Jim,
The best I can do as far as a failing test is this series of curl
calls. I create 2 nodes, then connect them with a relationship that
has a property called "distance". When I ask for paths without
specifying the algorithm, I get back the path with the relationship.
When I specify the algorithm as "dijkstra" with a cost property of
"distance", I get back a 400 Bad Request with a stack trace.
Now interestingly, if I create the relationship with a distance of
2.0, it works. Unfortunately, PHP's json_encode method turns a double
2.0 into an integer 2.
My original thought was to make the DoubleEvaluator class cast the
Integer cost property value to a basic double before wrapping it in a
Double object.
Here is the series of commands:
===== SHELL
$ curl -i -HAccept:application/json -HContent-Type:application/json -X
POST -d '{"name":"A"}' http://localhost:7474/db/data/node
HTTP/1.1 201 Created
Content-Length: 996
Location: http://localhost:7474/db/data/node/73
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"outgoing_relationships" :
"http://localhost:7474/db/data/node/73/relationships/out";,
"data" : {
"name" : "A"
},
"traverse" : "http://localhost:7474/db/data/node/73/traverse/{returnType}";,
"all_typed_relationships" :
"http://localhost:7474/db/data/node/73/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/73/properties/{key}";,
"self" : "http://localhost:7474/db/data/node/73";,
"properties" : "http://localhost:7474/db/data/node/73/properties";,
"outgoing_typed_relationships" :
"http://localhost:7474/db/data/node/73/relationships/out/{-list|&|types}",
"incoming_relationships" :
"http://localhost:7474/db/data/node/73/relationships/in";,
"extensions" : {
},
"create_relationship" : "http://localhost:7474/db/data/node/73/relationships";,
"all_relationships" :
"http://localhost:7474/db/data/node/73/relationships/all";,
"incoming_typed_relationships" :
"http://localhost:7474/db/data/node/73/relationships/in/{-list|&|types}"
}
$ curl -i -HAccept:application/json -HContent-Type:application/json -X
POST -d '{"name":"B"}' http://localhost:7474/db/data/node
HTTP/1.1 201 Created
Content-Length: 996
Location: http://localhost:7474/db/data/node/74
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"outgoing_relationships" :
"http://localhost:7474/db/data/node/74/relationships/out";,
"data" : {
"name" : "B"
},
"traverse" : "http://localhost:7474/db/data/node/74/traverse/{returnType}";,
"all_typed_relationships" :
"http://localhost:7474/db/data/node/74/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/74/properties/{key}";,
"self" : "http://localhost:7474/db/data/node/74";,
"properties" : "http://localhost:7474/db/data/node/74/properties";,
"outgoing_typed_relationships" :
"http://localhost:7474/db/data/node/74/relationships/out/{-list|&|types}",
"incoming_relationships" :
"http://localhost:7474/db/data/node/74/relationships/in";,
"extensions" : {
},
"create_relationship" : "http://localhost:7474/db/data/node/74/relationships";,
"all_relationships" :
"http://localhost:7474/db/data/node/74/relationships/all";,
"incoming_typed_relationships" :
"http://localhost:7474/db/data/node/74/relationships/in/{-list|&|types}"
}
$ curl -i -HAccept:application/json -HContent-Type:application/json -X
POST -d
'{"to":"http://localhost:7474/db/data/node/74","type":"GO","data":{"name":"AB","distance":2}}'
http://localhost:7474/db/data/node/73/relationships
HTTP/1.1 201 Created
Content-Length: 421
Location: http://localhost:7474/db/data/relationship/64
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"start" : "http://localhost:7474/db/data/node/73";,
"data" : {
"distance" : 2,
"name" : "AB"
},
"self" : "http://localhost:7474/db/data/relationship/64";,
"property" : "http://localhost:7474/db/data/relationship/64/properties/{key}";,
"properties" : "http://localhost:7474/db/data/relationship/64/properties";,
"type" : "GO",
"extensions" : {
},
"end" : "http://localhost:7474/db/data/node/74";
}
##### This succeeds
$ curl -i -HAccept:application/json -HContent-Type:application/json -X
POST -d '{"to":"http://localhost:7474/db/data/node/74","type":"GO"}'
http://localhost:7474/db/data/node/73/paths
HTTP/1.1 200 OK
Content-Length: 297
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
[ {
"start" : "http://localhost:7474/db/data/node/73";,
"nodes" : [ "http://localhost:7474/db/data/node/73";,
"http://localhost:7474/db/data/node/74"; ],
"length" : 1,
