Example usage for java.util Objects isNull

Introduction

In this page you can find the example usage for java.util Objects isNull.

Prototype

public static boolean isNull(Object obj)

Source Link

Document

Returns true if the provided reference is null otherwise returns false .

Usage

From source file:org.kitodo.production.metadata.MetadataProcessor.java

private List<LegacyDocStructHelperInterface> getStructureElements(LegacyDocStructHelperInterface docStruct) {
    List<LegacyDocStructHelperInterface> docStructElements = new LinkedList<>();
    if (Objects.nonNull(docStruct)) {
        docStructElements.add(docStruct);
        if (Objects.nonNull(docStruct.getAllChildren())) {
            for (LegacyDocStructHelperInterface element : docStruct.getAllChildren()) {
                if (Objects.nonNull(element)) {
                    if (Objects.isNull(element.getAllChildren()) || element.getAllChildren().isEmpty()) {
                        docStructElements.add(element);
                    } else {
                        docStructElements.addAll(getStructureElements(element));
                    }/*  ww  w . ja va  2  s . c  o m*/
                }
            }
        }
    }
    return docStructElements;
}

From source file:org.kitodo.production.metadata.MetadataProcessor.java

private List<SelectItem> getAllowedItems(String itemType) {
    List<Locale.LanguageRange> priorityList = Locale.LanguageRange
            .parse(ServiceManager.getUserService().getAuthenticatedUser().getMetadataLanguage());

    if (Objects.isNull(this.selectedTreeNode)
            || !(this.selectedTreeNode.getData() instanceof IncludedStructuralElement)) {
        Helper.setErrorMessage("TreeNode data does not contain structure element!");
        return Collections.emptyList();
    }// w  w  w. j a v a2s .c o m

    IncludedStructuralElement includedStructuralElement = (IncludedStructuralElement) this.selectedTreeNode
            .getData();
    StructuralElementViewInterface structuralElementView = rulesetManagement
            .getStructuralElementView(includedStructuralElement.getType(), "", priorityList);

    if (itemType.equals(METADATA)) {
        Map<Metadata, String> metadataEntriesMappedToKeyNames = includedStructuralElement.getMetadata()
                .parallelStream().collect(Collectors.toMap(Function.identity(), Metadata::getKey));
        return structuralElementView
                .getAddableMetadata(metadataEntriesMappedToKeyNames, Collections.emptyList()).stream()
                .map(e -> new SelectItem(e.getId(), e.getLabel())).collect(Collectors.toList());
    } else if (itemType.equals(STRUCTURE_ELEMENT)) {
        Map<String, String> structureElements = structuralElementView.getAllowedSubstructuralElements();
        return structureElements.entrySet().stream().map(e -> new SelectItem(e.getKey(), e.getValue()))
                .collect(Collectors.toList());
    } else {
        return Collections.emptyList();
    }
}