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43 package net.java.html.js;
45 import java.lang.annotation.ElementType;
46 import java.lang.annotation.Retention;
47 import java.lang.annotation.RetentionPolicy;
48 import java.lang.annotation.Target;
50 /** Put this annotation on a method to provide its special implementation
51 * in JavaScript. This is a way to define <em>native</em> methods that
52 * interact with the surrounding JavaScript environment. Check the list
53 * <a href="package-summary.html">use-cases</a> to see real world
54 * use of this annotation.
56 * Visit an <a target="_blank" href="http://dew.apidesign.org/dew/#7102188">on-line demo</a>
57 * to play with {@link JavaScriptBody} annotation for real.
59 * @author Jaroslav Tulach <jtulach@netbeans.org>
61 @Retention(RetentionPolicy.CLASS)
62 @Target({ ElementType.METHOD, ElementType.CONSTRUCTOR })
63 public @interface JavaScriptBody {
64 /** Names of parameters for the method generated method that can
65 * be referenced from {@link #body()}.
67 * @return array of the names of parameters for the method
70 public String[] args();
72 /** The actual body of the method in JavaScript. This string will be
73 * put into generated header (last character is '{') and footer (e.g. '}').
74 * The body can reference provided arguments. In case of non-static
75 * instance method it may reference <code>this</code>.
77 * @return JavaScript body of a function which can access {@link #args()} and possibly
82 /** Should a special syntax for calling back into Java object be turned on?
83 * The syntax begins with <b>{@code @}</b> followed by fully qualified
84 * package name of the class. Now followed by <b>::</b> and a method in
85 * the class followed by its parameters enclosed inside <b>(...)</b>.
86 * This is the syntax one can use to call <code>run()</code>
87 * method of {@link Runnable}:
88 * <pre>r.@java.lang.Runnable::run()()</pre>.
89 * One can also call static methods. Just use:
90 * <pre>var ten = @java.lang.Integer::parseInt(Ljava/lang/String;)("10")</pre>
92 * @return true, if the script should be scanned for special callback
95 public boolean javacall() default false;