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[#363] API Change: Add parser option to limit the number of parts whe…
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…n splitting to max arity, for compatibility with commons-cli.
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@remkop
remkop committed Apr 17, 2018
1 parent 10027f8 commit c653149
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1 change: 1 addition & 0 deletions RELEASE-NOTES.md
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ No features have been promoted in this picocli release.

## <a name="3.0.0-beta-1-fixes"></a> Fixed issues
- [#355] API Change: Add method `ArgSpec.hasInitialValue`.
- [#363] API Change: Add parser option to limit the number of parts when splitting to max arity, for compatibility with commons-cli.
- [#356] Bug fix: `Interpreter.consumeArguments` should check max arity reached when `parser.arityRestrictsCumulativeSize` = true.


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88 changes: 61 additions & 27 deletions src/main/java/picocli/CommandLine.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3339,6 +3339,7 @@ public static class ParserSpec {
private boolean posixClusteredShortOptionsAllowed = true;
private boolean arityRestrictsCumulativeSize = false;
private boolean unmatchedOptionsArePositionalParams = false;
private boolean limitSplit = false;

/** Returns the String to use as the separator between options and option parameters. {@code "="} by default,
* initialized from {@link Command#separator()} if defined.*/
Expand All @@ -3362,6 +3363,10 @@ public static class ParserSpec {
public boolean arityRestrictsCumulativeSize() { return arityRestrictsCumulativeSize; }
/** @see CommandLine#isUnmatchedOptionsArePositionalParams() */
public boolean unmatchedOptionsArePositionalParams() { return unmatchedOptionsArePositionalParams; }
private boolean splitFirst() { return limitSplit(); }
/** Returns true if arguments should be split first before any further processing and the number of
* parts resulting from the split is limited to the max arity of the argument. */
public boolean limitSplit() { return limitSplit; }

/** Sets the String to use as the separator between options and option parameters.
* @return this ParserSpec for method chaining */
Expand All @@ -3384,6 +3389,9 @@ public static class ParserSpec {
public ParserSpec posixClusteredShortOptionsAllowed(boolean posixClusteredShortOptionsAllowed) { this.posixClusteredShortOptionsAllowed = posixClusteredShortOptionsAllowed; return this; }
/** @see CommandLine#setUnmatchedOptionsArePositionalParams(boolean) */
public ParserSpec unmatchedOptionsArePositionalParams(boolean unmatchedOptionsArePositionalParams) { this.unmatchedOptionsArePositionalParams = unmatchedOptionsArePositionalParams; return this; }
/** Sets whether arguments should be {@linkplain ArgSpec#splitRegex() split} first before any further processing.
* If true, the original argument will only be split into as many parts as allowed by max arity. */
public ParserSpec limitSplit(boolean limitSplit) { this.limitSplit = limitSplit; return this; }
void initSeparator(String value) { if (initializable(separator, value, DEFAULT_SEPARATOR)) {separator = value;} }
public String toString() {
return String.format("posixClusteredShortOptionsAllowed=%s, stopAtPositional=%s, stopAtUnmatched=%s, separator=%s, overwrittenOptionsAllowed=%s, unmatchedArgumentsAllowed=%s, expandAtFiles=%s, arityRestrictsCumulativeSize=%s",
Expand All @@ -3401,6 +3409,7 @@ void initFrom(ParserSpec settings) {
posixClusteredShortOptionsAllowed = settings.posixClusteredShortOptionsAllowed;
arityRestrictsCumulativeSize = settings.arityRestrictsCumulativeSize;
unmatchedOptionsArePositionalParams = settings.unmatchedOptionsArePositionalParams;
limitSplit = settings.limitSplit;
}
}
/** Models the shared attributes of {@link OptionSpec} and {@link PositionalParamSpec}.
Expand Down Expand Up @@ -3601,8 +3610,10 @@ protected boolean showDefaultValue(CommandSpec commandSpec) {
/** Returns a string respresentation of this option or positional parameter. */
public String toString() { return toString; }

