Examples with ManifestTemplate com.google.cloud.tools.jib.image.json.ManifestTemplate used on opensource projects

Example 6 with ManifestTemplate

use of com.google.cloud.tools.jib.image.json.ManifestTemplate in project jib by google.

the class ManifestPuller method getManifestTemplateFromJson.

/**
 * Instantiates a {@link ManifestTemplate} from a JSON string. This checks the {@code
 * schemaVersion} field of the JSON to determine which manifest version to use.
 */
private T getManifestTemplateFromJson(String jsonString) throws IOException, UnknownManifestFormatException {
    ObjectNode node = new ObjectMapper().readValue(jsonString, ObjectNode.class);
    if (!node.has("schemaVersion")) {
        throw new UnknownManifestFormatException("Cannot find field 'schemaVersion' in manifest");
    }
    if (!manifestTemplateClass.equals(ManifestTemplate.class)) {
        return JsonTemplateMapper.readJson(jsonString, manifestTemplateClass);
    }
    int schemaVersion = node.get("schemaVersion").asInt(-1);
    if (schemaVersion == -1) {
        throw new UnknownManifestFormatException("`schemaVersion` field is not an integer");
    }
    if (schemaVersion == 1) {
        return manifestTemplateClass.cast(JsonTemplateMapper.readJson(jsonString, V21ManifestTemplate.class));
    }
    if (schemaVersion == 2) {
        // 'schemaVersion' of 2 can be either Docker V2.2 or OCI.
        String mediaType = node.get("mediaType").asText();
        if (V22ManifestTemplate.MANIFEST_MEDIA_TYPE.equals(mediaType)) {
            return manifestTemplateClass.cast(JsonTemplateMapper.readJson(jsonString, V22ManifestTemplate.class));
        }
        if (OCIManifestTemplate.MANIFEST_MEDIA_TYPE.equals(mediaType)) {
            return manifestTemplateClass.cast(JsonTemplateMapper.readJson(jsonString, OCIManifestTemplate.class));
        }
        throw new UnknownManifestFormatException("Unknown mediaType: " + mediaType);
    }
    throw new UnknownManifestFormatException("Unknown schemaVersion: " + schemaVersion + " - only 1 and 2 are supported");
}