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## net.sf.saxon.value
Class BooleanValue

    java.lang.Object
      net.sf.saxon.value.Value
          net.sf.saxon.value.AtomicValue
              net.sf.saxon.value.BooleanValue

All Implemented Interfaces:
  Serializable, Comparable, PullEvent, SequenceIterable, GroundedValue, Item, ValueRepresentation, ConversionResult

    public final class BooleanValue

extends AtomicValue
implements Comparable

A boolean XPath value

See Also:
  Serialized Form

Field Summary
`static BooleanValue` | `FALSE` The boolean value FALSE
`static BooleanValue` | `TRUE` The boolean value TRUE

Fields inherited from class net.sf.saxon.value.AtomicValue
`typeLabel`

Fields inherited from class net.sf.saxon.value.Value
`INDETERMINATE_ORDERING`

Fields inherited from interface net.sf.saxon.om.ValueRepresentation
`EMPTY_VALUE_ARRAY`

Constructor Summary
`BooleanValue(boolean value, AtomicType typeLabel)` Create a new Boolean value with a user-supplied type label.

Method Summary
`int` | `compareTo(Object other)` Compare the value to another boolean value
`ConversionResult` | `convertPrimitive(BuiltInAtomicType requiredType, boolean validate, ConversionRules rules)` Convert to target data type
`AtomicValue` | `copyAsSubType(AtomicType typeLabel)` Create a copy of this atomic value (usually so that the type label can be changed).
`boolean` | `effectiveBooleanValue()` Get the effective boolean value of this expression
`boolean` | `equals(Object other)` Determine whether two boolean values are equal
`static ConversionResult` | `fromString(CharSequence s)` Convert a string to a boolean value, using the XML Schema rules (including whitespace trimming)
`static BooleanValue` | `get(boolean value)` Factory method: get a BooleanValue
`boolean` | `getBooleanValue()` Get the value
`String` | `getPrimitiveStringValue()` Convert to string
`BuiltInAtomicType` | `getPrimitiveType()` Determine the primitive type of the value.
`Comparable` | `getSchemaComparable()` Get a Comparable value that implements the XML Schema ordering comparison semantics for this value.
`Object` | `getXPathComparable(boolean ordered, StringCollator collator, XPathContext context)` Get a Comparable value that implements the XPath ordering comparison semantics for this value.
`int` | `hashCode()` Get a hash code for comparing two BooleanValues
`String` | `toString()` Diagnostic display of this value as a string

Methods inherited from class net.sf.saxon.value.AtomicValue
`asAtomic, checkPermittedContents, convert, convert, convert, getCardinality, getComponent, getItemType, getLength, getStringValue, getStringValueCS, getTypedValue, getTypeLabel, isIdentical, isNaN, itemAt, iterate, process, setTypeLabel, subsequence`

Methods inherited from class net.sf.saxon.value.Value
`asItem, asItem, asIterator, asValue, convertToJava, fromItem, getCanonicalLexicalRepresentation, getIterator, iterate, reduce`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Field Detail

### TRUE

    public static final BooleanValue TRUE

  The boolean value TRUE

### FALSE

    public static final BooleanValue FALSE

  The boolean value FALSE

Constructor Detail

### BooleanValue

    public BooleanValue(boolean value,
                        AtomicType typeLabel)

  Create a new Boolean value with a user-supplied type label. It is the caller's responsibility to ensure that the value is valid for the subtype

  Parameters:
    `value` - the boolean value
    `typeLabel` - the type label, xs:boolean or a subtype

Method Detail

### get

    public static BooleanValue get(boolean value)

  Factory method: get a BooleanValue

  Parameters:
    `value` - true or false, to determine which boolean value is required
  Returns:
    the BooleanValue requested

### copyAsSubType

    public AtomicValue copyAsSubType(AtomicType typeLabel)

  Create a copy of this atomic value (usually so that the type label can be changed). The type label of the copy will be reset to the primitive type.

