context.java

来自「It is the Speech recognition software. 」· Java 代码 · 共 79 行

/*
 * Copyright 1999-2002 Carnegie Mellon University.  
 * Portions Copyright 2002 Sun Microsystems, Inc.  
 * Portions Copyright 2002 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.linguist.acoustic;

import java.io.Serializable;
/**
 * Represents  the context for a unit
 */
public class  Context implements Serializable {
    /**
     * Represents an empty context
     */
    public final static Context EMPTY_CONTEXT = new Context();

    /**
     * No instantiations allowed
     */
    protected Context() {
    }


    /**
     * Checks to see if there is a partial match with the given
     * context. For a simple context such as this we always match.
     *
     * @param context the context to check
     *
     * @return true if there is a partial match
     */
    public boolean isPartialMatch(Context context) {
	return true;
    }

    /**
     * Provides a string representation of a context
     */
    public String toString() {
	return "";
    }

    /**
     * Determines if an object is equal to this context
     * 
     * @param o the object to check
     *
     * @return true if the objects are equal
     */
    public boolean equals(Object o) {
	if (this == o) {
	    return true;
	} else if (o instanceof Context) {
	    Context otherContext = (Context) o;
	    return toString().equals(otherContext.toString());
	} else {
	    return false;
	}
    }

    /**
     * calculates a hashCode for this context. Since we defined an equals
     * for context, we must define a hashCode as well
     *
     * @return the hashcode for this object
     */
    public int hashCode() {
	return toString().hashCode();
    }
}