| /* |
| * 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.parquet.format.event; |
| |
| import org.apache.thrift.TException; |
| import org.apache.thrift.protocol.TField; |
| import org.apache.thrift.protocol.TList; |
| import org.apache.thrift.protocol.TMap; |
| import org.apache.thrift.protocol.TProtocol; |
| import org.apache.thrift.protocol.TSet; |
| import org.apache.thrift.protocol.TType; |
| |
| import org.apache.parquet.format.event.TypedConsumer.ListConsumer; |
| import org.apache.parquet.format.event.TypedConsumer.MapConsumer; |
| import org.apache.parquet.format.event.TypedConsumer.SetConsumer; |
| |
| /** |
| * Event based reader for Thrift |
| * |
| * @author Julien Le Dem |
| * @deprecated java code moved to the parquet-mr project: See org.apache.parquet:parquet-format-structures; Will be |
| * removed from here |
| */ |
| @Deprecated |
| public final class EventBasedThriftReader { |
| |
| private final TProtocol protocol; |
| |
| /** |
| * @param protocol the protocol to read from |
| */ |
| public EventBasedThriftReader(TProtocol protocol) { |
| this.protocol = protocol; |
| } |
| |
| /** |
| * reads a Struct from the underlying protocol and passes the field events to the FieldConsumer |
| * @param c the field consumer |
| * @throws TException |
| */ |
| public void readStruct(FieldConsumer c) throws TException { |
| protocol.readStructBegin(); |
| readStructContent(c); |
| protocol.readStructEnd(); |
| } |
| |
| /** |
| * reads the content of a struct (fields) from the underlying protocol and passes the events to c |
| * @param c the field consumer |
| * @throws TException |
| */ |
| public void readStructContent(FieldConsumer c) throws TException { |
| TField field; |
| while (true) { |
| field = protocol.readFieldBegin(); |
| if (field.type == TType.STOP) { |
| break; |
| } |
| c.consumeField(protocol, this, field.id, field.type); |
| } |
| } |
| |
| /** |
| * reads the set content (elements) from the underlying protocol and passes the events to the set event consumer |
| * @param eventConsumer the consumer |
| * @param tSet the set descriptor |
| * @throws TException |
| */ |
| public void readSetContent(SetConsumer eventConsumer, TSet tSet) |
| throws TException { |
| for (int i = 0; i < tSet.size; i++) { |
| eventConsumer.consumeElement(protocol, this, tSet.elemType); |
| } |
| } |
| |
| /** |
| * reads the map content (key values) from the underlying protocol and passes the events to the map event consumer |
| * @param eventConsumer the consumer |
| * @param tMap the map descriptor |
| * @throws TException |
| */ |
| public void readMapContent(MapConsumer eventConsumer, TMap tMap) |
| throws TException { |
| for (int i = 0; i < tMap.size; i++) { |
| eventConsumer.consumeEntry(protocol, this, tMap.keyType, tMap.valueType); |
| } |
| } |
| |
| /** |
| * reads a key-value pair |
| * @param keyType the type of the key |
| * @param keyConsumer the consumer for the key |
| * @param valueType the type of the value |
| * @param valueConsumer the consumer for the value |
| * @throws TException |
| */ |
| public void readMapEntry(byte keyType, TypedConsumer keyConsumer, byte valueType, TypedConsumer valueConsumer) |
| throws TException { |
| keyConsumer.read(protocol, this, keyType); |
| valueConsumer.read(protocol, this, valueType); |
| } |
| |
| /** |
| * reads the list content (elements) from the underlying protocol and passes the events to the list event consumer |
| * @param eventConsumer the consumer |
| * @param tList the list descriptor |
| * @throws TException |
| */ |
| public void readListContent(ListConsumer eventConsumer, TList tList) |
| throws TException { |
| for (int i = 0; i < tList.size; i++) { |
| eventConsumer.consumeElement(protocol, this, tList.elemType); |
| } |
| } |
| } |