com.espertech.esper.client.soda
Class PreviousExpression

java.lang.Object
  extended by com.espertech.esper.client.soda.ExpressionBase
      extended by com.espertech.esper.client.soda.PreviousExpression
All Implemented Interfaces:
Expression, Serializable

public class PreviousExpression
extends ExpressionBase

Previous function for obtaining property values of previous events.

See Also:
Serialized Form

Constructor Summary
PreviousExpression()
          Ctor.
PreviousExpression(Expression expression, String propertyName)
          Ctor.
PreviousExpression(int index, String propertyName)
          Ctor.
 
Method Summary
 void toEPL(StringWriter writer)
          Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.
 
Methods inherited from class com.espertech.esper.client.soda.ExpressionBase
addChild, getChildren
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PreviousExpression

public PreviousExpression()
Ctor.


PreviousExpression

public PreviousExpression(Expression expression,
                          String propertyName)
Ctor.

Parameters:
expression - provides the index to use
propertyName - is the name of the property to return the value for

PreviousExpression

public PreviousExpression(int index,
                          String propertyName)
Ctor.

Parameters:
index - provides the index
propertyName - is the name of the property to return the value for
Method Detail

toEPL

public void toEPL(StringWriter writer)
Description copied from interface: Expression
Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Parameters:
writer - is the output to use

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