| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.devtools.common.options; |
| |
| import static java.util.Comparator.comparing; |
| import static java.util.stream.Collectors.toCollection; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ArrayListMultimap; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterators; |
| import com.google.common.collect.LinkedHashMultimap; |
| import com.google.common.collect.Multimap; |
| import com.google.devtools.common.options.OptionsParser.OptionDescription; |
| import com.google.devtools.common.options.OptionsParser.OptionValueDescription; |
| import com.google.devtools.common.options.OptionsParser.UnparsedOptionValueDescription; |
| import java.lang.reflect.Constructor; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.function.Function; |
| import javax.annotation.Nullable; |
| |
| /** |
| * The implementation of the options parser. This is intentionally package |
| * private for full flexibility. Use {@link OptionsParser} or {@link Options} |
| * if you're a consumer. |
| */ |
| class OptionsParserImpl { |
| |
| private final OptionsData optionsData; |
| |
| /** |
| * We store the results of parsing the arguments in here. It'll look like |
| * |
| * <pre> |
| * OptionDefinition("--host") -> "www.google.com" |
| * OptionDefinition("--port") -> 80 |
| * </pre> |
| * |
| * This map is modified by repeated calls to {@link #parse(OptionPriority,Function,List)}. |
| */ |
| private final Map<OptionDefinition, OptionValueDescription> parsedValues = new HashMap<>(); |
| |
| /** |
| * We store the pre-parsed, explicit options for each priority in here. |
| * We use partially preparsed options, which can be different from the original |
| * representation, e.g. "--nofoo" becomes "--foo=0". |
| */ |
| private final List<UnparsedOptionValueDescription> unparsedValues = new ArrayList<>(); |
| |
| /** |
| * Unparsed values for use with the canonicalize command are stored separately from unparsedValues |
| * so that invocation policy can modify the values for canonicalization (e.g. override |
| * user-specified values with default values) without corrupting the data used to represent the |
| * user's original invocation for {@link #asListOfExplicitOptions()} and {@link |
| * #asListOfUnparsedOptions()}. A LinkedHashMultimap is used so that canonicalization happens in |
| * the correct order and multiple values can be stored for flags that allow multiple values. |
| */ |
| private final Multimap<OptionDefinition, UnparsedOptionValueDescription> canonicalizeValues = |
| LinkedHashMultimap.create(); |
| |
| private final List<String> warnings = new ArrayList<>(); |
| |
| private boolean allowSingleDashLongOptions = false; |
| |
| private ArgsPreProcessor argsPreProcessor = |
| new ArgsPreProcessor() { |
| @Override |
| public List<String> preProcess(List<String> args) throws OptionsParsingException { |
| return args; |
| } |
| }; |
| |
| /** |
| * Create a new parser object |
| */ |
| OptionsParserImpl(OptionsData optionsData) { |
| this.optionsData = optionsData; |
| } |
| |
| OptionsData getOptionsData() { |
| return optionsData; |
| } |
| |
| /** |
| * Indicates whether or not the parser will allow long options with a |
| * single-dash, instead of the usual double-dash, too, eg. -example instead of just --example. |
| */ |
| void setAllowSingleDashLongOptions(boolean allowSingleDashLongOptions) { |
| this.allowSingleDashLongOptions = allowSingleDashLongOptions; |
| } |
| |
| /** Sets the ArgsPreProcessor for manipulations of the options before parsing. */ |
| void setArgsPreProcessor(ArgsPreProcessor preProcessor) { |
| this.argsPreProcessor = Preconditions.checkNotNull(preProcessor); |
| } |
| |
| /** |
| * Implements {@link OptionsParser#asListOfUnparsedOptions()}. |
| */ |
| List<UnparsedOptionValueDescription> asListOfUnparsedOptions() { |
| return unparsedValues |
| .stream() |
| // It is vital that this sort is stable so that options on the same priority are not |
| // reordered. |
| .sorted(comparing(UnparsedOptionValueDescription::getPriority)) |
| .collect(toCollection(ArrayList::new)); |
| } |
| |
| /** |
| * Implements {@link OptionsParser#asListOfExplicitOptions()}. |
| */ |
