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package eu.dnetlib.dhp.common.java;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Properties;
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import java.util.Set;
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import org.apache.commons.cli.CommandLine;
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import org.apache.hadoop.fs.Path;
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/**
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* Handles parsing parameters passed to the {@link Process}
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* @author Mateusz Kobos
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*
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*/
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public class CmdLineParserForProcessRunParameters {
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/** Parse the command line arguments.
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*
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* @param cmdLine command line arguments
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* @param ports names of ports that ought to be extracted from command line
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*/
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public ProcessParameters run(CommandLine cmdLine, Ports ports) {
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Properties inputProperties = cmdLine.getOptionProperties(
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CmdLineParser.inputPrefix);
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assumePortNamesMatch(CmdLineParser.inputPrefix, inputProperties,
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ports.getInput().keySet());
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Map<String, Path> inputBindings = getBindings(
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inputProperties, ports.getInput().keySet());
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Properties outputProperties = cmdLine.getOptionProperties(
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CmdLineParser.outputPrefix);
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assumePortNamesMatch(CmdLineParser.outputPrefix, outputProperties,
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ports.getOutput().keySet());
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Map<String, Path> outputBindings = getBindings(
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outputProperties, ports.getOutput().keySet());
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PortBindings bindings = new PortBindings(inputBindings, outputBindings);
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Properties specialProperties = cmdLine.getOptionProperties(
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CmdLineParser.specialParametersPrefix);
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assumeContainAllMandatoryParameters(
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specialProperties, CmdLineParser.mandatorySpecialParameters);
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Properties rawProperties = cmdLine.getOptionProperties(
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CmdLineParser.processParametersPrefix);
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Map<String, String> processParameters = new HashMap<String, String>();
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for(Entry<Object, Object> entry: rawProperties.entrySet()){
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processParameters.put(
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(String)entry.getKey(), (String)entry.getValue());
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}
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return new ProcessParameters(bindings, processParameters);
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}
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private static void assumeContainAllMandatoryParameters(
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Properties properties, String[] mandatoryParameters){
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for(String otherParameter: mandatoryParameters){
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if(!properties.containsKey(otherParameter)){
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throw new CmdLineParserException(String.format(
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"Not all mandatory properties are set using the \"%s\" "
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+ "option are given, e.g. \"-%s\" parameter is missing",
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CmdLineParser.specialParametersPrefix, otherParameter));
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}
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}
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}
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private static void assumePortNamesMatch(String cmdLineParamPrefix,
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Properties cmdLineProperties, Set<String> portNames) {
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for (String name : portNames) {
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if (!cmdLineProperties.containsKey(name)) {
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throw new CmdLineParserException(String.format(
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"The port with name \"%s\" is not specified in "
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+ "command line (command line option \"-%s\" is missing)",
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name, cmdLineParamPrefix + name));
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}
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}
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for (Object cmdLineKeyObject : cmdLineProperties.keySet()) {
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String name = (String) cmdLineKeyObject;
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if (!portNames.contains(name)) {
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throw new CmdLineParserException(String.format(
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"A port name \"%s\" which is not specified is given "
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+ "in the command line "
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+ "(command line option \"%s\" is excess)",
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name, cmdLineParamPrefix + name));
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}
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}
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}
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private static Map<String, Path> getBindings(
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Properties cmdLineProperties, Set<String> portNames) {
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Map<String, Path> bindings = new HashMap<String, Path>();
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for (String name : portNames) {
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Path path = new Path((String) cmdLineProperties.get(name));
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bindings.put(name, path);
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}
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return bindings;
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}
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}
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