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package javax.ws.rs;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Binds the value(s) of a form parameter contained within a request entity body
 * to a resource method parameter. Values are URL decoded unless this is
 * disabled using the {@link Encoded} annotation. A default value can be
 * specified using the {@link DefaultValue} annotation.
 * If the request entity body is absent or is an unsupported media type, the
 * default value is used.
 *
 * The type {@code T} of the annotated parameter must either:
 * 
    *
  1. Be a primitive type
  2. *
  3. Have a constructor that accepts a single {@code String} argument
  4. *
  5. Have a static method named {@code valueOf} or {@code fromString} * that accepts a single
  6. *
  7. Have a registered implementation of {@link javax.ws.rs.ext.ParamConverterProvider} * JAX-RS extension SPI that returns a {@link javax.ws.rs.ext.ParamConverter} * instance capable of a "from string" conversion for the type.
  8. * {@code String} argument (see, for example, {@link Integer#valueOf(String)}) *
  9. Be {@code List}, {@code Set} or * {@code SortedSet}, where {@code T} satisfies 2, 3 or 4 above. * The resulting collection is read-only.
  10. *
* *

If the type is not one of the collection types listed in 5 above and the * form parameter is represented by multiple values then the first value (lexically) * of the parameter is used.

* *

Note that, whilst the annotation target permits use on fields and methods, * this annotation is only required to be supported on resource method * parameters.

* * @author Paul Sandoz * @author Marc Hadley * @see DefaultValue * @see Encoded * @since 1.0 */ @Target({ElementType.PARAMETER, ElementType.METHOD, ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface FormParam { /** * Defines the name of the form parameter whose value will be used * to initialize the value of the annotated method argument. The name is * specified in decoded form, any percent encoded literals within the value * will not be decoded and will instead be treated as literal text. E.g. if * the parameter name is "a b" then the value of the annotation is "a b", * not "a+b" or "a%20b". */ String value(); }




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