/**
* AnalyzerBeans
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.eobjects.analyzer.beans.coalesce;
import org.eobjects.analyzer.beans.api.Categorized;
import org.eobjects.analyzer.beans.api.Configured;
import org.eobjects.analyzer.beans.api.Description;
import org.eobjects.analyzer.beans.api.OutputColumns;
import org.eobjects.analyzer.beans.api.Transformer;
import org.eobjects.analyzer.beans.api.TransformerBean;
import org.eobjects.analyzer.beans.categories.NumbersCategory;
import org.eobjects.analyzer.data.InputColumn;
import org.eobjects.analyzer.data.InputRow;
@TransformerBean("Coalesce numbers")
@Description("Returns the first non-null number. Use it to identify the most "
+ "accurate or most recent number if multiple observations have been recorded in columns.")
@Categorized({ NumbersCategory.class })
@Deprecated
public class CoalesceNumbersTransformer implements Transformer<Number> {
@Configured
InputColumn<Number>[] input;
public CoalesceNumbersTransformer() {
}
@SafeVarargs
public CoalesceNumbersTransformer(InputColumn<Number>... input) {
this();
this.input = input;
}
@Override
public OutputColumns getOutputColumns() {
return new OutputColumns("Coalesced number");
}
@Override
public Number[] transform(InputRow inputRow) {
for (InputColumn<Number> column : input) {
Number value = inputRow.getValue(column);
if (value != null) {
return new Number[] { value };
}
}
return new Number[1];
}
}