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import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
public class XMLManager
{
/* ... */
/* private static final DocumentBuilderFactoryCreatorMakerInstanciator; */
/* private static final DocumentBuilderFactoryCreatorMaker; */
/* private static final DocumentBuilderFactoryCreator; */
private static final DocumentBuilderFactory DOC_BUILDER_FACTORY;
private static final DocumentBuilder DOC_BUILDER;
private static final XPathFactory XPATH_FACTORY;
private static final XPath XPATH;
static
{
DocumentBuilder i_dont_even;
DOC_BUILDER_FACTORY = DocumentBuilderFactory.newInstance();
try
{
i_dont_even = DOC_BUILDER_FACTORY.newDocumentBuilder();
}
catch (final Exception e)
{
i_dont_even = null;
System.err.println
(
"[E] Err... You somehow managed to trigger an exception from purely"
+ " static members:"
);
e.printStackTrace();
System.exit(-1);
}
DOC_BUILDER = i_dont_even;
XPATH_FACTORY = XPathFactory.newInstance();
XPATH = XPATH_FACTORY.newXPath();
}
private XMLManager () {} /* Utility Class. */
public static Document get_document (final String filename)
throws
SAXException,
IOException
{
final File file;
file = new File(filename);
return DOC_BUILDER.parse(file);
}
public static XPathExpression compile (final String expression)
throws XPathExpressionException
{
return XPATH.compile(expression);
}
public static XPathExpression compile_or_die (final String expression)
{
try
{
return XPATH.compile(expression);
}
catch (final XPathExpressionException xpee)
{
System.err.println("[P] Invalid XPathExpression (report as bug):");
xpee.printStackTrace();
System.exit(-1);
}
return null; /* Because Java. */
}
public static Collection<Node> node_list_to_node_collection
(
final NodeList nl
)
{
final Collection<Node> result;
final int nl_length;
result = new ArrayList<Node>();
nl_length = nl.getLength();
for (int i = 0; i < nl_length; ++i)
{
result.add(nl.item(i));
}
return result;
}
public static String get_attribute (final Node n, final String attr)
{
return n.getAttributes().getNamedItem(attr).getNodeValue();
}
}
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