com.day.cq.commons.predicate.AbstractNodePredicate Maven / Gradle / Ivy
/*
* Copyright 1997-2008 Day Management AG
* Barfuesserplatz 6, 4001 Basel, Switzerland
* All Rights Reserved.
*
* This software is the confidential and proprietary information of
* Day Management AG, ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Day.
*/
package com.day.cq.commons.predicate;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import org.apache.commons.collections.Predicate;
import org.apache.sling.api.resource.Resource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Predicate used to filter jcr nodes.
*/
abstract public class AbstractNodePredicate implements Predicate {
/**
* default logger
*/
private final Logger log = LoggerFactory.getLogger(AbstractNodePredicate.class);
/**
* {@inheritDoc}
*
* @return true if o is a JCR Node or a Resource that can be
* adapted to a JCR Node and the subsequent call to {@link #evaluate(Node)}
* returns true; false otherwise.
*/
public boolean evaluate(Object o) {
Node n = null;
if (o instanceof Resource) {
n = ((Resource) o).adaptTo(Node.class);
} else if (o instanceof Node) {
n = (Node) o;
}
if (n != null) {
try {
return evaluate(n);
} catch (RepositoryException e) {
log.warn("RepositoryException in evaluate()", e);
}
}
return false;
}
/**
* Evaluates this predicate on the given node.
*
* @param node the node
* @return true if this node satisfies this predicate
* @throws RepositoryException if an error during evaluation occurs
*/
abstract public boolean evaluate(Node node) throws RepositoryException;
}