscending, long offset, long limit) {
          this.ascending = isAscending;
          this.offset = offset;
          this.limit = limit;
          this.sortFields = Collections.emptyList();
      }
  
      public QueryParameter(long limit) {
          this.offset=0;
          this.ascending=true;
          this.limit=limit;
          this.sortFields = Collections.emptyList();
      }
  
      public QueryParameter() {
          this.ascending = true;
          this.sortFields = Collections.emptyList();
          this.offset = 0;
          this.limit = Long.MAX_VALUE;
      }
  
      public boolean isAscending() {
          return ascending;
      }
  
      public List<String> getSortFields() {
          return sortFields;
      }
  
      public long getOffset() {
          return offset;
      }
  
      public long getLimit() {
          return limit;
      }
  }