nl.vpro.domain.api.jackson.page.RelationFacetListJson Maven / Gradle / Ivy

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Contains the objects used by the Frontend API, like forms and result objects
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package nl.vpro.domain.api.jackson.page;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.node.ArrayNode;

import nl.vpro.domain.api.page.PageSearch;
import nl.vpro.domain.api.page.RelationFacet;
import nl.vpro.domain.api.page.RelationFacetList;
import nl.vpro.domain.api.page.RelationSearch;

/**
 * @author Michiel Meeuwissen
 * @since 3.0
 */
public class RelationFacetListJson {
    private RelationFacetListJson() {
    }

    public static class Serializer extends JsonSerializer {
        @Override
        public void serialize(RelationFacetList facets, JsonGenerator jgen, SerializerProvider provider) throws IOException {
            if (facets.getFilter() != null || facets.getSubSearch() != null) {
                jgen.writeStartObject();
                if (facets.size() == 1) {
                    jgen.writeObjectField("value", facets.iterator().next());
                } else {
                    jgen.writeArrayFieldStart("value");
                    for (RelationFacet matcher : facets) {
                        jgen.writeObject(matcher);
                    }
                    jgen.writeEndArray();
                }
                if (facets.getFilter() != null) {
                    jgen.writeObjectField("filter", facets.getFilter());
                }
                if (facets.getSubSearch() != null) {
                    jgen.writeObjectField("subSearch", facets.getSubSearch());
                }
                jgen.writeEndObject();
            } else {
                if (facets.size() == 1) {
                    jgen.writeObject(facets.iterator().next());
                } else {
                    jgen.writeStartArray();
                    for (RelationFacet facet : facets.getFacets()) {
                        jgen.writeObject(facet);
                    }
                    jgen.writeEndArray();
                }
            }
        }
    }
    public static class Deserializer extends JsonDeserializer {

        @Override
        public RelationFacetList deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
            if(jp.getParsingContext().inObject()) {
                JsonNode jsonNode = jp.readValueAsTree();
                JsonNode m = jsonNode.get("value");
                if (m == null) {
                    List facets = new ArrayList<>();
                    RelationFacet facet = jp.getCodec().readValue(jsonNode.traverse(jp.getCodec()), RelationFacet.class);
                    facets.add(facet);
                    return new RelationFacetList(facets);
                } else {
                    List facets = new ArrayList<>();
                    if (m.isArray()) {
                        ArrayNode array = (ArrayNode) m;
                        for (JsonNode node : array) {
                            RelationFacet f = jp.getCodec().readValue(node.traverse(jp.getCodec()), RelationFacet.class);
                            facets.add(f);
                        }
                    } else {
                        facets.add(jp.getCodec().readValue(m.traverse(jp.getCodec()), RelationFacet.class));
                    }
                    RelationFacetList result = new RelationFacetList(facets);
                    JsonNode filter = jsonNode.get("filter");
                    if (filter != null) {
                        result.setFilter(jp.getCodec().readValue(filter.traverse(jp.getCodec()), PageSearch.class));
                    }
                    JsonNode subSearch = jsonNode.get("subSearch");
                    if (subSearch != null) {
                        result.setSubSearch(jp.getCodec().readValue(subSearch.traverse(jp.getCodec()), RelationSearch.class));
                    }
                    return result;

                }
            } else if(jp.getParsingContext().inArray()) {
                List list = new ArrayList<>();
                jp.clearCurrentToken();
                Iterator i = jp.readValuesAs(RelationFacet.class);
                while(i.hasNext()) {
                    list.add(i.next());
                }
                return new RelationFacetList(list);
            } else {
                throw new IllegalStateException();
            }
        }
    }
}