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26600
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sandro.lab
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/**
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*
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*/
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package eu.dnetlib.data.collective.transformation.engine.functions;
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import java.io.StringReader;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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29206
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jochen.sch
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import java.util.Iterator;
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sandro.lab
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import java.util.List;
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import java.util.Map;
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jochen.sch
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import javax.xml.namespace.NamespaceContext;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathExpressionException;
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import javax.xml.xpath.XPathFactory;
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jochen.sch
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import org.apache.commons.lang.StringEscapeUtils;
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sandro.lab
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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jochen.sch
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import org.xml.sax.InputSource;
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sandro.lab
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import eu.dnetlib.common.profile.Resource;
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import eu.dnetlib.common.profile.ResourceDao;
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import eu.dnetlib.data.collective.transformation.rulelanguage.Argument;
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/**
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* @author jochen
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*
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*/
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public class RetrieveValue extends AbstractTransformationFunction {
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public static final Log log = LogFactory.getLog(RetrieveValue.class);
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public static final String paramFunctionName = "functionName";
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public static final String paramFunctionProfileId = "functionParameterProfileId";
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public static final String paramFunctionExpr = "functionParameterExpr";
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public enum FUNCTION {PROFILEFIELD, CURRENTDATE};
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@javax.annotation.Resource
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private ResourceDao resourceDao;
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/* (non-Javadoc)
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* @see eu.dnetlib.data.collective.transformation.engine.functions.AbstractTransformationFunction#execute()
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*/
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@Override
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String execute() throws ProcessingException {
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// TODO Auto-generated method stub
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return null;
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}
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jochen.sch
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public String executeSingleValue(String functionName, List<Argument> arguments, String objRecord, Map<String, String> namespaceMap) throws ProcessingException{
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sandro.lab
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String result = "";
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FUNCTION function = FUNCTION.valueOf(functionName);
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switch(function){
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case PROFILEFIELD:
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if (arguments.size() != 2){
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throw new ProcessingException("invalid number of arguments - required 2 but found :" + arguments.size());
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}
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String arg = "";
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Resource resource = null;
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try{
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if (arguments.get(0).isValue()){
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arg = arguments.get(0).getArgument();
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claudio.at
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log.debug("retrieve value arg isValue: " + arg);
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jochen.sch
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if (arg.startsWith("collection(")) { // xquery
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arg = StringEscapeUtils.unescapeXml(arg);
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resource = resourceDao.getResourceByQuery(arg); // query
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}else
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resource = resourceDao.getResource(arg); // profile id
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}else if (arguments.get(0).isInputField()){
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arg = evaluateXpath(objRecord, arguments.get(0).getArgument(), namespaceMap);
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log.debug("retrieve value arg isInputField: " + arg);
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if (arg.startsWith("collection(")) { // xquery
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arg = StringEscapeUtils.unescapeXml(arg);
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resource = resourceDao.getResourceByQuery(arg); // query
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}else
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resource = resourceDao.getResource(arg); // profile id
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}else if (arguments.get(0).isJobConst()){
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// TODO
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}else if (arguments.get(0).isVariable()){
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// TODO
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log.warn("RETRIEVEVALUE: support for variables not yet implemented.");
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}
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}catch(Exception e){
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claudio.at
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throw new ProcessingException(e);
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sandro.lab
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}
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if (resource == null){
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throw new ProcessingException("invalid profileId: " + arg + "; functionName: " + functionName + ", arg1: " + arguments.get(0).getArgument() + ", arg2: " + arguments.get(1).getArgument());
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}
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result = resource.getValue(arguments.get(1).getArgument()); // xpath expr
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break;
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case CURRENTDATE:
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SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'"); // TODO format string
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result = dateFormat.format(new Date());
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default:
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// unsupported
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break;
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}
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return result;
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}
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/**
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* @return the resourceDao
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*/
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public ResourceDao getResourceDao() {
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return resourceDao;
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}
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/**
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* @param resourceDao the resourceDao to set
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*/
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public void setResourceDao(ResourceDao resourceDao) {
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this.resourceDao = resourceDao;
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}
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jochen.sch
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private String evaluateXpath(String record, String xpathExpr, Map<String, String> nsMap){
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XPath xpath = XPathFactory.newInstance().newXPath();
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xpath.setNamespaceContext(new NamespaceContext() {
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@Override
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public Iterator getPrefixes(String namespaceURI) {
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return null;
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}
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@Override
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public String getPrefix(String namespaceURI) {
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// TODO Auto-generated method stub
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return null;
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}
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@Override
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public String getNamespaceURI(String prefix) {
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if ("dri".equals(prefix)){
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return "http://www.driver-repository.eu/namespace/dri";
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}else if ("dr".equals(prefix)){
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return "http://www.driver-repository.eu/namespace/dr";
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}else if ("dc".equals(prefix)){
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return "http://purl.org/dc/elements/1.1/";
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}else if ("oaf".equals(prefix)){
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return "http://namespace.openaire.eu/oaf";
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}else if ("prov".equals(prefix)){
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return "http://www.openarchives.org/OAI/2.0/provenance";
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}
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return "";
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}
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});
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try {
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return xpath.evaluate(xpathExpr, new InputSource(new StringReader(record)));
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} catch (XPathExpressionException e) {
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log.fatal("cannot evaluate xpath");
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throw new IllegalStateException(e);
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}
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26600
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sandro.lab
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}
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}
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