Java Type类代码示例

import parquet.schema.Type; //导入依赖的package包/类
private void newSchema() throws IOException {
  List<Type> types = Lists.newArrayList();
  for (MaterializedField field : batchSchema) {
    if (field.getPath().equals(SchemaPath.getSimplePath(WriterPrel.PARTITION_COMPARATOR_FIELD))) {
      continue;
    }
    types.add(getType(field));
  }
  schema = new MessageType("root", types);

  int initialBlockBufferSize = max(MINIMUM_BUFFER_SIZE, blockSize / this.schema.getColumns().size() / 5);
  pageStore = ColumnChunkPageWriteStoreExposer.newColumnChunkPageWriteStore(this.oContext,
      codecFactory.getCompressor(codec, pageSize),
      schema,
      initialBlockBufferSize);
  int initialPageBufferSize = max(MINIMUM_BUFFER_SIZE, min(pageSize + pageSize / 10, initialBlockBufferSize));
  store = new ColumnWriteStoreV1(pageStore, pageSize, initialPageBufferSize, dictionaryPageSize, enableDictionary, writerVersion);
  MessageColumnIO columnIO = new ColumnIOFactory(false).getColumnIO(this.schema);
  consumer = columnIO.getRecordWriter(store);
  setUp(schema, consumer);
}
 

import parquet.schema.Type; //导入依赖的package包/类
private parquet.schema.Type getType(MaterializedField field) {
  MinorType minorType = field.getType().getMinorType();
  DataMode dataMode = field.getType().getMode();
  switch(minorType) {
    case MAP:
      List<parquet.schema.Type> types = Lists.newArrayList();
      for (MaterializedField childField : field.getChildren()) {
        types.add(getType(childField));
      }
      return new GroupType(dataMode == DataMode.REPEATED ? Repetition.REPEATED : Repetition.OPTIONAL, field.getLastName(), types);
    case LIST:
      throw new UnsupportedOperationException("Unsupported type " + minorType);
    default:
      return getPrimitiveType(field);
  }
}
 

import parquet.schema.Type; //导入依赖的package包/类
private void writeTuple(Tuple tuple, GroupType type) {
    for (int index = 0; index < type.getFieldCount(); index++) {
        Type fieldType = type.getType(index);
        String fieldName = fieldType.getName();
        // empty fields have to be omitted
        if (tuple.isNull(index))
            continue;
        recordConsumer.startField(fieldName, index);
        if (fieldType.isPrimitive()) {
            tuple.writePrimitiveValue(recordConsumer, index, (PrimitiveType)fieldType);
        }
        else {
            recordConsumer.startGroup();
            writeTuple(tuple.getTuple(index), fieldType.asGroupType());
            recordConsumer.endGroup();
        }
        recordConsumer.endField(fieldName, index);
    }
}
 

import parquet.schema.Type; //导入依赖的package包/类
/**
 * init the scan filter with the read schema
 * @param scan
 */
public void initScanFilter(Scan scan){
    String schema = new String(scan.getAttribute(HConstants.SCAN_TABLE_SCHEMA));
    try {
        if (scan != null && schema != null && !schema.isEmpty()) {
            MessageType readSchema = MessageTypeParser.parseMessageType(schema);
            //readSchema.getFields();
            List<Type>  types = readSchema.getFields();
            for(Type type : types){
                String  columnName = type.getName();
                if(columnName.startsWith("cf"))// fetch the real column name
                    columnName = columnName.substring(3);
                filterColumns.add(columnName.getBytes());
            }

        }
    }catch (Exception e){
        //TODO: send the exception back to the client
        LOG.error("parse the message schema error" + e);
    }
}
 

import parquet.schema.Type; //导入依赖的package包/类
/**
 * transform data in group into cells(List<cell> - > {@link org.apache.hadoop.hbase.client.Result}</>)
 * @param group
 * @return
 */
public static List<Cell> groupToCells(Group group){

    List<Cell> cells = new LinkedList<>();
    if(group != null){
        cells = new LinkedList<>();
        GroupType groupType = group.getType();
        List<Type> types = groupType.getFields();
        byte [] rowKey = group.getBinary(HConstants.ROW_KEY, 0).getBytes();

        long timestamp = group.getLong(HConstants.TIME_STAMP, 0);

        for(Type t : types){
            if(! t.getName().equals(HConstants.ROW_KEY) && ! t.getName().equals(HConstants.TIME_STAMP)){
                String name = t.getName();
                String [] names = name.split(":");
                if(names.length == 2) {
                    byte[] value = group.getBinary(name, 0).getBytes();
                    Cell cell = new KeyValue(rowKey, names[0].getBytes(), names[1].getBytes(), timestamp, value);
                    cells.add(cell);
                }
            }
        }
    }
    return cells;
}
 

