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package eu.dnetlib.iis.importer.acm;
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import java.io.InputStream;
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import java.security.InvalidParameterException;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import javax.xml.parsers.SAXParser;
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import javax.xml.parsers.SAXParserFactory;
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import org.apache.avro.file.DataFileWriter;
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import org.apache.hadoop.fs.FileStatus;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import eu.dnetlib.iis.citationmatching.schemas.DocumentMetadata;
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import eu.dnetlib.iis.core.java.HadoopContext;
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import eu.dnetlib.iis.core.java.PortBindings;
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import eu.dnetlib.iis.core.java.Process;
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import eu.dnetlib.iis.core.java.io.DataStore;
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import eu.dnetlib.iis.core.java.io.FileSystemPath;
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import eu.dnetlib.iis.core.java.porttype.AvroPortType;
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import eu.dnetlib.iis.core.java.porttype.PortType;
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import eu.dnetlib.iis.importer.dataset.DataFileRecordReceiver;
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/**
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* Process module importing ACM records from xml dump
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* and writing output to avro datastore.
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* @author mhorst
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*
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*/
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public class AcmXmlImporter implements Process {
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private static final String PORT_OUT_DOCUMENT_METADATA = "document_metadata";
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public static final String PARAM_ACM_XML_DUMP_PATH = "import.acm.xmldump.path";
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private static final Map<String, PortType> outputPorts = new HashMap<String, PortType>();
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{
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outputPorts.put(PORT_OUT_DOCUMENT_METADATA,
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new AvroPortType(DocumentMetadata.SCHEMA$));
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}
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@Override
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public Map<String, PortType> getInputPorts() {
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return Collections.emptyMap();
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}
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@Override
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public Map<String, PortType> getOutputPorts() {
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return outputPorts;
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}
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@Override
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public void run(PortBindings portBindings, HadoopContext context,
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Map<String, String> parameters) throws Exception {
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FileSystem fs = FileSystem.get(context.getConfiguration());
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if (parameters.containsKey(PARAM_ACM_XML_DUMP_PATH)) {
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DataFileWriter<DocumentMetadata> datasetRefWriter = null;
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try {
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datasetRefWriter = DataStore.create(
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new FileSystemPath(fs, portBindings.getOutput().get(PORT_OUT_DOCUMENT_METADATA)),
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DocumentMetadata.SCHEMA$);
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processNode(fs,
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new Path(parameters.get(PARAM_ACM_XML_DUMP_PATH)),
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datasetRefWriter);
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} finally {
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if (datasetRefWriter!=null) {
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datasetRefWriter.close();
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}
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}
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} else {
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throw new InvalidParameterException("required parameter '" +
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PARAM_ACM_XML_DUMP_PATH + "' is missing!");
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}
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}
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protected void processNode(FileSystem fs, Path currentPath,
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DataFileWriter<DocumentMetadata> datasetRefWriter) throws Exception {
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if (fs.isDirectory(currentPath)) {
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for (FileStatus fileStatus : fs.listStatus(currentPath)) {
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processNode(fs, fileStatus.getPath(),
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datasetRefWriter);
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}
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} else {
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InputStream inputStream = null;
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SAXParser saxParser = null;
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try {
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saxParser = SAXParserFactory.newInstance().newSAXParser();
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saxParser.parse(inputStream = fs.open(
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currentPath),
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new AcmDumpXmlHandler(
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new DataFileRecordReceiver<DocumentMetadata>(datasetRefWriter)));
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} finally {
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if (inputStream!=null) {
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inputStream.close();
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}
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}
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}
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}
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}
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