Example usage for java.util LinkedList isEmpty

Introduction

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

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this list contains no elements.

Usage

From source file:org.apache.hadoop.hbase.regionserver.CompactionPipeline.java

private boolean validateSuffixList(LinkedList<ImmutableSegment> suffix) {
    if (suffix.isEmpty()) {
        // empty suffix is always valid
        return true;
    }//from w w w.  j  a v a  2 s .c o m

    Iterator<ImmutableSegment> pipelineBackwardIterator = pipeline.descendingIterator();
    Iterator<ImmutableSegment> suffixBackwardIterator = suffix.descendingIterator();
    ImmutableSegment suffixCurrent;
    ImmutableSegment pipelineCurrent;
    for (; suffixBackwardIterator.hasNext();) {
        if (!pipelineBackwardIterator.hasNext()) {
            // a suffix longer than pipeline is invalid
            return false;
        }
        suffixCurrent = suffixBackwardIterator.next();
        pipelineCurrent = pipelineBackwardIterator.next();
        if (suffixCurrent != pipelineCurrent) {
            // non-matching suffix
            return false;
        }
    }
    // suffix matches pipeline suffix
    return true;
}

---

From source file:com.github.helenusdriver.commons.lang3.reflect.ReflectionUtils.java

/**
 * Gets all members of a given type (up the super class hierarchy) annotated
 * with the specified annotation./*from w ww . j a  v a2 s  .  co m*/
 *
 * @author paouelle
 *
 * @param <T> the type of members to retrieve (either {@link Field},
 *            {@link Method}, or {@link Constructor})
 *
 * @param  type the type of members to retrieve
 * @param  clazz the class from which to find all annotated members
 * @param  annotation the annotation for which to find all members
 * @param  up <code>true</code> to look up the class hierarchy;
 *         <code>false</code> to only look at the specified class level
 * @return a list in the provided order for all annotated members
 * @throws NullPointerException if <code>type</code>,
 *         <code>clazz</code> or <code>annotation</code> is <code>null</code>
 * @throws IllegalArgumentException if <code>type</code> is not
 *         {@link Field}, {@link Method}, or {@link Constructor}
 */
public static <T extends Member> List<T> getAllMembersAnnotatedWith(Class<T> type, Class<?> clazz,
        Class<? extends Annotation> annotation, boolean up) {
    org.apache.commons.lang3.Validate.notNull(type, "invalid null member type");
    org.apache.commons.lang3.Validate.notNull(clazz, "invalid null class");
    org.apache.commons.lang3.Validate.notNull(annotation, "invalid null annotation class");
    final LinkedList<Class<?>> classes = new LinkedList<>();

    if (up) {
        while (clazz != null) {
            classes.push(clazz);
            clazz = clazz.getSuperclass();
        }
    } else {
        classes.push(clazz);
    }
    final List<T> members = new ArrayList<>(12);

    while (!classes.isEmpty()) {
        clazz = classes.pop();
        for (final T m : ReflectionUtils.getDeclaredMembers(type, clazz)) {
            if ((m instanceof AnnotatedElement)
                    && ((AnnotatedElement) m).getAnnotationsByType(annotation).length > 0) {
                members.add(m);
            }
        }
    }
    return members;
}

---

From source file:com.adobe.acs.commons.mcp.impl.processes.asset.HierarchicalElement.java

@SuppressWarnings("squid:S00112")
default void visitAllFolders(CheckedConsumer<HierarchicalElement> visitor,
        CheckedFunction<HierarchicalElement, Stream<HierarchicalElement>> childFunction) throws Exception {
    LinkedList<HierarchicalElement> nodes = new LinkedList<>();
    nodes.add(this);
    while (!nodes.isEmpty()) {
        HierarchicalElement node = nodes.pop();
        childFunction.apply(node).forEach(nodes::add);
        visitor.accept(node);/*from   w ww  . j  a v a  2s . c  o  m*/
    }
}

---

From source file:com.adobe.acs.commons.mcp.impl.processes.asset.HierarchicalElement.java

