/*
* 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.base.record;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.jena.atlas.iterator.Iter ;
import org.apache.jena.atlas.iterator.Transform ;
import org.apache.jena.atlas.lib.Bytes ;
import com.hp.hpl.jena.tdb.base.record.Record;
import com.hp.hpl.jena.tdb.base.record.RecordFactory;
/** Record support operations (mainly for testing using ints) */
public class RecordLib
{
// Size of a record when testing (one integer)
public final static int TestRecordLength = 4 ;
public final static RecordFactory recordFactory = new RecordFactory(TestRecordLength, 0) ;
public static Record intToRecord(int v) { return intToRecord(v, recordFactory) ; }
public static Record intToRecord(int v, int recLen) { return intToRecord(v, new RecordFactory(recLen, 0)) ; }
public static Record intToRecord(int v, RecordFactory factory)
{
byte[] vb = Bytes.packInt(v) ;
int recLen = factory.recordLength() ;
byte[] bb = new byte[recLen] ;
int x = 0 ; // Start point in bb.
if ( recLen > 4 )
x = recLen-4 ;
int len = Math.min(4, recLen) ;
int z = 4-len ; // Start point in vb
// Furthest right bytes.
for ( int i = len-1 ; i >= 0 ; i-- )
bb[x+i] = vb[z+i] ;
return factory.create(bb) ;
}
public static List<Record> intToRecord(int[] v) { return intToRecord(v, recordFactory) ; }
public static List<Record> intToRecord(int[] v, int recLen)
{ return intToRecord(v, new RecordFactory(recLen, 0)) ; }
static List<Record> intToRecord(int[] v, RecordFactory factory)
{
List<Record> x = new ArrayList<Record>() ;
for ( int i : v )
x.add(intToRecord(i, factory)) ;
return x ;
}
public static int recordToInt(Record key)
{
return Bytes.getInt(key.getKey()) ;
}
public static List<Integer> toIntList(Iterator<Record> iter)
{
return Iter.toList(Iter.map(iter, new Transform<Record, Integer>(){
@Override
public Integer convert(Record item)
{
return recordToInt(item) ;
}}
)) ;
}
public static Record r(int v)
{
return RecordLib.intToRecord(v, RecordLib.TestRecordLength) ;
}
public static int r(Record rec)
{
return RecordLib.recordToInt(rec) ;
}
public static List<Integer> toIntList(int... vals)
{
List<Integer> x = new ArrayList<Integer>() ;
for ( int i : vals )
x.add(i) ;
return x ;
}
public static List<Integer> r(Iterator<Record> iter)
{
return RecordLib.toIntList(iter) ;
}
}