Flag.java
/*
* 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;
import gov.nist.secauto.metaschema.core.metapath.item.ItemUtils;
import gov.nist.secauto.metaschema.core.metapath.item.node.IFlagNodeItem;
import gov.nist.secauto.metaschema.core.metapath.item.node.INodeItem;
import java.util.stream.Stream;
import edu.umd.cs.findbugs.annotations.NonNull;
class Flag // NOPMD - intentional name
extends AbstractNamedInstanceExpression<IFlagNodeItem> {
/**
* Construct a new expression that finds any child {@link IFlagNodeItem} that
* matches the provided {@code test}.
*
* @param test
* the test to use to match
*/
protected Flag(@NonNull IExpression test) {
super(test);
}
@Override
public Class<IFlagNodeItem> getBaseResultType() {
return IFlagNodeItem.class;
}
@Override
public <RESULT, CONTEXT> RESULT accept(IExpressionVisitor<RESULT, CONTEXT> visitor, CONTEXT context) {
return visitor.visitFlag(this, context);
}
@Override
public ISequence<? extends IFlagNodeItem> accept(
DynamicContext dynamicContext,
ISequence<?> focus) {
return ISequence.of(focus.asStream()
.map(item -> ItemUtils.checkItemIsNodeItemForStep(item))
.flatMap(item -> {
assert item != null;
return match(item);
}));
}
/**
* Get a stream of matching child node items for the provided {@code context}.
*
* @param focusedItem
* the node item to match child items of
* @return the stream of matching node items
*/
@SuppressWarnings("null")
@NonNull
protected Stream<? extends IFlagNodeItem> match(@NonNull INodeItem focusedItem) {
Stream<? extends IFlagNodeItem> retval;
if (getTest() instanceof Name) {
String name = ((Name) getTest()).getValue();
IFlagNodeItem item = focusedItem.getFlagByName(name);
retval = item == null ? Stream.empty() : Stream.of(item);
} else {
// wildcard
retval = focusedItem.flags();
}
return retval;
}
}