Package org.apache.xpath.objects
Class XNumber
java.lang.Object
org.apache.xpath.Expression
org.apache.xpath.objects.XObject
org.apache.xpath.objects.XNumber
- All Implemented Interfaces:
Serializable
,Cloneable
,SourceLocator
,ExpressionNode
,XPathVisitable
This class represents an XPath number, and is capable of
converting the number to other types, such as a string.
- See Also:
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Field Summary
Fields inherited from class org.apache.xpath.objects.XObject
CLASS_BOOLEAN, CLASS_NODESET, CLASS_NULL, CLASS_NUMBER, CLASS_RTREEFRAG, CLASS_STRING, CLASS_UNKNOWN, CLASS_UNRESOLVEDVARIABLE
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
bool()
Cast result object to a boolean.void
callVisitors
(ExpressionOwner owner, XPathVisitor visitor) This will traverse the heararchy, calling the visitor for each member.boolean
Tell if two objects are functionally equal.int
getType()
Tell that this is a CLASS_NUMBER.Given a request type, return the equivalent string.boolean
Tell if this expression returns a stable number that will not change during iterations within the expression.double
num()
Cast result object to a number.double
num
(XPathContext xctxt) Evaluate expression to a number.object()
Return a java object that's closest to the representation that should be handed to an extension.str()
Cast result object to a string.Methods inherited from class org.apache.xpath.objects.XObject
allowDetachToRelease, appendToFsb, boolWithSideEffects, castToType, create, create, deepEquals, destruct, detach, dispatchCharactersEvents, execute, fixupVariables, getFresh, greaterThan, greaterThanOrEqual, iter, lessThan, lessThanOrEqual, mutableNodeset, nodelist, nodeset, notEquals, numWithSideEffects, reset, rtf, rtf, rtree, rtree, toString, xstr
Methods inherited from class org.apache.xpath.Expression
asIterator, asIteratorRaw, asNode, assertion, bool, canTraverseOutsideSubtree, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, warn, xstr
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Constructor Details
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XNumber
public XNumber(double d) Construct a XNodeSet object.- Parameters:
d
- Value of the object
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XNumber
Construct a XNodeSet object.- Parameters:
num
- Value of the object
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Method Details
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getType
public int getType()Tell that this is a CLASS_NUMBER. -
getTypeString
Given a request type, return the equivalent string. For diagnostic purposes.- Overrides:
getTypeString
in classXObject
- Returns:
- type string "#NUMBER"
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num
public double num()Cast result object to a number. -
num
Evaluate expression to a number.- Overrides:
num
in classExpression
- Parameters:
xctxt
- The XPath runtime context.- Returns:
- 0.0
- Throws:
TransformerException
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bool
public boolean bool()Cast result object to a boolean. -
str
Cast result object to a string. -
object
Return a java object that's closest to the representation that should be handed to an extension. -
equals
Tell if two objects are functionally equal.- Overrides:
equals
in classXObject
- Parameters:
obj2
- Object to compare this to- Returns:
- true if the two objects are equal
- Throws:
TransformerException
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isStableNumber
public boolean isStableNumber()Tell if this expression returns a stable number that will not change during iterations within the expression. This is used to determine if a proximity position predicate can indicate that no more searching has to occur.- Overrides:
isStableNumber
in classExpression
- Returns:
- true if the expression represents a stable number.
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callVisitors
Description copied from interface:XPathVisitable
This will traverse the heararchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.- Specified by:
callVisitors
in interfaceXPathVisitable
- Overrides:
callVisitors
in classXObject
- Parameters:
owner
- The owner of the visitor, where that path may be rewritten if needed.visitor
- The visitor whose appropriate method will be called.- See Also:
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