Class com.phrasys.phraser.Phraser

java.lang.Object
    |
    +----com.phrasys.phraser.Phraser

public class Phraser

extends java.lang.Object

implements com.phrasys.phraser.TNController, WordListener, java.io.Serializable

The typical way of using this class would be to register it as a WordListener to a parts-of-speech tagger, and to have another WordListener listen to its output. Phrase mark-up is emitted in the form of tags like <phrase type="NP"> and can be read out as a WordEvent.

The component relies on word class labels which have to be assigned to each word; these should be stored under the label "pos" in the incoming WordEvents.

Version:

1.1 (18/11/00)

Author:

Oliver Mason

Phraser()

Default Constructor.

addWordListener(WordListener)

Register word listeners.

getItem(int)

Get the token at the specified position.

getNetwork()

Get the name of the current network.

hasMoreData(int)

Check if more data is available.

matchArc(int, String)

Match a network arc.

recognisePhrases()

Process a sentence.

removeWordListener(WordListener)

De-register listeners

setNetwork(String)

Specify the network to use.

wordReceived(WordEvent)

receive a WordEvent.

public Phraser()

          Default Constructor.

public void setNetwork(java.lang.String filename) throws java.io.IOException

          Specify the network to use. The phrase recogniser uses a network definition file for processing. This method allows one to specify which file to use.

Parameters:

filename - the filename of the network file.

public java.lang.String getNetwork()

          Get the name of the current network.

Returns:

the network's name or null if no network has been set.

public boolean hasMoreData(int position)

          Check if more data is available.

Parameters:

position - the position in the sentence to test.

Returns:

true if the position is before the end of the sentence, false otherwise.

public boolean matchArc(int position,
                        java.lang.String label)

          Match a network arc.

Parameters:

position - the starting position in the sentence.

Returns:

true if the arc matches, false otherwise.

public java.lang.String getItem(int position)

          Get the token at the specified position.

Parameters:

position - the position to get.

Returns:

the token at that position.

public void recognisePhrases()

          Process a sentence. All phrases within the network are matched against the sentence data, and the annotated sentence is then sent out in the form of a sequence of WordEvent.

public void addWordListener(WordListener listener)

          Register word listeners.

Parameters:

listener - the listener to add.

public void removeWordListener(WordListener listener)

          De-register listeners

Parameters:

listener - the listener to add.

public void wordReceived(WordEvent event)

          receive a WordEvent. If the EOF is reached or the token is a sentence end tag the current sentence is processed by the recogniser.

Parameters:

event - the WordEvent that has been received.