/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.nephele.services.memorymanager;
import java.util.List;
import eu.stratosphere.core.memory.MemorySegment;
import eu.stratosphere.core.memory.MemorySegmentSource;
/**
* Simple memory segment source that draws segments from a list.
*
*/
public class ListMemorySegmentSource implements MemorySegmentSource
{
private final List<MemorySegment> segments;
public ListMemorySegmentSource(final List<MemorySegment> memorySegments) {
this.segments = memorySegments;
}
@Override
public MemorySegment nextSegment() {
if (this.segments.size() > 0) {
return this.segments.remove(this.segments.size() - 1);
} else {
return null;
}
}
}