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InputRelationshipDeserialization.java
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InputRelationshipDeserialization.java
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/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.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 <http://www.gnu.org/licenses/>.
*/
package org.neo4j.unsafe.impl.batchimport.input.csv;
import org.neo4j.csv.reader.SourceTraceability;
import org.neo4j.unsafe.impl.batchimport.input.Group;
import org.neo4j.unsafe.impl.batchimport.input.Groups;
import org.neo4j.unsafe.impl.batchimport.input.InputRelationship;
import org.neo4j.unsafe.impl.batchimport.input.csv.Header.Entry;
/**
* Builds {@link InputRelationship} from CSV data.
*/
public class InputRelationshipDeserialization extends InputEntityDeserialization<InputRelationship>
{
private final Header header;
private final Groups groups;
private Group startNodeGroup;
private Group endNodeGroup;
private String type;
private Object startNode;
private Object endNode;
public InputRelationshipDeserialization( Header header, SourceTraceability source, Groups groups )
{
super( source );
this.header = header;
this.groups = groups;
}
@Override
public void initialize()
{
this.startNodeGroup = groups.get( header.entry( Type.START_ID ).groupName() );
this.endNodeGroup = groups.get( header.entry( Type.END_ID ).groupName() );
}
@Override
public void handle( Entry entry, Object value )
{
switch ( entry.type() )
{
case TYPE:
type = (String) value;
break;
case START_ID:
startNode = value;
break;
case END_ID:
endNode = value;
break;
default:
super.handle( entry, value );
break;
}
}
@Override
public InputRelationship materialize()
{
return new InputRelationship(
source.sourceDescription(), source.lineNumber(), source.position(),
properties(), null, startNodeGroup, startNode, endNodeGroup, endNode, type, null );
}
@Override
public void clear()
{
super.clear();
type = null;
startNode = endNode = null;
}
}