| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import org.apache.tinkerpop.gremlin.structure.util.empty.EmptyGraph |
| import org.apache.tinkerpop.gremlin.process.traversal.translator.PythonTranslator |
| import org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine |
| import org.apache.tinkerpop.gremlin.groovy.jsr223.ast.AmbiguousMethodASTTransformation |
| import org.apache.tinkerpop.gremlin.groovy.jsr223.ast.VarAsBindingASTTransformation |
| import org.apache.tinkerpop.gremlin.groovy.jsr223.ast.RepeatASTTransformationCustomizer |
| import org.apache.tinkerpop.gremlin.groovy.jsr223.GroovyCustomizer |
| import org.codehaus.groovy.control.customizers.CompilationCustomizer |
| import org.apache.tinkerpop.gremlin.language.corpus.FeatureReader |
| |
| import javax.script.SimpleBindings |
| import java.nio.file.Paths |
| |
| import static org.apache.tinkerpop.gremlin.process.traversal.AnonymousTraversalSource.traversal |
| |
| // getting an exception like: |
| // > InvocationTargetException: javax.script.ScriptException: groovy.lang.MissingMethodException: No signature of |
| // > method: org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.DefaultGraphTraversal.mergeE() is applicable for |
| // > argument types: (String) values: [4ffdea36-4a0e-4681-acba-e76875d1b25b] |
| // usually means bindings are not being extracted properly by VarAsBindingASTTransformation which typically happens |
| // when a step is taking an argument that cannot properly resolve to the type required by the step itself. there are |
| // special cases in that VarAsBindingASTTransformation class which might need to be adjusted. Editing the |
| // GremlinGroovyScriptEngineTest#shouldProduceBindingsForVars() with the failing step and argument can typically make |
| // this issue relatively easy to debug and enforce. |
| // |
| // getting an exception like: |
| // > Ambiguous method overloading for method org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource#mergeV. |
| // likely requires changes to the AmbiguousMethodASTTransformation which forces a call to a particular method overload |
| // and usually relates to use of null where the type isn't clear |
| |
| // file is overwritten on each generation |
| radishGremlinFile = new File("${projectBaseDir}/gremlin-python/src/main/python/radish/gremlin.py") |
| |
| // assumes globally unique scenario names for keys with list of Gremlin traversals as they appear |
| gremlins = FeatureReader.parseGrouped(Paths.get("${projectBaseDir}", "gremlin-test", "src", "main", "resources", "org", "apache", "tinkerpop", "gremlin", "test", "features").toString()) |
| |
| gremlinGroovyScriptEngine = new GremlinGroovyScriptEngine( |
| (GroovyCustomizer) { -> new RepeatASTTransformationCustomizer(new AmbiguousMethodASTTransformation()) }, |
| (GroovyCustomizer) { -> new RepeatASTTransformationCustomizer(new VarAsBindingASTTransformation()) } |
| ) |
| |
| translator = PythonTranslator.of('g') |
| g = traversal().withEmbedded(EmptyGraph.instance()) |
| bindings = new SimpleBindings() |
| bindings.put('g', g) |
| |
| radishGremlinFile.withWriter('UTF-8') { Writer writer -> |
| writer.writeLine('#\n' + |
| '# Licensed to the Apache Software Foundation (ASF) under one\n' + |
| '# or more contributor license agreements. See the NOTICE file\n' + |
| '# distributed with this work for additional information\n' + |
| '# regarding copyright ownership. The ASF licenses this file\n' + |
| '# to you under the Apache License, Version 2.0 (the\n' + |
| '# "License"); you may not use this file except in compliance\n' + |
| '# with the License. You may obtain a copy of the License at\n' + |
| '# \n' + |
| '# http://www.apache.org/licenses/LICENSE-2.0\n' + |
| '# \n' + |
| '# Unless required by applicable law or agreed to in writing,\n' + |
| '# software distributed under the License is distributed on an\n' + |
| '# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\n' + |
| '# KIND, either express or implied. See the License for the\n' + |
| '# specific language governing permissions and limitations\n' + |
| '# under the License.\n' + |
| '#\n') |
| |
| writer.writeLine("\n\n#######################################################################################") |
| writer.writeLine("## Do NOT edit this file directly - generated by build/generate.groovy") |
| writer.writeLine("#######################################################################################\n\n") |
| |
| writer.writeLine( |
| 'from radish import world\n' + |
| 'import datetime\n' + |
| 'from gremlin_python.statics import long, GremlinType\n' + |
| 'from gremlin_python.process.anonymous_traversal import traversal\n' + |
| 'from gremlin_python.process.traversal import TraversalStrategy\n' + |
| 'from gremlin_python.process.graph_traversal import __\n' + |
| 'from gremlin_python.structure.graph import Graph\n' + |
| 'from gremlin_python.process.traversal import Barrier, Cardinality, CardinalityValue, P, TextP, Pop, Scope, Column, Order, Direction, DT, Merge, T, Pick, Operator, IO, WithOptions\n') |
| |
| // Groovy can't process certain null oriented calls because it gets confused with the right overload to call |
| // at runtime. using this approach for now as these are the only such situations encountered so far. a better |
| // solution may become necessary as testing of nulls expands. |
| def staticTranslate = [:] |
| // SAMPLE: g_injectXnull_nullX: " 'g_injectXnull_nullX': [(lambda g: g.inject(None,None))], ", |
| |
| writer.writeLine('world.gremlins = {') |
| gremlins.each { k,v -> |
| if (staticTranslate.containsKey(k)) { |
| writer.writeLine(staticTranslate[k]) |
| } else { |
| writer.write(" '") |
| writer.write(k) |
| writer.write("': [") |
| def collected = v.collect { |
| def t = gremlinGroovyScriptEngine.eval(it, bindings) |
| [t, t.bytecode.bindings.keySet()] |
| } |
| def uniqueBindings = collected.collect { it[1] }.flatten().unique() |
| def gremlinItty = collected.iterator() |
| while (gremlinItty.hasNext()) { |
| def t = gremlinItty.next()[0] |
| writer.write("(lambda g") |
| if (!uniqueBindings.isEmpty()) { |
| writer.write(", ") |
| writer.write(uniqueBindings.join("=None,")) |
| writer.write("=None") |
| } |
| writer.write(":") |
| writer.write(translator.translate(t.bytecode).script) |
| writer.write(")") |
| if (gremlinItty.hasNext()) writer.write(', ') |
| } |
| writer.writeLine('], ') |
| } |
| } |
| writer.writeLine('}') |
| } |
| |
| |
