net.sf.saxon.value
Class UntypedAtomicValue
java.lang.Object
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+--net.sf.saxon.value.Value
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+--net.sf.saxon.value.AtomicValue
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+--net.sf.saxon.value.StringValue
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+--net.sf.saxon.value.UntypedAtomicValue
- All Implemented Interfaces:
- Expression, Item, java.io.Serializable
- public class UntypedAtomicValue
- extends StringValue
An Untyped Atomic value. This inherits from StringValue for implementation convenience, even
though an untypedAtomic value is not a String in the data model type hierarchy.
- See Also:
- Serialized Form
Method Summary |
int |
compareTo(java.lang.Object other,
java.util.Comparator collator)
Compare an untypedAtomic value with another value, using a given collator to perform
any string comparisons. |
AtomicValue |
convert(int requiredType,
XPathContext context)
Convert to target data type |
ItemType |
getItemType()
Return the type of the expression |
Methods inherited from class net.sf.saxon.value.AtomicValue |
convert, display, evaluateAsString, evaluateItem, getCardinality, getComponent, getImplementationMethod, getPrimitiveValue, getTypedValue, iterate, process |
Methods inherited from class net.sf.saxon.value.Value |
analyze, asItem, asValue, collapseWhitespace, convertJavaObjectToXPath, getDependencies, getParentExpression, getSpecialProperties, inverse, iterateSubExpressions, normalizeWhitespace, promote, simplify, stringToNumber, trimWhitespace |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
ZERO_LENGTH_UNTYPED
public static final UntypedAtomicValue ZERO_LENGTH_UNTYPED
UntypedAtomicValue
public UntypedAtomicValue(java.lang.CharSequence value)
- Constructor
- Parameters:
value
- the String value. Null is taken as equivalent to "".
getItemType
public ItemType getItemType()
- Return the type of the expression
- Specified by:
getItemType
in interface Expression
- Overrides:
getItemType
in class StringValue
- Returns:
- Type.UNTYPED_ATOMIC (always)
convert
public AtomicValue convert(int requiredType,
XPathContext context)
throws XPathException
- Convert to target data type
- Overrides:
convert
in class StringValue
- Parameters:
requiredType
- an integer identifying the required atomic type
- Returns:
- an AtomicValue, a value of the required type
- Throws:
XPathException
- if the conversion is not possible
compareTo
public int compareTo(java.lang.Object other,
java.util.Comparator collator)
- Compare an untypedAtomic value with another value, using a given collator to perform
any string comparisons. This works by converting the untypedAtomic value to the type
of the other operand, which is the correct behavior for operators like "=" and "!=",
but not for "eq" and "ne": in the latter case, the untypedAtomic value is converted
to a string and this method is therefore not used.
- Returns:
- -1 if the this value is less than the other, 0 if they are equal, +1 if this
value is greater.