/*
* 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.sdb.core;
import java.util.HashMap ;
import java.util.HashSet ;
import java.util.Map ;
import java.util.Set ;
import org.apache.jena.sdb.core.sqlexpr.SqlColumn ;
import org.apache.jena.sparql.core.Var ;
import org.slf4j.Logger ;
import org.slf4j.LoggerFactory ;
public class ScopeRename implements Scope
{
private static Logger log = LoggerFactory.getLogger(ScopeRename.class) ;
private Scope scope ;
private Map<Var, SqlColumn> frame = new HashMap<Var, SqlColumn>() ;
public ScopeRename(Scope oldScope)
{ this.scope = oldScope ; }
// See ScopeBase for commonality of code
public void setAlias(Var var, SqlColumn col)
{
if ( ! scope.hasColumnForVar(var) )
log.warn("No underlying column for variable "+var) ;
frame.put(var, col) ;
}
@Override
public ScopeEntry findScopeForVar(Var var)
{
check(var) ;
if ( ! frame.containsKey(var) )
return null ;
ScopeEntry e = new ScopeEntry(var, frame.get(var) ) ;
e.setStatus(scope.findScopeForVar(var).getStatus()) ;
return e ;
// ScopeEntry e = scope.findScopeForVar(var) ;
// if ( e == null )
// return null ;
// return converter.convert(e) ;
}
@Override
public Set<ScopeEntry> findScopes()
{
Set<ScopeEntry> x = new HashSet<ScopeEntry>() ;
for ( Var v : frame.keySet() )
{
ScopeEntry e = findScopeForVar(v) ;
x.add(e) ;
}
return x ;
// Set<ScopeEntry> x = scope.findScopes() ;
// x = toSet(map(x, converter)) ;
// return x ;
}
@Override
public boolean isEmpty()
{ return frame.isEmpty() ; }
@Override
public Set<Var> getVars()
{
return frame.keySet() ;
}
@Override
public boolean hasColumnForVar(Var var)
{
check(var) ;
return frame.containsKey(var) ;
}
private void check(Var var)
{
if ( true )
{
boolean sub = scope.hasColumnForVar(var) ;
boolean res = frame.containsKey(var) ;
if ( sub && ! res )
log.warn("Corruption: in subscope but not in aliases: "+var) ;
if ( ! sub && res )
log.warn("Corruption: not in subscope but in aliases: "+var) ;
}
}
@Override
public String toString()
{
return frame + " " + scope ;
}
}