/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hp.hpl.jena.tdb.store.bulkloader2;
import java.io.IOException ;
import java.io.InputStream ;
import java.io.PrintStream ;
import java.util.Iterator ;
import java.util.NoSuchElementException ;
import org.apache.jena.atlas.AtlasException ;
import org.apache.jena.atlas.lib.Bytes ;
import org.apache.jena.atlas.lib.ColumnMap ;
import org.apache.jena.atlas.lib.Hex ;
import com.hp.hpl.jena.tdb.base.record.Record ;
import com.hp.hpl.jena.tdb.base.record.RecordFactory ;
import com.hp.hpl.jena.tdb.sys.SystemTDB ;
final
public class RecordsFromInput implements Iterator<Record>
{
private final InputStream input ;
private Record slot = null ;
private boolean finished = false ;
private final byte[] buffer ;
private int len = -1 ;
private int idx ; // Where in buffer.
private final int rowLength ;
private final int rowBlockSize ;
private final RecordFactory recordFactory ;
private final int itemsPerRow ;
private final ColumnMap colMap ;
public RecordsFromInput(InputStream input, int itemsPerRow, ColumnMap colMap, int rowBlockSize)
{
this.input = input ;
this.itemsPerRow = itemsPerRow ;
this.colMap = colMap ;
this.rowLength = itemsPerRow*16 + itemsPerRow ; // Length in bytes of a row.
this.rowBlockSize = rowBlockSize ;
this.buffer = new byte[rowLength*rowBlockSize] ;
this.idx = -1 ;
this.recordFactory = new RecordFactory(itemsPerRow*SystemTDB.SizeOfNodeId, 0) ;
}
@Override
public boolean hasNext()
{
if ( finished ) return false ;
if ( slot != null )
return true ;
if ( idx == -1 || idx == buffer.length )
{
len = fill() ;
if ( len == -1 )
{
finished = true ;
return false ;
}
idx = 0 ;
}
// Fill one slot.
Record record = recordFactory.create() ;
// System.out.print("In: ") ;
for ( int i = 0 ; i < itemsPerRow ; i++ )
{
long x = Hex.getLong(buffer, idx) ;
idx += 16 ;
// Separator or end-of-line.
idx++ ;
int j = ( colMap == null ) ? i : colMap.mapSlotIdx(i) ;
int recordOffset = j*SystemTDB.SizeOfLong ;
Bytes.setLong(x, record.getKey(), recordOffset) ;
// System.out.printf("%016X ", x) ;
}
// System.out.println() ;
// System.out.print("Out: ") ;
// printRecord(System.out, record, itemsPerRow) ;
// Buffer all processed.
if ( idx >= len )
idx = -1 ;
slot = record ;
return true ;
}
private static void printRecord(PrintStream out, Record r, int keyUnitLen)
{
int keySubLen = r.getKey().length/keyUnitLen ;
for ( int i = 0 ; i < keyUnitLen ; i++ )
{
if ( i != 0 )
out.print(" ") ;
// Print in chunks
int k = i*keySubLen ;
for ( int j = k ; j < k+keySubLen ; j++ )
out.printf("%02x", r.getKey()[j]) ;
// long x = Bytes.getLong(r.getKey(), i*SystemTDB.SizeOfNodeId) ;
// System.out.printf("%016x", x) ;
}
out.println() ;
}
private int fill()
{
try {
int len = 0 ;
while ( len < buffer.length ) {
int count = input.read(buffer, len, buffer.length - len) ;
if ( count == -1 ) break ;
len += count ;
}
if ( len == 0 ) return -1 ;
if ( len%rowLength != 0 )
throw new AtlasException("Wrong length: "+len) ;
return len ;
} catch (IOException ex) { throw new AtlasException(ex) ; }
}
@Override
public Record next()
{
if ( !hasNext() ) throw new NoSuchElementException() ;
Record r = slot ;
slot = null ;
return r ;
}
@Override
public void remove()
{ throw new UnsupportedOperationException() ; }
}