/*
* 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.permissions.model.impl;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.function.Function;
import java.util.function.Predicate;
import org.apache.jena.permissions.SecurityEvaluator.Action;
import org.apache.jena.permissions.model.SecuredModel;
import org.apache.jena.permissions.model.SecuredStatement;
import org.apache.jena.permissions.utils.PermStatementFilter;
import org.apache.jena.rdf.model.Statement ;
import org.apache.jena.rdf.model.StmtIterator ;
import org.apache.jena.util.iterator.ExtendedIterator ;
/**
* A secured StatementIterator implementation
*/
public class SecuredStatementIterator implements StmtIterator
{
private class PermStatementMap implements Function<Statement, Statement>
{
private final SecuredModel securedModel;
public PermStatementMap( final SecuredModel securedModel )
{
this.securedModel = securedModel;
}
@Override
public SecuredStatement apply( final Statement o )
{
return SecuredStatementImpl.getInstance(securedModel, o);
}
}
private final ExtendedIterator<Statement> iter;
/**
* Constructor.
*
* @param securedModel
* The item providing the security context.
* @param wrapped
* The iterator to wrap.
*/
public SecuredStatementIterator( final SecuredModel securedModel,
final ExtendedIterator<Statement> wrapped )
{
final PermStatementFilter filter = new PermStatementFilter(
new Action[] { Action.Read }, securedModel);
final PermStatementMap map1 = new PermStatementMap(securedModel);
iter = wrapped.filterKeep(filter).mapWith(map1);
}
@Override
public <X extends Statement> ExtendedIterator<Statement> andThen(
final Iterator<X> other )
{
return iter.andThen(other);
}
@Override
public void close()
{
iter.close();
}
@Override
public ExtendedIterator<Statement> filterDrop( final Predicate<Statement> f )
{
return iter.filterDrop(f);
}
@Override
public ExtendedIterator<Statement> filterKeep( final Predicate<Statement> f )
{
return iter.filterKeep(f);
}
@Override
public boolean hasNext()
{
return iter.hasNext();
}
@Override
public <U> ExtendedIterator<U> mapWith( final Function<Statement, U> map1 )
{
return iter.mapWith(map1);
}
@Override
public Statement next()
{
return iter.next();
}
@Override
public Statement nextStatement() throws NoSuchElementException
{
return next();
}
@Override
public void remove()
{
iter.remove();
}
@Override
public Statement removeNext()
{
return iter.removeNext();
}
@Override
public List<Statement> toList()
{
return iter.toList();
}
@Override
public Set<Statement> toSet()
{
return iter.toSet();
}
}