package runEnv;

public class RunValue {

	Object value;

	public RunValue( int i ) {
		value = new Integer( i );
		}

	public RunValue( char c ) {
		value = new Character( c );
		}

	public RunValue( double d ) {
		value = new Double( d );
		}

	public RunValue( boolean b ) {
		value = new Boolean( b );
		}

	public RunValue( String s ) {
		value = s;
		}

	public RunValue( Multiple m ) {
		value = m;
		}

	public RunValue( RunValue v ) {
		value = v.getValue();
		}

	public RunValue() {
		value = null;
		}

	public Object getValue() {
		return value;
		}

	public int intValue() {
		if ( value == null )
			throw new Error( "uninitialised value" );
		else if ( ! ( value instanceof Integer ) )
			throw new Error( "Invalid type for value" );
		else {
			Integer i = ( Integer ) value;
			return i.intValue();
			}
		}

	public char charValue() {
		if ( value == null )
			throw new Error( "uninitialised value" );
		else if ( ! ( value instanceof Character ) )
			throw new Error( "Invalid type for value" );
		else {
			Character c = ( Character ) value;
			return c.charValue();
			}
		}

	public double realValue() {
		if ( value == null )
			throw new Error( "uninitialised value" );
		else if ( ! ( value instanceof Double ) )
			throw new Error( "Invalid type for value" );
		else {
			Double d = ( Double ) value;
			return d.doubleValue();
			}
		}

	public boolean boolValue() {
		if ( value == null )
			throw new Error( "uninitialised value" );
		else if ( ! ( value instanceof Boolean ) )
			throw new Error( "Invalid type for value" );
		else {
			Boolean b = ( Boolean ) value;
			return b.booleanValue();
			}
		}

	public String stringValue() {
		if ( value == null )
			return "null";
		else {
			return value.toString();
			}
		}

	public String toString() {
		if ( value == null )
			return "null";
		else {
			return value.toString();
			}
		}

	public Multiple multipleValue() {
		if ( value == null )
			return null;
		else if ( ! ( value instanceof Multiple ) )
			throw new Error( "Invalid type for value" );
		else {
			return ( Multiple ) value;
			}
		}

	}