Example usage for java.util Collection clear

Introduction

In this page you can find the example usage for java.util Collection clear.

Prototype

void clear();

Source Link

Document

Removes all of the elements from this collection (optional operation).

Usage

From source file:ru.asmsoft.p2p.storage.MemoryMessageRepository.java

@Override
public void syncDb(long dbVersion, Collection<P2PMessage> messages) {
    messages.clear();
    messages.addAll(messages);/*from  w  ww .ja v  a2s.c om*/
    version = dbVersion;
}

From source file:de.iew.web.isc.DSResponseCollection.java

public Collection getClearedDataStore() {
    Collection existingData = getCollectionData();
    existingData.clear();
    return existingData;
}

From source file:com.hs.mail.imap.event.EventTracker.java

private void clear(Collection<Long> uids) {
    if (uids != null) {
        uids.clear();
    }
}

From source file:org.apache.isis.core.progmodel.facets.collections.collection.JavaCollectionFacet.java

@Override
public void init(final ObjectAdapter collection, final ObjectAdapter[] initData) {
    final Collection<? super Object> javaCollection = collectionOfUnderlying(collection);
    javaCollection.clear();
    for (final ObjectAdapter element : initData) {
        final Object pojo = element.getObject();
        javaCollection.add(pojo);//from  ww  w.  j  a v  a  2 s. c o  m
    }
}

From source file:org.kuali.student.enrollment.class2.courseoffering.util.CourseOfferingViewHelperUtil.java

public static OfferingInstructorInfo findDisplayInstructor(List<OfferingInstructorInfo> instructors) {
    OfferingInstructorInfo result = null;

    if (instructors != null && !instructors.isEmpty()) {

        // Build the display name for the Instructor
        Collection<OfferingInstructorInfo> highestInstEffortInstructors = new ArrayList<OfferingInstructorInfo>();
        float highestInstEffortComparison = 0f;

        for (OfferingInstructorInfo instructor : instructors) {
            if (instructor.getPercentageEffort() != null) {
                // if this instructor has a higher percent effort than any previous instructors,
                // clear the list we are keeping track of and set the new comparison number to this instructor's percentage effort
                if (instructor.getPercentageEffort() > highestInstEffortComparison) {
                    highestInstEffortInstructors.clear();
                    highestInstEffortComparison = instructor.getPercentageEffort();
                    highestInstEffortInstructors.add(instructor);
                }/*  www  .ja  va2  s.c om*/
                // if this instructor's percent effort is tied with the comparison number,
                // add this instructor to the list of highest effort instructors
                else if (instructor.getPercentageEffort() == highestInstEffortComparison) {
                    highestInstEffortInstructors.add(instructor);
                }
            }
        }

        if (highestInstEffortInstructors.size() == 1) {
            result = highestInstEffortInstructors.iterator().next();
        } else {
            List<String> names = new ArrayList<String>(highestInstEffortInstructors.size());
            Map<String, OfferingInstructorInfo> nameMap = new HashMap<String, OfferingInstructorInfo>(
                    highestInstEffortInstructors.size());
            for (OfferingInstructorInfo oiInfo : highestInstEffortInstructors) {
                names.add(oiInfo.getPersonName());
                nameMap.put(oiInfo.getPersonName(), oiInfo);
            }

            Collections.sort(names);
            int firstName = 0;
            result = nameMap.get(names.get(firstName));
        }
    }

    return result;
}

From source file:com.sworddance.util.CUtilities.java

/**
 * conceptually equivalent to masterCollection.clear(); masterCollection.addAll(newValues);
 *
 * except that the masterCollection is only modified to the extent needed to bring it into compliance.
 * Useful for avoiding unnecessary db operations.
 * compare the values in the newValues Collection to the masterCollection.
 * @param <T>/*from ww  w  .  j a v a  2  s.c om*/
 * @param masterCollection
 * @param newValues
 * @return true if a change was made
 */
public static <T> boolean updateCollectionAsNeeded(Collection<T> masterCollection, Collection<T> newValues) {
    boolean changed = false;
    // avoid updating with self.
    if (masterCollection != newValues) {
        if (isEmpty(newValues)) {
            if (isNotEmpty(masterCollection)) {
                masterCollection.clear();
                changed = true;
            }
        } else {
            // may be copying directly from another envelope
            List<T> remainingValues = new ArrayList<T>(newValues);
            // remove topics that are no longer present.
            for (Iterator<T> iterator = masterCollection.iterator(); iterator.hasNext();) {
                T existingObjectInMasterCollection = iterator.next();
                if (!remainingValues.contains(existingObjectInMasterCollection)) {
                    iterator.remove();
                    changed = true;
                } else {
                    remainingValues.remove(existingObjectInMasterCollection);
                }
            }
            // add any remaining objects that are actually new.
            masterCollection.addAll(remainingValues);
            changed = changed || !remainingValues.isEmpty();
        }
    }
    return changed;
}

