public class PredicateSet extends Object implements Serializable
Represents the collection of predicates that follow the node-test in a location path.
There is no rule that the same predicate may not appear twice in an XPath expression, nor does this class enforce any such rule. This is implemented more as a list than a set. However, adding the same predicate twice should have no effect on the final result other than slowing it down.
Constructor and Description |
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PredicateSet()
Create a new empty predicate set.
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Modifier and Type | Method and Description |
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void |
addPredicate(Predicate predicate)
Add a predicate to the set.
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List |
applyPredicate(Predicate predicate,
List nodes2Filter,
ContextSupport support) |
protected boolean |
evaluateAsBoolean(List contextNodeSet,
ContextSupport support)
Returns true if any of the supplied nodes satisfy
all the predicates in the set.
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protected List |
evaluatePredicates(List contextNodeSet,
ContextSupport support)
Returns all of the supplied nodes that satisfy
all the predicates in the set.
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List |
getPredicates()
Returns the list containing the predicates.
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String |
getText()
Returns the XPath string containing each of the predicates.
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void |
simplify()
Simplify each of the predicates in the list.
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public void addPredicate(Predicate predicate)
predicate
- the predicate to be insertedpublic List getPredicates()
public void simplify()
public String getText()
protected boolean evaluateAsBoolean(List contextNodeSet, ContextSupport support) throws JaxenException
Returns true if any of the supplied nodes satisfy all the predicates in the set. Returns false if none of the supplied nodes matches all the predicates in the set. Returns false if the node-set is empty.
contextNodeSet
- the nodes to test against these predicatessupport
- ????JaxenException
protected List evaluatePredicates(List contextNodeSet, ContextSupport support) throws JaxenException
Returns all of the supplied nodes that satisfy all the predicates in the set.
contextNodeSet
- the nodes to test against these predicatessupport
- ????JaxenException
public List applyPredicate(Predicate predicate, List nodes2Filter, ContextSupport support) throws JaxenException
JaxenException
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