private String[] splitValue(String value) {
return splitRegex().length() == 0 ? new String[] {value} : value.split(splitRegex());
private String[] splitValue(String value, ParserSpec parser, Range arity, int consumed) {
if (splitRegex().length() == 0) { return new String[] {value}; }
int limit = parser.limitSplit() ? Math.max(arity.max - consumed, 0) : 0;
return value.split(splitRegex(), limit);
}
protected boolean equalsImpl(ArgSpec other) {
if (other == this) { return true; }
Expand Down Expand Up @@ -4828,7 +4839,7 @@ private void parse(List<CommandLine> parsedCommands, Stack<String> argumentStack
if (missing.isOption()) {
throw MissingParameterException.create(CommandLine.this, required, config().separator());
} else {
assertNoMissingParameters(missing, missing.arity().min, argumentStack);
assertNoMissingParameters(missing, missing.arity(), argumentStack);
}
}
}
Expand Down Expand Up @@ -5002,7 +5013,7 @@ private void processPositionalParameter(Collection<ArgSpec> required, Set<ArgSpe
Stack<String> argsCopy = copy(args);
Range arity = positionalParam.arity();
if (tracer.isDebug()) {tracer.debug("Position %d is in index range %s. Trying to assign args to %s, arity=%s%n", position, indexRange, positionalParam, arity);}
assertNoMissingParameters(positionalParam, arity.min, argsCopy);
assertNoMissingParameters(positionalParam, arity, argsCopy);
int originalSize = argsCopy.size();
applyOption(positionalParam, arity, argsCopy, initialized, "args[" + indexRange + "] at position " + position);
int count = originalSize - argsCopy.size();
Expand Down Expand Up @@ -5104,7 +5115,7 @@ private int applyOption(ArgSpec argSpec,
Set<ArgSpec> initialized,
String argDescription) throws Exception {
updateHelpRequested(argSpec);
assertNoMissingParameters(argSpec, arity.min, args);
assertNoMissingParameters(argSpec, arity, args);

if (argSpec.type().isArray()) {
return applyValuesToArrayField(argSpec, arity, args, initialized, argDescription);
Expand Down Expand Up @@ -5216,35 +5227,40 @@ private void consumeMapArguments(ArgSpec argSpec,
int currentPosition = position;

// first do the arity.min mandatory parameters
for (int i = 0; i < arity.min; i++) {
int initialSize = argSpec.stringValues().size();
int consumed = consumedCountMap(0, initialSize, argSpec);
for (int i = 0; consumed < arity.min && !args.isEmpty(); i++) {
Map<Object, Object> typedValuesAtPosition = new LinkedHashMap<Object, Object>();
parseResult.addTypedValues(argSpec, currentPosition++, typedValuesAtPosition);
consumeOneMapArgument(argSpec, args.pop(), classes, keyConverter, valueConverter, typedValuesAtPosition, i, argDescription);
consumeOneMapArgument(argSpec, arity, consumed, args.pop(), classes, keyConverter, valueConverter, typedValuesAtPosition, i, argDescription);
result.putAll(typedValuesAtPosition);
consumed = consumedCountMap(i + 1, initialSize, argSpec);
}
// now process the varargs if any
for (int i = arity.min; i < arity.max && !args.isEmpty(); i++) {
for (int i = consumed; consumed < arity.max && !args.isEmpty(); i++) {
if (!varargCanConsumeNextValue(argSpec, args.peek())) { break; }

Map<Object, Object> typedValuesAtPosition = new LinkedHashMap<Object, Object>();
parseResult.addTypedValues(argSpec, currentPosition++, typedValuesAtPosition);
if (!canConsumeOneMapArgument(argSpec, args.peek(), classes, keyConverter, valueConverter, argDescription)) {
if (!canConsumeOneMapArgument(argSpec, arity, consumed, args.peek(), classes, keyConverter, valueConverter, argDescription)) {
break; // leave empty map at argSpec.typedValues[currentPosition] so we won't try to consume that position again
}
consumeOneMapArgument(argSpec, args.pop(), classes, keyConverter, valueConverter, typedValuesAtPosition, i, argDescription);
consumeOneMapArgument(argSpec, arity, consumed, args.pop(), classes, keyConverter, valueConverter, typedValuesAtPosition, i, argDescription);
result.putAll(typedValuesAtPosition);
consumed = consumedCountMap(i + 1, initialSize, argSpec);
}
}