@SuppressWarnings("squid:S00112")
default void visitAllFiles(CheckedConsumer<HierarchicalElement> visitor,
        CheckedFunction<HierarchicalElement, Stream<HierarchicalElement>> childFolderFunction,
        CheckedFunction<HierarchicalElement, Stream<HierarchicalElement>> childFileFunction) throws Exception {
    LinkedList<HierarchicalElement> nodes = new LinkedList<>();
    nodes.add(this);
    while (!nodes.isEmpty()) {
        HierarchicalElement node = nodes.pop();
        childFolderFunction.apply(node).forEach(nodes::add);
        for (HierarchicalElement child : childFileFunction.apply(node).collect(Collectors.toList())) {
            visitor.accept(child);/*from   w  w w. j a v a  2  s .  co m*/
        }
    }
}

---

From source file:org.tinygroup.jspengine.runtime.JspFactoryImpl.java

private PageContext internalGetPageContext(Servlet servlet, ServletRequest request, ServletResponse response,
        String errorPageURL, boolean needsSession, int bufferSize, boolean autoflush) {
    try {//  w w w .  j  ava  2s.  c  o m
        PageContext pc = null;
        if (USE_POOL) {
            LinkedList<PageContext> pcPool = (LinkedList<PageContext>) pool.get();
            if (!pcPool.isEmpty()) {
                pc = pcPool.removeFirst();
            }
            if (pc == null) {
                pc = new PageContextImpl(this);
            }
        } else {
            pc = new PageContextImpl(this);
        }
        pc.initialize(servlet, request, response, errorPageURL, needsSession, bufferSize, autoflush);
        return pc;
    } catch (Throwable ex) {
        /* FIXME: need to do something reasonable here!! */
        log.fatal("Exception initializing page context", ex);
        return null;
    }
}

---

From source file:com.github.helenusdriver.commons.lang3.reflect.ReflectionUtils.java

/**
 * Gets all members of a given type (up the super class hierarchy) annotated
 * with the specified annotation./*from w  ww .j av a2 s .  c  o  m*/
 *
 * @author paouelle
 *
 * @param <T> the type of members to retrieve (either {@link Field},
 *            {@link Method}, or {@link Constructor})
 * @param <A> the type of annotation to search for
 *
 * @param  type the type of members to retrieve
 * @param  clazz the class from which to find all annotated members
 * @param  annotation the annotation for which to find all members
 * @param  up <code>true</code> to look up the class hierarchy;
 *         <code>false</code> to only look at the specified class level
 * @return a non-<code>null</code> map in the provided order for all annotated
 *         members with their found annotations
 * @throws NullPointerException if <code>type</code>,
 *         <code>clazz</code> or <code>annotation</code> is <code>null</code>
 * @throws IllegalArgumentException if <code>type</code> is not
 *         {@link Field}, {@link Method}, or {@link Constructor}
 */
public static <T extends Member, A extends Annotation> Map<T, A[]> getAllAnnotationsForMembersAnnotatedWith(
        Class<T> type, Class<?> clazz, Class<A> annotation, boolean up) {
    org.apache.commons.lang3.Validate.notNull(type, "invalid null member type");
    org.apache.commons.lang3.Validate.notNull(clazz, "invalid null class");
    org.apache.commons.lang3.Validate.notNull(annotation, "invalid null annotation class");
    final LinkedList<Class<?>> classes = new LinkedList<>();

    if (up) {
        while (clazz != null) {
            classes.push(clazz);
            clazz = clazz.getSuperclass();
        }
    } else {
        classes.push(clazz);
    }
    final Map<T, A[]> members = new LinkedHashMap<>(12);

    while (!classes.isEmpty()) {
        clazz = classes.pop();
        for (final T m : ReflectionUtils.getDeclaredMembers(type, clazz)) {
            if (m instanceof AnnotatedElement) {
                final A[] as = ((AnnotatedElement) m).getAnnotationsByType(annotation);

                if (as.length > 0) {
                    members.put(m, as);
                }
            }
        }
    }
    return members;
}

