Package org.jaxen.expr
Class DefaultFilterExpr
- java.lang.Object
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- org.jaxen.expr.DefaultFilterExpr
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- All Implemented Interfaces:
java.io.Serializable
,Expr
,FilterExpr
,Predicated
public class DefaultFilterExpr extends java.lang.Object implements FilterExpr, Predicated
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description DefaultFilterExpr(Expr expr, PredicateSet predicateSet)
DefaultFilterExpr(PredicateSet predicateSet)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addPredicate(Predicate predicate)
Add an additional predicate to this object.boolean
asBoolean(Context context)
Returns true if the current filter matches at least one of the context nodesstatic java.util.Iterator
convertToIterator(java.lang.Object obj)
static java.util.List
convertToList(java.lang.Object obj)
java.lang.Object
evaluate(Context context)
Evaluate the expression in the given context, and return the result.Expr
getExpr()
java.util.List
getPredicates()
Returns a possibly empty list of predicates.PredicateSet
getPredicateSet()
Returns a possibly empty set of predicates.java.lang.String
getText()
Returns a String containing the XPath expression.Expr
simplify()
Simplifies the XPath expression.java.lang.String
toString()
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Constructor Detail
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DefaultFilterExpr
public DefaultFilterExpr(PredicateSet predicateSet)
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DefaultFilterExpr
public DefaultFilterExpr(Expr expr, PredicateSet predicateSet)
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Method Detail
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addPredicate
public void addPredicate(Predicate predicate)
Description copied from interface:Predicated
Add an additional predicate to this object.- Specified by:
addPredicate
in interfacePredicated
- Parameters:
predicate
- the predicate to add
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getPredicates
public java.util.List getPredicates()
Description copied from interface:Predicated
Returns a possibly empty list of predicates.- Specified by:
getPredicates
in interfacePredicated
- Returns:
- the list of predicates
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getPredicateSet
public PredicateSet getPredicateSet()
Description copied from interface:Predicated
Returns a possibly empty set of predicates.- Specified by:
getPredicateSet
in interfacePredicated
- Returns:
- the set of predicates
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getExpr
public Expr getExpr()
- Specified by:
getExpr
in interfaceFilterExpr
- Returns:
- the underlying filter expression
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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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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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.
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asBoolean
public boolean asBoolean(Context context) throws JaxenException
Returns true if the current filter matches at least one of the context nodes- Specified by:
asBoolean
in interfaceFilterExpr
- Returns:
- true if a node matches; false if no node matches
- Throws:
JaxenException
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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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convertToIterator
public static java.util.Iterator convertToIterator(java.lang.Object obj)
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convertToList
public static java.util.List convertToList(java.lang.Object obj)
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