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package eu.dnetlib.data.transform;
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import java.io.StringReader;
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import java.util.Map;
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import java.util.Map.Entry;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerFactory;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.dom4j.io.DocumentSource;
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import org.dom4j.io.SAXReader;
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public class XsltRowTransformerFactory {
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private static final Log log = LogFactory.getLog(XsltRowTransformerFactory.class); // NOPMD by marko on 11/24/08 5:02 PM
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public XsltRowTransformer getTransformer(final String xslt) {
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return doGetTransformer(xslt, null);
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}
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public XsltRowTransformer getTransformer(final String xslt, final Map<String, Object> params) {
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return doGetTransformer(xslt, params);
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}
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private XsltRowTransformer doGetTransformer(final String xslt, final Map<String, Object> params) {
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try {
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if ((xslt == null) || xslt.isEmpty()) return new XsltRowTransformer(null);
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final TransformerFactory factory = TransformerFactory.newInstance();
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if (log.isDebugEnabled()) {
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log.debug("using transformer factory: '" + factory.getClass().getCanonicalName() + "'");
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}
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final Transformer t = factory.newTransformer(new DocumentSource(new SAXReader().read(new StringReader(xslt))));
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if (params != null && !params.isEmpty()) {
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for (final Entry<String, Object> e : params.entrySet()) {
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log.debug(String.format("using xslt param: %s - %s", e.getKey(), e.getValue()));
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t.setParameter(e.getKey(), e.getValue());
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}
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}
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return new XsltRowTransformer(t);
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} catch (final Exception e) {
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throw new RuntimeException("Error generating transformer from xslt:\n" + xslt, e);
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}
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}
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public static XsltRowTransformer newInstance(final String xslt) {
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return new XsltRowTransformerFactory().getTransformer(xslt);
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}
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public static XsltRowTransformer newInstance(final String xslt, final Map<String, Object> params) {
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return new XsltRowTransformerFactory().getTransformer(xslt, params);
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}
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}
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