---

From source file:com.espertech.esper.epl.core.ResultSetProcessorSimple.java

/**
 * Applies the select-clause to the given events returning the selected events. The number of events stays the
 * same, i.e. this method does not filter it just transforms the result set.
 * <p>//from w w w  .j a  va  2 s  .c o  m
 * Also applies a having clause.
 * @param exprProcessor - processes each input event and returns output event
 * @param events - input events
 * @param optionalHavingNode - supplies the having-clause expression
 * @param isNewData - indicates whether we are dealing with new data (istream) or old data (rstream)
 * @param isSynthesize - set to true to indicate that synthetic events are required for an iterator result set
 * @param exprEvaluatorContext context for expression evalauation
 * @return output events, one for each input event
 */
protected static EventBean[] getSelectEventsHaving(SelectExprProcessor exprProcessor,
        Set<MultiKey<EventBean>> events, ExprEvaluator optionalHavingNode, boolean isNewData,
        boolean isSynthesize, ExprEvaluatorContext exprEvaluatorContext) {
    LinkedList<EventBean> result = new LinkedList<EventBean>();

    for (MultiKey<EventBean> key : events) {
        EventBean[] eventsPerStream = key.getArray();

        Boolean passesHaving = (Boolean) optionalHavingNode.evaluate(eventsPerStream, isNewData,
                exprEvaluatorContext);
        if ((passesHaving == null) || (!passesHaving)) {
            continue;
        }

        EventBean resultEvent = exprProcessor.process(eventsPerStream, isNewData, isSynthesize,
                exprEvaluatorContext);
        result.add(resultEvent);
    }

    if (!result.isEmpty()) {
        return result.toArray(new EventBean[result.size()]);
    } else {
        return null;
    }
}

---

From source file:com.cyclopsgroup.waterview.web.RuntimeTreeNode.java

/**
 * Get node or child node by id//  w w  w  .  j av  a 2  s  . c om
 *
 * @param nodeId Node id
 * @return Node or null if not found
 */
public RuntimeTreeNode getNodeById(String nodeId) {
    LinkedList buffer = new LinkedList();
    buffer.addLast(this);
    while (!buffer.isEmpty()) {
        RuntimeTreeNode node = (RuntimeTreeNode) buffer.removeFirst();
        if (StringUtils.equals(nodeId, node.getNodeId())) {
            return node;
        }
        buffer.addAll(node.children.values());
    }
    return null;
}

---

From source file:org.apache.ddlutils.util.CallbackClosure.java

/**
 * {@inheritDoc}//  ww  w . jav a  2  s. co  m
 */
public void execute(Object obj) throws DdlUtilsException {
    LinkedList queue = new LinkedList();

    queue.add(obj.getClass());
    while (!queue.isEmpty()) {
        Class type = (Class) queue.removeFirst();
        Method callback = (Method) _callbacks.get(type);

        if (callback != null) {
            try {
                _parameters[_callbackTypePos] = obj;
                callback.invoke(_callee, _parameters);
                return;
            } catch (InvocationTargetException ex) {
                throw new DdlUtilsException(ex.getTargetException());
            } catch (IllegalAccessException ex) {
                throw new DdlUtilsException(ex);
            }
        }
        if ((type.getSuperclass() != null) && !type.getSuperclass().equals(Object.class)) {
            queue.add(type.getSuperclass());
        }

        Class[] baseInterfaces = type.getInterfaces();

        if (baseInterfaces != null) {
            for (int idx = 0; idx < baseInterfaces.length; idx++) {
                queue.add(baseInterfaces[idx]);
            }
        }
    }
}

---

From source file:org.jumpmind.db.util.CallbackClosure.java

/**
 * {@inheritDoc}/*from   w  w  w .j  a  v  a  2 s  . c o m*/
 */
public void execute(Object obj) throws DdlException {
    LinkedList queue = new LinkedList();

    queue.add(obj.getClass());
    while (!queue.isEmpty()) {
        Class type = (Class) queue.removeFirst();
        Method callback = (Method) _callbacks.get(type);

        if (callback != null) {
            try {
                _parameters[_callbackTypePos] = obj;
                callback.invoke(_callee, _parameters);
                return;
            } catch (InvocationTargetException ex) {
                throw new DdlException(ex.getTargetException());
            } catch (IllegalAccessException ex) {
                throw new DdlException(ex);
            }
        }
        if ((type.getSuperclass() != null) && !type.getSuperclass().equals(Object.class)) {
            queue.add(type.getSuperclass());
        }

        Class[] baseInterfaces = type.getInterfaces();

        if (baseInterfaces != null) {
            for (int idx = 0; idx < baseInterfaces.length; idx++) {
                queue.add(baseInterfaces[idx]);
            }
        }
    }
}

---

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