Example usage for java.util OptionalLong isPresent

Introduction

In this page you can find the example usage for java.util OptionalLong isPresent.

Prototype

boolean isPresent

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Document

If true then the value is present, otherwise indicates no value is present

Usage

From source file:org.talend.dataprep.schema.xls.XlsSchemaParser.java

/**
 *
 *
 * @param colId the column id.//from  w w w . j  ava  2  s .c  o m
 * @param columnRows all rows with previously guessed type: key=row number, value= guessed type
 * @param averageHeaderSize
 * @return
 */
private Type guessColumnType(Integer colId, SortedMap<Integer, String> columnRows, int averageHeaderSize) {

    // calculate number per type

    Map<String, Long> perTypeNumber = columnRows.tailMap(averageHeaderSize).values() //
            .stream() //
            .collect(Collectors.groupingBy(w -> w, Collectors.counting()));

    OptionalLong maxOccurrence = perTypeNumber.values().stream().mapToLong(Long::longValue).max();

    if (!maxOccurrence.isPresent()) {
        return ANY;
    }

    List<String> duplicatedMax = new ArrayList<>();

    perTypeNumber.forEach((type1, aLong) -> {
        if (aLong >= maxOccurrence.getAsLong()) {
            duplicatedMax.add(type1);
        }
    });

    String guessedType;
    if (duplicatedMax.size() == 1) {
        guessedType = duplicatedMax.get(0);
    } else {
        // as we have more than one type we guess ANY
        guessedType = ANY.getName();
    }

    LOGGER.debug("guessed type for column #{} is {}", colId, guessedType);
    return Type.get(guessedType);
}

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From source file:org.wso2.carbon.apimgt.hybrid.gateway.configurator.Configurator.java

/**
 * Gets the last WUM updated timestamp from the wum summary file in the 'wumDir' path
 *
 * @return last WUM updated timestamp// w  w w  .  j a  v a  2  s .  c o m
 */
private static String getLastWumUpdatedTimestamp() {
    String lastWumUpdateTimestamp = "-1";
    Path wumDir = Paths.get(carbonHome, ConfigConstants.UPDATES_DIR, ConfigConstants.WUM_DIR);
    if (Files.exists(wumDir)) {
        OptionalLong max = OptionalLong.empty();
        try {
            // List files in WUM directory, filter file names for numbers and get the
            // timestamps from file names, then get the maximum timestamp as the
            // the last wum updated timestamp.
            max = Files.list(wumDir).filter(path -> !Files.isDirectory(path))
                    .map(path -> path.getFileName().toString()).filter(StringUtils::isNumeric)
                    .mapToLong(Long::parseLong).max();
        } catch (IOException e) {
            log.error("An error occurred when retrieving last wum update time.", e);
        }
        if (max.isPresent()) {
            lastWumUpdateTimestamp = String.valueOf(max.getAsLong());
        } else {
            log.warn("No WUM update information found in the file path: " + wumDir.toString());
        }
    } else {
        log.warn("WUM directory not found in the file path: " + wumDir.toString());
    }
    return lastWumUpdateTimestamp;
}

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