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| // Gremlin user-defined defined tree steps | |
| // inTree() and outTree() | |
| // by James Thornton, http://jamesthornton.com | |
| // added ability to sort subtrees | |
| // see https://groups.google.com/d/topic/gremlin-users/iCPUifiU_wk/discussion | |
| // closure can't have the same name as the defined step | |
| tree = { vertices -> | |
| def results = [] | |
| vertices.each() { | |
| results << it | |
| unordered = label == null ? it."$direction"() : it."$direction"(label); | |
| ordered = order == null ? unordered : unordered.order(order) | |
| children = ordered.toList() | |
| if (children) { | |
| child_tree = tree(children) | |
| results << child_tree | |
| } | |
| } | |
| results | |
| } | |
| extractParams = {final Object... params -> | |
| label = null; | |
| order = null; | |
| switch (params.size()) { | |
| case 1: | |
| if (params[0] instanceof String) { | |
| label = params[0]; | |
| } | |
| else { | |
| order = params[0]; | |
| } | |
| break; | |
| case 2: | |
| label = params[0]; | |
| order = params[1]; | |
| break; | |
| } | |
| } | |
| inClosure = {final Object... params -> | |
| extractParams(params) | |
| results = [] | |
| direction = "in" | |
| _().transform{ tree(it) } | |
| } | |
| outClosure = {final Object... params -> | |
| extractParams(params) | |
| results = [] | |
| direction = "out" | |
| _().transform{ tree(it) } | |
| } | |
| Gremlin.defineStep("inTree", [Vertex,Pipe], inClosure) | |
| Gremlin.defineStep("outTree", [Vertex,Pipe], outClosure) |
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