| /* |
| * 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.datamodel.accessors.nodes; |
| |
| import org.apache.vxquery.datamodel.accessors.atomic.CodedQNamePointable; |
| |
| import org.apache.hyracks.api.dataflow.value.ITypeTraits; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.api.IPointableFactory; |
| import org.apache.hyracks.data.std.primitive.VoidPointable; |
| |
| /* |
| * Attribute { |
| * NamePtr namePtr; |
| * NamePtr typePtr?; |
| * NodeId nodeId?; |
| * TaggedValue value; |
| * } |
| * |
| * NamePtr { |
| * Integer PrefixCode; |
| * Integer NamespaceCode; |
| * Integer LocalCode; |
| * } |
| */ |
| public class AttributeNodePointable extends AbstractNodePointable { |
| private static final int LOCAL_NODE_ID_SIZE = 4; |
| public static final IPointableFactory FACTORY = new IPointableFactory() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public ITypeTraits getTypeTraits() { |
| return VoidPointable.TYPE_TRAITS; |
| } |
| |
| @Override |
| public IPointable createPointable() { |
| return new AttributeNodePointable(); |
| } |
| }; |
| |
| public void getName(CodedQNamePointable name) { |
| name.set(bytes, getNameOffset(), getNameSize()); |
| } |
| |
| public void getTypeName(NodeTreePointable nodeTree, CodedQNamePointable typeName) { |
| if (nodeTree.typeExists()) { |
| typeName.set(bytes, getTypeOffset(), getTypeSize(nodeTree)); |
| } else { |
| typeName.set(null, -1, -1); |
| } |
| } |
| |
| public void getValue(NodeTreePointable nodeTree, IPointable value) { |
| value.set(bytes, getValueOffset(nodeTree), getValueSize(nodeTree)); |
| } |
| |
| private int getNameOffset() { |
| return start; |
| } |
| |
| private int getNameSize() { |
| return CodedQNamePointable.SIZE; |
| } |
| |
| private int getTypeOffset() { |
| return getNameOffset() + getNameSize(); |
| } |
| |
| private int getTypeSize(NodeTreePointable nodeTree) { |
| return nodeTree.typeExists() ? CodedQNamePointable.SIZE : 0; |
| } |
| |
| protected int getLocalNodeIdOffset(NodeTreePointable nodeTree) { |
| return getTypeOffset() + getTypeSize(nodeTree); |
| } |
| |
| private int getLocalNodeIdSize(NodeTreePointable nodeTree) { |
| return nodeTree.nodeIdExists() ? LOCAL_NODE_ID_SIZE : 0; |
| } |
| |
| private int getValueOffset(NodeTreePointable nodeTree) { |
| return getLocalNodeIdOffset(nodeTree) + getLocalNodeIdSize(nodeTree); |
| } |
| |
| private int getValueSize(NodeTreePointable nodeTree) { |
| return length - (getValueOffset(nodeTree) - start); |
| } |
| } |