Examples with ElementMapping com.baidu.hugegraph.loader.mapping.ElementMapping used on opensource projects

Example 1 with ElementMapping

use of com.baidu.hugegraph.loader.mapping.ElementMapping in project incubator-hugegraph-toolchain by apache.

the class ElementBuilder method retainField.

/**
 * Retain only the key-value pairs needed by the current vertex or edge
 */
protected boolean retainField(String fieldName, Object fieldValue) {
    ElementMapping mapping = this.mapping();
    Set<String> selectedFields = mapping.selectedFields();
    Set<String> ignoredFields = mapping.ignoredFields();
    // Retain selected fields or remove ignored fields
    if (!selectedFields.isEmpty() && !selectedFields.contains(fieldName)) {
        return false;
    }
    if (!ignoredFields.isEmpty() && ignoredFields.contains(fieldName)) {
        return false;
    }
    String mappedKey = mapping.mappingField(fieldName);
    Set<String> nullableKeys = this.schemaLabel().nullableKeys();
    Set<Object> nullValues = mapping.nullValues();
    if (nullableKeys.isEmpty() || nullValues.isEmpty()) {
        return true;
    }
    return !nullableKeys.contains(mappedKey) || !nullValues.contains(fieldValue);
}

Example 2 with ElementMapping

use of com.baidu.hugegraph.loader.mapping.ElementMapping in project incubator-hugegraph-toolchain by apache.

the class MappingUtil method parseV1.

private static LoadMapping parseV1(String json) {
    GraphStructV1 graphStruct = JsonUtil.fromJson(json, GraphStructV1.class);
    Map<FileSourceKey, InputStruct> fileSourceInputStructs = InsertionOrderUtil.newMap();
    List<InputStruct> jdbcSourceInputStructs = new ArrayList<>();
    for (ElementStructV1 originStruct : graphStruct.structs()) {
        InputSource inputSource = originStruct.input();
        ElementMapping targetStruct = convertV1ToV2(originStruct);
        SourceType type = inputSource.type();
        if (type == SourceType.FILE || type == SourceType.HDFS) {
            FileSource source = (FileSource) inputSource;
            FileSourceKey key = new FileSourceKey(type, source.path());
            fileSourceInputStructs.compute(key, (k, inputStruct) -> {
                if (inputStruct == null) {
                    inputStruct = new InputStruct(null, null);
                    inputStruct.input(source);
                }
                inputStruct.add(targetStruct);
                return inputStruct;
            });
        } else {
            assert type == SourceType.JDBC;
            InputStruct inputStruct = new InputStruct(null, null);
            inputStruct.input(inputSource);
            inputStruct.add(targetStruct);
            jdbcSourceInputStructs.add(inputStruct);
        }
    }
    // Generate id for every input mapping
    List<InputStruct> inputStructs = new ArrayList<>();
    int id = 0;
    for (InputStruct inputStruct : fileSourceInputStructs.values()) {
        inputStruct.id(String.valueOf(++id));
        inputStructs.add(inputStruct);
    }
    for (InputStruct inputStruct : jdbcSourceInputStructs) {
        inputStruct.id(String.valueOf(++id));
        inputStructs.add(inputStruct);
    }
    return new LoadMapping(inputStructs);
}

Example 3 with ElementMapping

use of com.baidu.hugegraph.loader.mapping.ElementMapping in project incubator-hugegraph-toolchain by apache.

the class MappingUtil method convertV1ToV2.

private static ElementMapping convertV1ToV2(ElementStructV1 origin) {
    ElementMapping target;
    if (origin.type().isVertex()) {
        VertexStructV1 originVertex = (VertexStructV1) origin;
        target = new VertexMapping(originVertex.idField(), originVertex.unfold());
    } else {
        EdgeStructV1 originEdge = (EdgeStructV1) origin;
        target = new EdgeMapping(originEdge.sourceFields(), originEdge.unfoldSource(), originEdge.targetFields(), originEdge.unfoldTarget());
    }
    fill(origin, target);
    return target;
}

Example 4 with ElementMapping

use of com.baidu.hugegraph.loader.mapping.ElementMapping in project incubator-hugegraph-toolchain by apache.

the class ParseTaskBuilder method buildTask.

private ParseTask buildTask(ElementBuilder builder, List<Line> lines) {
    final LoadMetrics metrics = this.context.summary().metrics(this.struct);
    final int batchSize = this.context.options().batchSize;
    final ElementMapping mapping = builder.mapping();
    final boolean needRemoveId = builder instanceof VertexBuilder && ((VertexLabel) builder.schemaLabel()).idStrategy().isPrimaryKey();
    return new ParseTask(mapping, () -> {
        List<List<Record>> batches = new ArrayList<>();
        // One batch record
        List<Record> records = new ArrayList<>(batchSize);
        int count = 0;
        for (Line line : lines) {
            try {
                // NOTE: don't remove entry in keyValues
                @SuppressWarnings("unchecked") List<GraphElement> elements = builder.build(line.names(), line.values());
                E.checkState(elements.size() <= batchSize, "The number of columns in a line cannot " + "exceed the size of a batch, but got %s > %s", elements.size(), batchSize);
                // Prevent batch size from exceeding limit
                if (records.size() + elements.size() > batchSize) {
                    LOG.debug("Create a new batch for {}", mapping);
                    // Add current batch and create a new batch
                    batches.add(records);
                    records = new ArrayList<>(batchSize);
                }
                for (GraphElement element : elements) {
                    if (needRemoveId) {
                        ((Vertex) element).id(null);
                    }
                    records.add(new Record(line.rawLine(), element));
                    count++;
                }
            } catch (IllegalArgumentException e) {
                metrics.increaseParseFailure(mapping);
                ParseException pe = new ParseException(line.rawLine(), e);
                this.handleParseFailure(mapping, pe);
            }
        }
        if (!records.isEmpty()) {
            batches.add(records);
        }
        metrics.plusParseSuccess(mapping, count);
        return batches;
    });
}