org.modeshape.jcr.query.engine.process.SecureSequence Maven / Gradle / Ivy
/*
* ModeShape (http://www.modeshape.org)
*
* Licensed 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.modeshape.jcr.query.engine.process;
import org.modeshape.jcr.cache.CachedNode;
import org.modeshape.jcr.query.JcrQueryContext;
import org.modeshape.jcr.query.NodeSequence;
/**
* A {@link org.modeshape.jcr.query.NodeSequence} implementation which only returns nodes on which an existing query context
* has {@link org.modeshape.jcr.ModeShapePermissions#READ} permissions.
*
* @author Horia Chiorean ([email protected])
*/
public class SecureSequence extends DelegatingSequence {
protected final JcrQueryContext context;
/**
* Creates a new secure sequence over an existing sequence.
*
* @param delegate a {@link org.modeshape.jcr.query.NodeSequence} which is being wrapped; may not be null
* @param context the {@link org.modeshape.jcr.query.JcrQueryContext} for which the permissions are checked.
*/
public SecureSequence( NodeSequence delegate,
JcrQueryContext context ) {
super(delegate);
this.context = context;
}
@Override
public Batch nextBatch() {
Batch nextBatch = super.nextBatch();
return NodeSequence.batchFilteredWith(nextBatch, new NodeSequence.RowFilter() {
@Override
public boolean isCurrentRowValid( Batch batch ) {
CachedNode node = batch.getNode();
return context.canRead(node);
}
});
}
@Override
public long getRowCount() {
//we do not know up front how many rows there will be
return -1;
}
@Override
public String toString() {
return "(secure " + super.delegate + ")";
}
}
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