## javax.ws.rs.core
Class Variant.VariantListBuilder

    java.lang.Object
      javax.ws.rs.core.Variant.VariantListBuilder

Direct Known Subclasses:
  VariantListBuilderImpl

Enclosing class:
  Variant

    public abstract static class Variant.VariantListBuilder

extends java.lang.Object

A builder for a list of representation variants.

Constructor Summary
`protected` | `Variant.VariantListBuilder()` Protected constructor, use the static `newInstance` method to obtain an instance.

Method Summary
`abstract Variant.VariantListBuilder` | `add()` Add the current combination of metadata to the list of supported variants, after this method is called the current combination of metadata is emptied.
`abstract java.util.List<Variant>` | `build()` Build a list of representation variants from the current state of the builder.
`abstract Variant.VariantListBuilder` | `encodings(java.lang.String... encodings)` Set the encoding[s] for this variant.
`abstract Variant.VariantListBuilder` | `languages(java.util.Locale... languages)` Set the language[s] for this variant.
`abstract Variant.VariantListBuilder` | `mediaTypes(MediaType... mediaTypes)` Set the media type[s] for this variant.
`static Variant.VariantListBuilder` | `newInstance()` Create a new builder instance.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Variant.VariantListBuilder

    protected Variant.VariantListBuilder()

  Protected constructor, use the static `newInstance` method to obtain an instance.

Method Detail

### newInstance

    public static Variant.VariantListBuilder newInstance()

  Create a new builder instance.

  Returns:
    a new Builder

### build

    public abstract java.util.List<Variant> build()

  Build a list of representation variants from the current state of the builder. After this method is called the builder is reset to an empty state.

  Returns:
    a list of representation variants

### add

    public abstract Variant.VariantListBuilder add()

  Add the current combination of metadata to the list of supported variants, after this method is called the current combination of metadata is emptied. If more than one value is supplied for one or more of the variant properties then a variant will be generated for each possible combination. E.g. in the following `list` would have four members:

      List<Variant> list = VariantListBuilder.newInstance().languages("en","fr")
         .encodings("zip", "identity").add().build()

  Returns:
    the updated builder
  Throws:
    `java.lang.IllegalStateException` - if there is not at least one mediaType, language or encoding set for the current variant.

### languages

    public abstract Variant.VariantListBuilder languages(java.util.Locale... languages)

  Set the language[s] for this variant.

  Parameters:
    `languages` - the available languages
  Returns:
    the updated builder

### encodings

    public abstract Variant.VariantListBuilder encodings(java.lang.String... encodings)

  Set the encoding[s] for this variant.

  Parameters:
    `encodings` - the available encodings
  Returns:
    the updated builder

### mediaTypes

    public abstract Variant.VariantListBuilder mediaTypes(MediaType... mediaTypes)

  Set the media type[s] for this variant.

  Parameters:
    `mediaTypes` - the available mediaTypes. If specific charsets are supported they should be included as parameters of the respective media type.
  Returns:
    the updated builder

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