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add try-catch-block for XMLConstants.ACCESS_EXTERNAL_DTD #128

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Original file line number Diff line number Diff line change
Expand Up @@ -19,12 +19,17 @@
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
* @author Greg Turnquist
* @since 3.0.5
*/
public class TransformerFactoryUtils {

private static final Log log = LogFactory.getLog(TransformerFactoryUtils.class);

/**
* Build a new {@link TransformerFactory} using the default constructor.
*/
Expand All @@ -50,7 +55,13 @@ public static TransformerFactory newInstance(Class<? extends TransformerFactory>
* Prevent external entities from accessing.
*/
private static TransformerFactory defaultSettings(TransformerFactory factory) {
factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
try {
factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
} catch (IllegalArgumentException e) {
if (log.isWarnEnabled()) {
log.warn(XMLConstants.ACCESS_EXTERNAL_DTD + " property not supported by " + factory.getClass().getCanonicalName());
}
}
factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, "");
return factory;
}
Expand Down