org.sirix.axis.concurrent.Util Maven / Gradle / Ivy
package org.sirix.axis.concurrent;
import org.sirix.api.Axis;
import org.sirix.exception.SirixXPathException;
import org.sirix.service.xml.xpath.EXPathError;
import org.sirix.settings.Fixed;
import org.sirix.utils.LogWrapper;
import org.slf4j.LoggerFactory;
/** Utilities. */
public final class Util {
/** Logger. */
private static final LogWrapper LOGGER = new LogWrapper(LoggerFactory.getLogger(Util.class));
/**
* Get next key.
*
* @param axis the {@link Axis}
* @return the next result of the axis. If the axis has no next result, the null node key is
* returned.
*/
public static long getNext(final Axis axis) {
return (axis.hasNext()) ? axis.next() : Fixed.NULL_NODE_KEY.getStandardProperty();
}
/**
* Checks, whether the given node key belongs to a node or an atomic value. Returns true for a
* node and throws an exception for an atomic value, because these are not allowed in the except
* expression.
*
* @param nodeKey the node key to validate
* @return {@code true}, if key is a key of a node, otherwise throws an exception
* @throws SirixXPathException if the key is no node key
*/
public static boolean isValid(final long nodeKey) {
if (nodeKey < 0) {
try {
throw EXPathError.XPTY0004.getEncapsulatedException();
} catch (final SirixXPathException e) {
LOGGER.error(e.getMessage(), e);
}
}
return true;
}
}