| List<UnparsedOptionValueDescription> asListOfExplicitOptions() { |
| return unparsedValues |
| .stream() |
| .filter(UnparsedOptionValueDescription::isExplicit) |
| // It is vital that this sort is stable so that options on the same priority are not |
| // reordered. |
| .sorted(comparing(UnparsedOptionValueDescription::getPriority)) |
| .collect(toCollection(ArrayList::new)); |
| } |
| |
| /** |
| * Implements {@link OptionsParser#canonicalize}. |
| */ |
| List<String> asCanonicalizedList() { |
| return canonicalizeValues |
| .values() |
| .stream() |
| // Sort implicit requirement options to the end, keeping their existing order, and sort |
| // the other options alphabetically. |
| .sorted( |
| (v1, v2) -> { |
| if (v1.isImplicitRequirement()) { |
| return v2.isImplicitRequirement() ? 0 : 1; |
| } |
| if (v2.isImplicitRequirement()) { |
| return -1; |
| } |
| return v1.getName().compareTo(v2.getName()); |
| }) |
| // Ignore expansion options. |
| .filter(value -> !value.isExpansion()) |
| .map(value -> "--" + value.getName() + "=" + value.getUnparsedValue()) |
| .collect(toCollection(ArrayList::new)); |
| } |
| |
| /** |
| * Implements {@link OptionsParser#asListOfEffectiveOptions()}. |
| */ |
| List<OptionValueDescription> asListOfEffectiveOptions() { |
| List<OptionValueDescription> result = new ArrayList<>(); |
| for (Map.Entry<String, OptionDefinition> mapEntry : optionsData.getAllOptionDefinitions()) { |
| OptionDefinition optionDefinition = mapEntry.getValue(); |
| OptionValueDescription entry = parsedValues.get(optionDefinition); |
| if (entry == null) { |
| result.add(OptionValueDescription.newDefaultValue(optionDefinition)); |
| } else { |
| result.add(entry); |
| } |
| } |
| return result; |
| } |
| |
| private void maybeAddDeprecationWarning(OptionDefinition optionDefinition) { |
| // Continue to support the old behavior for @Deprecated options. |
| String warning = optionDefinition.getDeprecationWarning(); |
| if (!warning.isEmpty() || (optionDefinition.getField().isAnnotationPresent(Deprecated.class))) { |
| addDeprecationWarning(optionDefinition.getOptionName(), warning); |
| } |
| } |
| |
| private void addDeprecationWarning(String optionName, String warning) { |
| warnings.add("Option '" + optionName + "' is deprecated" |
| + (warning.isEmpty() ? "" : ": " + warning)); |
| } |
| |
| // Warnings should not end with a '.' because the internal reporter adds one automatically. |
| private void setValue( |
| OptionDefinition optionDefinition, |
| String name, |
| Object value, |
| OptionPriority priority, |
| String source, |
| String implicitDependant, |
| String expandedFrom) { |
| OptionValueDescription entry = parsedValues.get(optionDefinition); |
| if (entry != null) { |
| // Override existing option if the new value has higher or equal priority. |
| if (priority.compareTo(entry.getPriority()) >= 0) { |
| // Output warnings: |
| if ((implicitDependant != null) && (entry.getImplicitDependant() != null)) { |
| if (!implicitDependant.equals(entry.getImplicitDependant())) { |
| warnings.add( |
| "Option '" |
| + name |
| + "' is implicitly defined by both option '" |
| + entry.getImplicitDependant() |
| + "' and option '" |
| + implicitDependant |
| + "'"); |
| } |
| } else if ((implicitDependant != null) && priority.equals(entry.getPriority())) { |
| warnings.add( |
| "Option '" |
| + name |
| + "' is implicitly defined by option '" |
| + implicitDependant |
| + "'; the implicitly set value overrides the previous one"); |
| } else if (entry.getImplicitDependant() != null) { |
| warnings.add( |
| "A new value for option '" |
| + name |
| + "' overrides a previous implicit setting of that option by option '" |
| + entry.getImplicitDependant() |
| + "'"); |
| } else if ((priority == entry.getPriority()) |
| && ((entry.getExpansionParent() == null) && (expandedFrom != null))) { |
| // Create a warning if an expansion option overrides an explicit option: |
| warnings.add("The option '" + expandedFrom + "' was expanded and now overrides a " |
| + "previous explicitly specified option '" + name + "'"); |
| } else if ((entry.getExpansionParent() != null) && (expandedFrom != null)) { |
| warnings.add( |
| "The option '" |
| + name |
| + "' was expanded to from both options '" |
