io.sphere.sdk.attributes.AttributeDefinitionDeserializer Maven / Gradle / Ivy
package io.sphere.sdk.attributes;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import io.sphere.sdk.utils.ImmutableMapBuilder;
import io.sphere.sdk.utils.JsonUtils;
import java.io.IOException;
import java.util.Map;
import static io.sphere.sdk.utils.MapUtils.getOrThrow;
class AttributeDefinitionDeserializer extends JsonDeserializer {
private static final Map> nameClassMap =
ImmutableMapBuilder.>of().
put("text", TextAttributeDefinition.class).
put("ltext", LocalizedTextAttributeDefinition.class).
put("enum", EnumAttributeDefinition.class).
put("lenum", LocalizedEnumAttributeDefinition.class).
put("number", NumberAttributeDefinition.class).
put("money", MoneyAttributeDefinition.class).
put("time", TimeAttributeDefinition.class).
put("date", DateAttributeDefinition.class).
put("datetime", DateTimeAttributeDefinition.class).
put("boolean", BooleanAttributeDefinition.class).
put("set", SetAttributeDefinition.class).
put("reference", ReferenceAttributeDefinition.class).
build();
@Override
public AttributeDefinition deserialize(final JsonParser jsonParser, final DeserializationContext context) throws IOException {
final JsonNode jsonNode = jsonParser.readValueAsTree();
final String name = extractNameFromJson(jsonNode);
final Class clazz = findClassForTypeName(name);
//the jsonParser is not reusable after reading a value from it, so an object mapper needs to transform the JSON
return JsonUtils.newObjectMapper().treeToValue(jsonNode, clazz);
}
private Class findClassForTypeName(final String name) throws IOException {
return getOrThrow(nameClassMap, name, () -> new IOException("No mapping for " + name + " in " + AttributeDefinitionDeserializer.class.getCanonicalName()));
}
private String extractNameFromJson(final JsonNode jsonNode) {
return jsonNode.get("type").get("name").asText();
}
}