<commit_before>/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.facebook.presto.orc.metadata.statistics;

import io.airlift.slice.Slice;

import java.util.List;
import java.util.Optional;

import static com.facebook.presto.orc.metadata.statistics.StringStatistics.STRING_VALUE_BYTES_OVERHEAD;
import static com.google.common.base.Verify.verify;
import static java.util.Objects.requireNonNull;

public class StringStatisticsBuilder
        implements SliceColumnStatisticsBuilder
{
    private long nonNullValueCount;
    private Slice minimum;
    private Slice maximum;
    private long sum;

    public long getNonNullValueCount()
    {
        return nonNullValueCount;
    }

    @Override
    public void addValue(Slice value)
    {
        requireNonNull(value, "value is null");

        nonNullValueCount++;
        sum += value.length();
        updateMinMax(value);
    }

    private void updateMinMax(Slice value)
    {
        if (minimum == null) {
            minimum = value;
            maximum = value;
        }
        else if (value.compareTo(minimum) <= 0) {
            minimum = value;
        }
        else if (value.compareTo(maximum) >= 0) {
            maximum = value;
        }
    }

    private void addStringStatistics(long valueCount, StringStatistics value)
    {
        requireNonNull(value, "value is null");
        requireNonNull(value.getMin(), "value.getMin() is null");
        requireNonNull(value.getMax(), "value.getMax() is null");

        nonNullValueCount += valueCount;
        sum += value.getSum();
        updateMinMax(value.getMin());
        updateMinMax(value.getMax());
    }

    private Optional<StringStatistics> buildStringStatistics()
    {
        if (nonNullValueCount == 0) {
            return Optional.empty();
        }
        return Optional.of(new StringStatistics(minimum, maximum, sum));
    }

    @Override
    public ColumnStatistics buildColumnStatistics()
    {
        Optional<StringStatistics> stringStatistics = buildStringStatistics();
        stringStatistics.ifPresent(s -> verify(nonNullValueCount > 0));
        return new ColumnStatistics(
                nonNullValueCount,
                stringStatistics.map(s -> STRING_VALUE_BYTES_OVERHEAD + sum / nonNullValueCount).orElse(0L),
                null,
                null,<commit_msg>Ensure ORC StringStatistics sum does not overflow<commit_after>/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.facebook.presto.orc.metadata.statistics;

import io.airlift.slice.Slice;

import java.util.List;
import java.util.Optional;

import static com.facebook.presto.orc.metadata.statistics.StringStatistics.STRING_VALUE_BYTES_OVERHEAD;
import static com.google.common.base.Verify.verify;
import static java.lang.Math.addExact;
import static java.util.Objects.requireNonNull;

public class StringStatisticsBuilder
        implements SliceColumnStatisticsBuilder
{
    private long nonNullValueCount;
    private Slice minimum;
    private Slice maximum;
    private long sum;

    public long getNonNullValueCount()
    {
        return nonNullValueCount;
    }

    @Override
    public void addValue(Slice value)
    {
        requireNonNull(value, "value is null");

        nonNullValueCount++;
        sum = addExact(sum, value.length());
        updateMinMax(value);
    }

    private void updateMinMax(Slice value)
    {
        if (minimum == null) {
            minimum = value;
            maximum = value;
        }
        else if (value.compareTo(minimum) <= 0) {
            minimum = value;
        }
        else if (value.compareTo(maximum) >= 0) {
            maximum = value;
        }
    }

    private void addStringStatistics(long valueCount, StringStatistics value)
    {
        requireNonNull(value, "value is null");
        requireNonNull(value.getMin(), "value.getMin() is null");
        requireNonNull(value.getMax(), "value.getMax() is null");

        nonNullValueCount += valueCount;
        sum = addExact(sum, value.getSum());
        updateMinMax(value.getMin());
        updateMinMax(value.getMax());
    }

    private Optional<StringStatistics> buildStringStatistics()
    {
        if (nonNullValueCount == 0) {
            return Optional.empty();
        }
        return Optional.of(new StringStatistics(minimum, maximum, sum));
    }

    @Override
    public ColumnStatistics buildColumnStatistics()
    {
        Optional<StringStatistics> stringStatistics = buildStringStatistics();
        stringStatistics.ifPresent(s -> verify(nonNullValueCount > 0));
        return new ColumnStatistics(
                nonNullValueCount,
                stringStatistics.map(s -> STRING_VALUE_BYTES_OVERHEAD + sum / nonNullValueCount).orElse(0L),
                null,
                null,
{'fraction_non_alphanumeric': 0.0905179831354328, 'fraction_numerical': 0.003097573567372225, 'mean_word_length': 2.7764782326185835, 'pattern_counts': {'":': 0, '<': 9, '<?xml version=': 0, '>': 15, 'https://': 0, 'lorem ipsum': 0, 'www.': 2, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '6127229', 'n_tokens_mistral': 1553, 'n_tokens_neox': 1519, 'n_words': 432}