  Specified by:
    `copyAsSubType` in class `AtomicValue`
  Parameters:
    `typeLabel` - the atomic type label to be added to the copied value
  Returns:
    the copied value

### fromString

    public static ConversionResult fromString(CharSequence s)

  Convert a string to a boolean value, using the XML Schema rules (including whitespace trimming)

  Parameters:
    `s` - the input string
  Returns:
    the relevant BooleanValue if validation succeeds; or a ValidationFailure if not.

### getBooleanValue

    public boolean getBooleanValue()

  Get the value

  Returns:
    true or false, the actual boolean value of this BooleanValue

### effectiveBooleanValue

    public boolean effectiveBooleanValue()

  Get the effective boolean value of this expression

  Overrides:
    `effectiveBooleanValue` in class `AtomicValue`
  Returns:
    the boolean value

### getPrimitiveType

    public BuiltInAtomicType getPrimitiveType()

  Determine the primitive type of the value. This delivers the same answer as getItemType().getPrimitiveItemType(). The primitive types are the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration, and xs:untypedAtomic. For external objects, the result is AnyAtomicType.

  Specified by:
    `getPrimitiveType` in class `AtomicValue`
  Returns:
    the primitive type

### convertPrimitive

    public ConversionResult convertPrimitive(BuiltInAtomicType requiredType,
                                             boolean validate,
                                             ConversionRules rules)

  Convert to target data type

  Specified by:
    `convertPrimitive` in class `AtomicValue`
  Parameters:
    `requiredType` - an integer identifying the required atomic type
    `rules` -
    `validate` - true if validation is required. If set to false, the caller guarantees that the value is valid for the target data type, and that further validation is therefore not required. Note that a validation failure may be reported even if validation was not requested.
  Returns:
    an AtomicValue, a value of the required type

### getPrimitiveStringValue

    public String getPrimitiveStringValue()

  Convert to string

  Specified by:
    `getPrimitiveStringValue` in class `AtomicValue`
  Returns:
    "true" or "false"

### getSchemaComparable

    public Comparable getSchemaComparable()

  Get a Comparable value that implements the XML Schema ordering comparison semantics for this value. The default implementation returns "this". This is overridden for particular atomic types.

  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 `Value.INDETERMINATE_ORDERING` when there is no defined order relationship between two given values.

  Specified by:
    `getSchemaComparable` in class `AtomicValue`
  Returns:
    a Comparable that follows XML Schema comparison rules

### getXPathComparable

    public Object getXPathComparable(boolean ordered,
                                     StringCollator collator,
                                     XPathContext context)

  Get a Comparable value that implements the XPath ordering comparison semantics for this value. Returns null if the value is not comparable according to XPath rules. The default implementation returns null. This is overridden for types that allow ordered comparisons in XPath: numeric, boolean, string, date, time, dateTime, yearMonthDuration, dayTimeDuration, and anyURI.

  Specified by:
    `getXPathComparable` in class `AtomicValue`
  Parameters:
    `ordered` -
    `collator` -
    `context` -
  Returns:
    an Object whose equals() and hashCode() methods implement the XPath comparison semantics with respect to this atomic value. If ordered is specified, the result will either be null if no ordering is defined, or will be a Comparable

### compareTo

    public int compareTo(Object other)

  Compare the value to another boolean value

  Specified by:
    `compareTo` in interface `Comparable`
  Parameters:
    `other` - The other boolean value
  Returns:
    -1 if this one is the lower, 0 if they are equal, +1 if this one is the higher. False is considered to be less than true.
  Throws:
    `ClassCastException` - if the other value is not a BooleanValue (the parameter is declared as Object to satisfy the Comparable interface)

### equals

    public boolean equals(Object other)

  Determine whether two boolean values are equal

  Specified by:
    `equals` in class `AtomicValue`
  Parameters:
    `other` - the value to be compared to this value
  Returns:
    true if the other value is a boolean value and is equal to this value
  Throws:
    `ClassCastException` - if other value is not xs:boolean or derived therefrom

### hashCode

    public int hashCode()

  Get a hash code for comparing two BooleanValues

  Overrides:
    `hashCode` in class `Value`
  Returns:
    the hash code

### toString

    public String toString()

  Diagnostic display of this value as a string

  Overrides:
    `toString` in class `AtomicValue`
  Returns:
    a string representation of this value: "true()" or "false()"

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.