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Engine Table: Implementation and closely-coupled utilities

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/**
 * Copyright (c) 2016-2022 Deephaven Data Labs and Patent Pending
 */
package io.deephaven.engine.util;

import io.deephaven.engine.table.Table;
import io.deephaven.engine.table.ColumnSource;
import io.deephaven.engine.rowset.RowSet;
import io.deephaven.time.DateTimeUtils;
import org.apache.commons.text.StringEscapeUtils;
import org.jetbrains.annotations.NotNull;

import java.time.Instant;
import java.util.Collection;
import java.util.List;

public class HtmlTable {
    @NotNull
    public static String html(Table source) {
        List columnNames = source.getDefinition().getColumnNames();
        String[] columns = columnNames.toArray(new String[columnNames.size()]);
        StringBuilder out = new StringBuilder();
        out.append("\n");

        out.append("\n");
        for (String column : columns) {
            out.append("\n");
        }
        out.append("\n");

        final Collection columnSources = source.getColumnSources();
        for (final RowSet.Iterator ii = source.getRowSet().iterator(); ii.hasNext();) {
            out.append("");
            final long key = ii.nextLong();
            for (ColumnSource columnSource : columnSources) {
                out.append("");
            }
            out.append("\n");
        }
        out.append("").append(column).append("
");
                final Object value = columnSource.get(key);
                if (value instanceof String) {
                    out.append(StringEscapeUtils.escapeCsv((String) value));
                } else if (value instanceof Instant) {
                    out.append(DateTimeUtils.formatDateTime((Instant) value, DateTimeUtils.timeZone()));
                } else {
                    out.append(TableTools.nullToNullString(value));
                }
                out.append("\n");
        return out.toString();
    }

}