| /* |
| * 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.strings; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| 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.primitive.VoidPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.hyracks.data.std.util.GrowableArray; |
| import org.apache.hyracks.data.std.util.UTF8StringBuilder; |
| 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.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 class FnCodepointsToStringEvaluatorFactory extends AbstractTaggedValueArgumentScalarEvaluatorFactory { |
| private static final long serialVersionUID = 1L; |
| private static final int STRING_EXPECTED_LENGTH = 300; |
| |
| public FnCodepointsToStringEvaluatorFactory(IScalarEvaluatorFactory[] args) { |
| super(args); |
| } |
| |
| @Override |
| protected IScalarEvaluator createEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args) |
| throws HyracksDataException { |
| final TaggedValuePointable tvp = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable(); |
| final LongPointable longp = (LongPointable) LongPointable.FACTORY.createPointable(); |
| final SequencePointable seqp = (SequencePointable) SequencePointable.FACTORY.createPointable(); |
| final ArrayBackedValueStorage abvs = new ArrayBackedValueStorage(); |
| final VoidPointable p = (VoidPointable) VoidPointable.FACTORY.createPointable(); |
| final GrowableArray ga = new GrowableArray(); |
| final UTF8StringBuilder sb = new UTF8StringBuilder(); |
| |
| return new AbstractTaggedValueArgumentScalarEvaluator(args) { |
| @Override |
| protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException { |
| TaggedValuePointable tvp1 = args[0]; |
| try { |
| // Byte Format: Type (1 byte) + String Length (X bytes) + String. |
| DataOutput out = abvs.getDataOutput(); |
| out.write(ValueTag.XS_STRING_TAG); |
| |
| ga.reset(); |
| sb.reset(ga, STRING_EXPECTED_LENGTH); |
| |
| // Only accept sequences of integers or an integer as input. |
| if (tvp1.getTag() == ValueTag.SEQUENCE_TAG) { |
| tvp1.getValue(seqp); |
| for (int j = 0; j < seqp.getEntryCount(); ++j) { |
| seqp.getEntry(j, p); |
| tvp.set(p.getByteArray(), p.getStartOffset(), p.getLength()); |
| tvp.getValue(longp); |
| if (!Character.isDefined(longp.intValue())) { |
| throw new SystemException(ErrorCode.FOCH0001); |
| } |
| FunctionHelper.writeChar((char) longp.intValue(), sb); |
| } |
| } else if (tvp1.getTag() == ValueTag.XS_INTEGER_TAG) { |
| tvp1.getValue(longp); |
| if (!Character.isDefined(longp.intValue())) { |
| throw new SystemException(ErrorCode.FOCH0001); |
| } |
| FunctionHelper.writeChar((char) longp.intValue(), sb); |
| } else { |
| throw new SystemException(ErrorCode.FORG0006); |
| } |
| |
| sb.finish(); |
| out.write(ga.getByteArray(), 0, ga.getLength()); |
| |
| result.set(abvs.getByteArray(), abvs.getStartOffset(), abvs.getLength()); |
| } catch (IOException e) { |
| throw new SystemException(ErrorCode.SYSE0001, e); |
| } |
| } |
| }; |
| } |
| } |