org.apache.jackrabbit.commons.predicate
Class RowPredicate

java.lang.Object
  org.apache.jackrabbit.commons.predicate.RowPredicate

All Implemented Interfaces:

Predicate

public class RowPredicate
extends Object
implements Predicate

Predicate for checking whether a given object is a Row and optionally whether it contains a given selector. Subclasses can extend this class to provide more complex checking of the row or the selected node.

Since:

Apache Jackrabbit 2.2

Field Summary

Fields inherited from interface org.apache.jackrabbit.commons.predicate.Predicate

FALSE, TRUE

Constructor Summary

RowPredicate()
Creates a row predicate.

RowPredicate(String selectorName)
Creates a row predicate that checks the existence of the given selector (if given).

Method Summary

protected boolean	evaluate(Node node) Evaluates the given node.
boolean	evaluate(Object object) Checks whether the given object is a Row and calls the protected evaluate(Row) method to evaluate the row.
protected boolean	evaluate(Row row) Evaluates the given row.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RowPredicate

public RowPredicate(String selectorName)

Creates a row predicate that checks the existence of the given selector (if given).

Parameters:

selectorName - selector name, or null

RowPredicate

public RowPredicate()

Creates a row predicate.

Method Detail

evaluate

public boolean evaluate(Object object)

Checks whether the given object is a Row and calls the protected evaluate(Row) method to evaluate the row.

Specified by:

evaluate in interface Predicate

Parameters:

object - some object

Returns:

predicate result

evaluate

protected boolean evaluate(Row row)
                    throws RepositoryException

Evaluates the given row. If a selector name is specified, then the corresponding node in this row is evaluated by calling the protected evaluate(Node) method.

Throws:

RepositoryException

evaluate

protected boolean evaluate(Node node)
                    throws RepositoryException

Evaluates the given node. The default implementation always returns true.

Throws:

RepositoryException