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neo4j export: escape \ #263

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Oct 17, 2024
Merged

neo4j export: escape \ #263

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12 changes: 9 additions & 3 deletions formats/src/main/scala/flatgraph/formats/neo4jcsv/Neo4jCsvExporter.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -2,15 +2,16 @@ package flatgraph.formats.neo4jcsv

import com.github.tototoshi.csv.*
import flatgraph.formats.{ExportResult, Exporter, writeFile}
import flatgraph.{Edge, GNode, Graph, Schema}
import flatgraph.{Edge, GNode, Schema}

import java.nio.file.Path
import java.util.regex.Pattern
import scala.collection.mutable
import scala.jdk.CollectionConverters.*
import scala.jdk.OptionConverters.RichOptional
import scala.util.Using

object Neo4jCsvExporter extends Exporter {
val BackslashRegex = Pattern.compile("""\\""") // matches `\`

override def defaultFileExtension = "csv"

Expand Down Expand Up @@ -74,7 +75,7 @@ object Neo4jCsvExporter extends Exporter {
}

val specialColumns = Seq(node.id.toString, node.label)
val propertyValueColumns = columnDefinitions.propertyValues(node.propertyOption)
val propertyValueColumns = columnDefinitions.propertyValues(node.propertyOption).map(escapeSpecialCharacters)
writer.writeRow(specialColumns ++ propertyValueColumns)
nodeCount += 1
}
Expand Down Expand Up @@ -162,6 +163,11 @@ object Neo4jCsvExporter extends Exporter {
}
}

private def escapeSpecialCharacters(propertyValue: String): String = {
// replace `\` with `\\` - otherwise neo4j import complains
BackslashRegex.matcher(propertyValue).replaceAll("""\\\\""")
}

private case class EdgeFilesContext(
label: String,
headerFile: Path,
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