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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
*
* 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
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* KIND, either express or implied. See the License for the
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package org.apache.cassandra.db.transform;
import org.apache.cassandra.db.DeletionPurger;
import org.apache.cassandra.db.rows.*;
public final class Filter extends Transformation
{
private final long nowInSec;
private final boolean enforceStrictLiveness;
public Filter(long nowInSec, boolean enforceStrictLiveness)
{
this.nowInSec = nowInSec;
this.enforceStrictLiveness = enforceStrictLiveness;
}
@Override
protected RowIterator applyToPartition(BaseRowIterator iterator)
{
return iterator instanceof UnfilteredRows
? new FilteredRows(this, (UnfilteredRows) iterator)
: new FilteredRows((UnfilteredRowIterator) iterator, this);
}
@Override
protected Row applyToStatic(Row row)
{
if (row.isEmpty())
return Rows.EMPTY_STATIC_ROW;
row = row.purge(DeletionPurger.PURGE_ALL, nowInSec, enforceStrictLiveness);
return row == null ? Rows.EMPTY_STATIC_ROW : row;
}
@Override
protected Row applyToRow(Row row)
{
return row.purge(DeletionPurger.PURGE_ALL, nowInSec, enforceStrictLiveness);
}
@Override
protected RangeTombstoneMarker applyToMarker(RangeTombstoneMarker marker)
{
return null;
}
}