java.util.Collection#remove ( )源码实例Demo

@Test
public void whenTransformWithCollections2_thenTransformed() {
    final Function<String, Integer> function = new Function<String, Integer>() {
        @Override
        public final Integer apply(final String input) {
            return input.length();
        }
    };

    final List<String> names = Lists.newArrayList("John", "Jane", "Adam", "Tom");
    final Collection<Integer> result = Collections2.transform(names, function);

    assertEquals(4, result.size());
    assertThat(result, contains(4, 4, 4, 3));

    result.remove(3);
    assertEquals(3, names.size());
}
 

@Test
public void paperEx() {
    pds.addRule(normal(1, "n1", 1, "n2"));
    pds.addRule(normal(1, "n1", 1, "n3"));
    pds.addRule(push(1, "n2", 1, "n7", "n4"));
    pds.addRule(push(1, "n3", 1, "n7", "n5"));
    pds.addRule(normal(1, "n4", 1, "n6"));
    pds.addRule(normal(1, "n5", 1, "n6"));
    pds.addRule(normal(1, "n7", 1, "n8"));
    pds.addRule(pop(1, "n8", 1));
    PAutomaton<StackSymbol, Abstraction> fa = accepts(1, "n1");
    pds.poststar(fa);
    Collection<Transition<StackSymbol, Abstraction>> transitions = fa.getTransitions();
    transitions.remove(t(1, "n1", ACC));
    transitions.remove(t(1, "n2", ACC));
    transitions.remove(t(1, "n3", ACC));
    transitions.remove(t(1, "n4", ACC));
    transitions.remove(t(1, "n5", ACC));
    transitions.remove(t(1, "n6", ACC));
    transitions.remove(t(1, fa.epsilon(), a(1, "n7")));
    transitions.remove(t(1, "n7", a(1, "n7")));
    transitions.remove(t(1, "n8", a(1, "n7")));
    transitions.remove(t(a(1, "n7"), "n4", ACC));
    transitions.remove(t(a(1, "n7"), "n5", ACC));
    assertTrue(transitions.isEmpty());
}
 

/**
 * Disssociates a bunch of administrators from a server group
 * @param sg the server group to process
 * @param admins a collection of administrators to deassociate
 * @param loggedInUser the loggedInUser needed for credentials
 */
public void dissociateAdmins(ManagedServerGroup sg, Collection admins,
                                                User loggedInUser) {
    validateAccessCredentials(loggedInUser, sg, sg.getName());
    validateAdminCredentials(loggedInUser);

    Set adminSet = sg.getAssociatedAdminsFor(loggedInUser);
    processAdminList(sg, admins, loggedInUser);
    admins.remove(loggedInUser); //can't disassociate thyself.
    adminSet.removeAll(admins);
    ServerGroupFactory.save(sg);
    for (Iterator itr = admins.iterator(); itr.hasNext();) {
        User u = (User) itr.next();
        UserFactory.save(u);
    }
}
 

private static Collection<String> getPackages(FileObject root) {
    ClasspathInfo cpi = ClasspathInfo.create(root);
    // create CPI from just the single source root, to avoid packages from other
    // modules
    ClasspathInfo rootCpi = new ClasspathInfo.Builder(
            cpi.getClassPath(PathKind.BOOT)).
            setClassPath(cpi.getClassPath(PathKind.COMPILE)).
            setModuleSourcePath(cpi.getClassPath(PathKind.MODULE_SOURCE)).
            setModuleCompilePath(cpi.getClassPath(PathKind.MODULE_COMPILE)).
            setSourcePath(
                ClassPathSupport.createClassPath(root)
            ).build();
    
    Collection<String> pkgs = new HashSet<>(rootCpi.getClassIndex().getPackageNames("", false, 
            Collections.singleton(SearchScope.SOURCE)));
    pkgs.remove(""); // NOI18N
    return pkgs;
}
 

@Atomic
public ActionForward remove(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) {
    Party party = FenixFramework.getDomainObject(request.getParameter("provider"));
    Collection<Party> externalScholarshipProvider = Bennu.getInstance().getExternalScholarshipProviderSet();
    externalScholarshipProvider.remove(party);
    return redirect("/externalScholarshipProvider.do?method=list", request);
}
 

public boolean remove(K key, V value) {
	Collection<V> values = this.data.get(key);
	boolean removed = values != null && values.remove(value);
	if (removed && values.isEmpty()) {
		this.data.remove(key);
	}
	return removed;
}
 

