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Neo4j kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see http://neo4j.org.

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.kernel.impl.api.parallel;

import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.kernel.api.ExecutionContext;
import org.neo4j.kernel.impl.util.BaseCoreAPIPath;
import org.neo4j.kernel.impl.util.NodeEntityWrappingNodeValue;
import org.neo4j.kernel.impl.util.PathWrappingPathValue;
import org.neo4j.kernel.impl.util.RelationshipEntityWrappingValue;
import org.neo4j.values.ValueMapper;
import org.neo4j.values.virtual.VirtualNodeValue;
import org.neo4j.values.virtual.VirtualPathValue;
import org.neo4j.values.virtual.VirtualRelationshipValue;

public class ExecutionContextValueMapper extends ValueMapper.JavaMapper {

    private final ExecutionContext executionContext;

    public ExecutionContextValueMapper(ExecutionContext executionContext) {
        this.executionContext = executionContext;
    }

    @Override
    public Object mapPath(VirtualPathValue value) {
        if (value instanceof PathWrappingPathValue wrapper) {
            return wrapper.path();
        }
        return new ExecutionContextPath(value);
    }

    @Override
    public Object mapNode(VirtualNodeValue value) {
        if (value instanceof NodeEntityWrappingNodeValue wrapper) {
            return wrapper.getEntity();
        }

        return new ExecutionContextNode(value.id(), executionContext);
    }

    @Override
    public Object mapRelationship(VirtualRelationshipValue value) {
        if (value instanceof RelationshipEntityWrappingValue wrapper) {
            return wrapper.getEntity();
        }
        return new ExecutionContextRelationship(value.id(), executionContext);
    }

    public class ExecutionContextPath extends BaseCoreAPIPath {

        private ExecutionContextPath(VirtualPathValue value) {
            super(value);
        }

        @Override
        protected Node mapNode(long value) {
            return new ExecutionContextNode(value, executionContext);
        }

        @Override
        protected Relationship mapRelationship(long value) {
            return new ExecutionContextRelationship(value, executionContext);
        }
    }
}