001/*
002 * (C) Copyright 2018 Nuxeo (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Funsho David
018 */
019
020package org.nuxeo.ecm.core.bulk.io;
021
022import java.io.IOException;
023import java.io.Serializable;
024import java.util.ArrayList;
025import java.util.Collections;
026import java.util.HashMap;
027import java.util.Map;
028import java.util.stream.Collectors;
029import java.util.stream.StreamSupport;
030
031import org.apache.commons.lang3.StringUtils;
032import org.nuxeo.ecm.core.api.NuxeoException;
033
034import com.fasterxml.jackson.databind.JsonNode;
035import com.fasterxml.jackson.databind.ObjectMapper;
036
037/**
038 * @since 10.3
039 */
040public class BulkParameters {
041
042    protected static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
043
044    private BulkParameters() {
045        // utility class
046    }
047
048    public static Map<String, Serializable> paramsToMap(String jsonParams) throws IOException {
049        if (StringUtils.isBlank(jsonParams)) {
050            return Collections.emptyMap();
051        }
052        return paramsToMap(OBJECT_MAPPER.readTree(jsonParams));
053    }
054
055    public static HashMap<String, Serializable> paramsToMap(JsonNode node) {
056        // we declare variable and method return type as HashMap to be compliant with Serializable in params map
057        HashMap<String, Serializable> params = new HashMap<>();
058        if (node == null) {
059            return params;
060        }
061        Iterable<Map.Entry<String, JsonNode>> paramNodes = node::fields;
062        for (Map.Entry<String, JsonNode> paramNode : paramNodes) {
063            params.put(paramNode.getKey(), toSerializable(paramNode.getValue()));
064        }
065        return params;
066    }
067
068    protected static ArrayList<Serializable> toList(JsonNode value) {
069        // we declare method return type as ArrayList to be compliant with Serializable in params map
070        // spliterator calls iterator which is a bridge method of JsonNode#elements
071        return StreamSupport.stream(value.spliterator(), false)
072                            .map(BulkParameters::toSerializable)
073                            .collect(Collectors.toCollection(ArrayList::new));
074    }
075
076    protected static Serializable toSerializable(JsonNode value) {
077        Serializable serializableValue;
078        switch (value.getNodeType()) {
079        case STRING:
080        case BINARY: // binary will be converted to base64
081            serializableValue = value.asText();
082            break;
083        case BOOLEAN:
084            serializableValue = value.asBoolean();
085            break;
086        case NUMBER:
087            serializableValue = value.asLong();
088            break;
089        case ARRAY:
090            serializableValue = toList(value);
091            break;
092        case OBJECT:
093            serializableValue = paramsToMap(value);
094            break;
095        default:
096            throw new NuxeoException("Node type=" + value.getNodeType() + " is not supported");
097        }
098        return serializableValue;
099    }
100}