Android Open Source - android-core I Count

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License

The source code is released under:

Apache License

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Java Source Code

/** 
 * [SIMINOV FRAMEWORK]/*from w w w  .  ja va  2  s.  co m*/
 * Copyright [2015] [Siminov Software Solution LLP|support@siminov.com]
 *
 * Licensed 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 siminov.core.database.design;

import siminov.core.exception.DatabaseException;

/**
 * Exposes API's to get count of the number of times that X is not NULL in a group.
 * The count(*) function (with no arguments) returns the total number of rows in the group.
 */
public interface ICount {

  /**
   * Used to specify DISTINCT condition.
   * @return ICount Interface.
   */
  public ICount distinct();
  
  /**
   * Column name of which condition will be specified.
   * @param column Name of column.
   * @return ICountClause Interface.
   */
  public ICountClause where(String column);
  
  /**
   * Used to provide manually created Where clause, instead of using API's.
   * @param whereClause Manually created where clause.
   * @return ICount Interface.
   */
  public ICount whereClause(String whereClause);
  
  /**
   * Used to specify AND condition between where clause.
   * @param column Name of column on which condition need to be specified.
   * @return ICountClause Interface.
   */
  public ICountClause and(String column);
  
  /**
   * Used to specify OR condition between where clause.
   * @param column Name of column on which condition need to be specified.
   * @return ICountClause Interface.
   */
  public ICountClause or(String column);

  /**
   * Used to specify GROUP BY statement in conjunction with the aggregate functions to group the result-set by one or more columns.
   * @param columns Name of columns.
   * @return ICount Interface.
   */
  public ICount groupBy(String...columns);
  
  /**
   * Used to specify HAVING clause to SQL because the WHERE keyword could not be used with aggregate functions.
   * @param column Name of column on which condition need to be applied.
   * @return ICountClause Interface.
   */
  public ICountClause having(String column);

  /**
   * Used to provide manually created Where clause, instead of using API's.
   * @param havingClause Where clause.
   * @return ICount Interface.
   */
  public ICount havingClause(String havingClause);
  
  /**
   * Used to provide name of column for which count will be calculated.
   * @param column Name of column.
   * @return ICount Interface.
   */
  public ICount column(String column);
  
  /**
   * Used to get count, this method should be called in last to calculate count.
   * @return Return count.
   * @throws DatabaseException Throws exception if any error occur while calculating count. 
   */
  public<T> T execute() throws DatabaseException;
  
}

Java Source Code List