com.paolodragone.util.io.datasets.tsv.TsvDataRecord.java Source code

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Here is the source code for com.paolodragone.util.io.datasets.tsv.TsvDataRecord.java

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/*
 * Copyright Paolo Dragone 2014
 *
 * This file is part of WiktionarySemanticNetwork.
 *
 * WiktionarySemanticNetwork is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * WiktionarySemanticNetwork 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with WiktionarySemanticNetwork.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.paolodragone.util.io.datasets.tsv;

import com.google.common.collect.ImmutableList;
import com.paolodragone.util.io.datasets.DataColumn;
import com.paolodragone.util.io.datasets.DataRecord;
import gnu.trove.map.TObjectShortMap;
import gnu.trove.map.hash.TObjectShortHashMap;
import org.apache.commons.csv.CSVRecord;

import java.util.Collection;
import java.util.Iterator;

/**
 * Wrapper for {@link org.apache.commons.csv.CSVRecord} to use it with {@link TsvDataSet}.
 *
 * @author Paolo Dragone
 */
public final class TsvDataRecord implements DataRecord {

    private final TObjectShortMap<String> mapping = new TObjectShortHashMap<>();
    private final ImmutableList<String> values;

    TsvDataRecord(CSVRecord record, DataColumn[] header) {
        if (header.length > Short.MAX_VALUE) {
            throw new IllegalStateException("Current header has too many columns.");
        }

        ImmutableList.Builder<String> builder = ImmutableList.builder();
        for (short i = 0; i < header.length; i++) {
            DataColumn key = header[i];
            mapping.put(key.getColumnName(), i);
            builder.add(record.get(key.getColumnName()));
        }
        values = builder.build();
    }

    @Override
    public String get(DataColumn column) {
        if (!mapping.containsKey(column.getColumnName())) {
            throw new IllegalArgumentException(
                    String.format("No mapping for column '%s'.", column.getColumnName()));
        }
        return values.get(mapping.get(column.getColumnName()));
    }

    @Override
    public Collection<String> values() {
        return values;
    }

    @Override
    public Iterator<String> iterator() {
        return values.iterator();
    }
}