2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2021 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.clamp.controlloop.participant.simulator.main.parameters;
24 import javax.ws.rs.core.Response;
25 import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
26 import org.onap.policy.common.parameters.BeanValidationResult;
27 import org.onap.policy.common.utils.coder.Coder;
28 import org.onap.policy.common.utils.coder.CoderException;
29 import org.onap.policy.common.utils.coder.StandardCoder;
32 * This class handles reading, parsing and validating of participant simulator parameters from JSON files.
34 public class ParticipantSimulatorParameterHandler {
36 private static final Coder CODER = new StandardCoder();
39 * Read the parameters from the path of the file.
41 * @param path path of the config file.
42 * @return the parameters read from the configuration file
43 * @throws ControlLoopException on parameter exceptions
45 public ParticipantSimulatorParameters toParticipantSimulatorParameters(String path) throws ControlLoopException {
46 ParticipantSimulatorParameters parameters = null;
47 // Read the parameters
49 // Read the parameters from JSON
50 File file = new File(path);
51 parameters = CODER.decode(file, ParticipantSimulatorParameters.class);
52 } catch (final CoderException e) {
53 final String errorMessage = "error reading parameters from \"" + path + "\"" + System.lineSeparator() + "("
54 + e.getClass().getSimpleName() + ")";
55 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage, e);
58 // The JSON processing returns null if there is an empty file
59 if (parameters == null) {
60 final String errorMessage = "no parameters found in \"" + path + "\"";
61 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage);
64 // validate the parameters
65 final BeanValidationResult validationResult = parameters.validate();
66 if (!validationResult.isValid()) {
67 final String returnMessage = "validation error(s) on parameters from \"" + path + "\""
68 + System.lineSeparator() + validationResult.getResult();
70 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, returnMessage);