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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://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.server.http.cypher;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Path;
import org.neo4j.graphdb.Relationship;
import org.neo4j.kernel.impl.util.DefaultValueMapper;
import org.neo4j.server.http.cypher.entity.HttpNode;
import org.neo4j.server.http.cypher.entity.HttpPath;
import org.neo4j.server.http.cypher.entity.HttpRelationship;
import org.neo4j.values.SequenceValue;
import org.neo4j.values.virtual.MapValue;
import org.neo4j.values.virtual.NodeValue;
import org.neo4j.values.virtual.RelationshipValue;
import org.neo4j.values.virtual.VirtualNodeValue;
import org.neo4j.values.virtual.VirtualPathValue;
import org.neo4j.values.virtual.VirtualRelationshipValue;

public class TransactionIndependentValueMapper extends DefaultValueMapper
{
    private final CachingWriter cachingWriter;

    public TransactionIndependentValueMapper( CachingWriter cachingWriter )
    {
        // transaction not needed
        super( null );
        this.cachingWriter = cachingWriter;
    }

    @Override
    public Object mapMap( MapValue value )
    {
        Map map = new HashMap<>();
        value.foreach( ( k, v ) ->
                       {
                           if ( v instanceof NodeValue || v instanceof RelationshipValue )
                           {
                               try
                               {
                                   v.writeTo( cachingWriter );
                               }
                               catch ( IOException e )
                               {
                                   throw new RuntimeException( e );
                               }
                               map.put( k, cachingWriter.getCachedObject() );
                           }
                           else
                           {
                               map.put( k, v.map( this ) );
                           }
                       } );
        return map;
    }

    @Override
    public List mapSequence( SequenceValue value )
    {
        List list = new ArrayList<>( value.length() );
        value.forEach( v ->
                       {
                           if ( v instanceof NodeValue || v instanceof RelationshipValue )
                           {
                               try
                               {
                                   v.writeTo( cachingWriter );
                               }
                               catch ( IOException e )
                               {
                                   throw new RuntimeException( e );
                               }
                               list.add( cachingWriter.getCachedObject() );
                           }
                           else
                           {
                               list.add( v.map( this ) );
                           }
                       } );
        return list;
    }

    @Override
    public Node mapNode( VirtualNodeValue value )
    {
        try
        {
            value.writeTo( cachingWriter );
        }
        catch ( IOException e )
        {
            throw new RuntimeException( e );
        }
        return (HttpNode) cachingWriter.getCachedObject();
    }

    @Override
    public Relationship mapRelationship( VirtualRelationshipValue value )
    {
        try
        {
            value.writeTo( cachingWriter );
        }
        catch ( IOException ex )
        {
            throw new RuntimeException( ex );
        }
        return (HttpRelationship) cachingWriter.getCachedObject();
    }

    @Override
    public Path mapPath( VirtualPathValue value )
    {
        try
        {
            value.writeTo( cachingWriter );
        }
        catch ( IOException ex )
        {
            throw new RuntimeException( ex );
        }
        return (HttpPath) cachingWriter.getCachedObject();
    }
}
    

    

    

            

    

            



    
    






    
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