From source file:org.vulpe.commons.util.VulpeReflectUtil.java

/**
 * Copy attributes from <code>origin</code> to <code>destination</code>.
 *
 * @param destination/* w  w w .  j a  va 2 s.  c o m*/
 * @param origin
 * @param ignoreTransient
 */
public static void copy(final Object destination, final Object origin, boolean ignoreTransient) {
    final List<Field> fields = getFields(origin.getClass());
    for (final Field field : fields) {
        if (ignoreTransient && Modifier.isTransient(field.getModifiers())) {
            continue;
        }
        try {
            final Object value = PropertyUtils.getProperty(origin, field.getName());
            if (Collection.class.isAssignableFrom(field.getType())) {
                final Collection valueDes = (Collection) PropertyUtils.getProperty(destination,
                        field.getName());
                if (value == null) {
                    if (valueDes != null) {
                        valueDes.clear();
                    }
                } else {
                    if (valueDes == null) {
                        PropertyUtils.setProperty(destination, field.getName(), value);
                    } else {
                        valueDes.clear();
                        valueDes.addAll((Collection) value);
                    }
                }
            } else {
                PropertyUtils.setProperty(destination, field.getName(), value);
            }
        } catch (NoSuchMethodException e) {
            LOG.debug("Method not found.", e);
        } catch (Exception e) {
            throw new VulpeSystemException(e);
        }
    }
}

From source file:org.vulpe.commons.util.VulpeReflectUtil.java

/**
 * Copy transient attributes from <code>origin</code> to
 * <code>destination</code>.
 *
 * @param destination//from w w w  . j  a  va  2s  .  c o  m
 * @param origin
 */
public static void copyOnlyTransient(final Object destination, final Object origin) {
    final List<Field> fields = getFields(origin.getClass());
    for (final Field field : fields) {
        if (!Modifier.isTransient(field.getModifiers())) {
            continue;
        }
        try {
            final Object value = PropertyUtils.getProperty(origin, field.getName());
            if (Collection.class.isAssignableFrom(field.getType())) {
                final Collection valueDes = (Collection) PropertyUtils.getProperty(destination,
                        field.getName());
                if (value == null) {
                    if (valueDes != null) {
                        valueDes.clear();
                    }
                } else {
                    if (valueDes == null) {
                        PropertyUtils.setProperty(destination, field.getName(), value);
                    } else {
                        valueDes.clear();
                        valueDes.addAll((Collection) value);
                    }
                }
            } else {
                PropertyUtils.setProperty(destination, field.getName(), value);
            }
        } catch (NoSuchMethodException e) {
            LOG.debug("Method not found.", e);
        } catch (Exception e) {
            throw new VulpeSystemException(e);
        }
    }
}

From source file:org.vaadin.tori.util.ToriScheduler.java

private void executeCommands(final Collection<ScheduledCommand> commands) {
    final Collection<ScheduledCommand> executableCommands = new ArrayList<ScheduledCommand>(commands);
    commands.clear();

    for (ScheduledCommand command : executableCommands) {
        try {//from   ww w  .  ja  v  a 2 s.  co m
            command.execute();
        } catch (RuntimeException e) {
            e.printStackTrace();
        }
    }
}

From source file:org.squashtest.tm.service.internal.customfield.CustomFieldHelperImpl.java

private <Y> void retainUniques(Collection<Y> argument) {
    Set<Y> set = new LinkedHashSet<>(argument);
    argument.clear();
    argument.addAll(set);/*from  w  w  w .j  ava2 s. c o  m*/
}