Or.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.function.library.FnBoolean;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IBooleanItem;

import java.util.Arrays;
import java.util.List;

import edu.umd.cs.findbugs.annotations.NonNull;

class Or // NOPMD - intentional name
    extends AbstractNAryExpression
    implements IBooleanLogicExpression {

  @SuppressWarnings("null")
  protected Or(@NonNull IExpression... expressions) {
    this(Arrays.asList(expressions));
  }

  /**
   * Determines the logical disjunction of the result of evaluating a list of
   * expressions. The boolean result of each expression is determined by applying
   * {@link FnBoolean#fnBooleanAsPrimitive(ISequence)} to each function's
   * {@link ISequence} result.
   *
   * @param expressions
   *          the list of expressions
   */
  protected Or(@NonNull List<IExpression> expressions) {
    super(expressions);
  }

  @Override
  public <RESULT, CONTEXT> RESULT accept(IExpressionVisitor<RESULT, CONTEXT> visitor, CONTEXT context) {
    return visitor.visitOr(this, context);
  }

  @Override
  public ISequence<? extends IBooleanItem> accept(DynamicContext dynamicContext, ISequence<?> focus) {
    boolean retval = false;
    for (IExpression child : getChildren()) {
      ISequence<?> result = child.accept(dynamicContext, focus);
      if (FnBoolean.fnBooleanAsPrimitive(result)) {
        retval = true;
        break;
      }
    }
    return ISequence.of(IBooleanItem.valueOf(retval));
  }
}