trunk/gora-cassandra/src/main/java/org/apache/gora/cassandra/query/CassandraQuery.java

/**
 * 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.gora.cassandra.query;

import java.util.List;
import java.util.Map;

import org.apache.gora.persistency.Persistent;
import org.apache.gora.query.Query;
import org.apache.gora.query.impl.QueryBase;
import org.apache.gora.store.DataStore;

public class CassandraQuery<K, T extends Persistent> extends QueryBase<K, T> {

  private Query<K, T> query;
  
  /**
   * Maps Avro fields to Cassandra columns.
   */
  private Map<String, List<String>> familyMap;
  
  public CassandraQuery() {
    super(null);
  }
  public CassandraQuery(DataStore<K, T> dataStore) {
    super(dataStore);
  }
  public void setFamilyMap(Map<String, List<String>> familyMap) {
    this.familyMap = familyMap;
  }
  public Map<String, List<String>> getFamilyMap() {
    return familyMap;
  }
  
  /**
   * @param family the family name
   * @return an array of the query column names belonging to the family
   */
  public String[] getColumns(String family) {
    
    List<String> columnList = familyMap.get(family);
    String[] columns = new String[columnList.size()];
    for (int i = 0; i < columns.length; ++i) {
      columns[i] = columnList.get(i);
    }
    return columns;
  }
  public Query<K, T> getQuery() {
    return query;
  }
  public void setQuery(Query<K, T> query) {
    this.query = query;
  }
  
  

}