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Added support for the Metapath zero-or-one, one-or-more, and exactly-…
…one functions. Resolves metaschema-framework#280
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83 changes: 83 additions & 0 deletions
83
...rc/main/java/gov/nist/secauto/metaschema/core/metapath/function/library/FnExactlyOne.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * SPDX-FileCopyrightText: none | ||
| * SPDX-License-Identifier: CC0-1.0 | ||
| */ | ||
|
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| package gov.nist.secauto.metaschema.core.metapath.function.library; | ||
|
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| import gov.nist.secauto.metaschema.core.metapath.DynamicContext; | ||
| import gov.nist.secauto.metaschema.core.metapath.MetapathConstants; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.IArgument; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.IFunction; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.InvalidArgumentFunctionException; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.IItem; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.ISequence; | ||
| import gov.nist.secauto.metaschema.core.util.ObjectUtils; | ||
|
|
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| import java.util.List; | ||
|
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| import edu.umd.cs.findbugs.annotations.NonNull; | ||
|
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| /** | ||
| * Implements the XPath 3.1 <a href= | ||
| * "https://www.w3.org/TR/xpath-functions-31/#func-exactly-one">fn:exactly-one</a> | ||
| * function. | ||
| */ | ||
| public final class FnExactlyOne { | ||
| private static final String NAME = "exactly-one"; | ||
| @NonNull | ||
| static final IFunction SIGNATURE = IFunction.builder() | ||
| .name(NAME) | ||
| .namespace(MetapathConstants.NS_METAPATH_FUNCTIONS) | ||
| .deterministic() | ||
| .contextIndependent() | ||
| .focusIndependent() | ||
| .argument(IArgument.builder() | ||
| .name("arg") | ||
| .type(IItem.type()) | ||
| .zeroOrMore() | ||
| .build()) | ||
| .returnType(IItem.type()) | ||
| .returnOne() | ||
| .functionHandler(FnExactlyOne::execute) | ||
| .build(); | ||
|
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| private FnExactlyOne() { | ||
| // disable construction | ||
| } | ||
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| @SuppressWarnings("unused") | ||
| @NonNull | ||
| private static ISequence<?> execute(@NonNull IFunction function, | ||
| @NonNull List<ISequence<?>> arguments, | ||
| @NonNull DynamicContext dynamicContext, | ||
| IItem focus) { | ||
| return fnExactlyOne(ObjectUtils.requireNonNull(arguments.get(0))); | ||
| } | ||
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| /** | ||
| * Check that the provided sequence has exactly one item. | ||
| * <p> | ||
| * Based on the XPath 3.1 <a href= | ||
| * "https://www.w3.org/TR/xpath-functions-31/#func-exactly-one">fn:exactly-one</a> | ||
| * function. | ||
| * | ||
| * @param sequence | ||
| * the sequence to evaluate | ||
| * @return the sequence if it has zero or one items | ||
| * @throws InvalidArgumentFunctionException | ||
| * with the code | ||
| * {@link InvalidArgumentFunctionException#INVALID_ARGUMENT_EXACTLY_ONE} | ||
| * if the sequence contains less or more than one item | ||
| */ | ||
| @NonNull | ||
| public static ISequence<?> fnExactlyOne(@NonNull ISequence<?> sequence) { | ||
| if (sequence.size() != 1) { | ||
| throw new InvalidArgumentFunctionException( | ||
| InvalidArgumentFunctionException.INVALID_ARGUMENT_EXACTLY_ONE, | ||
| String.format("fn:exactly-one called with the sequence '%s' containing a number of items other than one.", | ||
| sequence.toSignature())); | ||
| } | ||
| return sequence; | ||
| } | ||
| } |
83 changes: 83 additions & 0 deletions
83
...src/main/java/gov/nist/secauto/metaschema/core/metapath/function/library/FnOneOrMore.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * SPDX-FileCopyrightText: none | ||
| * SPDX-License-Identifier: CC0-1.0 | ||
| */ | ||
|
|
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| package gov.nist.secauto.metaschema.core.metapath.function.library; | ||
|
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| import gov.nist.secauto.metaschema.core.metapath.DynamicContext; | ||
| import gov.nist.secauto.metaschema.core.metapath.MetapathConstants; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.IArgument; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.IFunction; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.InvalidArgumentFunctionException; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.IItem; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.ISequence; | ||
| import gov.nist.secauto.metaschema.core.util.ObjectUtils; | ||
|
|
||
| import java.util.List; | ||
|
|
||
| import edu.umd.cs.findbugs.annotations.NonNull; | ||
|
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| /** | ||
| * Implements the XPath 3.1 <a href= | ||
| * "https://www.w3.org/TR/xpath-functions-31/#func-one-or-more">fn:one-or-more</a> | ||
| * function. | ||
| */ | ||
| public final class FnOneOrMore { | ||
| private static final String NAME = "one-or-more"; | ||
| @NonNull | ||
| static final IFunction SIGNATURE = IFunction.builder() | ||
| .name(NAME) | ||
