Examples with AttributeType edu.uci.ics.texera.api.schema.AttributeType used on opensource projects

Example 31 with AttributeType

use of edu.uci.ics.texera.api.schema.AttributeType in project textdb by TextDB.

the class WordCloudSink method open.

@Override
public void open() throws TexeraException {
    if (cursor != CLOSED) {
        return;
    }
    if (inputOperator == null) {
        throw new TexeraException(ErrorMessages.INPUT_OPERATOR_NOT_SPECIFIED);
    }
    inputOperator.open();
    this.addPayload = !inputOperator.getOutputSchema().containsAttribute(SchemaConstants.PAYLOAD);
    Schema schema = inputOperator.getOutputSchema();
    Attribute textColumn = schema.getAttribute(predicate.getAttribute());
    AttributeType nameColumnType = textColumn.getType();
    if (!nameColumnType.equals(AttributeType.TEXT)) {
        throw new DataflowException("Type of name column should be text.");
    }
    outputSchema = new Schema.Builder().add(new Attribute("word", AttributeType.STRING), new Attribute("count", AttributeType.INTEGER)).build();
    cursor = OPENED;
}