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1   /*
2    * SummaryFunction.java
3    * Created on 23 Июль 2006 г., 22:00
4    */
5   
6   package org.weda.store;
7   
8   /**
9    *
10   * @author Mikhail Titov
11   */
12  public interface SummaryFunction {
13      public void startCalculation(Class valueType) 
14          throws SummaryFunctionException;
15      public void nextCalculation(Object nextValue);
16      public void finishCalculation();
17      public Object getResultValue();
18  }