Package org.htmlunit.xpath.objects
Class XNumber
- java.lang.Object
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- org.htmlunit.xpath.Expression
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- org.htmlunit.xpath.objects.XObject
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- org.htmlunit.xpath.objects.XNumber
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- All Implemented Interfaces:
javax.xml.transform.SourceLocator,ExpressionNode,XPathVisitable
public class XNumber extends XObject
This class represents an XPath number, and is capable of converting the number to other types, such as a string.
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Field Summary
Fields Modifier and Type Field Description (package private) doublem_valValue of the XNumber object.-
Fields inherited from class org.htmlunit.xpath.objects.XObject
CLASS_BOOLEAN, CLASS_NODESET, CLASS_NULL, CLASS_NUMBER, CLASS_RTREEFRAG, CLASS_STRING, CLASS_UNKNOWN, m_obj
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Constructor Summary
Constructors Constructor Description XNumber(double d)Construct a XNodeSet object.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description booleanbool()Cast result object to a boolean.voidcallVisitors(XPathVisitor visitor)This will traverse the hierarchy, calling the visitor for each member.booleanequals(XObject obj2)Tell if two objects are functionally equal.intgetType()Tell what kind of class this is.java.lang.StringgetTypeString()Given a request type, return the equivalent string.booleanisStableNumber()Tell if this expression returns a stable number that will not change during iterations within the expression.doublenum()Cast result object to a number.doublenum(XPathContext xctxt)Evaluate expression to a number.java.lang.Objectobject()Return a java object that's closest to the representation that should be handed to an extension.java.lang.Stringstr()Cast result object to a string.private static java.lang.Stringzeros(int n)Return a string of '0' of the given length-
Methods inherited from class org.htmlunit.xpath.objects.XObject
boolWithSideEffects, deepEquals, detach, error, error, execute, greaterThan, greaterThanOrEqual, iter, lessThan, lessThanOrEqual, mutableNodeset, nodelist, nodeset, notEquals, numWithSideEffects, setObject, toString, xstr
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Methods inherited from class org.htmlunit.xpath.Expression
asIterator, asNode, assertion, bool, canTraverseOutsideSubtree, error, execute, execute, execute, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isSameClass
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Method Detail
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getType
public int getType()
Tell what kind of class this is.
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getTypeString
public java.lang.String getTypeString()
Given a request type, return the equivalent string. For diagnostic purposes.- Overrides:
getTypeStringin classXObject- Returns:
- type string "#UNKNOWN" + object class name
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num
public double num()
Cast result object to a number. Always issues an error.
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num
public double num(XPathContext xctxt) throws javax.xml.transform.TransformerException
Evaluate expression to a number.- Overrides:
numin classExpression- Parameters:
xctxt- The XPath runtime context.- Returns:
- The expression evaluated as a double.
- Throws:
javax.xml.transform.TransformerException- if any
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bool
public boolean bool()
Cast result object to a boolean. Always issues an error.
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str
public java.lang.String str()
Cast result object to a string.
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zeros
private static java.lang.String zeros(int n)
Return a string of '0' of the given length- Parameters:
n- Length of the string to be returned- Returns:
- a string of '0' with the given length
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object
public java.lang.Object object()
Return a java object that's closest to the representation that should be handed to an extension.
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equals
public boolean equals(XObject obj2)
Tell if two objects are functionally equal.
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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:
isStableNumberin classExpression- Returns:
- true if the expression represents a stable number.
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callVisitors
public void callVisitors(XPathVisitor visitor)
This will traverse the hierarchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.- Specified by:
callVisitorsin interfaceXPathVisitable- Overrides:
callVisitorsin classXObject- Parameters:
visitor- The visitor whose appropriate method will be called.
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