private void consumeOneMapArgument(ArgSpec argSpec,
Range arity, int consumed,
String arg,
Class<?>[] classes,
ITypeConverter<?> keyConverter, ITypeConverter<?> valueConverter,
Map<Object, Object> result,
int index,
String argDescription) throws Exception {
String argDescription) {
String raw = trim(arg);
String[] values = argSpec.splitValue(raw);
String[] values = argSpec.splitValue(raw, commandSpec.parser(), arity, consumed);
for (String value : values) {
String[] keyValue = splitKeyValue(argSpec, value);
Object mapKey = tryConvert(argSpec, index, keyConverter, keyValue[0], classes[0]);
Expand All @@ -5258,10 +5274,11 @@ private void consumeOneMapArgument(ArgSpec argSpec,
parseResult.addOriginalStringValue(argSpec, raw);
}

private boolean canConsumeOneMapArgument(ArgSpec argSpec, String raw, Class<?>[] classes,
private boolean canConsumeOneMapArgument(ArgSpec argSpec, Range arity, int consumed,
String raw, Class<?>[] classes,
ITypeConverter<?> keyConverter, ITypeConverter<?> valueConverter,
String argDescription) {
String[] values = argSpec.splitValue(raw);
String[] values = argSpec.splitValue(raw, commandSpec.parser(), arity, consumed);
if (!argSpec.acceptsValues(values.length, commandSpec.parser())) {
tracer.debug("$s would split into %s values but %s cannot accept that many values.%n", raw, values.length, argDescription);
return false;
Expand Down Expand Up @@ -5378,39 +5395,52 @@ private List<Object> consumeArguments(ArgSpec argSpec,
int currentPosition = position;

// first do the arity.min mandatory parameters
for (int i = 0; i < arity.min; i++) {
int initialSize = argSpec.stringValues().size();
int consumed = consumedCount(0, initialSize, argSpec);
for (int i = 0; consumed < arity.min && !args.isEmpty(); i++) {
List<Object> typedValuesAtPosition = new ArrayList<Object>();
parseResult.addTypedValues(argSpec, currentPosition++, typedValuesAtPosition);
consumeOneArgument(argSpec, arity, args.pop(), type, typedValuesAtPosition, i, argDescription);
consumeOneArgument(argSpec, arity, consumed, args.pop(), type, typedValuesAtPosition, i, argDescription);
result.addAll(typedValuesAtPosition);
consumed = consumedCount(i + 1, initialSize, argSpec);
}
// now process the varargs if any
for (int i = arity.min; i < arity.max && !args.isEmpty(); i++) {
for (int i = consumed; consumed < arity.max && !args.isEmpty(); i++) {
if (!varargCanConsumeNextValue(argSpec, args.peek())) { break; }

List<Object> typedValuesAtPosition = new ArrayList<Object>();
parseResult.addTypedValues(argSpec, currentPosition++, typedValuesAtPosition);
if (!canConsumeOneArgument(argSpec, args.peek(), type, argDescription)) {
if (!canConsumeOneArgument(argSpec, arity, consumed, args.peek(), type, argDescription)) {
break; // leave empty list at argSpec.typedValues[currentPosition] so we won't try to consume that position again
}
consumeOneArgument(argSpec, arity, args.pop(), type, typedValuesAtPosition, i, argDescription);
consumeOneArgument(argSpec, arity, consumed, args.pop(), type, typedValuesAtPosition, i, argDescription);
result.addAll(typedValuesAtPosition);
consumed = consumedCount(i + 1, initialSize, argSpec);
}
if (result.isEmpty() && arity.min == 0 && arity.max <= 1 && isBoolean(type)) {
return Arrays.asList((Object) Boolean.TRUE);
}
return result;
}

private int consumedCount(int i, int initialSize, ArgSpec arg) {
return commandSpec.parser().splitFirst() ? arg.stringValues().size() - initialSize : i;
}

private int consumedCountMap(int i, int initialSize, ArgSpec arg) {
return commandSpec.parser().splitFirst() ? (arg.stringValues().size() - initialSize) / 2 : i;
}

