Java Code Examples for org.embulk.spi.Column#visit()

The following examples show how to use org.embulk.spi.Column#visit() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: EmbulkWriteSupport.java    From embulk-output-parquet with MIT License 5 votes vote down vote up 
@Override
public void write(PageReader record)
{
    final ColumnVisitor visitor = new ParquetColumnVisitor(record, consumer);
    consumer.startMessage();
    for (Column c : schema.getColumns()) {
        if (!record.isNull(c)) {
            consumer.startField(c.getName(), c.getIndex());
            c.visit(visitor);
            consumer.endField(c.getName(), c.getIndex());
        }
    }
    consumer.endMessage();
}
Example 2
Source File: JsonlParserPlugin.java    From embulk-parser-jsonl with MIT License 4 votes vote down vote up 
@Override
public void run(TaskSource taskSource, Schema schema, FileInput input, PageOutput output)
{
    PluginTask task = taskSource.loadTask(PluginTask.class);

    setColumnNameValues(schema);

    final SchemaConfig schemaConfig = getSchemaConfig(task);
    final TimestampParser[] timestampParsers = Timestamps.newTimestampColumnParsers(task, schemaConfig);
    final LineDecoder decoder = newLineDecoder(input, task);
    final JsonParser jsonParser = newJsonParser();
    final boolean stopOnInvalidRecord = task.getStopOnInvalidRecord();

    try (final PageBuilder pageBuilder = new PageBuilder(Exec.getBufferAllocator(), schema, output)) {
        ColumnVisitorImpl visitor = new ColumnVisitorImpl(task, schema, pageBuilder, timestampParsers);

        while (decoder.nextFile()) { // TODO this implementation should be improved with new JsonParser API on Embulk v0.8.3
            lineNumber = 0;

            while ((line = decoder.poll()) != null) {
                lineNumber++;

                try {
                    Value value = jsonParser.parse(line);

                    if (!value.isMapValue()) {
                        throw new JsonRecordValidateException("Json string is not representing map value.");
                    }

                    final Map<Value, Value> record = value.asMapValue().map();
                    for (Column column : schema.getColumns()) {
                        Value v = record.get(getColumnNameValue(column));
                        visitor.setValue(v);
                        column.visit(visitor);
                    }

                    pageBuilder.addRecord();
                }
                catch (JsonRecordValidateException | JsonParseException e) {
                    if (stopOnInvalidRecord) {
                        throw new DataException(String.format("Invalid record at line %d: %s", lineNumber, line), e);
                    }
                    log.warn(String.format("Skipped line %d (%s): %s", lineNumber, e.getMessage(), line));
                }
            }
        }

        pageBuilder.finish();
    }
}