/**
 * Finds all split work units in the input collection and merges the file parts into the expected output files.
 * @param fs {@link FileSystem} where file parts exist.
 * @param workUnits Collection of {@link WorkUnitState}s possibly containing split work units.
 * @return The collection of {@link WorkUnitState}s where split work units for each file have been merged.
 * @throws IOException
 */
public static Collection<WorkUnitState> mergeAllSplitWorkUnits(FileSystem fs, Collection<WorkUnitState> workUnits)
    throws IOException {
  ListMultimap<CopyableFile, WorkUnitState> splitWorkUnitsMap = ArrayListMultimap.create();
  for (WorkUnitState workUnit : workUnits) {
    if (isSplitWorkUnit(workUnit)) {
      CopyableFile copyableFile = (CopyableFile) CopySource.deserializeCopyEntity(workUnit);
      splitWorkUnitsMap.put(copyableFile, workUnit);
    }
  }

  for (CopyableFile file : splitWorkUnitsMap.keySet()) {
    log.info(String.format("Merging split file %s.", file.getDestination()));

    WorkUnitState oldWorkUnit = splitWorkUnitsMap.get(file).get(0);
    Path outputDir = FileAwareInputStreamDataWriter.getOutputDir(oldWorkUnit);
    CopyEntity.DatasetAndPartition datasetAndPartition =
        file.getDatasetAndPartition(CopySource.deserializeCopyableDataset(oldWorkUnit));
    Path parentPath = FileAwareInputStreamDataWriter.getOutputFilePath(file, outputDir, datasetAndPartition)
        .getParent();

    WorkUnitState newWorkUnit = mergeSplits(fs, file, splitWorkUnitsMap.get(file), parentPath);

    for (WorkUnitState wu : splitWorkUnitsMap.get(file)) {
      // Set to committed so that task states will not fail
      wu.setWorkingState(WorkUnitState.WorkingState.COMMITTED);
      workUnits.remove(wu);
    }
    workUnits.add(newWorkUnit);
  }
  return workUnits;
}
 

public void remove(K k, V v) {
    Collection<V> s = map.get(k);
    if (s != null) {
        s.remove(v);
        if (s.isEmpty()) {
            map.remove(k);
        }
    }
}
 

@Override
public void removeListener(EventListenerIF listener, String event) {
  synchronized (listeners) {
    if (listeners.containsKey(event)) {
      // Remove listener from list of event entry listeners. This is
      // not very elegant, but it works.
      Collection event_listeners = new ArrayList(Arrays.asList((Object[])listeners.get(event)));
      event_listeners.remove(listener);
      if (event_listeners.isEmpty())
        listeners.remove(event);
      else
        listeners.put(event, event_listeners.toArray());
    }
  }
}
 

private void removeDependency(final IBattle blocked, final IBattle blocking) {
  final Collection<IBattle> dependencies = this.dependencies.get(blocked);
  dependencies.remove(blocking);
  if (dependencies.isEmpty()) {
    this.dependencies.remove(blocked);
  }
}
 

/**
 * Check if the given matchers can be matched to unique children.
 * Caution: this only checks that each given matcher can be matched onto a unique child; there may be children
 * that are not matched by any matcher, and this check will still pass!
 */
@Override
public boolean matchesSafely(@Nonnull RecordQueryPlan plan) {
    Collection<Matcher<RecordQueryPlan>> remaining = new HashSet<>(childMatchers);
    for (RecordQueryPlan child : plan.getChildren()) {
        for (Matcher<RecordQueryPlan> matcher : remaining) {
            if (matcher.matches(child)) {
                remaining.remove(matcher);
                break;
            }
        }
    }
    return remaining.isEmpty();
}
 

private void updateRelations(T source, Collection<J> targetIds, String fieldName, QueryContext queryContext, boolean add) {
    ResourceInformation sourceInformation = context.getSourceEntry().getResourceInformation();

    ResourceField field = sourceInformation.findFieldByUnderlyingName(fieldName);
    PreconditionUtil.verify(field != null, "field not found: %s.%s", sourceInformation.getResourceType(), fieldName);
    RegistryEntry targetEntry = context.getTargetEntry(field);
    ResourceField oppositeField = getOppositeField(field);
    ResourceFieldAccessor oppositeAccessor = oppositeField.getAccessor();
    ResourceRepositoryAdapter targetRepository = targetEntry.getResourceRepository();

    QueryAdapter queryAdapter = context.createEmptyQueryAdapter(targetEntry, queryContext);

    Collection<Object> targets = context.findAll(targetEntry, targetIds, queryContext);
    for (Object target : targets) {
        // in contract to SetOwnerStrategy no need to honor idAccessor since source already loaded
        if (oppositeField.isCollection()) {
            Collection oppositeElements = (Collection) oppositeAccessor.getValue(target);
            if (add) {
                oppositeElements.add(source);
            } else {
                oppositeElements.remove(source);
            }
            targetRepository.update(target, queryAdapter);
        } else {
            oppositeAccessor.setValue(target, add ? source : null);
            targetRepository.update(target, queryAdapter);
        }
    }
}
 

