Package org.apache.tinkerpop.gremlin.process.traversal.util

Class BytecodeHelper

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.util.BytecodeHelper

public final class BytecodeHelper
extends Object

Utility class for parsing Bytecode.

Author:

Marko A. Rodriguez (http://markorodriguez.com), Stephen Mallette (http://stephen.genoprime.com)

Method Summary

Modifier and Type	Method	Description
static void	detachElements(Bytecode bytecode)
static Bytecode	filterInstructions(Bytecode bytecode, Predicate<Bytecode.Instruction> predicate)
static List<Class<? extends Step>>	findPossibleTraversalSteps(String operator)	Returns a list of Step which can be added to the traversal for the provided operator.
static <A extends TraversalStrategy> Iterator<A>	findStrategies(Bytecode bytecode, Class<A> clazz)	Parses Bytecode to find TraversalStrategy objects added in the source instructions.
static Optional<String>	getLambdaLanguage(Bytecode bytecode)
static boolean	isGraphOperation(Bytecode bytecode)	Checks if the bytecode is one of the standard GraphOp options.
static void	removeBindings(Bytecode bytecode)
static boolean	removeStrategies(Bytecode bytecode, String operator, Class<TraversalStrategy>[] clazzes)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

findStrategies

public static <A extends TraversalStrategy> Iterator<A> findStrategies(Bytecode bytecode,
                                                                       Class<A> clazz)

Parses Bytecode to find TraversalStrategy objects added in the source instructions.

removeStrategies

public static boolean removeStrategies(Bytecode bytecode,
                                       String operator,
                                       Class<TraversalStrategy>[] clazzes)

filterInstructions

public static Bytecode filterInstructions(Bytecode bytecode,
                                          Predicate<Bytecode.Instruction> predicate)

isGraphOperation

public static boolean isGraphOperation(Bytecode bytecode)

Checks if the bytecode is one of the standard GraphOp options.

getLambdaLanguage

public static Optional<String> getLambdaLanguage(Bytecode bytecode)

removeBindings

public static void removeBindings(Bytecode bytecode)

detachElements

public static void detachElements(Bytecode bytecode)

findPossibleTraversalSteps

public static List<Class<? extends Step>> findPossibleTraversalSteps(String operator)

Returns a list of Step which can be added to the traversal for the provided operator.

Graph Traversal may or may not add the returned list of steps into the traversal. List only represents possible steps added to traversal given an operator.

Parameters:

operator - Graph operator

Returns:

List of possible Step(s)