javolution.text.DefaultTextFormat Maven / Gradle / Ivy
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/*
* Javolution - Java(TM) Solution for Real-Time and Embedded Systems
* Copyright (C) 2012 - Javolution (http://javolution.org/)
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software is
* freely granted, provided that this notice is preserved.
*/
package javolution.text;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Specifies the default text format of a class (for parsing/formatting).
* The default format is typically used by the {@link Object#toString()}
* method and can be locally overridden in the scope of a
* {@link javolution.text.TextContext TextContext}.
*
* [code]
* @DefaultTextFormat(Complex.Cartesian.class)
* public class Complex {
* public String toString() { // Uses the default format unless locally overridden.
* return TextContext.toString(this);
* }
* public static Complex valueOf(CharSequence csq) {
* return TextContext.parse(csq, Complex.class);
* }
* public static class Cartesian extends TextFormat { ... }
* public static class Polar extends TextFormat { ... }
* }
* ...
* TextContext ctx = TextContext.enter(); // Enters a local textual context.
* try {
* ctx.setFormat(Complex.class, new Complex.Polar()); // Configure the local context.
* System.out.println(complexMatrix); // Displays complex numbers in polar coordinates.
* } finally {
* ctx.exit(); // Exits local context (reverts to previous Cartesian format).
* }[/code]
*
* @author Jean-Marie Dautelle
* @version 6.0, July 21, 2013
*/
@Documented
@Inherited
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface DefaultTextFormat {
/**
* Returns the default text format of the annotated class.
*/
Class> value();
}