Examples of org.apache.jena.atlas.lib.ColumnMap

org.apache.jena.atlas.lib.ColumnMap
General descriptor of a reordering (mapping) of columns in tuples to columns in indexes, for example, from triples to triple index order. Naming: map is convert to the reordered form, fetch is get back.

    static NodeId n6 = new NodeId(0x6666666666666666L) ; 
    
    static TupleIndexRecord create(String description)
    {
        RangeIndex rIdx = IndexBuilder.mem().newRangeIndex(FileSet.mem(), factory) ;
        ColumnMap cmap = new ColumnMap("SPO", description) ;
        TupleIndexRecord index = new TupleIndexRecord(3, cmap, description, factory, rIdx) ;
        return index ;
    }

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    protected TupleIndex makeTupleIndex(Location location, String name, String primary, String indexOrder)
    {
        // Commonly,  name == indexOrder.
        // FileSet
        FileSet fs = new FileSet(location, name) ;
        ColumnMap colMap = new ColumnMap(primary, indexOrder) ;
        return tupleIndexBuilder.buildTupleIndex(fs, colMap, indexOrder) ;
    }

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    protected TupleIndex makeTupleIndex(Location location, String name, String primary, String indexOrder)
    {
        // Commonly,  name == indexOrder.
        // FileSet
        FileSet fs = new FileSet(location, name) ;
        ColumnMap colMap = new ColumnMap(primary, indexOrder) ;
        return tupleIndexBuilder.buildTupleIndex(fs, colMap, indexOrder) ;
    }

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        else
        {
            throw new AtlasException("Index name: "+indexName) ;
        }
        
        ColumnMap colMap = new ColumnMap(primaryOrder, indexName) ;




        // -1? Write only.
        // Also flush cache every so often => block writes (but not sequential so boring).
        int readCacheSize = 10 ;

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    private static TupleIndex createTupleIndex(IndexBuilder indexBuilder, RecordFactory recordFactory, Location location, String primary, String desc)
    {
        // Map name of index to name of file.
        FileSet fileset = new FileSet(location, desc) ;
        RangeIndex rIdx1 = indexBuilder.newRangeIndex(fileset, recordFactory) ;
        TupleIndex tupleIndex = new TupleIndexRecord(desc.length(), new ColumnMap(primary, desc), desc, recordFactory, rIdx1) ; 
        return tupleIndex ;
    }

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        }
        // Problems with spotting the index technology.
        FileSet fileset = null ; //FileSet.fromFilename(filename) ;
        
        RangeIndex rIndex = IndexBuilder.createRangeIndex(fileset, rf) ;
        return new TupleIndexRecord(desc.length(), new ColumnMap(primary, desc), desc, rf, rIndex) ;
    }

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    protected TupleIndex makeTupleIndex(Location location, String name, String primary, String indexOrder)
    {
        // Commonly,  name == indexOrder.
        // FileSet
        FileSet fs = new FileSet(location, name) ;
        ColumnMap colMap = new ColumnMap(primary, indexOrder) ;
        return tupleIndexBuilder.buildTupleIndex(fs, colMap, indexOrder) ;
    }

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    protected TupleIndex makeTupleIndex(Location location, String name, String primary, String indexOrder)
    {
        // Commonly,  name == indexOrder.
        // FileSet
        FileSet fs = new FileSet(location, name) ;
        ColumnMap colMap = new ColumnMap(primary, indexOrder) ;
        return tupleIndexBuilder.buildTupleIndex(fs, colMap, indexOrder) ;
    }

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