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package eu.dnetlib.index.utils;
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import java.io.IOException;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerConfigurationException;
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import javax.xml.transform.TransformerException;
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.TransformerFactoryConfigurationError;
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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.Document;
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import org.dom4j.DocumentException;
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import org.dom4j.io.DocumentResult;
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import org.dom4j.io.DocumentSource;
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import org.dom4j.io.SAXReader;
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import org.springframework.beans.factory.annotation.Required;
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import org.springframework.core.io.Resource;
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import eu.dnetlib.rmi.provision.IndexServiceException;
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public class IndexSchemaFactory {
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private static final Log log = LogFactory.getLog(IndexSchemaFactory.class); // NOPMD by marko on 11/24/08 5:02 PM
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private final static String TEXT_FIELD_TYPE = "textFieldType";
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private Resource schemaTemplate;
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private String textFieldType;
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/**
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* Transformer used to get the index schema.
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*/
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private Transformer transformer;
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public void init() throws TransformerConfigurationException, TransformerFactoryConfigurationError, DocumentException, IOException {
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transformer = TransformerFactory.newInstance().newTransformer(new DocumentSource(new SAXReader().read(getSchemaTemplate().getInputStream())));
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transformer.setParameter(TEXT_FIELD_TYPE, getTextFieldType());
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}
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/**
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* @param fields
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* input document
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* @return the application of the schemaXslt transformation to the docIn document
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* @throws IndexServiceException
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*/
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public String getSchema(final Document fields) throws IndexServiceException {
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log.debug("default field type: " + getTextFieldType());
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log.debug("building schema from fields: \n" + fields.asXML() + "\n");
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final DocumentResult result = new DocumentResult();
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try {
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transformer.transform(new DocumentSource(fields), result);
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String xml = result.getDocument().asXML();
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log.debug("new index schema:\n" + xml);
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return xml;
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} catch (TransformerException e) {
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throw new IndexServiceException(e);
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}
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}
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@Required
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public void setSchemaTemplate(final Resource schemaTemplate) {
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this.schemaTemplate = schemaTemplate;
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}
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public Resource getSchemaTemplate() {
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return schemaTemplate;
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}
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@Required
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public void setTextFieldType(final String textFieldType) {
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this.textFieldType = textFieldType;
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}
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public String getTextFieldType() {
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return textFieldType;
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}
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}
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