| + entry.getExpansionParent() |
| + "' and '" |
| + expandedFrom |
| + "'"); |
| } |
| |
| // Record the new value: |
| parsedValues.put( |
| optionDefinition, |
| OptionValueDescription.newOptionValue( |
| optionDefinition, null, value, priority, source, implicitDependant, expandedFrom)); |
| } |
| } else { |
| parsedValues.put( |
| optionDefinition, |
| OptionValueDescription.newOptionValue( |
| optionDefinition, null, value, priority, source, implicitDependant, expandedFrom)); |
| maybeAddDeprecationWarning(optionDefinition); |
| } |
| } |
| |
| private void addListValue( |
| OptionDefinition optionDefinition, |
| Object value, |
| OptionPriority priority, |
| String source, |
| String implicitDependant, |
| String expandedFrom) { |
| OptionValueDescription entry = parsedValues.get(optionDefinition); |
| if (entry == null) { |
| entry = |
| OptionValueDescription.newOptionValue( |
| optionDefinition, |
| /* originalValueString */ null, |
| ArrayListMultimap.create(), |
| priority, |
| source, |
| implicitDependant, |
| expandedFrom); |
| parsedValues.put(optionDefinition, entry); |
| maybeAddDeprecationWarning(optionDefinition); |
| } |
| entry.addValue(priority, value); |
| } |
| |
| OptionValueDescription clearValue(String optionName) |
| throws OptionsParsingException { |
| OptionDefinition optionDefinition = optionsData.getOptionDefinitionFromName(optionName); |
| if (optionDefinition == null) { |
| throw new IllegalArgumentException("No such option '" + optionName + "'"); |
| } |
| |
| // Actually remove the value from various lists tracking effective options. |
| canonicalizeValues.removeAll(optionDefinition); |
| return parsedValues.remove(optionDefinition); |
| } |
| |
| OptionValueDescription getOptionValueDescription(String name) { |
| OptionDefinition optionDefinition = optionsData.getOptionDefinitionFromName(name); |
| if (optionDefinition == null) { |
| throw new IllegalArgumentException("No such option '" + name + "'"); |
| } |
| return parsedValues.get(optionDefinition); |
| } |
| |
| OptionDescription getOptionDescription(String name) throws OptionsParsingException { |
| OptionDefinition optionDefinition = optionsData.getOptionDefinitionFromName(name); |
| if (optionDefinition == null) { |
| return null; |
| } |
| |
| return new OptionDescription( |
| optionDefinition, |
| optionsData.getExpansionDataForField(optionDefinition), |
| getImplicitDependantDescriptions( |
| ImmutableList.copyOf(optionDefinition.getImplicitRequirements()), name)); |
| } |
| |
| /** |
| * @return A list of the descriptions corresponding to the implicit dependant flags passed in. |
| * These descriptions are are divorced from the command line - there is no correct priority or |
| * source for these, as they are not actually set values. The value itself is also a string, |
| * no conversion has taken place. |
| */ |
| private ImmutableList<OptionValueDescription> getImplicitDependantDescriptions( |
| ImmutableList<String> options, String implicitDependant) throws OptionsParsingException { |
| ImmutableList.Builder<OptionValueDescription> builder = ImmutableList.builder(); |
| Iterator<String> optionsIterator = options.iterator(); |
| |
| while (optionsIterator.hasNext()) { |
| String unparsedFlagExpression = optionsIterator.next(); |
| ParseOptionResult parseResult = parseOption(unparsedFlagExpression, optionsIterator); |
| builder.add( |
| OptionValueDescription.newOptionValue( |
| parseResult.optionDefinition, |
| parseResult.value, |
| /* value */ null, |
| /* priority */ null, |
| /* source */ null, |
| implicitDependant, |
| /* expendedFrom */ null)); |
| } |
| return builder.build(); |
| } |
| |
| /** |
| * @return A list of the descriptions corresponding to options expanded from the flag for the |
| * given value. These descriptions are are divorced from the command line - there is no |
| * correct priority or source for these, as they are not actually set values. The value itself |
| * is also a string, no conversion has taken place. |
| */ |
| ImmutableList<OptionValueDescription> getExpansionOptionValueDescriptions( |
| String flagName, @Nullable String flagValue) throws OptionsParsingException { |
