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.clamp.controlloop.participant.simulator.main.startstop.ParticipantSimulatorCommandLineArguments;
27 import org.onap.policy.common.parameters.GroupValidationResult;
28 import org.onap.policy.common.utils.coder.Coder;
29 import org.onap.policy.common.utils.coder.CoderException;
30 import org.onap.policy.common.utils.coder.StandardCoder;
33 * This class handles reading, parsing and validating of participant simulator parameters from JSON files.
35 public class ParticipantSimulatorParameterHandler {
37 private static final Coder CODER = new StandardCoder();
40 * Read the parameters from the parameter file.
42 * @param arguments the arguments passed to simulator
43 * @return the parameters read from the configuration file
44 * @throws ControlLoopException on parameter exceptions
46 public ParticipantSimulatorParameters getParameters(final ParticipantSimulatorCommandLineArguments arguments)
47 throws ControlLoopException {
48 ParticipantSimulatorParameters parameters = null;
50 // Read the parameters
52 // Read the parameters from JSON
53 File file = new File(arguments.getFullConfigurationFilePath());
54 parameters = CODER.decode(file, ParticipantSimulatorParameters.class);
55 } catch (final CoderException e) {
56 final String errorMessage = "error reading parameters from \"" + arguments.getConfigurationFilePath()
57 + "\"\n" + "(" + e.getClass().getSimpleName() + ")";
58 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage, e);
61 // The JSON processing returns null if there is an empty file
62 if (parameters == null) {
63 final String errorMessage = "no parameters found in \"" + arguments.getConfigurationFilePath() + "\"";
64 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage);
67 // validate the parameters
68 final GroupValidationResult validationResult = parameters.validate();
69 if (!validationResult.isValid()) {
70 String returnMessage =
71 "validation error(s) on parameters from \"" + arguments.getConfigurationFilePath() + "\"\n";
72 returnMessage += validationResult.getResult();
73 throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, returnMessage);