Examples with MapResult apoc.result.MapResult used on opensource projects

Example 1 with MapResult

use of apoc.result.MapResult in project neo4j-apoc-procedures by neo4j-contrib.

the class Json method toTree.

@Procedure("apoc.convert.toTree")
@Description("apoc.convert.toTree([paths],[lowerCaseRels=true]) creates a stream of nested documents representing the at least one root of these paths")
public // todo optinally provide root node
Stream<MapResult> toTree(@Name("paths") List<Path> paths, @Name(value = "lowerCaseRels", defaultValue = "true") boolean lowerCaseRels) {
    if (paths.isEmpty())
        return Stream.of(new MapResult(Collections.emptyMap()));
    Map<Long, Map<String, Object>> maps = new HashMap<>(paths.size() * 100);
    for (Path path : paths) {
        Iterator<PropertyContainer> it = path.iterator();
        while (it.hasNext()) {
            Node n = (Node) it.next();
            Map<String, Object> nMap = maps.computeIfAbsent(n.getId(), (id) -> toMap(n));
            if (it.hasNext()) {
                Relationship r = (Relationship) it.next();
                Node m = r.getOtherNode(n);
                Map<String, Object> mMap = maps.computeIfAbsent(m.getId(), (id) -> toMap(m));
                String typeName = r.getType().name();
                if (lowerCaseRels)
                    typeName = typeName.toLowerCase();
                mMap = addRelProperties(mMap, typeName, r);
                // parent-[:HAS_CHILD]->(child) vs. (parent)<-[:PARENT_OF]-(child)
                if (!nMap.containsKey(typeName))
                    nMap.put(typeName, new ArrayList<>(16));
                List list = (List) nMap.get(typeName);
                if (!list.contains(mMap))
                    // todo performance, use set instead and convert to map at the end?
                    list.add(mMap);
            }
        }
    }
    return paths.stream().map(Path::startNode).distinct().map(n -> maps.remove(n.getId())).map(m -> m == null ? Collections.<String, Object>emptyMap() : m).map(MapResult::new);
}

Example 2 with MapResult

use of apoc.result.MapResult in project neo4j-apoc-procedures by neo4j-contrib.

the class Xml method xmlXpathToMapResult.

private Stream<MapResult> xmlXpathToMapResult(@Name("url") String url, boolean simpleMode, String path, Map<String, Object> config) throws Exception {
    if (config == null)
        config = Collections.emptyMap();
    boolean failOnError = (boolean) config.getOrDefault("failOnError", true);
    List<MapResult> result = new ArrayList<>();
    try {
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        documentBuilderFactory.setNamespaceAware(true);
        documentBuilderFactory.setIgnoringElementContentWhitespace(true);
        DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
        FileUtils.checkReadAllowed(url);
        Document doc = documentBuilder.parse(Util.openInputStream(url, Collections.emptyMap(), null));
        XPathFactory xPathFactory = XPathFactory.newInstance();
        XPath xPath = xPathFactory.newXPath();
        path = StringUtils.isEmpty(path) ? "/" : path;
        XPathExpression xPathExpression = xPath.compile(path);
        NodeList nodeList = (NodeList) xPathExpression.evaluate(doc, XPathConstants.NODESET);
        for (int i = 0; i < nodeList.getLength(); i++) {
            final Deque<Map<String, Object>> stack = new LinkedList<>();
            handleNode(stack, nodeList.item(i), simpleMode);
            for (int index = 0; index < stack.size(); index++) {
                result.add(new MapResult(stack.pollFirst()));
            }
        }
    } catch (FileNotFoundException e) {
        if (!failOnError)
            return Stream.of(new MapResult(Collections.emptyMap()));
        else
            throw new FileNotFoundException(e.getMessage());
    } catch (Exception e) {
        if (!failOnError)
            return Stream.of(new MapResult(Collections.emptyMap()));
        else
            throw new Exception(e);
    }
    return result.stream();
}

Example 3 with MapResult

use of apoc.result.MapResult in project neo4j-apoc-procedures by neo4j-contrib.

the class LoadJson method loadJsonStream.

public static Stream<MapResult> loadJsonStream(@Name("url") String url, @Name("headers") Map<String, Object> headers, @Name("payload") String payload, String path, boolean failOnError) {
    headers = null != headers ? headers : new HashMap<>();
    headers.putAll(extractCredentialsIfNeeded(url, failOnError));
    Stream<Object> stream = JsonUtil.loadJson(url, headers, payload, path, failOnError);
    return stream.flatMap((value) -> {
        if (value instanceof Map) {
            return Stream.of(new MapResult((Map) value));
        }
        if (value instanceof List) {
            if (((List) value).isEmpty())
                return Stream.empty();
            if (((List) value).get(0) instanceof Map)
                return ((List) value).stream().map((v) -> new MapResult((Map) v));
            return Stream.of(new MapResult(Collections.singletonMap("result", value)));
        }
        if (!failOnError)
            throw new RuntimeException("Incompatible Type " + (value == null ? "null" : value.getClass()));
        else
            return Stream.of(new MapResult(Collections.emptyMap()));
    });
}

Example 4 with MapResult

use of apoc.result.MapResult in project neo4j-apoc-procedures by neo4j-contrib.

the class Xml method xmlToMapResult.

private Stream<MapResult> xmlToMapResult(@Name("url") String url, boolean simpleMode) {
    try {
        XMLStreamReader reader = getXMLStreamReaderFromUrl(url);
        final Deque<Map<String, Object>> stack = new LinkedList<>();
        do {
            handleXmlEvent(stack, reader, simpleMode);
        } while (proceedReader(reader));
        return Stream.of(new MapResult(stack.getFirst()));
    } catch (IOException | XMLStreamException e) {
        throw new RuntimeException("Can't read url " + cleanUrl(url) + " as XML", e);
    }
}

Example 5 with MapResult

use of apoc.result.MapResult in project neo4j-apoc-procedures by neo4j-contrib.

the class Meta method schema.

@Procedure
@Description("apoc.meta.schema  - examines a subset of the graph to provide a map-like meta information")
public Stream<MapResult> schema() {
    MetaStats metaStats = collectStats();
    Map<String, Map<String, MetaResult>> metaData = collectMetaData();
    Map<String, Object> relationships = collectRelationshipsMetaData(metaStats, metaData);
    Map<String, Object> nodes = collectNodesMetaData(metaStats, metaData, relationships);
    nodes.putAll(relationships);
    return Stream.of(new MapResult(nodes));
}