| ImmutableList.Builder<OptionValueDescription> builder = ImmutableList.builder(); |
| OptionDefinition optionDefinition = optionsData.getOptionDefinitionFromName(flagName); |
| |
| ImmutableList<String> options = optionsData.getEvaluatedExpansion(optionDefinition, flagValue); |
| Iterator<String> optionsIterator = options.iterator(); |
| |
| while (optionsIterator.hasNext()) { |
| String unparsedFlagExpression = optionsIterator.next(); |
| ParseOptionResult parseResult = parseOption(unparsedFlagExpression, optionsIterator); |
| builder.add( |
| OptionValueDescription.newOptionValue( |
| parseResult.optionDefinition, |
| parseResult.value, |
| /* value */ null, |
| /* priority */ null, |
| /* source */ null, |
| /* implicitDependant */ null, |
| flagName)); |
| } |
| return builder.build(); |
| } |
| |
| boolean containsExplicitOption(String name) { |
| OptionDefinition optionDefinition = optionsData.getOptionDefinitionFromName(name); |
| if (optionDefinition == null) { |
| throw new IllegalArgumentException("No such option '" + name + "'"); |
| } |
| return parsedValues.get(optionDefinition) != null; |
| } |
| |
| /** |
| * Parses the args, and returns what it doesn't parse. May be called multiple |
| * times, and may be called recursively. In each call, there may be no |
| * duplicates, but separate calls may contain intersecting sets of options; in |
| * that case, the arg seen last takes precedence. |
| */ |
| List<String> parse(OptionPriority priority, Function<? super String, String> sourceFunction, |
| List<String> args) throws OptionsParsingException { |
| return parse(priority, sourceFunction, null, null, args); |
| } |
| |
| /** |
| * Parses the args, and returns what it doesn't parse. May be called multiple |
| * times, and may be called recursively. Calls may contain intersecting sets |
| * of options; in that case, the arg seen last takes precedence. |
| * |
| * <p>The method uses the invariant that if an option has neither an implicit |
| * dependent nor an expanded from value, then it must have been explicitly |
| * set. |
| */ |
| private List<String> parse( |
| OptionPriority priority, |
| Function<? super String, String> sourceFunction, |
| String implicitDependent, |
| String expandedFrom, |
| List<String> args) throws OptionsParsingException { |
| |
| List<String> unparsedArgs = new ArrayList<>(); |
| LinkedHashMap<String, List<String>> implicitRequirements = new LinkedHashMap<>(); |
| |
| Iterator<String> argsIterator = argsPreProcessor.preProcess(args).iterator(); |
| while (argsIterator.hasNext()) { |
| String arg = argsIterator.next(); |
| |
| if (!arg.startsWith("-")) { |
| unparsedArgs.add(arg); |
| continue; // not an option arg |
| } |
| |
| if (arg.equals("--")) { // "--" means all remaining args aren't options |
| Iterators.addAll(unparsedArgs, argsIterator); |
| break; |
| } |
| |
| ParseOptionResult parseOptionResult = parseOption(arg, argsIterator); |
| OptionDefinition optionDefinition = parseOptionResult.optionDefinition; |
| @Nullable String value = parseOptionResult.value; |
| |
| if (optionDefinition.isWrapperOption()) { |
| if (value.startsWith("-")) { |
| String sourceMessage = |
| "Unwrapped from wrapper option --" + optionDefinition.getOptionName(); |
| List<String> unparsed = |
| parse( |
| priority, |
| o -> sourceMessage, |
| null, // implicitDependent |
| null, // expandedFrom |
| ImmutableList.of(value)); |
| |
| if (!unparsed.isEmpty()) { |
| throw new OptionsParsingException( |
| "Unparsed options remain after unwrapping " |
| + arg |
| + ": " |
| + Joiner.on(' ').join(unparsed)); |
| } |
| |
| // Don't process implicitRequirements or expansions for wrapper options. In particular, |
| // don't record this option in unparsedValues, so that only the wrapped option shows |
| // up in canonicalized options. |
| continue; |
| |
| } else { |
| throw new OptionsParsingException( |
| "Invalid --" |
| + optionDefinition.getOptionName() |
| + " value format. " |
| + "You may have meant --" |
| + optionDefinition.getOptionName() |
| + "=--" |
| + value); |
| } |
| } |
| |
| if (implicitDependent == null) { |
| // Log explicit options and expanded options in the order they are parsed (can be sorted |
