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package com.google.refine.importers.tree;

import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;

/**
 * A column group describes a branch in tree structured data
 */
public class ImportColumnGroup extends ImportVertical {

    public Map subgroups = new LinkedHashMap();
    public Map columns = new LinkedHashMap();
    public int nextRowIndex; // TODO: this can be hoisted into superclass

    @Override
    void tabulate() {
        for (ImportColumn c : columns.values()) {
            c.tabulate();
            nonBlankCount = Math.max(nonBlankCount, c.nonBlankCount);
        }
        for (ImportColumnGroup g : subgroups.values()) {
            g.tabulate();
            nonBlankCount = Math.max(nonBlankCount, g.nonBlankCount);
        }
    }

    @Override
    public String toString() {
        return String.format("name=%s, nextRowIndex=%d, columns={%s}, subgroups={{%s}}",
                name, nextRowIndex, StringUtils.join(columns.keySet(), ','),
                StringUtils.join(subgroups.keySet(), ','));
    }
}