58 lines
1.8 KiB
Java
58 lines
1.8 KiB
Java
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package eu.dnetlib.dhp.collection.plugin.base;
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import java.io.InputStream;
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import java.util.Iterator;
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import java.util.Optional;
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import java.util.Spliterator;
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import java.util.Spliterators;
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import java.util.stream.Stream;
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import java.util.stream.StreamSupport;
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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 org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import eu.dnetlib.dhp.collection.ApiDescriptor;
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import eu.dnetlib.dhp.collection.plugin.CollectorPlugin;
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import eu.dnetlib.dhp.collection.plugin.file.AbstractSplittedRecordPlugin;
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import eu.dnetlib.dhp.common.aggregation.AggregatorReport;
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import eu.dnetlib.dhp.common.collection.CollectorException;
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public class BaseCollectorPlugin implements CollectorPlugin {
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private final FileSystem fs;
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private static final Logger log = LoggerFactory.getLogger(AbstractSplittedRecordPlugin.class);
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public BaseCollectorPlugin(final FileSystem fs) {
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this.fs = fs;
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}
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@Override
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public Stream<String> collect(final ApiDescriptor api, final AggregatorReport report) throws CollectorException {
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// get path to file
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final Path filePath = Optional
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.ofNullable(api.getBaseUrl())
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.map(Path::new)
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.orElseThrow(() -> new CollectorException("missing baseUrl"));
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log.info("baseUrl: {}", filePath);
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try {
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if (!this.fs.exists(filePath)) { throw new CollectorException("path does not exist: " + filePath); }
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} catch (final Throwable e) {
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throw new CollectorException(e);
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}
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try (InputStream is = this.fs.open(filePath)) {
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final Iterator<String> iterator = new BaseCollectorIterator(is, new AggregatorReport());
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final Spliterator<String> spliterator = Spliterators.spliteratorUnknownSize(iterator, Spliterator.ORDERED);
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return StreamSupport.stream(spliterator, false);
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} catch (final Throwable e) {
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throw new CollectorException(e);
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}
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}
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}
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