com.voytechs.jnetstream.codec.filter
Class Filter

java.lang.Object
  com.voytechs.jnetstream.codec.filter.Filter

All Implemented Interfaces:

DecoderListener

public class Filter
extends java.lang.Object
implements DecoderListener

Applies a filter as the packets are being decoded.

Constructor Summary

Filter(java.lang.String expression, Linker linker)
Initializes the filter with the given expression.

Method Summary

Node	getExpressionAST()
java.lang.String	getFilterExpression()
void	processDecoderEvent(DecoderEvent event) Catches Decoder event that was fired.
void	setExpression(java.lang.String exp) Sets the current filter expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Filter

public Filter(java.lang.String expression,
              Linker linker)
       throws SyntaxError,
              NodeException

Initializes the filter with the given expression.

Parameters:

expression - Filter expression to parse

linker - Linker object which can link our filter expression

Throws:

SyntaxError - Any syntax errors in the filter expression

NodeException - Any filter runtime exceptions

Method Detail

processDecoderEvent

public void processDecoderEvent(DecoderEvent event)
                         throws AssertFailure

Catches Decoder event that was fired.

Specified by:

processDecoderEvent in interface DecoderListener

Parameters:

event - Decoder Event to be processed

Throws:

AssertFailure - Causes the current NPL structure being to be discarded. Such as Header, Packet or Field.

See Also:

DecoderEvent

setExpression

public void setExpression(java.lang.String exp)
                   throws SyntaxError,
                          NodeException

Sets the current filter expression. The expression is parsed and as packets are decoded applied to each.

Parameters:

exp - The filter expression to be parsed and linked

Throws:

SyntaxError

NodeException

getExpressionAST

public Node getExpressionAST()

getFilterExpression

public java.lang.String getFilterExpression()