Example usage for java.util LinkedList addFirst

Introduction

In this page you can find the example usage for java.util LinkedList addFirst.

Prototype

public void addFirst(E e) 

Source Link

Document

Inserts the specified element at the beginning of this list.

Usage

From source file:Main.java

public static <T> Collection<T> reverse(final Collection<T> collection) {
    final LinkedList<T> newCollection = new LinkedList<>();
    final Iterator<T> i = collection.iterator();
    while (i.hasNext()) {
        newCollection.addFirst(i.next());
    }/*  w w  w .  ja  v a 2 s .c o  m*/
    return newCollection;
}

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From source file:Main.java

/**
 * Returns the parent folders of this file, starting from the root.
 *
 * @return the parent folders of this file, starting from the root
 *///from  w w w.  j a  v  a2 s.  c  o  m
public static List<File> getParents(File file) {
    LinkedList<File> parents = new LinkedList<>();
    File parent = file.getParentFile();
    while (null != parent) {
        parents.addFirst(parent);
        parent = parent.getParentFile();
    }
    return parents;
}

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From source file:CollectionUtilities.java

public static Collection reverse(Collection collection) {
    LinkedList newCollection = new LinkedList();
    Iterator i = collection.iterator();
    while (i.hasNext()) {
        newCollection.addFirst(i.next());
    }/*from   ww  w .  j av a 2  s. c  o  m*/
    return newCollection;
}

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From source file:Main.java

public static int deepHashCode(Object obj) {
    Set visited = new HashSet();
    LinkedList<Object> stack = new LinkedList<Object>();
    stack.addFirst(obj);
    int hash = 0;

    while (!stack.isEmpty()) {
        obj = stack.removeFirst();/*from w  w w .  j av  a2  s.c  om*/
        if (obj == null || visited.contains(obj)) {
            continue;
        }

        visited.add(obj);

        if (obj.getClass().isArray()) {
            int len = Array.getLength(obj);
            for (int i = 0; i < len; i++) {
                stack.addFirst(Array.get(obj, i));
            }
            continue;
        }

        if (obj instanceof Collection) {
            stack.addAll(0, (Collection) obj);
            continue;
        }

        if (obj instanceof Map) {
            stack.addAll(0, ((Map) obj).keySet());
            stack.addAll(0, ((Map) obj).values());
            continue;
        }

        if (hasCustomHashCode(obj.getClass())) {
            hash += obj.hashCode();
            continue;
        }

        Collection<Field> fields = getDeepDeclaredFields(obj.getClass());
        for (Field field : fields) {
            try {
                stack.addFirst(field.get(obj));
            } catch (Exception ignored) {
            }
        }
    }
    return hash;
}

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From source file:com.github.jknack.amd4j.Amd4j.java

/**
 * Resolve a candidate uri to an existing uri. We need this bc, dependencies might or mightn't
 * have a file extension, or they might have a '.' in the file's name.
 *
 * @param loader The resource loader./*from w ww  . jav  a 2s  .  co  m*/
 * @param uri The candidate uri.
 * @return An existing uri for the candidate uri.
 * @throws IOException If the uri can't be resolved.
 */
private static ResourceURI resolve(final ResourceLoader loader, final ResourceURI uri) throws IOException {
    String path = uri.getPath();
    LinkedList<ResourceURI> candidates = new LinkedList<ResourceURI>();
    candidates.add(uri);
    ResourceURI alternative = ResourceURI.create(uri.toString() + ".js");
    if (isEmpty(getExtension(path))) {
        candidates.addFirst(alternative);
    } else {
        candidates.addLast(alternative);
    }
    for (ResourceURI candidate : candidates) {
        if (loader.exists(candidate)) {
            return candidate;
        }
    }
    // force a file not found exception
    throw new FileNotFoundException(uri.toString());
}

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From source file:och.service.props.impl.FileProps.java

public static List<FileProps> createFileProps(Collection<String> paths) {
    LinkedList<FileProps> list = new LinkedList<>();
    for (String path : paths) {
        File file = new File(path);
        if (!file.exists()) {
            log.error("can't find file by path: " + path);
            continue;
        }//from ww  w. ja  v a  2 s. co m
        list.addFirst(new FileProps(file));
    }
    return list;
}

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From source file:azkaban.jobtype.HadoopSecureSparkWrapper.java

protected static String[] handleNodeLabeling(String[] argArray) {
    // HadoopSparkJob will set env var on this process if we enable node labeling policy for spark jobtype.
    // We also detect the yarn cluster settings has enable node labeling
    // Enabling node labeling policy for spark job type is different from enabling node labeling
    // feature for Yarn. This config inside Spark job type is to enforce node labeling feature for all
    // Spark applications submitted via Azkaban Spark job type.
    Configuration conf = new Configuration();
    boolean nodeLabelingYarn = conf.getBoolean(YARN_CONF_NODE_LABELING_ENABLED, false);
    String nodeLabelingProp = System.getenv(HadoopSparkJob.SPARK_NODE_LABELING_ENV_VAR);
    boolean nodeLabelingPolicy = nodeLabelingProp != null && nodeLabelingProp.equals(Boolean.TRUE.toString());
    String autoNodeLabelProp = System.getenv(HadoopSparkJob.SPARK_AUTO_NODE_LABELING_ENV_VAR);
    boolean autoNodeLabeling = autoNodeLabelProp != null && autoNodeLabelProp.equals(Boolean.TRUE.toString());
    String desiredNodeLabel = System.getenv(HadoopSparkJob.SPARK_DESIRED_NODE_LABEL_ENV_VAR);

