| /* |
| * 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.step; |
| |
| import java.io.IOException; |
| |
| import org.apache.vxquery.context.DynamicContext; |
| import org.apache.vxquery.datamodel.accessors.PointablePool; |
| import org.apache.vxquery.datamodel.accessors.SequencePointable; |
| import org.apache.vxquery.datamodel.accessors.TaggedValuePointable; |
| import org.apache.vxquery.datamodel.accessors.nodes.DocumentNodePointable; |
| import org.apache.vxquery.datamodel.accessors.nodes.ElementNodePointable; |
| import org.apache.vxquery.datamodel.accessors.nodes.NodeTreePointable; |
| import org.apache.vxquery.datamodel.builders.nodes.NodeSubTreeBuilder; |
| import org.apache.vxquery.datamodel.values.ValueTag; |
| import org.apache.vxquery.datamodel.values.XDMConstants; |
| |
| import org.apache.hyracks.api.context.IHyracksTaskContext; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| |
| public abstract class AbstractForwardAxisPathStep { |
| protected final DynamicContext dCtx; |
| protected final PointablePool pp; |
| protected final NodeTreePointable ntp = (NodeTreePointable) NodeTreePointable.FACTORY.createPointable(); |
| private final ArrayBackedValueStorage nodeAbvs = new ArrayBackedValueStorage(); |
| private final TaggedValuePointable tvpConvert = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable(); |
| private final DocumentNodePointable dnp = (DocumentNodePointable) DocumentNodePointable.FACTORY.createPointable(); |
| private final ElementNodePointable enp = (ElementNodePointable) ElementNodePointable.FACTORY.createPointable(); |
| private final NodeSubTreeBuilder nstb = new NodeSubTreeBuilder(); |
| |
| public AbstractForwardAxisPathStep(IHyracksTaskContext ctx, PointablePool pp) { |
| dCtx = (DynamicContext) ctx.getJobletContext().getGlobalJobData(); |
| this.pp = pp; |
| } |
| |
| protected void getSequence(TaggedValuePointable tvp, SequencePointable seqp) { |
| switch (tvp.getTag()) { |
| case ValueTag.DOCUMENT_NODE_TAG: |
| tvp.getValue(dnp); |
| dnp.getContent(ntp, seqp); |
| return; |
| |
| case ValueTag.ELEMENT_NODE_TAG: |
| tvp.getValue(enp); |
| if (enp.childrenChunkExists()) { |
| enp.getChildrenSequence(ntp, seqp); |
| return; |
| } |
| } |
| XDMConstants.setEmptySequence(tvpConvert); |
| tvpConvert.getValue(seqp); |
| } |
| |
| protected void setNodeToResult(TaggedValuePointable tvpItem, IPointable result) throws IOException { |
| nodeAbvs.reset(); |
| nstb.reset(nodeAbvs); |
| nstb.setChildNode(ntp, tvpItem); |
| nstb.finish(); |
| result.set(nodeAbvs.getByteArray(), nodeAbvs.getStartOffset(), nodeAbvs.getLength()); |
| } |
| } |