/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.processor.relational;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.mockito.Mockito;
import org.teiid.common.buffer.BlockedException;
import org.teiid.common.buffer.TupleBatch;
import org.teiid.common.buffer.TupleBuffer;
import org.teiid.common.buffer.TupleSource;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.TeiidProcessingException;
/**
*/
public class FakeRelationalNode extends RelationalNode {
// For raw data mode
private List[] data;
// For tuple source mode
private TupleSource source;
private int batchSize;
// State
private int currentRow;
private boolean useBuffer;
/**
* Constructor for FakeRelationalNode.
* @param nodeID
*/
public FakeRelationalNode(int nodeID, List[] data) {
super(nodeID);
this.data = data;
this.currentRow = 0;
}
@Override
public void reset() {
super.reset();
this.currentRow = 0;
}
public FakeRelationalNode(int nodeID, List[] data, int batchSize) {
super(nodeID);
this.data = data;
this.currentRow = 0;
this.batchSize = batchSize;
}
public FakeRelationalNode(int nodeID, TupleSource source, int batchSize) {
super(nodeID);
this.source = source;
this.batchSize = batchSize;
}
/**
* @throws TeiidProcessingException
* @see com.metamatrix.query.processor.relational.x.RelationalNode#nextBatch()
*/
public TupleBatch nextBatchDirect() throws BlockedException, TeiidComponentException, TeiidProcessingException {
if(data != null) {
if(currentRow < data.length) {
int endRow = Math.min(data.length, currentRow+getBatchSize());
List batchRows = new ArrayList();
for(int i=currentRow; i<endRow; i++) {
batchRows.add(data[i]);
}
TupleBatch batch = new TupleBatch(currentRow+1, batchRows);
currentRow += batch.getRowCount();
if(currentRow >= data.length) {
batch.setTerminationFlag(true);
}
return batch;
}
TupleBatch batch = new TupleBatch(currentRow+1, Collections.EMPTY_LIST);
batch.setTerminationFlag(true);
return batch;
}
boolean last = false;
List rows = new ArrayList(batchSize);
for(int i=0; i<batchSize; i++) {
List tuple = source.nextTuple();
if(tuple == null) {
last = true;
break;
}
rows.add(tuple);
}
TupleBatch batch = new TupleBatch(currentRow+1, rows);
if(last) {
batch.setTerminationFlag(true);
} else {
currentRow += rows.size();
}
return batch;
}
@Override
public boolean hasBuffer() {
return useBuffer;
}
@Override
protected TupleBuffer getBufferDirect(int maxRows) throws BlockedException,
TeiidComponentException, TeiidProcessingException {
TupleBuffer tb = Mockito.mock(TupleBuffer.class);
Mockito.stub(tb.getRowCount()).toReturn((long)(maxRows != -1 ? Math.min(maxRows, data.length) : data.length));
return tb;
}
/**
* @see org.teiid.query.processor.relational.RelationalNode#getBatchSize()
* @since 4.2
*/
protected int getBatchSize() {
if(this.batchSize != 0) {
return this.batchSize;
}
return super.getBatchSize();
}
public Object clone(){
throw new UnsupportedOperationException();
}
public void setUseBuffer(boolean useBuffer) {
this.useBuffer = useBuffer;
}
}