| .namespace(MetapathConstants.NS_METAPATH_FUNCTIONS) | ||
| .deterministic() | ||
| .contextIndependent() | ||
| .focusIndependent() | ||
| .argument(IArgument.builder() | ||
| .name("arg") | ||
| .type(IItem.type()) | ||
| .zeroOrMore() | ||
| .build()) | ||
| .returnType(IItem.type()) | ||
| .returnOneOrMore() | ||
| .functionHandler(FnOneOrMore::execute) | ||
| .build(); | ||
|
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| private FnOneOrMore() { | ||
| // disable construction | ||
| } | ||
|
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| @SuppressWarnings("unused") | ||
| @NonNull | ||
| private static ISequence<?> execute(@NonNull IFunction function, | ||
| @NonNull List<ISequence<?>> arguments, | ||
| @NonNull DynamicContext dynamicContext, | ||
| IItem focus) { | ||
| return fnOneOrMore(ObjectUtils.requireNonNull(arguments.get(0))); | ||
| } | ||
|
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| /** | ||
| * Check that the provided sequence has one or more items. | ||
| * <p> | ||
| * Based on the XPath 3.1 <a href= | ||
| * "https://www.w3.org/TR/xpath-functions-31/#func-one-or-more">fn:one-or-more</a> | ||
| * function. | ||
| * | ||
| * @param sequence | ||
| * the sequence to evaluate | ||
| * @return the sequence if it has zero or one items | ||
| * @throws InvalidArgumentFunctionException | ||
| * with the code | ||
| * {@link InvalidArgumentFunctionException#INVALID_ARGUMENT_ONE_OR_MORE} | ||
| * if the sequence contains no items | ||
| */ | ||
| @NonNull | ||
| public static ISequence<?> fnOneOrMore(@NonNull ISequence<?> sequence) { | ||
| if (sequence.size() < 1) { | ||
| throw new InvalidArgumentFunctionException( | ||
| InvalidArgumentFunctionException.INVALID_ARGUMENT_ONE_OR_MORE, | ||
| String.format("fn:one-or-more called with the sequence '%s' containing less than one item.", | ||
| sequence.toSignature())); | ||
| } | ||
| return sequence; | ||
| } | ||
| } |
83 changes: 83 additions & 0 deletions
83
...src/main/java/gov/nist/secauto/metaschema/core/metapath/function/library/FnZeroOrOne.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * SPDX-FileCopyrightText: none | ||
| * SPDX-License-Identifier: CC0-1.0 | ||
| */ | ||
|
|
||
| package gov.nist.secauto.metaschema.core.metapath.function.library; | ||
|
|
||
| import gov.nist.secauto.metaschema.core.metapath.DynamicContext; | ||
| import gov.nist.secauto.metaschema.core.metapath.MetapathConstants; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.IArgument; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.IFunction; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.InvalidArgumentFunctionException; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.IItem; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.ISequence; | ||
| import gov.nist.secauto.metaschema.core.util.ObjectUtils; | ||
|
|
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| import java.util.List; | ||
|
|
||
| import edu.umd.cs.findbugs.annotations.NonNull; | ||
|
|
||
| /** | ||
| * Implements the XPath 3.1 <a href= | ||
| * "https://www.w3.org/TR/xpath-functions-31/#func-zero-or-one">fn:zero-or-one</a> | ||
| * function. | ||
| */ | ||
| public final class FnZeroOrOne { | ||
| private static final String NAME = "zero-or-one"; | ||
| @NonNull | ||
| static final IFunction SIGNATURE = IFunction.builder() | ||
| .name(NAME) | ||
| .namespace(MetapathConstants.NS_METAPATH_FUNCTIONS) | ||
| .deterministic() | ||
| .contextIndependent() | ||
| .focusIndependent() | ||
| .argument(IArgument.builder() | ||
| .name("arg") | ||
| .type(IItem.type()) | ||
| .zeroOrMore() | ||
| .build()) | ||
| .returnType(IItem.type()) | ||
| .returnZeroOrOne() | ||
| .functionHandler(FnZeroOrOne::execute) | ||
| .build(); | ||
|
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| private FnZeroOrOne() { | ||
| // disable construction | ||
| } | ||
|
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| @SuppressWarnings("unused") | ||
| @NonNull | ||
| private static ISequence<?> execute(@NonNull IFunction function, | ||
| @NonNull List<ISequence<?>> arguments, | ||
| @NonNull DynamicContext dynamicContext, | ||
| IItem focus) { | ||
| return fnZeroOrOne(ObjectUtils.requireNonNull(arguments.get(0))); | ||
| } | ||
|
|
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| /** | ||
| * Check that the provided sequence has zero or one items. | ||
| * <p> | ||
| * Based on the XPath 3.1 <a href= | ||
| * "https://www.w3.org/TR/xpath-functions-31/#func-zero-or-one">fn:zero-or-one</a> | ||
| * function. | ||
| * | ||
| * @param sequence | ||
| * the sequence to evaluate | ||
| * @return the sequence if it has zero or one items | ||
| * @throws InvalidArgumentFunctionException | ||
| * with the code | ||
| * {@link InvalidArgumentFunctionException#INVALID_ARGUMENT_ZERO_OR_ONE} | ||
| * if the sequence contains more than one item | ||
| */ | ||
| @NonNull | ||
| public static ISequence<?> fnZeroOrOne(@NonNull ISequence<?> sequence) { | ||
| if (sequence.size() > 1) { | ||
| throw new InvalidArgumentFunctionException( | ||
| InvalidArgumentFunctionException.INVALID_ARGUMENT_ZERO_OR_ONE, | ||
| String.format("fn:zero-or-one called with the sequence '%s' containing more than one item.", | ||
| sequence.toSignature())); | ||
| } | ||
| return sequence; | ||
| } | ||
| } |
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