Package org.apache.xpath
Class Arg
- java.lang.Object
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- org.apache.xpath.Arg
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public class Arg extends java.lang.Object
This class holds an instance of an argument on the stack. The value of the argument can be either an XObject or a String containing an expression.
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Constructor Summary
Constructors Constructor Description Arg()
Construct a dummy parameter argument, with no QName and no value (either expression string or value XObject). isVisible defaults to true.Arg(QName qname, java.lang.String expression, boolean isFromWithParam)
Construct a parameter argument that contains an expression.Arg(QName qname, XObject val)
Construct a parameter argument which has an XObject value.Arg(QName qname, XObject val, boolean isFromWithParam)
Construct a parameter argument.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
detach()
Have the object release it's resources.boolean
equals(java.lang.Object obj)
Equality function specialized for the variable name.java.lang.String
getExpression()
Get the value expression for this argument.QName
getQName()
Get the qualified name for this argument.XObject
getVal()
Get the value for this argument.boolean
isFromWithParam()
Tell if this variable is a parameter passed with a with-param or as a top-level parameter.boolean
isVisible()
Tell if this variable is currently visible.void
setExpression(java.lang.String expr)
Set the value expression for this argument.void
setIsVisible(boolean b)
Update visibility status of this variable.void
setQName(QName name)
Set the qualified name for this argument.void
setVal(XObject val)
Set the value of this argument.
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Constructor Detail
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Arg
public Arg()
Construct a dummy parameter argument, with no QName and no value (either expression string or value XObject). isVisible defaults to true.
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Arg
public Arg(QName qname, java.lang.String expression, boolean isFromWithParam)
Construct a parameter argument that contains an expression.- Parameters:
qname
- Name of the argument, expressed as a QName object.expression
- String to be stored as this argument's value expression.isFromWithParam
- True if this is a parameter variable.
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Arg
public Arg(QName qname, XObject val)
Construct a parameter argument which has an XObject value. isVisible defaults to true.- Parameters:
qname
- Name of the argument, expressed as a QName object.val
- Value of the argument, expressed as an XObject
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Method Detail
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getQName
public final QName getQName()
Get the qualified name for this argument.- Returns:
- QName object containing the qualified name
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setQName
public final void setQName(QName name)
Set the qualified name for this argument.- Parameters:
name
- QName object representing the new Qualified Name.
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getVal
public final XObject getVal()
Get the value for this argument.- Returns:
- the argument's stored XObject value.
- See Also:
setVal(XObject)
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setVal
public final void setVal(XObject val)
Set the value of this argument.- Parameters:
val
- an XObject representing the arguments's value.- See Also:
getVal()
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detach
public void detach()
Have the object release it's resources. Call only when the variable or argument is going out of scope.
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getExpression
public java.lang.String getExpression()
Get the value expression for this argument.- Returns:
- String containing the expression previously stored into this argument
- See Also:
setExpression(java.lang.String)
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setExpression
public void setExpression(java.lang.String expr)
Set the value expression for this argument.- Parameters:
expr
- String containing the expression to be stored as this argument's value.- See Also:
getExpression()
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isFromWithParam
public boolean isFromWithParam()
Tell if this variable is a parameter passed with a with-param or as a top-level parameter.
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isVisible
public boolean isVisible()
Tell if this variable is currently visible.
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setIsVisible
public void setIsVisible(boolean b)
Update visibility status of this variable.
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equals
public boolean equals(java.lang.Object obj)
Equality function specialized for the variable name. If the argument is not a qname, it will deligate to the super class.- Overrides:
equals
in classjava.lang.Object
- Parameters:
obj
- the reference object with which to compare.- Returns:
true
if this object is the same as the obj argument;false
otherwise.
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