Example usage for java.util List isEmpty

Introduction

In this page you can find the example usage for java.util List isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this list contains no elements.

Usage

From source file:grails.plugins.sitemapper.ValidationUtils.java

public static void assertDataObjects(List<PageMapDataObject> dataObjectList) {
    if (dataObjectList == null || dataObjectList.isEmpty())
        throw new SitemapperException("Data objects can not be null or empty");
}

From source file:Main.java

/**
 * Determine if the app is currently visible to the user
 *
 * @param context//from   ww  w  . ja va2s  . com
 * @return boolean Return true if the app is visible to the user otherwise false
 */
public static boolean isAppInForeground(Context context) {
    final List<RunningTaskInfo> task = ((ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE))
            .getRunningTasks(1);
    if (task.isEmpty() && task.size() > 0) {
        return false;
    }
    return task.get(0).topActivity.getPackageName().equalsIgnoreCase(context.getPackageName());
}

From source file:com.epam.cme.storefront.util.MetaSanitizerUtil.java

/**
 * Takes a List of KeywordModels and returns a comma separated list of keywords as String.
 * // ww w.  j  a va  2s.  c o m
 * @param keywords
 *            List of KeywordModel objects
 * @return String of comma separated keywords
 */
public static String sanitizeKeywords(final List<KeywordModel> keywords) {
    if (keywords != null && !keywords.isEmpty()) {
        // Remove duplicates
        final Set<String> keywordSet = new HashSet<String>(keywords.size());
        for (final KeywordModel kw : keywords) {
            keywordSet.add(kw.getKeyword());
        }

        // Format keywords, join with comma
        final StringBuilder sb = new StringBuilder();
        for (final String kw : keywordSet) {
            sb.append(kw).append(',');
        }
        if (sb.length() > 0) {
            // Remove last comma
            return sb.substring(0, sb.length() - 1);
        }
    }
    return "";
}

From source file:Main.java

/**
 * Returns the first element of the collection.
 * //w  w  w.  j  av a  2  s .  c  o m
 * @param <T>
 *            the element type
 * @param list
 *            the collection
 * @return the first element or null if the list is empty
 */
@SuppressWarnings("unchecked")
public static <T> T first(List<T> list) {
    if (list instanceof Deque<?>)
        return ((Deque<T>) list).getFirst();
    return list.isEmpty() ? null : list.get(0);
}

From source file:de.metas.ui.web.view.json.JSONDocumentViewOrderBy.java

public static final List<DocumentQueryOrderBy> unwrapList(final List<JSONDocumentViewOrderBy> jsonOrderBys) {
    if (jsonOrderBys == null || jsonOrderBys.isEmpty()) {
        return ImmutableList.of();
    }/*from w w  w .  j a v  a 2  s  . com*/

    return jsonOrderBys.stream().map(jsonOrderBy -> unwrap(jsonOrderBy)).filter(orderBy -> orderBy != null)
            .collect(GuavaCollectors.toImmutableList());
}

From source file:Main.java

/**
 * Returns the last element of the collection.
 * //from  w ww . j  a v a  2 s.  c o  m
 * @param <T>
 *            the element type
 * @param list
 *            the collection
 * @return the last element or null if the list is empty
 */
@SuppressWarnings("unchecked")
public static <T> T last(List<T> list) {
    if (list instanceof Deque<?>)
        return ((Deque<T>) list).getLast();
    return list.isEmpty() ? null : list.get(list.size() - 1);
}

From source file:Main.java

/**
 * Calculeaza deviatia maxima de la media pentru datele primite
 *
 * @param data//from  w w  w. j  a  va  2 s.c  o m
 * @return deviatia maxima de la medie
 */
public static double computeFluctuations(List<Double> data) {
    double sum = 0;
    int index = 0;
    double media = 0;
    double max = 0;

    if (data.isEmpty()) {
        return 0f;
    }

    for (Double i : data) {
        sum = sum + i;
    }

    media = sum / data.size();

    for (Double i : data) {
        Double difference = Math.abs(media - i);
        if (max < difference) {
            max = difference;
        }
    }
    return max;
}

From source file:com.asakusafw.generator.HadoopBulkLoaderDDLGenerator.java

private static String findVariable(List<String> variableNames, boolean mandatory) {
    assert variableNames != null;
    assert variableNames.isEmpty() == false;
    String value = null;/*www.ja va 2 s. co m*/
    for (String var : variableNames) {
        value = System.getProperty(var);
        if (value == null) {
            value = System.getenv(var);
        }
        if (value != null) {
            break;
        }
    }
    if (mandatory && value == null) {
        throw new IllegalStateException(MessageFormat
                .format("\"{0}\"??????", variableNames.get(0)));
    }
    return value;
}

From source file:com.parse.ParseRESTQueryCommand.java

static <T extends ParseObject> Map<String, String> encode(ParseQuery.State<T> state,
        boolean count) {
    ParseEncoder encoder = PointerEncoder.get();
    HashMap<String, String> parameters = new HashMap<>();
    List<String> order = state.order();
    if (!order.isEmpty()) {
        parameters.put("order", ParseTextUtils.join(",", order));
    }//from ww  w  .  ja va 2 s .c o  m

    ParseQuery.QueryConstraints conditions = state.constraints();
    if (!conditions.isEmpty()) {
        JSONObject encodedConditions = (JSONObject) encoder.encode(conditions);
        parameters.put("where", encodedConditions.toString());
    }

    // This is nullable since we allow unset selectedKeys as well as no selectedKeys
    Set<String> selectedKeys = state.selectedKeys();
    if (selectedKeys != null) {
        parameters.put("keys", ParseTextUtils.join(",", selectedKeys));
    }

    Set<String> includeds = state.includes();
    if (!includeds.isEmpty()) {
        parameters.put("include", ParseTextUtils.join(",", includeds));
    }

    if (count) {
        parameters.put("count", Integer.toString(1));
    } else {
        int limit = state.limit();
        if (limit >= 0) {
            parameters.put("limit", Integer.toString(limit));
        }

        int skip = state.skip();
        if (skip > 0) {
            parameters.put("skip", Integer.toString(skip));
        }
    }

    Map<String, Object> extraOptions = state.extraOptions();
    for (Map.Entry<String, Object> entry : extraOptions.entrySet()) {
        Object encodedExtraOptions = encoder.encode(entry.getValue());
        parameters.put(entry.getKey(), encodedExtraOptions.toString());
    }

    if (state.isTracingEnabled()) {
        parameters.put("trace", Integer.toString(1));
    }
    return parameters;
}

From source file:Main.java

public static List<String> removeAllIgnoreCase(List<String> all, List<String> beside) {
    List<String> rst = new ArrayList<String>();
    if (all == null || all.isEmpty()) {
        return rst;
    }//from  ww w.  ja  v a 2s  .  c  om
    if (beside == null || beside.isEmpty()) {
        return all;
    }

    for (String desc : all) {
        boolean eq = false;
        for (String str : beside) {
            if ((desc + "").equalsIgnoreCase(str)) {
                eq = true;
                break;
            }
        }
        if (!eq) {
            rst.add(desc);
        }
    }

    return rst;
}