| /* |
| * 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.comparison; |
| |
| import java.io.DataOutput; |
| |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory; |
| import org.apache.hyracks.api.context.IHyracksTaskContext; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.LongPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.vxquery.context.DynamicContext; |
| import org.apache.vxquery.datamodel.accessors.SequencePointable; |
| import org.apache.vxquery.datamodel.accessors.TaggedValuePointable; |
| import org.apache.vxquery.datamodel.accessors.TypedPointables; |
| 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; |
| |
| public abstract class AbstractValueComparisonScalarEvaluatorFactory extends |
| AbstractTaggedValueArgumentScalarEvaluatorFactory { |
| private static final long serialVersionUID = 1L; |
| |
| public AbstractValueComparisonScalarEvaluatorFactory(IScalarEvaluatorFactory[] args) { |
| super(args); |
| } |
| |
| @Override |
| protected IScalarEvaluator createEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args) |
| throws HyracksDataException { |
| final ArrayBackedValueStorage abvs = new ArrayBackedValueStorage(); |
| final DataOutput dOut = abvs.getDataOutput(); |
| final AbstractValueComparisonOperation aOp = createValueComparisonOperation(); |
| final DynamicContext dCtx = (DynamicContext) ctx.getJobletContext().getGlobalJobData(); |
| final SequencePointable seqp = (SequencePointable) SequencePointable.FACTORY.createPointable(); |
| |
| final ArrayBackedValueStorage abvsInteger1 = new ArrayBackedValueStorage(); |
| final DataOutput dOutInteger1 = abvsInteger1.getDataOutput(); |
| final ArrayBackedValueStorage abvsInteger2 = new ArrayBackedValueStorage(); |
| final DataOutput dOutInteger2 = abvsInteger2.getDataOutput(); |
| |
| final TaggedValuePointable tvp1new = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable(); |
| final TaggedValuePointable tvp2new = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable(); |
| final TypedPointables tp1 = new TypedPointables(); |
| final TypedPointables tp2 = new TypedPointables(); |
| |
| return new AbstractTaggedValueArgumentScalarEvaluator(args) { |
| @Override |
| protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException { |
| TaggedValuePointable tvp1 = args[0]; |
| TaggedValuePointable tvp2 = args[1]; |
| |
| if (tvp1.getTag() == ValueTag.SEQUENCE_TAG) { |
| tvp1.getValue(seqp); |
| if (seqp.getEntryCount() == 0) { |
| XDMConstants.setEmptySequence(result); |
| return; |
| } |
| throw new SystemException(ErrorCode.XPTY0004); |
| } |
| if (tvp2.getTag() == ValueTag.SEQUENCE_TAG) { |
| tvp2.getValue(seqp); |
| if (seqp.getEntryCount() == 0) { |
| XDMConstants.setEmptySequence(result); |
| return; |
| } |
| throw new SystemException(ErrorCode.XPTY0004); |
| } |
| |
| boolean booleanResult = transformThenCompareTaggedValues(aOp, tvp1, tvp2, dCtx); |
| try { |
| abvs.reset(); |
| dOut.write(ValueTag.XS_BOOLEAN_TAG); |
| dOut.write(booleanResult ? 1 : 0); |
| result.set(abvs); |
| } catch (Exception e) { |
| throw new SystemException(ErrorCode.SYSE0001, e); |
| } |
| } |
| |
| protected boolean transformThenCompareTaggedValues(AbstractValueComparisonOperation aOp, |
| TaggedValuePointable tvp1, TaggedValuePointable tvp2, DynamicContext dCtx) throws SystemException { |
| try { |
| if (tvp1.getTag() == ValueTag.XS_UNTYPED_ATOMIC_TAG) { |
| // Only need to change tag since the storage is the same for untyped atomic and string. |
| tvp1.getByteArray()[0] = ValueTag.XS_STRING_TAG; |
| tvp1new.set(tvp1); |
| } else if (FunctionHelper.isDerivedFromInteger(tvp1.getTag())) { |
| abvsInteger1.reset(); |
| FunctionHelper.getIntegerPointable(tvp1, dOutInteger1, tp1); |
| tvp1new.set(abvsInteger1.getByteArray(), abvsInteger1.getStartOffset(), |
| LongPointable.TYPE_TRAITS.getFixedLength() + 1); |
| } else { |
| tvp1new.set(tvp1); |
| } |
| if (tvp2.getTag() == ValueTag.XS_UNTYPED_ATOMIC_TAG) { |
| // Only need to change tag since the storage is the same for untyped atomic and string. |
| tvp2.getByteArray()[0] = ValueTag.XS_STRING_TAG; |
| tvp2new.set(tvp2); |
| } else if (FunctionHelper.isDerivedFromInteger(tvp2.getTag())) { |
| abvsInteger2.reset(); |
| FunctionHelper.getIntegerPointable(tvp2, dOutInteger2, tp2); |
| tvp2new.set(abvsInteger2.getByteArray(), abvsInteger2.getStartOffset(), |
| LongPointable.TYPE_TRAITS.getFixedLength() + 1); |
| } else { |
| tvp2new.set(tvp2); |
| } |
| |
| return FunctionHelper.compareTaggedValues(aOp, tvp1new, tvp2new, dCtx, tp1, tp2); |
| } catch (SystemException se) { |
| throw se; |
| } catch (Exception e) { |
| throw new SystemException(ErrorCode.SYSE0001, e); |
| } |
| } |
| }; |
| } |
| |
| protected abstract AbstractValueComparisonOperation createValueComparisonOperation(); |
| } |