ivaluetype.java

老外的在线考试

/*
 * Core - Library of useful classes that are used in many CyberDemia projects.
 * Copyright (C) 2003 CyberDemia Research and Services
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA.
 *
 * See the COPYING file located in the top-level-directory of
 * the archive of this library for complete text of license.
 */
package com.cyberdemia.value;

/**
* IValueType is an interface for a mutable object that stores a value.
* E.g. a wrapper for a primitive type.
*
* @author  Alexander Yap
* @version $Revision: 1.2 $ at $Date: 2004/02/18 08:35:30 $ by $Author: alexycyap $
*/
public interface IValueType
{
	/**
	* Sets the value as a double.
	* @param val  Value to set.
	*/
	void setDoubleValue( double val );

	/**
	* Sets the value as a float.
	* @param val  Value to set.
	*/
	void setFloatValue( float val );

	/**
	* Sets the value as a long.
	* @param val  Value to set.
	*/
	void setLongValue( long val );

	/**
	* Sets the value as an int.
	* @param val  Value to set.
	*/
	void setIntValue( int val );

	/**
	* Sets the value as a short.
	* @param val  Value to set.
	*/
	void setShortValue( short val );

	/**
	* Sets the value as a char.
	* @param val  Value to set.
	*/
	void setCharValue( char val );

	/**
	* Sets the value as a byte.
	* @param val  Value to set.
	*/
	void setByteValue( byte val );

	/**
	* Sets the value as a String.
	* @param val  Value to set.
	*/
	void setStringValue( String val );

	/**
	* Gets the value as a double.
	* @return  Value of this object as a double.
	*/
	double getDoubleValue();

	/**
	* Gets the value as a float.
	* @return  Value of this object as a float.
	*/
	float getFloatValue();

	/**
	* Gets the value as a long.
	* @return  Value of this object as a long.
	*/
	long getLongValue();

	/**
	* Gets the value as an int.
	* @return  Value of this object as an int.
	*/
	int getIntValue();

	/**
	* Gets the value as a short.
	* @return  Value of this object as a short.
	*/
	short getShortValue();

	/**
	* Gets the value as a char.
	* @return  Value of this object as a char.
	*/
	char getCharValue();

	/**
	* Gets the value as a byte.
	* @return  Value of this object as a byte.
	*/
	byte getByteValue();

	/**
	* Gets the value as a String.
	* @return  Value of this object as a String.
	*/
	String getStringValue();
	
	/**
	* Adds this object with another IValueType.
	* @param val2   IValueType to add.
	*/
	void add( IValueType val2 );

	/**
	* Subtracts another IValueType from this object.
	* @param val2   IValueType to subtract.
	*/
	void subtract( IValueType val2 );
	
	/**
	* Multiplies this object with another IValueType.
	* @param val2   IValueType to multiply with.
	*/
	void multiply( IValueType val2 );
	
	/**
	* Multiplies this object with a Number.
	* @param val2   Number to multiply with.
	*/
	void multiply( Number val2 );
	
	/**
	* Divides this object with another IValueType.
	* @param val2   IValueType to divide.
	*/
	void divide( IValueType val2 );

	/**
	* Divides this object with a Number.
	* @param val2   Number to divide.
	*/
	void divide( Number val2 );

	/**
	* Gets the value as a Number object.
	* @return Number object
	*/
	Number getNumber();

}