@Advice.OnMethodEnter
static void enter(@Advice.This Object self, @FieldValue Object field, @MappedBy String mappedBy) {
	if ( field != null && Hibernate.isPropertyInitialized( field, mappedBy ) ) {
		Collection<?> c = getter( field );
		if ( c != null ) {
			c.remove( self );
		}
	}
}
 

@Override
public boolean removeAll(Collection<?> c) {
	boolean result = false;
	for (Object o : c) {
		result |= c.remove(o);
	}
	return result;
}
 

private List<Factor> sumOut(final String var, final List<Factor> factors) throws InterruptedException {

		/* determine which factors will be eliminated and which stay */
		List<Factor> newFactors = new ArrayList<>();
		List<Factor> eliminatedFactors = new ArrayList<>();
		for (Factor f : factors) {
			if (!f.subDistribution.getVariables().contains(var)) {
				newFactors.add(f);
			} else {
				eliminatedFactors.add(f);
			}
		}

		/* first build point-wise product of distributions */
		DiscreteProbabilityDistribution productDistribution = eliminatedFactors.size() > 1 ? this.multiply(eliminatedFactors) : eliminatedFactors.get(0).subDistribution;

		/* compute distribution for elimination factor */
		DiscreteProbabilityDistribution distOfNewFactor = new DiscreteProbabilityDistribution();
		Collection<String> remainingVariablesInFactor = productDistribution.getVariables();
		remainingVariablesInFactor.remove(var);
		Collection<Collection<String>> entriesInReducedFactor = SetUtil.powerset(remainingVariablesInFactor);
		for (Collection<String> entry : entriesInReducedFactor) {
			Set<String> event = new HashSet<>(entry);
			double probForEventWithVariableIsNegative = productDistribution.getProbabilities().get(event);
			event.add(var);
			double probForEventWithVariableIsPositive = productDistribution.getProbabilities().get(event);
			event.remove(var);
			distOfNewFactor.addProbability(event, probForEventWithVariableIsNegative + probForEventWithVariableIsPositive);
		}
		newFactors.add(new Factor(distOfNewFactor));
		return newFactors;
	}
 

/**
 * Remove any instances of the given type from the collection.
 */
private static void removeInstancesOf(final Class<?> type, final Collection<?> collection) {
  for (Object o : collection) {
    if (type.isInstance(o)) {
      collection.remove(o); // ResteasyProviderFactory's collections are all concurrent, so this is safe
    }
  }
}
 

/**
 * Reduce the provided exclusions as much as possible by removing the source or
 * target vertex of lower contextual grade.
 * <p>
 * Strategy is as follows:
 * <ol>
 * <li>Pick up among all current exclusions the one whose high inter has the highest contextual
 * grade contribution among all exclusions,</li>
 * <li>Remove the weaker inter in this chosen exclusion relation,</li>
 * <li>Recompute all impacted contextual grades values,</li>
 * <li>Iterate until no more exclusion is left.</li>
 * </ol>
 *
 * @param exclusions the collection of exclusions to process
 * @return the set of vertices removed
 */
public Set<Inter> reduceExclusions (Collection<? extends Relation> exclusions)
{
    final Set<Inter> removed = new LinkedHashSet<>();
    Relation bestRel;

    do {
        // Choose exclusion with the highest source or target grade
        double bestCP = 0;
        bestRel = null;

        for (Iterator<? extends Relation> it = exclusions.iterator(); it.hasNext();) {
            Relation rel = it.next();

            if (containsEdge(rel)) {
                final double cp = Math.max(
                        getEdgeSource(rel).getBestGrade(),
                        getEdgeTarget(rel).getBestGrade());

                if (bestCP < cp) {
                    bestCP = cp;
                    bestRel = rel;
                }
            } else {
                it.remove();
            }
        }

        // Remove the weaker branch of the selected exclusion
        if (bestRel != null) {
            final Inter source = getEdgeSource(bestRel);
            final double scp = source.getBestGrade();
            final Inter target = getEdgeTarget(bestRel);
            final double tcp = target.getBestGrade();
            final Inter weaker = (scp < tcp) ? source : target;

            if (weaker.isVip()) {
                logger.info(
                        "VIP conflict {} deleting weaker {}",
                        bestRel.toLongString(this),
                        weaker);
            }

            // Which inters were involved in some support relation with this weaker inter?
            final Set<Inter> involved = involvedInters(getSupports(weaker));
            involved.remove(weaker);

            final Set<Inter> weakerEnsembles = weaker.getAllEnsembles(); // Before weaker is deleted!

