Package org.jaxen.expr
Class DefaultLocationPath
- java.lang.Object
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- org.jaxen.expr.DefaultExpr
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- org.jaxen.expr.DefaultLocationPath
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- All Implemented Interfaces:
java.io.Serializable
,Expr
,LocationPath
- Direct Known Subclasses:
DefaultAbsoluteLocationPath
,DefaultRelativeLocationPath
abstract class DefaultLocationPath extends DefaultExpr implements LocationPath
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Field Summary
Fields Modifier and Type Field Description private java.util.List
steps
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Constructor Summary
Constructors Constructor Description DefaultLocationPath()
Create a new empty location path.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addStep(Step step)
Add the next step to this location path.java.lang.Object
evaluate(Context context)
Evaluate the expression in the given context, and return the result.java.util.List
getSteps()
Returns the ordered list of steps in this location path.java.lang.String
getText()
Returns a String containing the XPath expression.boolean
isAbsolute()
Returns true if this is an absolute location path; false if it isn't.private boolean
isReverseAxis(Step step)
Expr
simplify()
Simplifies the XPath expression.java.lang.String
toString()
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Methods inherited from class org.jaxen.expr.DefaultExpr
convertToIterator, convertToList
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Method Detail
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addStep
public void addStep(Step step)
Description copied from interface:LocationPath
Add the next step to this location path.- Specified by:
addStep
in interfaceLocationPath
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getSteps
public java.util.List getSteps()
Description copied from interface:LocationPath
Returns the ordered list of steps in this location path. This list may be live.- Specified by:
getSteps
in interfaceLocationPath
- Returns:
- the ordered list of steps in this location path
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simplify
public Expr simplify()
Description copied from interface:Expr
Simplifies the XPath expression. For example, the expression//para[1 = 1]
could be simplified to//para
. In practice, this is usually a noop. Jaxen does not currently perform any simplification.- Specified by:
simplify
in interfaceExpr
- Overrides:
simplify
in classDefaultExpr
- Returns:
- the simplified expression
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getText
public java.lang.String getText()
Description copied from interface:Expr
Returns a String containing the XPath expression.
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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isAbsolute
public boolean isAbsolute()
Description copied from interface:LocationPath
Returns true if this is an absolute location path; false if it isn't. Absolute location paths all begiune with/
or//
.- Specified by:
isAbsolute
in interfaceLocationPath
- Returns:
- true if this is an absol;ute location path; false if it isn't
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evaluate
public java.lang.Object evaluate(Context context) throws JaxenException
Description copied from interface:Expr
Evaluate the expression in the given context, and return the result. The result will be ajava.lang.Double
for expressions that return a number, ajava.lang.String
for expressions that return a string, ajava.lang.Boolean
for expressions that return a boolean, and ajava.util.List
for expressions that return a node-set. In the latter case, the elements of the list are the actual objects from the source document model. Copies are not made.- Specified by:
evaluate
in interfaceExpr
- Parameters:
context
- the context in which the expression is evaluated- Returns:
- an object representing the result of the evaluation
- Throws:
JaxenException
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isReverseAxis
private boolean isReverseAxis(Step step)
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