private int consumeOneArgument(ArgSpec argSpec,
Range arity,
int consumed,
String arg,
Class<?> type,
List<Object> result,
int index,
String argDescription) {
String raw = trim(arg);
String[] values = argSpec.splitValue(raw);
String[] values = argSpec.splitValue(raw, commandSpec.parser(), arity, consumed);
ITypeConverter<?> converter = getTypeConverter(type, argSpec, 0);
for (int j = 0; j < values.length; j++) {
result.add(tryConvert(argSpec, index, converter, values[j], type));
Expand All @@ -5422,10 +5452,10 @@ private int consumeOneArgument(ArgSpec argSpec,
parseResult.addOriginalStringValue(argSpec, raw);
return ++index;
}
private boolean canConsumeOneArgument(ArgSpec argSpec, String arg, Class<?> type, String argDescription) {
private boolean canConsumeOneArgument(ArgSpec argSpec, Range arity, int consumed, String arg, Class<?> type, String argDescription) {
ITypeConverter<?> converter = getTypeConverter(type, argSpec, 0);
try {
String[] values = argSpec.splitValue(trim(arg));
String[] values = argSpec.splitValue(trim(arg), commandSpec.parser(), arity, consumed);
if (!argSpec.acceptsValues(values.length, commandSpec.parser())) {
tracer.debug("$s would split into %s values but %s cannot accept that many values.%n", arg, values.length, argDescription);
return false;
Expand Down Expand Up @@ -5554,9 +5584,13 @@ public Object convert(String value) throws Exception {
throw new MissingTypeConverterException(CommandLine.this, "No TypeConverter registered for " + type.getName() + " of " + argSpec);
}

private void assertNoMissingParameters(ArgSpec argSpec, int arity, Stack<String> args) {
if (arity > args.size()) {
if (arity == 1) {
private void assertNoMissingParameters(ArgSpec argSpec, Range arity, Stack<String> args) {
int available = args.size();
if (available > 0 && commandSpec.parser().splitFirst() && argSpec.splitRegex().length() > 0) {
available += argSpec.splitValue(args.peek(), commandSpec.parser(), arity, 0).length - 1;
}
if (arity.min > available) {
if (arity.min == 1) {
if (argSpec.isOption()) {
throw new MissingParameterException(CommandLine.this, argSpec, "Missing required parameter for " +
optionDescription("", argSpec, 0));
Expand Down Expand Up @@ -5584,10 +5618,10 @@ private void assertNoMissingParameters(ArgSpec argSpec, int arity, Stack<String>
}
if (args.isEmpty()) {
throw new MissingParameterException(CommandLine.this, argSpec, optionDescription("", argSpec, 0) +
" requires at least " + arity + " values, but none were specified.");
" requires at least " + arity.min + " values, but none were specified.");
}
throw new MissingParameterException(CommandLine.this, argSpec, optionDescription("", argSpec, 0) +
" requires at least " + arity + " values, but only " + args.size() + " were specified: " + reverse(args));
" requires at least " + arity.min + " values, but only " + available + " were specified: " + reverse(args));
}
}
private String trim(String value) {
Expand Down
11 changes: 6 additions & 5 deletions src/test/java/picocli/CommandLineArityTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1040,12 +1040,13 @@ class Cmd {
assertEquals(Arrays.asList("xx", "--alpha", "--beta"), cmd.params);
}

@Ignore
@Test
public void testStopProcessingVarargsWhenCumulativeSizeReached() {
class ValSepC {
@Option(names = "-a", arity="1..2") String[] a;
@Option(names = "-b", arity="1..2", split=",") String[] b;
@Option(names = "-c", arity="1..*", split=",") String[] c;
@Option(names = "-a", arity="2") String[] a;
@Option(names = "-b", arity="2", split=",") String[] b;
@Option(names = "-c", arity="*", split=",") String[] c;
@Option(names = "-d") boolean d;
@Option(names = "-e", arity="1", split=",") boolean e;
@Unmatched String[] remaining;
Expand Down Expand Up @@ -1079,7 +1080,7 @@ class ValSepC {
assertTrue(val8.e);
}

@Ignore
//@Ignore
@Test
public void testCommonsCliCompatibleSeparatorHandling() {
class ValSepC {
Expand All @@ -1093,7 +1094,7 @@ class ValSepC {
}
private <T> T parseRestrictingCumulativeSize(T obj, String[] args) {
CommandLine cmd = new CommandLine(obj);
cmd.getCommandSpec().parser().arityRestrictsCumulativeSize(true);
cmd.getCommandSpec().parser().limitSplit(true); //arityRestrictsCumulativeSize(true);
cmd.parseArgs(args);
return obj;
}
Expand Down

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