org.springframework.web.bind.annotation

Annotation Type MatrixVariable

@Target(value=PARAMETER)
 @Retention(value=RUNTIME)
 @Documented
public @interface MatrixVariable

Annotation which indicates that a method parameter should be bound to a name-value pair within a path segment. Supported for RequestMapping annotated handler methods in Servlet environments.

If the method parameter type is Map and a matrix variable name is specified, then the matrix variable value is converted to a Map assuming an appropriate conversion strategy is available.

If the method parameter is Map<String, String> or MultiValueMap<String, String> and a variable name is not specified, then the map is populated with all matrix variable names and values.

Since:

3.2

Author:

Rossen Stoyanchev, Sam Brannen

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
java.lang.String	defaultValue The default value to use as a fallback.
java.lang.String	name The name of the matrix variable.
java.lang.String	pathVar The name of the URI path variable where the matrix variable is located, if necessary for disambiguation (e.g.
boolean	required Whether the matrix variable is required.
java.lang.String	value Alias for name().

Element Detail

value

@AliasFor(attribute="name")
public abstract java.lang.String value

Alias for name().

Default:

""

name

@AliasFor(attribute="value")
public abstract java.lang.String name

The name of the matrix variable.

Since:

4.2

See Also:

value()

Default:

""

pathVar

public abstract java.lang.String pathVar

The name of the URI path variable where the matrix variable is located, if necessary for disambiguation (e.g. a matrix variable with the same name present in more than one path segment).

Default:

"\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n"

required

public abstract boolean required

Whether the matrix variable is required.

Default is true, leading to an exception being thrown in case the variable is missing in the request. Switch this to false if you prefer a null if the variable is missing.

Alternatively, provide a defaultValue(), which implicitly sets this flag to false.

Default:

true

defaultValue

public abstract java.lang.String defaultValue

The default value to use as a fallback.

Supplying a default value implicitly sets required() to false.

Default:

"\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n"