    SparkConf sparkConf = getSparkProperties();

    if (nodeLabelingYarn && nodeLabelingPolicy) {
        ignoreUserSpecifiedNodeLabelParameter(argArray, autoNodeLabeling);

        // If auto node labeling is enabled, automatically sets spark.yarn.executor.nodeLabelExpression
        // config based on user requested resources.
        if (autoNodeLabeling) {
            if (isLargeContainerRequired(argArray, conf, sparkConf)) {
                LinkedList<String> argList = new LinkedList<String>(Arrays.asList(argArray));
                argList.addFirst(SPARK_EXECUTOR_NODE_LABEL_EXP + "=" + desiredNodeLabel);
                argList.addFirst(SparkJobArg.SPARK_CONF_PREFIX.sparkParamName);
                argArray = argList.toArray(new String[argList.size()]);
            }//from   w w w  .ja  v a2 s.  c om
        }
    }
    return argArray;
}

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From source file:azkaban.jobtype.HadoopSecureSparkWrapper.java

/**
 * This method is used to enforce queue for Spark application. Rules are explained below.
 * a) If dynamic resource allocation is enabled for selected spark version and application requires large container
 *    then schedule it into default queue by a default conf(spark.yarn.queue) in spark-defaults.conf.
 * b) If dynamic resource allocation is enabled for selected spark version and application requires small container
 *    then schedule it into Org specific queue.
 * c) If dynamic resource allocation is disabled for selected spark version then schedule application into default
 *    queue by a default conf(spark.yarn.queue) in spark-defaults.conf.
 * @param argArray/*from   w w  w. j  a  va 2  s. c o m*/
 * @return
 */
protected static String[] handleQueueEnforcement(String[] argArray) {
    SparkConf sparkConf = getSparkProperties();
    Configuration conf = new Configuration();

    int queueParameterIndex = getUserSpecifiedQueueParameterIndex(argArray);
    boolean requiredSparkDefaultQueue = false;
    if (sparkConf.getBoolean(SPARK_CONF_DYNAMIC_ALLOC_ENABLED, false)) {
        if (isLargeContainerRequired(argArray, conf, sparkConf)) {
            // Case A
            requiredSparkDefaultQueue = true;
            logger.info(
                    "Spark application requires Large containers. Scheduling this application into default queue by a "
                            + "default conf(spark.yarn.queue) in spark-defaults.conf.");
        } else {
            // Case B
            logger.info(
                    "Dynamic allocation is enabled for selected spark version and application requires small container. "
                            + "Hence, scheduling this application into Org specific queue");
            if (queueParameterIndex == -1) {
                LinkedList<String> argList = new LinkedList(Arrays.asList(argArray));
                argList.addFirst(SPARK_CONF_QUEUE + "=" + DEFAULT_QUEUE);
                argList.addFirst(SparkJobArg.SPARK_CONF_PREFIX.sparkParamName);
                argArray = argList.toArray(new String[argList.size()]);
            }
        }
    } else {
        // Case C
        logger.info(
                "Spark version, selected for this application, doesn't support dynamic allocation. Scheduling this "
                        + "application into default queue by a default conf(spark.yarn.queue) in spark-defaults.conf.");
        requiredSparkDefaultQueue = true;
    }

    if (queueParameterIndex != -1 && requiredSparkDefaultQueue) {
        logger.info("Azbakan enforces spark.yarn.queue queue. Ignore user param: "
                + argArray[queueParameterIndex] + " " + argArray[queueParameterIndex + 1]);
        argArray[queueParameterIndex] = null;
        argArray[queueParameterIndex + 1] = null;
    }
    return argArray;
}

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From source file:org.search.niem.uml.merge.NamespaceMergeUtil.java

private static <T extends EObject> T findEquivalentNamedElement(final NamedElement referenceLibraryElement,
        final Package inThePIM) {
    // first find the target namespace of the referenceLibraryElement
    final Package namespaceInTheReferenceLibrary = findNearestNiemNamespacePackage(
            referenceLibraryElement.getNearestPackage());
    if (namespaceInTheReferenceLibrary == null) {
        return null;
    }/*from  w  ww .j a  v  a 2  s.com*/
    // find the Package with the same targetNamespace in the PIM
    final Package namespaceInThePIM = findPackageWithTargetNamespace(inThePIM,
            getTargetNamespace(namespaceInTheReferenceLibrary));
    if (namespaceInThePIM == null) {
        return null;
    }
    final LinkedList<Element> pathToReferenceLibraryElement = new LinkedList<>();
    NamedElement next = referenceLibraryElement;
    while (next != namespaceInTheReferenceLibrary) {
        pathToReferenceLibraryElement.addFirst(next);
        next = next.getNamespace();
    }
    return findNamedElement(namespaceInThePIM, pathToReferenceLibraryElement);
}

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From source file:org.codehaus.groovy.grails.commons.GrailsDomainConfigurationUtil.java

public static LinkedList<?> getSuperClassChain(Class<?> theClass) {
    LinkedList<Class<?>> classChain = new LinkedList<Class<?>>();
    Class<?> clazz = theClass;
    while (clazz != Object.class && clazz != null) {
        classChain.addFirst(clazz);
        clazz = clazz.getSuperclass();//  w ww.j  a  va 2s .  c o  m
    }
    return classChain;
}

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