| // later). Also remember whether they were expanded or not. This information is needed to |
| // correctly canonicalize flags. |
| UnparsedOptionValueDescription unparsedOptionValueDescription = |
| new UnparsedOptionValueDescription( |
| optionDefinition, |
| value, |
| priority, |
| sourceFunction.apply(optionDefinition.getOptionName()), |
| expandedFrom == null); |
| unparsedValues.add(unparsedOptionValueDescription); |
| if (optionDefinition.allowsMultiple()) { |
| canonicalizeValues.put(optionDefinition, unparsedOptionValueDescription); |
| } else { |
| canonicalizeValues.replaceValues( |
| optionDefinition, ImmutableList.of(unparsedOptionValueDescription)); |
| } |
| } |
| |
| // Handle expansion options. |
| if (optionDefinition.isExpansionOption()) { |
| ImmutableList<String> expansion = |
| optionsData.getEvaluatedExpansion(optionDefinition, value); |
| |
| String sourceMessage = |
| "expanded from option --" |
| + optionDefinition.getOptionName() |
| + " from " |
| + sourceFunction.apply(optionDefinition.getOptionName()); |
| Function<Object, String> expansionSourceFunction = o -> sourceMessage; |
| maybeAddDeprecationWarning(optionDefinition); |
| List<String> unparsed = |
| parse( |
| priority, |
| expansionSourceFunction, |
| null, |
| optionDefinition.getOptionName(), |
| expansion); |
| if (!unparsed.isEmpty()) { |
| // Throw an assertion, because this indicates an error in the code that specified the |
| // expansion for the current option. |
| throw new AssertionError( |
| "Unparsed options remain after parsing expansion of " |
| + arg |
| + ": " |
| + Joiner.on(' ').join(unparsed)); |
| } |
| } else { |
| Converter<?> converter = optionDefinition.getConverter(); |
| Object convertedValue; |
| try { |
| convertedValue = converter.convert(value); |
| } catch (OptionsParsingException e) { |
| // The converter doesn't know the option name, so we supply it here by |
| // re-throwing: |
| throw new OptionsParsingException("While parsing option " + arg |
| + ": " + e.getMessage(), e); |
| } |
| |
| // ...but allow duplicates of single-use options across separate calls to |
| // parse(); latest wins: |
| if (!optionDefinition.allowsMultiple()) { |
| setValue( |
| optionDefinition, |
| optionDefinition.getOptionName(), |
| convertedValue, |
| priority, |
| sourceFunction.apply(optionDefinition.getOptionName()), |
| implicitDependent, |
| expandedFrom); |
| } else { |
| // But if it's a multiple-use option, then just accumulate the |
| // values, in the order in which they were seen. |
| // Note: The type of the list member is not known; Java introspection |
| // only makes it available in String form via the signature string |
| // for the field declaration. |
| addListValue( |
| optionDefinition, |
| convertedValue, |
| priority, |
| sourceFunction.apply(optionDefinition.getOptionName()), |
| implicitDependent, |
| expandedFrom); |
| } |
| } |
| |
| // Collect any implicit requirements. |
| if (optionDefinition.getImplicitRequirements().length > 0) { |
| implicitRequirements.put( |
| optionDefinition.getOptionName(), |
| Arrays.asList(optionDefinition.getImplicitRequirements())); |
| } |
| } |
| |
| // Now parse any implicit requirements that were collected. |
| // TODO(bazel-team): this should happen when the option is encountered. |
| if (!implicitRequirements.isEmpty()) { |
| for (Map.Entry<String, List<String>> entry : implicitRequirements.entrySet()) { |
| String sourceMessage = |
| "implicit requirement of option --" |
| + entry.getKey() |
| + " from " |
| + sourceFunction.apply(entry.getKey()); |
| Function<Object, String> requirementSourceFunction = |
| o -> sourceMessage; |
| |
| List<String> unparsed = parse(priority, requirementSourceFunction, entry.getKey(), null, |
| entry.getValue()); |
| if (!unparsed.isEmpty()) { |
| // Throw an assertion, because this indicates an error in the code that specified in the |
| // implicit requirements for the option(s). |
| throw new AssertionError("Unparsed options remain after parsing implicit options: " |
| + Joiner.on(' ').join(unparsed)); |
| } |
| } |
| } |
| |
| return unparsedArgs; |
| } |
| |
| private static final class ParseOptionResult { |
| final OptionDefinition optionDefinition; |
| @Nullable final String value; |
