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package eu.dnetlib.functionality.index.utils;
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import java.io.StringReader;
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import java.util.List;
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import java.util.Map;
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import org.dom4j.Document;
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import org.dom4j.DocumentException;
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import org.dom4j.io.SAXReader;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.xml.sax.InputSource;
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import com.google.common.collect.HashBasedTable;
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import com.google.common.collect.Table;
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import com.mycila.xmltool.CallBack;
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import com.mycila.xmltool.XMLDoc;
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import com.mycila.xmltool.XMLTag;
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import eu.dnetlib.data.provision.index.rmi.IndexServiceException;
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import eu.dnetlib.functionality.index.client.IndexClientException;
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public class MDFormatReader {
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static class XmlUtils {
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/**
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* helper method, parses a list of fields.
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*
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* @param fields
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* the given fields
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* @return the parsed fields
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* @throws IndexServiceException
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* if cannot parse the fields
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*/
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public static Document parse(final String xml) {
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try {
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return new SAXReader().read(new StringReader(xml));
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} catch (DocumentException e) {
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throw new IllegalArgumentException("cannot parse: " + xml);
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}
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}
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public static InputSource asInputSource(final String input) throws DocumentException {
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return new InputSource(new StringReader(parse(input).asXML()));
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}
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}
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@Autowired
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private ServiceTools serviceTools;
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@Autowired
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private MetadataReferenceFactory mdFactory;
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public List<MetadataReference> listMDRefs() throws IndexClientException {
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return serviceTools.listMDRefs();
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}
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public Document getFields(final MetadataReference mdRef) {
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String fields = serviceTools.getIndexFields(mdRef);
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return (fields != null) && !fields.isEmpty() ? XmlUtils.parse(fields) : null;
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}
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public Map<String, String> getAttributeMap(final MetadataReference mdRef, final String attribute) throws IndexClientException {
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return getAttributeTable(mdRef, attribute).column(attribute);
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}
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public Table<String, String, String> getAttributeTable(final MetadataReference mdRef, final String... attributeList) throws IndexClientException {
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final String fields = serviceTools.getIndexFields(mdRef);
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if (fields.isEmpty()) throw new IndexClientException("No result getting index layout informations");
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final Table<String, String, String> t = HashBasedTable.create();
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XMLDoc.from(serviceTools.getIndexFields(mdRef), false).forEach("//FIELD", new CallBack() {
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@Override
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public void execute(final XMLTag field) {
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for (String attribute : attributeList) {
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String value = null;
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if ("xpath".equals(attribute)) {
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if (!(field.hasAttribute("xpath") || field.hasAttribute("value"))) return;
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value = field.hasAttribute("xpath") ? field.getAttribute("xpath") : field.getAttribute("value");
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}
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if ("weight".equals(attribute)) {
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if (!(field.hasAttribute(attribute))) return;
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value = field.hasAttribute(attribute) ? field.getAttribute(attribute) : "";
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}
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if (value == null) {
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value = field.getAttribute(attribute);
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}
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t.put(field.getAttribute("name").toLowerCase(), attribute, value);
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}
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}
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});
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return t;
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}
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}
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