/*
* 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.node;
import java.io.DataInputStream;
import org.apache.vxquery.datamodel.accessors.SequencePointable;
import org.apache.vxquery.datamodel.accessors.TaggedValuePointable;
import org.apache.vxquery.datamodel.values.ValueTag;
import org.apache.vxquery.datamodel.values.XDMConstants;
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 org.apache.vxquery.runtime.functions.util.FunctionHelper;
import org.apache.vxquery.xmlparser.ITreeNodeIdProvider;
import org.apache.vxquery.xmlparser.TreeNodeIdProvider;
import org.apache.vxquery.xmlparser.XMLParser;
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.UTF8StringPointable;
import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
import edu.uci.ics.hyracks.dataflow.common.comm.util.ByteBufferInputStream;
public class FnDocScalarEvaluatorFactory extends AbstractTaggedValueArgumentScalarEvaluatorFactory {
private static final long serialVersionUID = 1L;
public FnDocScalarEvaluatorFactory(IScalarEvaluatorFactory[] args) {
super(args);
}
@Override
protected IScalarEvaluator createEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args)
throws AlgebricksException {
final ArrayBackedValueStorage abvs = new ArrayBackedValueStorage();
final UTF8StringPointable stringp = (UTF8StringPointable) UTF8StringPointable.FACTORY.createPointable();
final SequencePointable seqp = (SequencePointable) SequencePointable.FACTORY.createPointable();
final ByteBufferInputStream bbis = new ByteBufferInputStream();
final DataInputStream di = new DataInputStream(bbis);
final int partition = ctx.getTaskAttemptId().getTaskId().getPartition();
final ITreeNodeIdProvider nodeIdProvider = new TreeNodeIdProvider((short) partition);
final String nodeId = ctx.getJobletContext().getApplicationContext().getNodeId();
return new AbstractTaggedValueArgumentScalarEvaluator(args) {
@Override
protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException {
TaggedValuePointable tvp = args[0];
if (tvp.getTag() == ValueTag.SEQUENCE_TAG) {
tvp.getValue(seqp);
if (seqp.getEntryCount() == 0) {
XDMConstants.setEmptySequence(result);
return;
} else {
throw new SystemException(ErrorCode.FORG0006);
}
}
if (tvp.getTag() != ValueTag.XS_STRING_TAG) {
throw new SystemException(ErrorCode.FORG0006);
}
tvp.getValue(stringp);
try {
// Only one document should be parsed so its ok to have a unique parser.
XMLParser parser = new XMLParser(false, nodeIdProvider, nodeId);
FunctionHelper.readInDocFromPointable(stringp, bbis, di, abvs, parser);
} catch (Exception e) {
throw new SystemException(ErrorCode.SYSE0001, e);
}
result.set(abvs);
}
};
}
}