| |
| ParseOptionResult(OptionDefinition optionDefinition, @Nullable String value) { |
| this.optionDefinition = optionDefinition; |
| this.value = value; |
| } |
| } |
| |
| private ParseOptionResult parseOption(String arg, Iterator<String> nextArgs) |
| throws OptionsParsingException { |
| |
| String value = null; |
| OptionDefinition optionDefinition; |
| boolean booleanValue = true; |
| |
| if (arg.length() == 2) { // -l (may be nullary or unary) |
| optionDefinition = optionsData.getFieldForAbbrev(arg.charAt(1)); |
| booleanValue = true; |
| |
| } else if (arg.length() == 3 && arg.charAt(2) == '-') { // -l- (boolean) |
| optionDefinition = optionsData.getFieldForAbbrev(arg.charAt(1)); |
| booleanValue = false; |
| |
| } else if (allowSingleDashLongOptions // -long_option |
| || arg.startsWith("--")) { // or --long_option |
| |
| int equalsAt = arg.indexOf('='); |
| int nameStartsAt = arg.startsWith("--") ? 2 : 1; |
| String name = |
| equalsAt == -1 ? arg.substring(nameStartsAt) : arg.substring(nameStartsAt, equalsAt); |
| if (name.trim().isEmpty()) { |
| throw new OptionsParsingException("Invalid options syntax: " + arg, arg); |
| } |
| value = equalsAt == -1 ? null : arg.substring(equalsAt + 1); |
| optionDefinition = optionsData.getOptionDefinitionFromName(name); |
| |
| // Look for a "no"-prefixed option name: "no<optionName>". |
| if (optionDefinition == null && name.startsWith("no")) { |
| name = name.substring(2); |
| optionDefinition = optionsData.getOptionDefinitionFromName(name); |
| booleanValue = false; |
| if (optionDefinition != null) { |
| // TODO(bazel-team): Add tests for these cases. |
| if (!optionDefinition.isBooleanField()) { |
| throw new OptionsParsingException( |
| "Illegal use of 'no' prefix on non-boolean option: " + arg, arg); |
| } |
| if (value != null) { |
| throw new OptionsParsingException( |
| "Unexpected value after boolean option: " + arg, arg); |
| } |
| // "no<optionname>" signifies a boolean option w/ false value |
| value = "0"; |
| } |
| } |
| } else { |
| throw new OptionsParsingException("Invalid options syntax: " + arg, arg); |
| } |
| |
| if (optionDefinition == null |
| || ImmutableList.copyOf(optionDefinition.getOptionMetadataTags()) |
| .contains(OptionMetadataTag.INTERNAL)) { |
| // Do not recognize internal options, which are treated as if they did not exist. |
| throw new OptionsParsingException("Unrecognized option: " + arg, arg); |
| } |
| |
| if (value == null) { |
| // Special-case boolean to supply value based on presence of "no" prefix. |
| if (optionDefinition.isBooleanField()) { |
| value = booleanValue ? "1" : "0"; |
| } else if (optionDefinition.getType().equals(Void.class) |
| && !optionDefinition.isWrapperOption()) { |
| // This is expected, Void type options have no args (unless they're wrapper options). |
| } else if (nextArgs.hasNext()) { |
| value = nextArgs.next(); // "--flag value" form |
| } else { |
| throw new OptionsParsingException("Expected value after " + arg); |
| } |
| } |
| |
| return new ParseOptionResult(optionDefinition, value); |
| } |
| |
| /** |
| * Gets the result of parsing the options. |
| */ |
| <O extends OptionsBase> O getParsedOptions(Class<O> optionsClass) { |
| // Create the instance: |
| O optionsInstance; |
| try { |
| Constructor<O> constructor = optionsData.getConstructor(optionsClass); |
| if (constructor == null) { |
| return null; |
| } |
| optionsInstance = constructor.newInstance(); |
| } catch (ReflectiveOperationException e) { |
| throw new IllegalStateException("Error while instantiating options class", e); |
| } |
| |
| // Set the fields |
| for (OptionDefinition optionDefinition : |
| OptionsData.getAllOptionDefinitionsForClass(optionsClass)) { |
| Object value; |
| OptionValueDescription entry = parsedValues.get(optionDefinition); |
| if (entry == null) { |
| value = optionDefinition.getDefaultValue(); |
| } else { |
| value = entry.getValue(); |
| } |
| try { |
| optionDefinition.getField().set(optionsInstance, value); |
| } catch (IllegalAccessException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| return optionsInstance; |
| } |
| |
| List<String> getWarnings() { |
| return ImmutableList.copyOf(warnings); |
| } |
| } |
