| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| VoidMacro |
|
| 1.5;1.5 |
| 1 | /* | |
| 2 | * VoidMacro.java | |
| 3 | * | |
| 4 | * Created on March 26, 2001, 12:33 AM | |
| 5 | */ | |
| 6 | ||
| 7 | package org.webmacro.engine; | |
| 8 | ||
| 9 | import org.webmacro.Context; | |
| 10 | import org.webmacro.FastWriter; | |
| 11 | import org.webmacro.Macro; | |
| 12 | import org.webmacro.PropertyException; | |
| 13 | ||
| 14 | import java.io.IOException; | |
| 15 | ||
| 16 | /** | |
| 17 | * VoidMacro doesn't output data to the output stream, but will log a | |
| 18 | * debug message (if debugging is turned on) when either of it's | |
| 19 | * methods are called.<p> | |
| 20 | * | |
| 21 | * In addition, since this is a special-case Macro, and really only | |
| 22 | * used by the PropertyOperator and Variable classes, we have a public | |
| 23 | * static field called <code>instance</code> that will return an | |
| 24 | * already created instance of this guy. Since it doesn't do | |
| 25 | * anything, we really only need 1 of them around. | |
| 26 | * | |
| 27 | * @author e_ridge | |
| 28 | * @since 0.96 | |
| 29 | */ | |
| 30 | 2 | public final class VoidMacro implements Macro |
| 31 | { | |
| 32 | ||
| 33 | 2 | public static final VoidMacro instance = new VoidMacro(); |
| 34 | ||
| 35 | public void write (FastWriter out, Context context) | |
| 36 | throws PropertyException, IOException | |
| 37 | { | |
| 38 | // Don't do anything. | |
| 39 | 0 | } |
| 40 | ||
| 41 | /** | |
| 42 | * Always throws a new <code>PropertyException.VoidValueException</code> | |
| 43 | */ | |
| 44 | public Object evaluate (Context context) | |
| 45 | throws PropertyException | |
| 46 | { | |
| 47 | // We throw VoidValueException | |
| 48 | 0 | throw new PropertyException.VoidValueException(); |
| 49 | } | |
| 50 | ||
| 51 | } |