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:io.fabric8.vertx.maven.plugin.components.impl.GroovyExtensionCombiner.java

private static byte[] read(List<String> lines) {
    if (lines == null || lines.isEmpty()) {
        return new byte[0];
    }//w  ww . j  ava  2s . co m
    StringBuilder buffer = new StringBuilder();
    for (String l : lines) {
        buffer.append(l).append("\n");
    }
    return buffer.toString().getBytes();
}

From source file:Main.java

public static boolean isFlashSupported(Camera camera) {
    /* Credits: Top answer at http://stackoverflow.com/a/19599365/868173 */
    if (camera != null) {
        Camera.Parameters parameters = camera.getParameters();

        if (parameters.getFlashMode() == null) {
            return false;
        }/*w  w w . j  av a 2  s . c o m*/

        List<String> supportedFlashModes = parameters.getSupportedFlashModes();
        if (supportedFlashModes == null || supportedFlashModes.isEmpty() || supportedFlashModes.size() == 1
                && supportedFlashModes.get(0).equals(Camera.Parameters.FLASH_MODE_OFF)) {
            return false;
        }
    } else {
        return false;
    }

    return true;
}

From source file:Main.java

public static byte[] toPrimitiveByte(final List<Byte> array) {
    if (array == null) {
        return null;
    }//  w ww  . j ava  2  s  . c  o  m
    if (array.isEmpty()) {
        return EMPTY_BYTE_ARRAY;
    }
    final byte[] result = new byte[array.size()];
    for (int i = 0; i < array.size(); i++) {
        result[i] = array.get(i).byteValue();
    }
    return result;
}

From source file:Main.java

/**
 * Gets the immediately child element from the parent element.
 * //www.j a  va  2 s.  co m
 * @param parent the parent element in the element tree
 * @param tagName the specified tag name
 * @return immediately child element of parent element, NULL otherwise
 */
public static Element getChildElement(Element parent, String tagName) {
    List<Element> children = getChildElements(parent, tagName);

    if (children.isEmpty()) {
        return null;
    } else {
        return children.get(0);
    }
}

From source file:Main.java

/**
 * Gets the first element of the list. If the list is null or empty, null
 * is returned./*from   w w w  . j  a v a  2  s  .c om*/
 *
 * @param   <T>
 *      The type of element in the list.
 * @param   list
 *      The list to get the first element from.
 * @return
 *      The first element from the list, if one exists. Otherwise, null.
 */
public static <T> T getFirst(final List<? extends T> list) {
    if (list == null || list.isEmpty()) {
        return null;
    } else {
        return list.get(0);
    }
}

From source file:com.edmunds.etm.tools.urltoken.util.OptionUtils.java

public static String firstNonOptionArgument(OptionSet options) {
    List<String> arguments = options.nonOptionArguments();
    if (arguments.isEmpty()) {
        return null;
    }//  w w  w. java 2 s .c o m

    String tokenName = arguments.get(0);
    if (StringUtils.isBlank(tokenName)) {
        return null;
    }

    return tokenName;
}

From source file:com.netflix.spinnaker.clouddriver.kubernetes.v2.security.KubernetesSelector.java

public static KubernetesSelector contains(String key, List<String> values) {
    if (values == null || values.isEmpty()) {
        throw new IllegalArgumentException("At least one value must be supplied to a 'contains' selector");
    }//from w ww . j a v  a  2 s  .c o  m

    return new KubernetesSelector(Kind.CONTAINS, key, values);
}

From source file:com.netflix.spinnaker.clouddriver.kubernetes.v2.security.KubernetesSelector.java

public static KubernetesSelector notContains(String key, List<String> values) {
    if (values == null || values.isEmpty()) {
        throw new IllegalArgumentException("At least one value must be supplied to a 'notcontains' selector");
    }// w w w  .  j a va2s .  co m

    return new KubernetesSelector(Kind.NOT_CONTAINS, key, values);
}

From source file:Main.java

public static String getLocality(Context context) {
    @SuppressWarnings("static-access")
    LocationManager lm = (LocationManager) context.getSystemService(context.LOCATION_SERVICE);
    if (lm == null)
        return "";
    Location l = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
    if (l == null)
        return "";
    Geocoder gc = new Geocoder(context);

    try {//w w w .  j av a2  s. co  m
        List<Address> address = gc.getFromLocation(l.getLatitude(), l.getLongitude(), 1);
        if (address != null && address.isEmpty() == false)
            return address.get(0).getLocality();
    } catch (Exception e) {
        return "";
    }

    return "";
}

From source file:Main.java

public static char[] toPrimitiveChar(final List<Integer> array) {
    if (array == null) {
        return null;
    }//from  ww w  .j a va2  s .c o m
    if (array.isEmpty()) {
        return EMPTY_CHAR_ARRAY;
    }
    final char[] result = new char[array.size()];
    for (int i = 0; i < array.size(); i++) {
        result[i] = (char) array.get(i).byteValue();
    }
    return result;
}