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Implemented array postfix and unary lookups.
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179
core/src/main/java/gov/nist/secauto/metaschema/core/metapath/cst/AbstractLookup.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| /* | ||
| * Portions of this software was developed by employees of the National Institute | ||
| * of Standards and Technology (NIST), an agency of the Federal Government and is | ||
| * being made available as a public service. Pursuant to title 17 United States | ||
| * Code Section 105, works of NIST employees are not subject to copyright | ||
| * protection in the United States. This software may be subject to foreign | ||
| * copyright. Permission in the United States and in foreign countries, to the | ||
| * extent that NIST may hold copyright, to use, copy, modify, create derivative | ||
| * works, and distribute this software and its documentation without fee is hereby | ||
| * granted on a non-exclusive basis, provided that this notice and disclaimer | ||
| * of warranty appears in all copies. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER | ||
| * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY | ||
| * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF | ||
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM | ||
| * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE | ||
| * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT | ||
| * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT, | ||
| * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, | ||
| * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY, | ||
| * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR | ||
| * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT | ||
| * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER. | ||
| */ | ||
|
|
||
| package gov.nist.secauto.metaschema.core.metapath.cst; | ||
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| import gov.nist.secauto.metaschema.core.metapath.DynamicContext; | ||
| import gov.nist.secauto.metaschema.core.metapath.ISequence; | ||
| import gov.nist.secauto.metaschema.core.metapath.InvalidTypeMetapathException; | ||
| import gov.nist.secauto.metaschema.core.metapath.function.library.FnData; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.IItem; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.atomic.IAnyAtomicItem; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.atomic.IIntegerItem; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.function.ArrayException; | ||
| import gov.nist.secauto.metaschema.core.metapath.item.function.IArrayItem; | ||
|
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| import java.util.stream.Stream; | ||
|
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| import edu.umd.cs.findbugs.annotations.NonNull; | ||
|
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| public abstract class AbstractLookup implements IExpression { | ||
| @NonNull | ||
| private final IKeySpecifier keySpecifier; | ||
|
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| protected AbstractLookup(@NonNull IKeySpecifier keySpecifier) { | ||
| this.keySpecifier = keySpecifier; | ||
| } | ||
|
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| @NonNull | ||
| public IKeySpecifier getKeySpecifier() { | ||
| return keySpecifier; | ||
| } | ||
|
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| protected interface IKeySpecifier { | ||
|
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| default Stream<? extends IItem> lookup( | ||
| @NonNull IItem item, | ||
| @NonNull DynamicContext dynamicContext, | ||
| @NonNull ISequence<?> focus) { | ||
| Stream<? extends IItem> result; | ||
| if (item instanceof IArrayItem) { | ||
| result = lookupInArray((IArrayItem<?>) item, dynamicContext, focus); | ||
| } else { | ||
| throw new InvalidTypeMetapathException(item, | ||
| String.format("Item type '%s' is not an array or map.", item.getClass().getName())); | ||
| } | ||
| return result; | ||
| } | ||
|
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| Stream<? extends IItem> lookupInArray( | ||
| @NonNull IArrayItem<?> item, | ||
| @NonNull DynamicContext dynamicContext, | ||
| @NonNull ISequence<?> focus); | ||
| } | ||
|
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| protected static class NCNameKeySpecifier implements IKeySpecifier { | ||
| @NonNull | ||
| private final String name; | ||
|
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| public NCNameKeySpecifier(String name) { | ||
| this.name = name; | ||
| } | ||
|
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| public String getName() { | ||
| return name; | ||
| } | ||
|
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| @Override | ||
| public Stream<? extends IItem> lookupInArray( | ||
| IArrayItem<?> item, | ||
| DynamicContext dynamicContext, | ||
| ISequence<?> focus) { | ||
| throw new InvalidTypeMetapathException(item, | ||
| String.format("The key name-based lookup '%s' is not appropriate for an array.", getName())); | ||
| } | ||
| } | ||
|
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| protected static class IntegerLiteralKeySpecifier implements IKeySpecifier { | ||
| private final int index; | ||
|
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| public IntegerLiteralKeySpecifier(IIntegerItem literal) { | ||
| index = literal.asInteger().intValueExact() - 1; | ||
| } | ||
|
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| @Override | ||
| public Stream<? extends IItem> lookupInArray( | ||
| IArrayItem<?> item, | ||
| DynamicContext dynamicContext, | ||
| ISequence<?> focus) { | ||
| try { | ||
| return Stream.of(item.get(index)); | ||
| } catch (IndexOutOfBoundsException ex) { | ||
| throw new ArrayException( | ||
| ArrayException.INDEX_OUT_OF_BOUNDS, | ||
| String.format("The index %d is outside the range of values for the array size '%d'.", | ||
| index + 1, | ||
| item.size()), | ||
| ex); | ||
| } | ||
| } | ||
| } | ||
|
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| protected static class WildcardKeySpecifier implements IKeySpecifier { | ||
|
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| @Override | ||
| public Stream<? extends IItem> lookupInArray( | ||
| IArrayItem<?> item, | ||
| DynamicContext dynamicContext, | ||
| ISequence<?> focus) { | ||
| return item.stream(); | ||
| } | ||
| } | ||
|
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| public static class ParenthesizedExprKeySpecifier implements IKeySpecifier { | ||
| @NonNull | ||
| private final IExpression keyExpression; | ||
|
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| public ParenthesizedExprKeySpecifier(@NonNull IExpression keyExpression) { | ||
| this.keyExpression = keyExpression; | ||
| } | ||
|
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| public IExpression getKeyExpression() { | ||
| return keyExpression; | ||
| } | ||
|
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| @Override | ||
| public Stream<? extends IItem> lookupInArray( | ||
| IArrayItem<?> item, | ||
| DynamicContext dynamicContext, | ||
| ISequence<?> focus) { | ||
| ISequence<IAnyAtomicItem> keys = FnData.fnData(getKeyExpression().accept(dynamicContext, focus)); | ||
|
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| return keys.stream() | ||
| .map(key -> { | ||
| if (key instanceof IIntegerItem) { | ||
| int index = ((IIntegerItem) key).asInteger().intValueExact() - 1; | ||
| try { | ||
| return item.get(index); | ||
| } catch (IndexOutOfBoundsException ex) { | ||
| throw new ArrayException( | ||
| ArrayException.INDEX_OUT_OF_BOUNDS, | ||
| String.format("The index %d is outside the range of values for the array size '%d'.", | ||
| index + 1, | ||
| item.size()), | ||
| ex); | ||
| } | ||
| } | ||
| throw new InvalidTypeMetapathException(item, | ||
| String.format("The key '%s' of type '%s' is not appropriate for an array lookup.", | ||
| key.asString(), | ||
| key.getClass().getName())); | ||
|
|
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| }); | ||
| } | ||
| } | ||
|
|
||
| } |
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