/*
* 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 "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.apache.vxquery.runtime.functions.sequence;
import java.io.IOException;
import org.apache.vxquery.datamodel.accessors.SequencePointable;
import org.apache.vxquery.datamodel.accessors.TaggedValuePointable;
import org.apache.vxquery.datamodel.builders.sequence.SequenceBuilder;
import org.apache.vxquery.datamodel.values.ValueTag;
import org.apache.vxquery.exceptions.ErrorCode;
import org.apache.vxquery.exceptions.SystemException;
import org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluator;
import org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluatorFactory;
import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
import edu.uci.ics.hyracks.algebricks.runtime.base.IScalarEvaluator;
import edu.uci.ics.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
import edu.uci.ics.hyracks.data.std.api.IPointable;
import edu.uci.ics.hyracks.data.std.primitive.LongPointable;
import edu.uci.ics.hyracks.data.std.primitive.VoidPointable;
import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
public class FnRemoveScalarEvaluatorFactory extends AbstractTaggedValueArgumentScalarEvaluatorFactory {
private static final long serialVersionUID = 1L;
public FnRemoveScalarEvaluatorFactory(IScalarEvaluatorFactory[] args) {
super(args);
}
@Override
protected IScalarEvaluator createEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args)
throws AlgebricksException {
final ArrayBackedValueStorage abvs = new ArrayBackedValueStorage();
final SequenceBuilder sb = new SequenceBuilder();
final SequencePointable seq = new SequencePointable();
final VoidPointable p = (VoidPointable) VoidPointable.FACTORY.createPointable();
final LongPointable longp = (LongPointable) LongPointable.FACTORY.createPointable();
return new AbstractTaggedValueArgumentScalarEvaluator(args) {
@Override
protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException {
try {
TaggedValuePointable tvp2 = args[1];
if (tvp2.getTag() != ValueTag.XS_INTEGER_TAG) {
throw new SystemException(ErrorCode.FORG0006);
}
tvp2.getValue(longp);
abvs.reset();
sb.reset(abvs);
TaggedValuePointable tvp1 = args[0];
if (tvp1.getTag() == ValueTag.SEQUENCE_TAG) {
tvp1.getValue(seq);
int seqLen = seq.getEntryCount();
if (longp.getLong() < 1 || longp.getLong() > seqLen) {
// Position is outside the sequence. Return target.
result.set(tvp1);
return;
} else {
for (int j = 0; j < seqLen; ++j) {
if (longp.getLong() != j + 1) {
seq.getEntry(j, p);
sb.addItem(p);
}
}
}
} else if (longp.getLong() != 1) {
// Position does not match the item. Return target.
result.set(tvp1);
return;
}
sb.finish();
result.set(abvs);
} catch (IOException e) {
throw new SystemException(ErrorCode.SYSE0001);
}
}
};
}
}