/*
* 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.sdb.compiler;
import java.util.ArrayList;
import com.hp.hpl.jena.sdb.core.SDBRequest;
import com.hp.hpl.jena.sdb.core.sqlnode.SqlNode;
import org.apache.jena.atlas.iterator.Iter ;
public class SqlStageList extends ArrayList<SqlStage>
{
public SqlNode build(SDBRequest request, SlotCompiler slotCompiler)
{
SqlNode sqlNode = null ;
// See QuadCompilerBase.compile
for ( SqlStage s : this )
{
SqlNode sNode = s.build(request, slotCompiler) ;
if ( sNode != null )
sqlNode = SqlBuilder.innerJoin(request, sqlNode, sNode) ;
}
return sqlNode ;
}
@Override
public String toString()
{
String str = "SqlStageList::" ;
if ( isEmpty() )
str = str + " (empty)" ;
else
str = str + " "+ Iter.asString(this, " // " ) ;
//str = str + "\n" ;
return str ;
}
}