Class AtomicArray

  • All Implemented Interfaces:
    java.lang.Iterable<AtomicValue>, AtomicSequence, GroundedValue, Sequence

    public class AtomicArray
    extends java.lang.Object
    implements AtomicSequence
    A sequence of atomic values, implemented using an underlying arrayList.

    Often used for representing the typed value of a list-valued node.

    • Field Detail


        public static AtomicArray EMPTY_ATOMIC_ARRAY
    • Constructor Detail

      • AtomicArray

        public AtomicArray​(java.util.List<AtomicValue> content)
        Create an AtomicArray over a supplied arrayList of atomic values
        content - the supplied arrayList. The caller warrants that the contents of this array will not change.
      • AtomicArray

        public AtomicArray​(SequenceIterator iter)
                    throws XPathException
        Create an AtomicArray supplying the contents as an iterator
        iter - the iterator that supplies the atomic values (which must be positioned at the start of the sequence, and which will be consumed by the method).
        XPathException - if evaluation of the SequenceIterator fails
        java.lang.ClassCastException - if any of the items returned by the SequenceIterator is not atomic
    • Method Detail

      • itemAt

        public AtomicValue itemAt​(int n)
        Get the n'th item in the sequence (base-zero addressing)
        Specified by:
        itemAt in interface AtomicSequence
        Specified by:
        itemAt in interface GroundedValue
        n - the index of the required item, the first item being zero
        the n'th item if n is in range, or null otherwise
      • subsequence

        public AtomicArray subsequence​(int start,
                                       int length)
        Get a subsequence of this sequence
        Specified by:
        subsequence in interface GroundedValue
        start - the index of the first item to be included in the result, counting from zero. A negative value is taken as zero. If the value is beyond the end of the sequence, an empty sequence is returned
        length - the number of items to be included in the result. Specify Integer.MAX_VALUE to get the subsequence up to the end of the base sequence. If the value is negative, an empty sequence is returned. If the value goes off the end of the sequence, the result returns items up to the end of the sequence
        the required subsequence
      • getCanonicalLexicalRepresentation

        public UnicodeString getCanonicalLexicalRepresentation()
        Get the canonical lexical representation as defined in XML Schema. This is not always the same as the result of casting to a string according to the XPath rules.
        Specified by:
        getCanonicalLexicalRepresentation in interface AtomicSequence
        the canonical lexical representation if defined in XML Schema; otherwise, the result of casting to string according to the XPath 2.0 rules
      • getStringValue

        public java.lang.String getStringValue()
        Get the value of the item as a UnicodeString. This is in some cases more efficient than the version of the method that returns a String.
        Specified by:
        getStringValue in interface GroundedValue
        the string value, as a UnicodeString
      • effectiveBooleanValue

        public boolean effectiveBooleanValue()
                                      throws XPathException
        Description copied from interface: GroundedValue
        Get the effective boolean value of this sequence
        Specified by:
        effectiveBooleanValue in interface GroundedValue
        the effective boolean value
        XPathException - if the sequence has no effective boolean value (for example a sequence of two integers)
      • reduce

        public GroundedValue reduce()
        Reduce the sequence to its simplest form. If the value is an empty sequence, the result will be EmptySequence.getInstance(). If the value is a single atomic value, the result will be an instance of AtomicValue. If the value is a single item of any other kind, the result will be an instance of SingletonItem. Otherwise, the result will typically be unchanged.
        Specified by:
        reduce in interface GroundedValue
        the simplified sequence
      • iterator

        public java.util.Iterator<AtomicValue> iterator()
        Returns a Java iterator over the atomic sequence.
        Specified by:
        iterator in interface java.lang.Iterable<AtomicValue>
        an Iterator.