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/*
* 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.
*/
package org.apache.tinkerpop.gremlin.language.grammar;
import org.apache.tinkerpop.gremlin.structure.Column;
import org.apache.tinkerpop.gremlin.structure.T;
import java.util.function.Function;
/**
* Traversal Function parser parses Function enums.
*/
public class TraversalFunctionVisitor extends DefaultGremlinBaseVisitor<Function> {
private TraversalFunctionVisitor() {}
private static TraversalFunctionVisitor instance;
public static TraversalFunctionVisitor instance() {
if (instance == null) {
instance = new TraversalFunctionVisitor();
}
return instance;
}
/**
* {@inheritDoc}
*/
@Override
public Function visitTraversalFunction(final GremlinParser.TraversalFunctionContext ctx) {
return this.visitChildren(ctx);
}
/**
* {@inheritDoc}
*/
@Override
public Function visitTraversalToken(final GremlinParser.TraversalTokenContext ctx) {
return TraversalEnumParser.parseTraversalEnumFromContext(T.class, ctx);
}
/**
* {@inheritDoc}
*/
@Override
public Function visitTraversalColumn(final GremlinParser.TraversalColumnContext ctx) {
return TraversalEnumParser.parseTraversalEnumFromContext(Column.class, ctx);
}
}