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## org.drools.runtime.rule
Interface AccumulateFunction

All Superinterfaces:
  Externalizable, Serializable

All Known Subinterfaces:
  TypedAccumulateFunction

    public interface AccumulateFunction

extends Externalizable

An interface for accumulate external function implementations

Method Summary
`void` | `accumulate(Serializable context, Object value)` Executes the accumulation action
`Serializable` | `createContext()` Creates and returns a new context object
`Object` | `getResult(Serializable context)` Returns the current value in this accumulation session
`void` | `init(Serializable context)` Initializes the accumulator
`void` | `reverse(Serializable context, Object value)` Reverses the accumulation action
`boolean` | `supportsReverse()` True if the function supports reverse.

Methods inherited from interface java.io.Externalizable
`readExternal, writeExternal`

Method Detail

### createContext

    Serializable createContext()

  Creates and returns a new context object

  Returns:

### init

    void init(Serializable context)
              throws Exception

  Initializes the accumulator

  Parameters:
    `context` -
  Throws:
    `Exception`

### accumulate

    void accumulate(Serializable context,
                    Object value)

  Executes the accumulation action

  Parameters:
    `context` -
    `value` -

### reverse

    void reverse(Serializable context,
                 Object value)
                 throws Exception

  Reverses the accumulation action

  Parameters:
    `context` -
    `value` -
  Throws:
    `Exception`

### getResult

    Object getResult(Serializable context)
                     throws Exception

  Returns the current value in this accumulation session

  Parameters:
    `context` -
  Returns:
  Throws:
    `Exception`

### supportsReverse

    boolean supportsReverse()

  True if the function supports reverse. False otherwise.

  Returns:

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