Examples of org.exist.xquery.value.Sequence.effectiveBooleanValue()

org.exist.xquery.value.Sequence.effectiveBooleanValue()
Get the effective boolean value of this sequence. Will be false if the sequence is empty, true otherwise. @throws XPathException

                        {((NodeProxy)contextItem).addContextNode(getExpressionId(), (NodeProxy)contextItem);}
                    final Sequence bool = applyWhereExpression(null);
                    if (contextItem instanceof NodeProxy)
                        {((NodeProxy)contextItem).clearContext(getExpressionId());}
                    // if where returned false, continue
                    if (!bool.effectiveBooleanValue())
                        {continue;}
                } else {
                    val = contextItem.toSequence();
                }
                //Reset the context position

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                " (or more specific), got " + Type.getTypeName(item.getType()), inSeq);}
            //trigger the old behaviour
            else {var.checkType();}
            }  
            
      found = satisfiesSeq.effectiveBooleanValue();
      if ((mode == SOME ) && found)
        {break;}
      if ((mode == EVERY) && !found)
        {break;}
    }

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   * @param arg
   * @throws XPathException
   */
  private Sequence evalBoolean(Sequence contextSequence, Item contextItem, Expression arg) throws XPathException {
        final Sequence seq = arg.eval(contextSequence, contextItem);
    return seq.effectiveBooleanValue() ? BooleanValue.FALSE : BooleanValue.TRUE;
  }
}

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    try {
      seq = xquery.execute(compiled, null);
    } finally {
      pool.returnCompiledXQuery(source, compiled);
    }
    if(seq.effectiveBooleanValue()) {
      long mods = 0;
      for (final Modification modification : modifications) {
        mods += modification.process(transaction);
        broker.flush();
      }

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     */
    public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
        context.expressionStart(this);
        final Sequence testSeq = testExpr.eval(contextSequence, contextItem);
        try {
            if (testSeq.effectiveBooleanValue()) {
                return thenExpr.eval(contextSequence, contextItem);
            } else {
                return elseExpr.eval(contextSequence, contextItem);
            }
        } catch (final XPathException e) {

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                    if (filtered.isEmpty()) {
                        if (context.getProfiler().isEnabled())
                            {context.getProfiler().end(this, "", Sequence.EMPTY_SEQUENCE);}
                        return Sequence.EMPTY_SEQUENCE;
                    } else if (filtered.getItemType() == Type.BOOLEAN &&
                               !filtered.effectiveBooleanValue()) {
                        if (context.getProfiler().isEnabled())
                            {context.getProfiler().end(this, "", Sequence.EMPTY_SEQUENCE);}
                        return Sequence.EMPTY_SEQUENCE;
                    }
                }

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            ref.analyze(cachedContextInfo);
          for (final SequenceIterator i = seq.iterate(); i.hasNext(); ) {
            final Item item = i.nextItem();
            final Sequence r = ref.evalFunction(contextSequence, null, new Sequence[] { item.toSequence() });
            if (r.effectiveBooleanValue())
              {result.add(item);}
          }
        } else if (isCalledAs("fold-left")) {
            final FunctionReference ref = (FunctionReference) args[2].itemAt(0);
            ref.analyze(cachedContextInfo);

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    if (! (ms2.itemAt(0) == null)) 
      {ms2Node = ((NodeValue) ms2.itemAt(0)).getNode();}
    boolean pathCompletion = true;  // default
    if (argumentCount > 2) {
      final Sequence seqPathCompletion = getArgument(2).eval(contextSequence, contextItem);    
      pathCompletion = seqPathCompletion.effectiveBooleanValue();
    }
    boolean displayRootNamespace = false;  // default
    if (argumentCount > 3) {
      final Sequence seqDisplayRootNamespace = getArgument(3).eval(contextSequence, contextItem);    
      displayRootNamespace = seqDisplayRootNamespace.effectiveBooleanValue();

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      pathCompletion = seqPathCompletion.effectiveBooleanValue();
    }
    boolean displayRootNamespace = false;  // default
    if (argumentCount > 3) {
      final Sequence seqDisplayRootNamespace = getArgument(3).eval(contextSequence, contextItem);    
      displayRootNamespace = seqDisplayRootNamespace.effectiveBooleanValue();
    }
    // fetch the fragment between the two milestones
    final StringBuilder fragment = getFragmentBetween(ms1Node, ms2Node);
    if (pathCompletion) {
      final String msFromPathName = getNodeXPath(ms1Node.getParentNode(), displayRootNamespace);

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            for (final SequenceIterator i = contextSequence.iterate(); i.hasNext(); p--) {
                // 0-based
                context.setContextSequencePosition(p - 1, contextSequence);
                final Item item = i.nextItem();
                final Sequence innerSeq = inner.eval(contextSequence, item);
                if (innerSeq.effectiveBooleanValue())
                    {result.add(item);}
            }
        } else {
            // 0-based
            p = 0;

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