            // Remove the weaker inter
            removed.add(weaker);
            weaker.remove();

            // If removal of weaker has resulted in removal of an ensemble, count this ensemble
            for (Inter ensemble : weakerEnsembles) {
                if (ensemble.isRemoved()) {
                    removed.add(ensemble);
                }
            }

            // Update contextual values for all inters that were involved with 'weaker'
            for (Inter inter : involved) {
                computeContextualGrade(inter);
            }

            exclusions.remove(bestRel);
        }
    } while (bestRel != null);

    return removed;
}
 

/**
 * Creates a date using the calendar date format. Specification reference:
 * 5.2.1.
 *
 * @param bld       the builder
 * @param fields    the fields
 * @param extended  true to use extended format
 * @param strictISO true to only allow ISO formats
 * @return true if reduced precision
 * @since 1.1
 */
private static boolean dateByMonth(DateTimeFormatterBuilder bld, Collection<DateTimeFieldType> fields,
        boolean extended, boolean strictISO) {

    boolean reducedPrec = false;
    if (fields.remove(DateTimeFieldType.year())) {
        bld.append(Constants.YE);
        if (fields.remove(DateTimeFieldType.monthOfYear())) {
            if (fields.remove(DateTimeFieldType.dayOfMonth())) {
                // YYYY-MM-DD/YYYYMMDD
                appendSeparator(bld, extended);
                bld.appendMonthOfYear(2);
                appendSeparator(bld, extended);
                bld.appendDayOfMonth(2);
            } else {
                // YYYY-MM/YYYY-MM
                bld.appendLiteral('-');
                bld.appendMonthOfYear(2);
                reducedPrec = true;
            }
        } else {
            if (fields.remove(DateTimeFieldType.dayOfMonth())) {
                // YYYY--DD/YYYY--DD (non-iso)
                checkNotStrictISO(fields, strictISO);
                bld.appendLiteral('-');
                bld.appendLiteral('-');
                bld.appendDayOfMonth(2);
            } else {
                // YYYY/YYYY
                reducedPrec = true;
            }
        }

    } else if (fields.remove(DateTimeFieldType.monthOfYear())) {
        bld.appendLiteral('-');
        bld.appendLiteral('-');
        bld.appendMonthOfYear(2);
        if (fields.remove(DateTimeFieldType.dayOfMonth())) {
            // --MM-DD/--MMDD
            appendSeparator(bld, extended);
            bld.appendDayOfMonth(2);
        } else {
            // --MM/--MM
            reducedPrec = true;
        }
    } else if (fields.remove(DateTimeFieldType.dayOfMonth())) {
        // ---DD/---DD
        bld.appendLiteral('-');
        bld.appendLiteral('-');
        bld.appendLiteral('-');
        bld.appendDayOfMonth(2);
    }
    return reducedPrec;
}
 

@CanIgnoreReturnValue
@Override
public boolean remove(@Nullable Object key, @Nullable Object value) {
  Collection<V> collection = asMap().get(key);
  return collection != null && collection.remove(value);
}
 

@Transactional(rollbackOn = {Exception.class})
public BankOrder mergeBankOrders(Collection<BankOrder> bankOrders) throws AxelorException {

  if (bankOrders == null || bankOrders.size() <= 1) {
    throw new AxelorException(
        TraceBackRepository.CATEGORY_INCONSISTENCY,
        IExceptionMessage.BANK_ORDER_MERGE_AT_LEAST_TWO_BANK_ORDERS);
  }

  this.checkSameElements(bankOrders);

  BankOrder bankOrder = bankOrders.iterator().next();

  bankOrders.remove(bankOrder);

  bankOrder.setSenderLabel(null);
  bankOrder.setSenderReference(null);
  bankOrder.setBankOrderDate(Beans.get(AppBaseService.class).getTodayDate());
  bankOrder.setSignatoryUser(null);
  bankOrder.setSignatoryEbicsUser(null);

  PaymentMode paymentMode = bankOrder.getPaymentMode();

  for (BankOrderLine bankOrderLine : this.getAllBankOrderLineList(bankOrders)) {

    bankOrder.addBankOrderLineListItem(bankOrderLine);
  }

  bankOrderRepo.save(bankOrder);

  for (BankOrder bankOrderToRemove : bankOrders) {

    bankOrderToRemove = bankOrderRepo.find(bankOrderToRemove.getId());

    List<InvoicePayment> invoicePaymentList =
        invoicePaymentRepo.findByBankOrder(bankOrderToRemove).fetch();

    for (InvoicePayment invoicePayment : invoicePaymentList) {

      invoicePayment.setBankOrder(bankOrder);
    }

    bankOrderRepo.remove(bankOrderToRemove);
  }

  if (paymentMode.getConsoBankOrderLinePerPartner()) {

    consolidatePerPartner(bankOrder);
  }

  bankOrderService.updateTotalAmounts(bankOrder);

  return bankOrderRepo.save(bankOrder);
}