answertext.java

Creating the Auto Answering Machine Application

/*
Import required io classes
*/
import java.io.File;
/*
Import required util classes
*/
import java.util.Locale;
import java.util.Vector;
import javax.speech.synthesis.SynthesizerAdapter;
import javax.speech.synthesis.SynthesizerEvent;
import java.net.URL;

/*
Import required speech classes
*/
import javax.speech.synthesis.*;
import javax.speech.Central;
import javax.speech.Engine;
import javax.speech.EngineList;
import javax.speech.synthesis.Synthesizer;
import javax.speech.synthesis.SynthesizerModeDesc;
import javax.speech.synthesis.SynthesizerProperties;
import javax.speech.synthesis.Voice;
/*
Class:AnswerText-Speaks the text
	Fields:
		voiceName:Represents the voice selected by the end user.
		synthesizer:Represents an object of Synthesizer class.
	Methods:
		speakSelText():Uses the object of Synthesizer class to speak the text.
		closeSynthesizer():Closes the synthesizer and stops the speaking operation.
		pauseSynthesizer():Pauses the synthesizer.
		resumeSynthesizer():Resumes the paused speaking operation of the synthesizer.
*/
public class AnswerText  extends SynthesizerAdapter
{
	/*
	Declare variables
	*/
	URL url;
	String l;
	String voiceName;
	SynthesizerModeDesc desc;
	Synthesizer synthesizer;
	AutoAnswerObserver txtpad;

	/*
	AnswerText():
	Parameters:
			k:String representing the text that the synthesizer speaks.
			selvoice:String representing the voice selected by the end user.
	Return Type:NA
	*/
	public AnswerText(String k,String selvoice) 
	
	{
		
		/*
		Set the value of l to the text that the synthesizer speaks
		*/
		
		l=k;
		voiceName = selvoice;
		System.out.println("Using voice: " + voiceName);
		try 
		{
			/*
			Initialize an object of SynthesizerModeDesc class
			*/
			desc = new SynthesizerModeDesc(
			null,          
			"general",     
			Locale.US,     
			null,          
			null);         
			synthesizer = Central.createSynthesizer(desc);





			/*
			Prints the message if no synthesizer is available
			*/
			if (synthesizer == null) 
			{
				String message = "\nCan't find synthesizer.\n"
				+ "Make sure that there is a \"speech.properties\" file "
				+ "at either of these locations: \n";
				message += "user.home    : "
				+ System.getProperty("user.home") + "\n";
				message += "java.home/lib: " + System.getProperty("java.home")
				+ File.separator + "lib\n";
				System.err.println(message);
				System.exit(1);
			 }
			/*
			Allocate a synthesizer to speak text.
			*/
			synthesizer.allocate();
			synthesizer.resume();

			desc = (SynthesizerModeDesc) synthesizer.getEngineModeDesc();
			/*
			Retrieve all the available voices in an array
			*/
			Voice[] voices = desc.getVoices();
			Voice voice = null;
			for (int i = 0; i < voices.length; i++) 
			{
				if (voices[i].getName().equals(voiceName)) 
				{
					voice = voices[i];
					break;
				}
			}
			/*
			Print error message if selected voice is not available
			*/
			if (voice == null) 
			{
				System.err.println("Synthesizer does not have a voice named "
				+ voiceName + ".");
				System.exit(1);
			}
			/*
			Set the selected voice for the synthesizer
			*/
			synthesizer.getSynthesizerProperties().setVoice(voice);
		}
		catch(Exception e)
		{
			System.out.println(e);
		}
	}
	/*
	answerSelText():Speaks the text
	Parameters:NA
	Return Value:NA
	*/
	public void answerSelText(AutoAnswerObserver st)
	{
		try
			{
				txtpad=st;
				/*
				Invoke speakPlainText() method to speak the text.
				*/
				synthesizer.cancelAll();
				synthesizer.speakPlainText(l, null);
				System.out.println("Speaking Text");
			}
		catch (Exception e) 
			{
				e.printStackTrace();
			}
		try
			{
				/*
				Invoke waitEngineState() method to wait end of speech.
				*/
				synthesizer.waitEngineState(Synthesizer.QUEUE_EMPTY);
				
			}
		catch(Exception e)
			{
			}
					
	}
	
	/*
	closeSynthesizer():Close the synthesizer and stop the speaking operation.
	Parameters:NA
	Return Type:NA
	*/
	
	public void closeSynthesizer()
	{
		try
		{
			/*
			Stop the synthesizer and cancel the speaking operation
			*/
			synthesizer.cancelAll();
			System.out.println("Speaking Operation Cancelled");
		}
		catch (Exception e) 
		{
			e.printStackTrace();
		}
    }
	/*
	pauseSynthesizer():Pause the synthesizer. This pauses the text that the synthesizer is currently speaking.
	Parameters:NA
	Return Value:NA
	*/
	public void pauseSynthesizer()
	{
		try
		{
			/*
			Pause the synthesizer
			*/
			synthesizer.pause();
			System.out.println("Speaking Operation Paused");
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}
	/*
	resumeSynthesizer():Resumes the speaking operation that is paused by the end user.
	Parameters:NA
	Return Value:NA
	*/
	public void resumeSynthesizer()
	{
		try
		{
			/*
			Resume the synthesizer that speaks the text.
			*/
			synthesizer.resume();
			System.out.println("Speaking Operation Resumed");
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}
}