"relationships" : [ "http://localhost:7474/db/data/relationship/64"; ],
"end" : "http://localhost:7474/db/data/node/74";
} ]
##### This fails
$ curl -i -HAccept:application/json -HContent-Type:application/json -X
POST -d
'{"to":"http://localhost:7474/db/data/node/74","type":"GO","algorithm":"dijkstra","cost
property":"distance"}' http://localhost:7474/db/data/node/73/paths
HTTP/1.1 400 Bad Request
Content-Length: 4579
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"message" : "java.lang.Integer cannot be cast to java.lang.Double",
"exception" : "java.lang.ClassCastException: java.lang.Integer
cannot be cast to java.lang.Double",
"stacktrace" : [
"org.neo4j.graphalgo.impl.util.DoubleEvaluator.getCost(DoubleEvaluator.java:38)",
"org.neo4j.graphalgo.impl.util.DoubleEvaluator.getCost(DoubleEvaluator.java:26)",
"org.neo4j.graphalgo.impl.path.Dijkstra$SelectorFactory.calculateValue(Dijkstra.java:100)",
"org.neo4j.graphalgo.impl.path.Dijkstra$SelectorFactory.calculateValue(Dijkstra.java:88)",
"org.neo4j.graphalgo.impl.util.BestFirstSelectorFactory$BestFirstSelector.next(BestFirstSelectorFactory.java:66)",
"org.neo4j.kernel.impl.traversal.TraverserImpl$TraverserIterator.fetchNextOrNull(TraverserImpl.java:127)",
"org.neo4j.kernel.impl.traversal.TraverserImpl$TraverserIterator.fetchNextOrNull(TraverserImpl.java:94)",
"org.neo4j.helpers.collection.PrefetchingIterator.hasNext(PrefetchingIterator.java:55)",
"org.neo4j.graphalgo.impl.util.StopAfterWeightIterator.fetchNextOrNull(StopAfterWeightIterator.java:45)",
"org.neo4j.graphalgo.impl.util.StopAfterWeightIterator.fetchNextOrNull(StopAfterWeightIterator.java:29)",
"org.neo4j.helpers.collection.PrefetchingIterator.hasNext(PrefetchingIterator.java:55)",
"org.neo4j.helpers.collection.IteratorWrapper.hasNext(IteratorWrapper.java:42)",
"org.neo4j.server.rest.repr.ListRepresentation.serialize(ListRepresentation.java:58)",
"org.neo4j.server.rest.repr.ListRepresentation.serialize(ListRepresentation.java:51)",
"org.neo4j.server.rest.repr.OutputFormat.format(OutputFormat.java:118)",
"org.neo4j.server.rest.repr.OutputFormat.response(OutputFormat.java:95)",
"org.neo4j.server.rest.repr.OutputFormat.ok(OutputFormat.java:48)",
"org.neo4j.server.rest.web.RestfulGraphDatabase.allPaths(RestfulGraphDatabase.java:987)",
"sun.reflect.GeneratedMethodAccessor153.invoke(Unknown Source)",
"sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)",
"java.lang.reflect.Method.invoke(Method.java:597)",
"com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:184)",
"com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:67)",
"com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:276)",
"com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:133)",
"com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:83)",
"com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:133)",
"com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:71)",
"com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1171)",
"com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1103)",
"com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1053)",
"com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1043)",
"com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:406)",
"com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:477)",
"com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:662)",
"javax.servlet.http.HttpServlet.service(HttpServlet.java:820)",
"org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)",
"org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)",
"org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)",
"org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)",
"org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)",
"org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)",
"org.mortbay.jetty.Server.handle(Server.java:326)",
"org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)",
"org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:943)",
"org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)",
"org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)",
"org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)",
"org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)",
"org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)"
]
}
===== END SHELL
Thanks for any help you can provide.
-- Josh
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