/*
* 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 org.apache.jena.tdb.store.bulkloader2;
import java.io.IOException ;
import java.io.OutputStream ;
import org.apache.jena.atlas.AtlasException ;
import org.apache.jena.atlas.lib.Hex ;
/** Buffered writer of rows of longs, in hex. */
public class WriteRows
{
private OutputStream output ;
boolean atStartOfRow = true ;
private int itemsPerRow ;
private int rowBlock ;
private byte[] b ;
private int idx ;
private int rows ;
private int rowLength ;
WriteRows (OutputStream output, int itemsPerRow, int rowBlock)
{
this.output = output ;
this.itemsPerRow = itemsPerRow ;
this.rowLength = 16*itemsPerRow + itemsPerRow ;
this.rowBlock = rowBlock ;
this.b = new byte[rowLength*rowBlock] ;
this.idx = 0 ;
this.rows = 0 ;
}
public void write(long value)
{
if ( !atStartOfRow )
{
b[idx] = ' ' ;
idx++ ;
}
else
atStartOfRow = false;
idx += Hex.formatUnsignedLongHex(b, idx, value, 16) ;
}
public void endOfRow()
{
b[idx] = '\n' ;
idx++ ;
atStartOfRow = true ;
rows++ ;
if ( rows == rowBlock )
flush() ;
}
public void flush()
{
try { output.write(b, 0, rows * rowLength) ; }
catch (IOException e) { throw new AtlasException(e) ; }
idx = 0 ;
rows = 0 ;
}
public void close()
{
flush() ;
try { output.flush() ; }
catch (IOException e) { throw new AtlasException(e) ; }
}
}