/*
* 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.function.aggregate;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;
import org.teiid.api.exception.query.ExpressionEvaluationException;
import org.teiid.api.exception.query.FunctionExecutionException;
import org.teiid.common.buffer.impl.SizeUtility;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.TeiidProcessingException;
import org.teiid.core.types.ArrayImpl;
import org.teiid.core.types.DataTypeManager;
import org.teiid.query.QueryPlugin;
import org.teiid.query.util.CommandContext;
public class ArrayAgg extends SingleArgumentAggregateFunction {
private static final int MAX_SIZE = 1 << 23;
private ArrayList<Object> result;
private Class<?> componentType;
private long size;
private int elemSize;
@Override
public void initialize(Class<?> dataType, Class<?> inputType) {
this.componentType = inputType;
if (!SizeUtility.isVariableSize(componentType)) {
elemSize = SizeUtility.getSize(false, componentType);
}
}
@Override
public void addInputDirect(Object input, List<?> tuple, CommandContext commandContext) throws TeiidComponentException, TeiidProcessingException {
if (this.result == null) {
this.result = new ArrayList<Object>();
size = 0;
}
this.result.add(input);
size += SizeUtility.REFERENCE_SIZE;
if (input != null) {
if (elemSize != 0) {
size += elemSize;
} else {
size += SizeUtility.getSize(input, false);
}
}
if (size > MAX_SIZE) {
throw new TeiidProcessingException(QueryPlugin.Event.TEIID31209, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31209, MAX_SIZE));
}
}
@Override
public Object getResult(CommandContext commandContext) throws FunctionExecutionException, ExpressionEvaluationException, TeiidComponentException,TeiidProcessingException {
if (this.result == null) {
return null;
}
if (this.componentType == DataTypeManager.DefaultDataClasses.OBJECT) {
return new ArrayImpl(this.result.toArray());
}
Object array = Array.newInstance(componentType, this.result.size());
for (int i = 0; i < result.size(); i++) {
Object val = result.get(i);
if (val instanceof ArrayImpl) {
val = ((ArrayImpl)val).getValues();
}
Array.set(array, i, val);
}
return new ArrayImpl((Object[]) array);
}
@Override
public void reset() {
this.result = null;
}
@Override
public boolean respectsNull() {
return true;
}
}