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26658899
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Andreas Müller
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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.io.dwca.in;
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import java.util.ArrayList;
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import java.util.List;
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c3be32ca
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Andreas Müller
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import java.util.Map;
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import java.util.Set;
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26658899
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Andreas Müller
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import org.apache.log4j.Logger;
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import eu.etaxonomy.cdm.io.dwca.TermUri;
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202541e6
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Alexander Oppermann
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import eu.etaxonomy.cdm.io.stream.StreamImportBase;
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import eu.etaxonomy.cdm.io.stream.StreamImportConfiguratorBase;
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import eu.etaxonomy.cdm.io.stream.StreamImportStateBase;
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0add22f5
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Andreas Müller
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.IdentifiableEntity;
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c88bcdaa
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Andreas Müller
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import eu.etaxonomy.cdm.model.reference.Reference;
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26658899
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Andreas Müller
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/**
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* @author a.mueller
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*
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*/
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09b9d4c2
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Andreas Müller
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public class StreamPartitioner<ITEM extends IConverterInput> implements INamespaceReader<IReader<MappedCdmBase>>{
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26658899
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Andreas Müller
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private static final Logger logger = Logger.getLogger(StreamPartitioner.class);
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private int partitionSize;
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c3be32ca
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Andreas Müller
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private LookAheadStream<ITEM> inStream;
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private IPartitionableConverter converter;
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202541e6
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Alexander Oppermann
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private StreamImportStateBase<StreamImportConfiguratorBase, StreamImportBase> state;
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09b9d4c2
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Andreas Müller
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private ConcatenatingReader<MappedCdmBase> outStream;
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26658899
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Andreas Müller
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202541e6
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Alexander Oppermann
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public StreamPartitioner(INamespaceReader<ITEM> input, IPartitionableConverter converter, StreamImportStateBase state, Integer size){
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c3be32ca
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Andreas Müller
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this.inStream = new LookAheadStream<ITEM>(input);
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26658899
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Andreas Müller
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this.converter = converter;
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this.partitionSize = size;
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c3be32ca
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Andreas Müller
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this.state = state;
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09b9d4c2
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Andreas Müller
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initNewOutStream();
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26658899
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Andreas Müller
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}
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09b9d4c2
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Andreas Müller
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private void initNewOutStream(){
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outStream = new ConcatenatingReader<MappedCdmBase>();
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}
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c3be32ca
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Andreas Müller
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.io.dwca.in.IReader#hasNext()
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*/
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26658899
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Andreas Müller
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public boolean hasNext() {
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c3be32ca
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Andreas Müller
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if (this.outStream.hasNext()){
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return true;
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}else{
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return inStream.hasNext(); //TODO what, if converter returns no ouput for inStream.hasNext() ??
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09b9d4c2
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Andreas Müller
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//but be aware that requesting the next object from the next partition crosses the transactional borders
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c3be32ca
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Andreas Müller
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}
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26658899
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Andreas Müller
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}
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c3be32ca
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Andreas Müller
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26658899
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Andreas Müller
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@Override
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09b9d4c2
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Andreas Müller
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public IReader<MappedCdmBase> read() {
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logger.debug("Start partitioner read");
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handleNextPartition();
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IReader<MappedCdmBase> result = this.outStream;
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initNewOutStream();
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logger.debug("End partitioner read");
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return result;
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c3be32ca
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Andreas Müller
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}
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private void handleNextPartition(){
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List<ITEM> lookaheadArray = new ArrayList<ITEM>();
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while (this.inStream.hasNextLookAhead(partitionSize)){
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lookaheadArray.add(this.inStream.readLookAhead());
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26658899
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Andreas Müller
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}
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c3be32ca
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Andreas Müller
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IReader<ITEM> lookaheadStream = new ListReader<ITEM>(lookaheadArray);
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Map<String, Set<String>> foreignKeys = converter.getPartitionForeignKeys(lookaheadStream);
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IImportMapping mapping = state.getMapping();
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60837fa6
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Andreas Müller
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InMemoryMapping partialMapping = mapping.getPartialMapping(foreignKeys);
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c88bcdaa
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Andreas Müller
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Reference<?> sourceRef = state.getCurrentIO().getReferenceService().find(state.getConfig().getSourceRefUuid());
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partialMapping.putMapping(TermUri.CDM_SOURCE_REFERENCE.toString(), state.getConfig().getSourceRefUuid().toString(), sourceRef);
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0add22f5
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Andreas Müller
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c3be32ca
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Andreas Müller
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state.loadRelatedObjects(partialMapping);
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c88bcdaa
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Andreas Müller
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c3be32ca
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Andreas Müller
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while (inStream.isLookingAhead() && inStream.hasNext()){
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IReader<MappedCdmBase> resultReader = converter.map(inStream.read());
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0add22f5
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Andreas Müller
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List<MappedCdmBase> resultList = new ArrayList<MappedCdmBase>(); //maybe better let converter return list from the beginning
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while (resultReader.hasNext()){
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MappedCdmBase item = resultReader.read();
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resultList.add(item);
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addItemToRelatedObjects(item);
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}
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outStream.add(new ListReader<MappedCdmBase>(resultList));
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c3be32ca
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Andreas Müller
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}
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return;
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26658899
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Andreas Müller
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}
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c3be32ca
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Andreas Müller
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| 108 |
26658899
|
Andreas Müller
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0add22f5
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Andreas Müller
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/**
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* Add new items to the local mapping
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* @param item
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*/
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private void addItemToRelatedObjects(MappedCdmBase<IdentifiableEntity> item) {
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CdmBase cdmBase = item.getCdmBase();
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if (cdmBase.getId() == 0){
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if (cdmBase.isInstanceOf(IdentifiableEntity.class)){
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if (converter.requiredSourceNamespaces().contains(item.getNamespace())){
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state.addRelatedObject(item.getNamespace(), item.getSourceId(), item.getCdmBase());
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}
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}
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}
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}
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26658899
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Andreas Müller
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@Override
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public TermUri getTerm() {
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c3be32ca
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Andreas Müller
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return inStream.getTerm();
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26658899
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Andreas Müller
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}
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}
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