diff options
Diffstat (limited to 'opendc-trace/opendc-trace-api/src')
3 files changed, 10 insertions, 4 deletions
diff --git a/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/Table.kt b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/Table.kt index b0181cbc..05d0234a 100644 --- a/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/Table.kt +++ b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/Table.kt @@ -42,9 +42,11 @@ public interface Table { public val partitionKeys: List<TableColumn<*>> /** - * Open a [TableReader] for this table. + * Open a [TableReader] for a projection of this table. + * + * @param projection The list of columns to fetch from the table or `null` if no projection is performed. */ - public fun newReader(): TableReader + public fun newReader(projection: List<TableColumn<*>>? = null): TableReader /** * Open a [TableWriter] for this table. diff --git a/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/internal/TableImpl.kt b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/internal/TableImpl.kt index 24551edb..b848e19a 100644 --- a/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/internal/TableImpl.kt +++ b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/internal/TableImpl.kt @@ -43,7 +43,9 @@ internal class TableImpl(val trace: TraceImpl, override val name: String) : Tabl override val partitionKeys: List<TableColumn<*>> get() = details.partitionKeys - override fun newReader(): TableReader = trace.format.newReader(trace.path, name) + override fun newReader(projection: List<TableColumn<*>>?): TableReader { + return trace.format.newReader(trace.path, name, projection) + } override fun newWriter(): TableWriter = trace.format.newWriter(trace.path, name) diff --git a/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/spi/TraceFormat.kt b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/spi/TraceFormat.kt index f2e610db..47761e0f 100644 --- a/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/spi/TraceFormat.kt +++ b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/spi/TraceFormat.kt @@ -22,6 +22,7 @@ package org.opendc.trace.spi +import org.opendc.trace.TableColumn import org.opendc.trace.TableReader import org.opendc.trace.TableWriter import java.nio.file.Path @@ -68,10 +69,11 @@ public interface TraceFormat { * * @param path The path to the trace to open. * @param table The name of the table to open a [TableReader] for. + * @param projection The list of [TableColumn]s to project or `null` if no projection is performed. * @throws IllegalArgumentException If [table] does not exist. * @return A [TableReader] instance for the table. */ - public fun newReader(path: Path, table: String): TableReader + public fun newReader(path: Path, table: String, projection: List<TableColumn<*>>?): TableReader /** * Open a [TableWriter] for the specified [table]. |