ImmutableNegotiationResult.java 文件源码

ImmutableNegotiationResult(final ImmutableVariant variant, ImmutableQuality quality, final ImmutableVariant errorVariant, ImmutableAlternatives alternatives) {
    checkArgument(
        (variant==null && quality==null) ||
        (variant!=null && quality!=null),
        "Variant and quality must be simultaneously defined or not (%s <--> %s)",variant,quality);
    checkNotNull(errorVariant,"Error variant cannot be null");
    checkNotNull(alternatives,"Alternatives cannot be null");
    this.variant=variant;
    this.quality=quality;
    this.errorVariant=errorVariant;
    this.alternatives=alternatives;
    Builder<MediaType> mtBuilder=ImmutableSet.<MediaType>builder();
    Builder<CharacterEncoding> ceBuilder=ImmutableSet.<CharacterEncoding>builder();
    Builder<Language> lBuilder=ImmutableSet.<Language>builder();
    for(Alternative alternative:alternatives) {
        addEntityIfPresent(mtBuilder,alternative.type());
        addEntityIfPresent(ceBuilder,alternative.charset());
        addEntityIfPresent(lBuilder,alternative.language());
    }
    this.mediaTypes=mtBuilder.build();
    this.characterEncodings=ceBuilder.build();
    this.languages=lBuilder.build();
}