- From: Dietrich Schulten <ds@escalon.de>
- Date: Wed, 31 Dec 2014 10:55:09 +0100
- To: "public-hydra@w3.org" <public-hydra@w3.org>
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Hi,
The upcoming release 0.2.0 of hydra-java[1] is in the Sonatype
Snapshot Repo. If you want to play with it, add this to your Maven
configuration:
<repositories>
<repository>
<id>oss-sonatype</id>
<name>oss-sonatype</name>
<url>https://oss.sonatype.org/content/repositories/snapshots/</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<dependency>
<groupId>de.escalon.hypermedia</groupId>
<artifactId>hydra-spring</artifactId>
<version>0.2.0-SNAPSHOT</version>
</dependency>
I could use some feedback for the current rendering of expected
requests. The example below shows what it looks like in the current
snapshot version.
If nobody raises objections, I would release 0.2.0 during the next
days. I'll also publish a sample service to the cloud, together with
0.2.0.
The example describes how to post new events, how to post a review for
an existing event and how to update or delete an existing event.
To prescribe the review post with a nested property
reviewRating.ratingValue, I used an interim solution based on existing
vocabularies (from Issue-26 [2]) which is hopefully OK to get things
going. Once #26 and #37 is solved, this interim solution would have to
change.
I mixed in schema.org's PropertyValueSpecification for value
constraints. The code is prepared to render a choice of possible
values, too, but we have no such facility yet.
Note that the PUT and DELETE :operation property on the two Event
members might seem duplicated, but it isn't. Rather, it allows to say
that the current user is able to update/delete one event, but not the
other.
Implementers could also choose to link to single events from the
members list and make the PUT and DELETE affordances available only on
single events. So please take this lengthy response as example for
what is possible.
{
"@context":
{
"@vocab": "http://schema.org/",
"hydra": "http://www.w3.org/ns/hydra/core#"
},
"@type": "hydra:Collection",
"@id": "http://localhost:8180/webapp/hypermedia-api/events",
"hydra:operation": [
{
"hydra:method": "POST",
"hydra:expects":
{
"@type": "hydra:Class",
"hydra:subClassOf": "Event",
"hydra:supportedProperty": [
{
"@type": ["hydra:SupportedProperty",
"http://schema.org/PropertyValueSpecification"],
"hydra:property": "eventStatus"
}]
}
}],
"hydra:member": [
{
"@context":
{
"eventStatus":
{
"@type": "@vocab"
},
"EVENT_SCHEDULED": "EventScheduled"
},
"@type": "Event",
"performer": "Walk off the Earth",
"location": "Wiesbaden",
"eventStatus": "EVENT_SCHEDULED",
"workPerformed":
{
"@type": "CreativeWork",
"name": "Gang of Rhythm Tour",
"review":
{
"@id":
"http://localhost:8180/webapp/hypermedia-api/reviews/events/1",
"hydra:operation": [
{
"@type": "ReviewAction",
"hydra:method": "POST",
"hydra:expects":
{
"@type": "hydra:Class",
"hydra:subClassOf": "Review",
"hydra:supportedProperty": [
{
"@type": ["hydra:SupportedProperty",
"http://schema.org/PropertyValueSpecification"],
"hydra:property": "reviewBody"
},
{
"hydra:property": "reviewRating",
"http://schema.org/rangeIncludes":
{
"hydra:subClassOf": "Rating",
"hydra:supportedProperty": [
{
"@type": ["hydra:SupportedProperty",
"http://schema.org/PropertyValueSpecification"],
"hydra:property": "ratingValue",
"maxValue": 5,
"minValue": 1,
"stepValue": 1
}]
}
}]
}
}]
}
},
"@id": "http://localhost:8180/webapp/hypermedia-api/events/1",
"hydra:operation": [
{
"hydra:method": "PUT",
"hydra:expects":
{
"@type": "hydra:Class",
"hydra:subClassOf": "Event",
"hydra:supportedProperty": [
{
"@type": ["hydra:SupportedProperty",
"http://schema.org/PropertyValueSpecification"],
"hydra:property": "eventStatus"
}]
}
},
{
"hydra:method": "DELETE"
}]
},
{
"@context":
{
"eventStatus":
{
"@type": "@vocab"
},
"EVENT_SCHEDULED": "EventScheduled"
},
"@type": "Event",
"performer": "Cornelia Bielefeldt",
"location": "Heilbronn",
"eventStatus": "EVENT_SCHEDULED",
"workPerformed":
{
"@type": "CreativeWork",
"name": "Mein letzter Film",
"review":
{
"@id":
"http://localhost:8180/webapp/hypermedia-api/reviews/events/2",
"hydra:operation": [
{
"@type": "ReviewAction",
"hydra:method": "POST",
"hydra:expects":
{
"@type": "hydra:Class",
"hydra:subClassOf": "Review",
"hydra:supportedProperty": [
{
"@type": ["hydra:SupportedProperty",
"http://schema.org/PropertyValueSpecification"],
"hydra:property": "reviewBody"
},
{
"hydra:property": "reviewRating",
"http://schema.org/rangeIncludes":
{
"hydra:subClassOf": "Rating",
"hydra:supportedProperty": [
{
"@type": ["hydra:SupportedProperty",
"http://schema.org/PropertyValueSpecification"],
"hydra:property": "ratingValue",
"maxValue": 5,
"minValue": 1,
"stepValue": 1
}]
}
}]
}
}]
}
},
"@id": "http://localhost:8180/webapp/hypermedia-api/events/2",
"hydra:operation": [
{
"hydra:method": "PUT",
"hydra:expects":
{
"@type": "hydra:Class",
"hydra:subClassOf": "Event",
"hydra:supportedProperty": [
{
"@type": ["hydra:SupportedProperty",
"http://schema.org/PropertyValueSpecification"],
"hydra:property": "eventStatus"
}]
}
},
{
"hydra:method": "DELETE"
}]
}]
}
Best regards,
Dietrich
[1] https://github.com/dschulten/hydra-java
[2] https://github.com/HydraCG/Specifications/issues/26
- --
Dietrich Schulten
Escalon System-Entwicklung
Bubenhalde 10
74199 Untergruppenbach
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Received on Wednesday, 31 December 2014 09:55:41 UTC