com.saxonica.ee.validate

Class CompactStringValue

java.lang.Object

com.saxonica.ee.validate.CompactStringValue

All Implemented Interfaces:

Iterable<AtomicValue>, AtomicSequence, GroundedValue, Sequence

public class CompactStringValue
extends Object
implements AtomicSequence

A compact representation of an atomic xs:string value used in saved tables for key and keyref constraints, designed to economize on space.

Since:

9.6

Constructor Summary

Constructors

Constructor and Description
CompactStringValue(String content)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	effectiveBooleanValue() Get the effective boolean value of this sequence
CharSequence	getCanonicalLexicalRepresentation() Get the canonical lexical representation as defined in XML Schema.
int	getLength() Get the size of the value (the number of items)
Comparable	getSchemaComparable() Get a Comparable value that implements the XML Schema ordering comparison semantics for this value.
String	getStringValue() Get the string value of this sequence.
CharSequence	getStringValueCS() Get the string value of this sequence.
AtomicValue	head() Get the first item in the sequence.
AtomicValue	itemAt(int n) Get the n'th item in the value, counting from 0
AtomicIterator	iterate() Get an iterator over all the items in the sequence
Iterator<AtomicValue>	iterator()
GroundedValue	reduce() Reduce the sequence to its simplest form.
GroundedValue	subsequence(int start, int length) Get a subsequence of the value
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CompactStringValue

public CompactStringValue(String content)

Method Detail

head

public AtomicValue head()

Description copied from interface: Sequence

Get the first item in the sequence.

Specified by:

head in interface AtomicSequence

Specified by:

head in interface GroundedValue

Specified by:

head in interface Sequence

Returns:

the first item in the sequence if there is one, or null if the sequence is empty

iterate

public AtomicIterator iterate()

Description copied from interface: Sequence

Get an iterator over all the items in the sequence

Specified by:

iterate in interface AtomicSequence

Specified by:

iterate in interface GroundedValue

Specified by:

iterate in interface Sequence

Returns:

an iterator over all the items

itemAt

public AtomicValue itemAt(int n)

Description copied from interface: GroundedValue

Get the n'th item in the value, counting from 0

Specified by:

itemAt in interface AtomicSequence

Specified by:

itemAt in interface GroundedValue

Parameters:

n - the index of the required item, with 0 representing the first item in the sequence

Returns:

the n'th item if it exists, or null otherwise

getLength

public int getLength()

Description copied from interface: GroundedValue

Get the size of the value (the number of items)

Specified by:

getLength in interface AtomicSequence

Specified by:

getLength in interface GroundedValue

Returns:

the number of items in the sequence

getCanonicalLexicalRepresentation

public CharSequence getCanonicalLexicalRepresentation()

Description copied from interface: AtomicSequence

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

Returns:

the canonical lexical representation if defined in XML Schema; otherwise, the result of casting to string according to the XPath 2.0 rules

getSchemaComparable

public Comparable getSchemaComparable()

Description copied from interface: AtomicSequence

Get a Comparable value that implements the XML Schema ordering comparison semantics for this value. The default implementation is written to compare sequences of atomic values. This method is overridden for AtomicValue and its subclasses.

In the case of data types that are partially ordered, the returned Comparable extends the standard semantics of the compareTo() method by returning the value SequenceTool.INDETERMINATE_ORDERING when there is no defined order relationship between two given values.

Specified by:

getSchemaComparable in interface AtomicSequence

Returns:

a Comparable that follows XML Schema comparison rules

getStringValueCS

public CharSequence getStringValueCS()

Description copied from interface: GroundedValue

Get the string value of this sequence. The string value of an item is the result of applying the string() function. The string value of a sequence is the space-separated result of applying the string-join() function using a single space as the separator

Specified by:

getStringValueCS in interface AtomicSequence

Specified by:

getStringValueCS in interface GroundedValue

Returns:

the string value of the sequence.

getStringValue

public String getStringValue()

Description copied from interface: GroundedValue

Get the string value of this sequence. The string value of an item is the result of applying the string() function. The string value of a sequence is the space-separated result of applying the string-join() function using a single space as the separator

Specified by:

getStringValue in interface AtomicSequence

Specified by:

getStringValue in interface GroundedValue

Returns:

the string value of the sequence.

subsequence

public GroundedValue subsequence(int start,
                        int length)

Description copied from interface: GroundedValue

Get a subsequence of the value

Specified by:

subsequence in interface GroundedValue

Parameters:

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

Returns:

the required subsequence.

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

Returns:

the effective boolean value

Throws:

XPathException - if the sequence has no effective boolean value (for example a sequence of two integers)

reduce

public GroundedValue reduce()

Description copied from interface: GroundedValue

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 One. Otherwise, the result will typically be unchanged.

Specified by:

reduce in interface GroundedValue

Returns:

the simplified sequence

iterator

public Iterator<AtomicValue> iterator()

Specified by:

iterator in interface Iterable<AtomicValue>

toString

public String toString()

Overrides:

toString in class Object