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BUILD INSTRUCTIONS

Requirements:

  • JDK8
  • gradle 2.2.1

HOW TO USE

There are three optional ENV variables to set up

  • WIGGLE_PROJECT_NAME: name of the project to index (default: NO_NAME]
  • WIGGLE_DB_PATH: path where to locate neo4j database (default: ./neo4j/data/wiggle.db)
  • WIGGLE_CLEAR_DB [y/n]: erase existing database before indexing (default: n)
$ gradle build
$ gradle copyDeps
$ javac -cp build/libs/WiggleIndexer.jar:"build/libs/*" -Xplugin:WiggleIndexerPlugin samples/Test.java

Generated jar is available at ./WiggleIndexer/build/libs

By default the generated database is located under ./neo4j/data/wiggle.db. You can then select the full path using the Neo4j frontend to access the database.

EXAMPLE QUERIES

Example queries:

  1. Wildcards

    START n=node:node_auto_index(nodeType='JCWildcard') MATCH p-[:ENCLOSES]->c-[*]->n WHERE has(p.nodeType) AND p.nodeType='JCCompilationUnit' AND has(c.nodeType) AND c.nodeType='JCClassDecl' RETURN n.typeBoundKind, p.fileName, p.projectName, n.lineNumber, c.name LIMIT 10;

  2. countDistinctMethod

    START n=node:node_auto_index(nodeType ='JCMethodDecl') MATCH p-[*]->c-[:DECLARES]->n WHERE NOT(n.name = '') AND has(c.nodeType) AND c.nodeType='JCClassDecl' AND c.name <> "" AND has(p.nodeType) AND p.nodeType='JCCompilationUnit' WITH n.name +"[sep]"+ c.name + "[sep]"+ p.fileName as method RETURN COUNT(method) as total

  3. countOverloaded

    START n=node:node_auto_index(nodeType ='JCMethodDecl') MATCH p-[]->c-[:DECLARES]->n WHERE NOT(n.name = '') AND has(c.nodeType) AND c.nodeType='JCClassDecl' AND c.name <> "" AND has(p.nodeType) AND p.nodeType='JCCompilationUnit' WITH n.name +"[sep]"+ c.name + "[sep]"+ p.fileName as method, count() as overloadedCount WHERE overloadedCount > 1 RETURN SUM(overloadedCount) as total;

  4. fetchOverloaded

    START n=node:node_auto_index(nodeType ='JCMethodDecl') MATCH p-[]->c-[:DECLARES]->n WHERE NOT(n.name = '') AND has(c.nodeType) AND c.nodeType='JCClassDecl' AND c.name <> "" AND has(p.nodeType) AND p.nodeType='JCCompilationUnit' WITH n.name +"[sep]"+ c.name + "[sep]"+ p.fileName as method, count() as overloadedCount WHERE overloadedCount > 1 RETURN method, overloadedCount ORDER BY overloadedCount desc LIMIT 10;

  5. covariant assignments

    start n=node:node_auto_index(nodeType='JCAssign') match n-[:LHS]->lhsNode-[relLeft:TYPE]->lhsType, n-[:RHS]->rhsNode-[relRight:TYPE]->rhsType, u-[]->c-[]->temp-[:ENCLOSES]->n WHERE(has(u.nodeType) AND u.nodeType='JCCompilationUnit' AND has(c.nodeType) AND c.nodeType='JCClassDecl' AND has(relLeft.typeKind) AND relLeft.typeKind='ArrayType' AND has(relRight.typeKind) AND relRight.typeKind='ArrayType' AND lhsType.actualType <> rhsType.actualType) return distinct u.projectName, u.fileName, c.name, rhsNode.lineNumber, lhsType.actualType, rhsType.actualType LIMIT 10;