2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
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.pdpx.main.startstop;
24 import java.io.PrintWriter;
25 import java.io.StringWriter;
26 import java.util.Arrays;
27 import org.apache.commons.cli.CommandLine;
28 import org.apache.commons.cli.DefaultParser;
29 import org.apache.commons.cli.HelpFormatter;
30 import org.apache.commons.cli.Option;
31 import org.apache.commons.cli.Options;
32 import org.apache.commons.cli.ParseException;
33 import org.onap.policy.common.utils.resources.ResourceUtils;
34 import org.onap.policy.pdpx.main.PolicyXacmlPdpException;
35 import org.onap.policy.pdpx.main.PolicyXacmlPdpRuntimeException;
39 * This class reads and handles command line parameters for the policy xacml pdp main program.
41 public class XacmlPdpCommandLineArguments {
42 private static final String FILE_MESSAGE_PREAMBLE = " file \"";
43 private static final int HELP_LINE_LENGTH = 120;
45 // Apache Commons CLI options
46 private final Options options;
48 // The command line options
49 private String configurationFilePath = null;
50 private String propertyFilePath = null;
53 * Construct the options for the CLI editor.
55 public XacmlPdpCommandLineArguments() {
57 options = new Options();
58 options.addOption(Option.builder("h")
60 .desc("outputs the usage of this command")
64 options.addOption(Option.builder("v")
66 .desc("outputs the version of policy xacml pdp")
70 options.addOption(Option.builder("c")
71 .longOpt("config-file")
72 .desc("the full path to the configuration file to use, "
73 + "the configuration file must be a Json file containing the policy xacml pdp parameters")
75 .argName("CONFIG_FILE")
79 options.addOption(Option.builder("p")
80 .longOpt("property-file")
81 .desc("the full path to the topic property file to use, "
82 + "the property file contains the policy pap topic properties")
92 * Construct the options for the CLI editor and parse in the given arguments.
94 * @param args The command line arguments
96 public XacmlPdpCommandLineArguments(final String[] args) {
97 // Set up the options with the default constructor
100 // Parse the arguments
103 } catch (final PolicyXacmlPdpException e) {
104 throw new PolicyXacmlPdpRuntimeException("parse error on policy xacml pdp parameters", e);
109 * Parse the command line options.
111 * @param args The command line arguments
112 * @return a string with a message for help and version, or null if there is no message
113 * @throws PolicyXacmlPdpException on command argument errors
115 public String parse(final String[] args) throws PolicyXacmlPdpException {
116 // Clear all our arguments
117 setConfigurationFilePath(null);
118 setPropertyFilePath(null);
120 CommandLine commandLine = null;
122 commandLine = new DefaultParser().parse(options, args);
123 } catch (final ParseException e) {
124 throw new PolicyXacmlPdpException("invalid command line arguments specified : " + e.getMessage());
127 // Arguments left over after Commons CLI does its stuff
128 final String[] remainingArgs = commandLine.getArgs();
130 if (remainingArgs.length > 0) {
131 throw new PolicyXacmlPdpException("too many command line arguments specified : " + Arrays.toString(args));
134 if (remainingArgs.length == 1) {
135 configurationFilePath = remainingArgs[0];
138 if (commandLine.hasOption('h')) {
139 return help(Main.class.getName());
142 if (commandLine.hasOption('v')) {
146 if (commandLine.hasOption('c')) {
147 setConfigurationFilePath(commandLine.getOptionValue('c'));
150 if (commandLine.hasOption('p')) {
151 setPropertyFilePath(commandLine.getOptionValue('p'));
158 * Validate the command line options.
160 * @throws PolicyXacmlPdpException on command argument validation errors
162 public void validate() throws PolicyXacmlPdpException {
163 validateReadableFile("policy xacml pdp configuration", configurationFilePath);
167 * Print version information for policy xacml pdp.
169 * @return the version string
171 public String version() {
172 return ResourceUtils.getResourceAsString("version.txt");
176 * Print help information for policy xacml pdp.
178 * @param mainClassName the main class name
179 * @return the help string
181 public String help(final String mainClassName) {
182 final var helpFormatter = new HelpFormatter();
183 final var stringWriter = new StringWriter();
184 final var printWriter = new PrintWriter(stringWriter);
186 helpFormatter.printHelp(printWriter, HELP_LINE_LENGTH, mainClassName + " [options...]", "options", options, 0,
189 return stringWriter.toString();
193 * Gets the configuration file path.
195 * @return the configuration file path
197 public String getConfigurationFilePath() {
198 return configurationFilePath;
202 * Gets the full expanded configuration file path.
204 * @return the configuration file path
206 public String getFullConfigurationFilePath() {
207 return ResourceUtils.getFilePath4Resource(getConfigurationFilePath());
211 * Sets the configuration file path.
213 * @param configurationFilePath the configuration file path
215 public void setConfigurationFilePath(final String configurationFilePath) {
216 this.configurationFilePath = configurationFilePath;
221 * Check set configuration file path.
223 * @return true, if check set configuration file path
225 public boolean checkSetConfigurationFilePath() {
226 return configurationFilePath != null && !configurationFilePath.isEmpty();
230 * Gets the property file path.
232 * @return the property file path
234 public String getPropertyFilePath() {
235 return propertyFilePath;
239 * Gets the full expanded property file path.
241 * @return the property file path
243 public String getFullPropertyFilePath() {
244 return ResourceUtils.getFilePath4Resource(getPropertyFilePath());
248 * Sets the property file path.
250 * @param propertyFilePath the property file path
252 public void setPropertyFilePath(final String propertyFilePath) {
253 this.propertyFilePath = propertyFilePath;
258 * Validate readable file.
260 * @param fileTag the file tag
261 * @param fileName the file name
262 * @throws PolicyXacmlPdpException on the file name passed as a parameter
264 private void validateReadableFile(final String fileTag, final String fileName) throws PolicyXacmlPdpException {
265 if (fileName == null || fileName.isEmpty()) {
266 throw new PolicyXacmlPdpException(fileTag + " file was not specified as an argument");
269 // The file name refers to a resource on the local file system
270 final var fileUrl = ResourceUtils.getUrl4Resource(fileName);
271 if (fileUrl == null) {
272 throw new PolicyXacmlPdpException(fileTag + FILE_MESSAGE_PREAMBLE + fileName + "\" does not exist");
275 final var theFile = new File(fileUrl.getPath());
276 if (!theFile.exists()) {
277 throw new PolicyXacmlPdpException(fileTag + FILE_MESSAGE_PREAMBLE + fileName + "\" does not exist");
279 if (!theFile.isFile()) {
280 throw new PolicyXacmlPdpException(fileTag + FILE_MESSAGE_PREAMBLE + fileName + "\" is not a normal file");
282 if (!theFile.canRead()) {
283 throw new PolicyXacmlPdpException(fileTag + FILE_MESSAGE_PREAMBLE + fileName + "\" is ureadable");