recognizermonitor.java

It is the Speech recognition software. It is platform independent. To execute the source code,

/*
 * 
 * Copyright 1999-2004 Carnegie Mellon University.  
 * Portions Copyright 2004 Sun Microsystems, Inc.  
 * Portions Copyright 2004 Mitsubishi Electric Research Laboratories.
 * All Rights Reserved.  Use is subject to license terms.
 * 
 * See the file "license.terms" for information on usage and
 * redistribution of this file, and for a DISCLAIMER OF ALL 
 * WARRANTIES.
 *
 */
package edu.cmu.sphinx.instrumentation;

import java.util.Iterator;
import java.util.List;
import edu.cmu.sphinx.recognizer.Recognizer;
import edu.cmu.sphinx.recognizer.RecognizerState;
import edu.cmu.sphinx.recognizer.StateListener;
import edu.cmu.sphinx.util.props.Configurable;
import edu.cmu.sphinx.util.props.PropertyException;
import edu.cmu.sphinx.util.props.PropertySheet;
import edu.cmu.sphinx.util.props.PropertyType;
import edu.cmu.sphinx.util.props.Registry;

/**
 *Monitor the state transitions of a given recognizer. This monitor maintains
 * lists of components that should be 'run' when a recognizer state change is
 * detected.
 */
public class RecognizerMonitor implements Configurable, StateListener {
    /**
     * the sphinx property for the recognizer to monitor
     */
    public final static String PROP_RECOGNIZER = "recognizer";
    /**
     * The sphinx property that defines all of the monitors to call when the
     * recognizer is allocated
     */
    public final static String PROP_ALLOCATED_MONITORS = "allocatedMonitors";
    /**
     * The sphinx property that defines all of the monitors to call when the
     * recognizer is deallocated
     */
    public final static String PROP_DEALLOCATED_MONITORS = "deallocatedMonitors";
    // --------------------------
    // Configuration data
    // --------------------------
    Recognizer recognizer;
    List allocatedMonitors;
    List deallocatedMonitors;
    String name;

    /*
     * (non-Javadoc)
     * 
     * @see edu.cmu.sphinx.util.props.Configurable#register(java.lang.String,
     *      edu.cmu.sphinx.util.props.Registry)
     */
    public void register(String name, Registry registry)
            throws PropertyException {
        this.name = name;
        registry.register(PROP_RECOGNIZER, PropertyType.COMPONENT);
        registry.register(PROP_ALLOCATED_MONITORS, PropertyType.COMPONENT_LIST);
        registry.register(PROP_DEALLOCATED_MONITORS,
                PropertyType.COMPONENT_LIST);
    }

    /*
     * (non-Javadoc)
     * 
     * @see edu.cmu.sphinx.util.props.Configurable#newProperties(edu.cmu.sphinx.util.props.PropertySheet)
     */
    public void newProperties(PropertySheet ps) throws PropertyException {
        Recognizer newRecognizer = (Recognizer) ps.getComponent(
                PROP_RECOGNIZER, Recognizer.class);
        if (recognizer == null) {
            recognizer = newRecognizer;
            recognizer.addStateListener(this);
        } else if (recognizer != newRecognizer) {
            recognizer.removeStateListener(this);
            recognizer = newRecognizer;
            recognizer.addStateListener(this);
        }
        allocatedMonitors = ps.getComponentList(PROP_ALLOCATED_MONITORS,
                Runnable.class);
        deallocatedMonitors = ps.getComponentList(PROP_DEALLOCATED_MONITORS,
                Runnable.class);
    }

    /*
     * (non-Javadoc)
     * 
     * @see edu.cmu.sphinx.util.props.Configurable#getName()
     */
    public String getName() {
        return name;
    }

    /*
     * (non-Javadoc)
     * 
     * @see edu.cmu.sphinx.recognizer.StateListener#statusChanged(edu.cmu.sphinx.recognizer.RecognizerState)
     */
    public void statusChanged(RecognizerState status) {
        List runnableList = null;
        if (status == RecognizerState.ALLOCATED) {
            runnableList = allocatedMonitors;
        } else if (status == RecognizerState.DEALLOCATED) {
            runnableList = deallocatedMonitors;
        }
        if (runnableList != null) {
            for (Iterator i = runnableList.iterator(); i.hasNext();) {
                Runnable r = (Runnable) i.next();
                r.run();
            }
        }
    }
}