import parquet.schema.Type; //导入依赖的package包/类
private void writeRecordFields(GroupType schema, Schema tajoSchema,
                               Tuple tuple) {
  List<Type> fields = schema.getFields();
  // Parquet ignores Tajo NULL_TYPE columns, so the index may differ.
  int index = 0;
  for (int tajoIndex = 0; tajoIndex < tajoSchema.size(); ++tajoIndex) {
    Column column = tajoSchema.getColumn(tajoIndex);
    if (column.getDataType().getType() == TajoDataTypes.Type.NULL_TYPE) {
      continue;
    }
    Datum datum = tuple.get(tajoIndex);
    Type fieldType = fields.get(index);
    if (!tuple.isNull(tajoIndex)) {
      recordConsumer.startField(fieldType.getName(), index);
      writeValue(fieldType, column, datum);
      recordConsumer.endField(fieldType.getName(), index);
    } else if (fieldType.isRepetition(Type.Repetition.REQUIRED)) {
      throw new RuntimeException("Null-value for required field: " +
          column.getSimpleName());
    }
    ++index;
  }
}
 

import parquet.schema.Type; //导入依赖的package包/类
public String toString(String indent) {
  StringBuilder result = new StringBuilder();
  int i = 0;
  for (Type field : this.schema.getFields()) {
    String name = field.getName();
    List<Object> values = this.data[i];
    for (Object value : values) {
      result.append(indent).append(name);
      if (value == null) {
        result.append(": NULL\n");
      } else if (value instanceof Group) {
        result.append("\n").append(((ParquetGroup) value).toString(indent + "  "));
      } else {
        result.append(": ").append(value.toString()).append("\n");
      }
    }
    i++;
  }
  return result.toString();
}
 

import parquet.schema.Type; //导入依赖的package包/类
@Override
Object convertField(JsonElement value) {
  ParquetGroup r1 = new ParquetGroup((GroupType) schema());
  JsonObject inputRecord = value.getAsJsonObject();
  for (Map.Entry<String, JsonElement> entry : inputRecord.entrySet()) {
    String key = entry.getKey();
    JsonElementConverter converter = this.converters.get(key);
    Object convertedValue = converter.convert(entry.getValue());
    boolean valueIsNull = convertedValue == null;
    Type.Repetition repetition = converter.jsonSchema.optionalOrRequired();
    if (valueIsNull && repetition.equals(OPTIONAL)) {
      continue;
    }
    r1.add(key, convertedValue);
  }
  return r1;
}
 

import parquet.schema.Type; //导入依赖的package包/类
private Type buildSchema() {
  JsonArray inputSchema = this.jsonSchema.getDataTypeValues();
  List<Type> parquetTypes = new ArrayList<>();
  for (JsonElement element : inputSchema) {
    JsonObject map = (JsonObject) element;
    JsonSchema elementSchema = new JsonSchema(map);
    String columnName = elementSchema.getColumnName();
    JsonElementConverter converter = JsonElementConversionFactory.getConverter(elementSchema, false);
    Type schemaType = converter.schema();
    this.converters.put(columnName, converter);
    parquetTypes.add(schemaType);
  }
  String docName = this.jsonSchema.getColumnName();
  switch (recordType) {
    case ROOT:
      return new MessageType(docName, parquetTypes);
    case CHILD:
      return new GroupType(this.jsonSchema.optionalOrRequired(), docName, parquetTypes);
    default:
      throw new RuntimeException("Unsupported Record type");
  }
}
 

import parquet.schema.Type; //导入依赖的package包/类
public AvroUnionConverter(ParentValueContainer parent, Type parquetSchema,
                          Schema avroSchema) {
  this.parent = parent;
  GroupType parquetGroup = parquetSchema.asGroupType();
  this.memberConverters = new Converter[ parquetGroup.getFieldCount()];

  int parquetIndex = 0;
  for (int index = 0; index < avroSchema.getTypes().size(); index++) {
    Schema memberSchema = avroSchema.getTypes().get(index);
    if (!memberSchema.getType().equals(Schema.Type.NULL)) {
      Type memberType = parquetGroup.getType(parquetIndex);
      memberConverters[parquetIndex] = newConverter(memberSchema, memberType, new ParentValueContainer() {
        @Override
        void add(Object value) {
          Preconditions.checkArgument(memberValue==null, "Union is resolving to more than one type");
          memberValue = value;
        }
      });
      parquetIndex++; // Note for nulls the parquetIndex id not increased
    }
  }
}
 

import parquet.schema.Type; //导入依赖的package包/类
private void writeRecordFields(GroupType schema, Schema avroSchema,
                               Map record) {
  List<Type> fields = schema.getFields();
  List<Schema.Field> avroFields = avroSchema.getFields();
  int index = 0; // parquet ignores Avro nulls, so index may differ
  for (int avroIndex = 0; avroIndex < avroFields.size(); avroIndex++) {
    Schema.Field avroField = avroFields.get(avroIndex);
    if (avroField.schema().getType().equals(Schema.Type.NULL)) {
      continue;
    }
    Type fieldType = fields.get(index);
    Object value = record.get(fieldKeyword.invoke(avroField));
    if (value != null) {
      recordConsumer.startField(fieldType.getName(), index);
      writeValue(fieldType, avroField.schema(), value);
      recordConsumer.endField(fieldType.getName(), index);
    } else if (fieldType.isRepetition(Type.Repetition.REQUIRED)) {
      throw new RuntimeException("Null-value for required field: " + avroField.name());
    }
    index++;
  }
}
 

import parquet.schema.Type; //导入依赖的package包/类
private static SchemaDescription.Field convertField( SchemaDescription schema, Type t ) {
  boolean allowNull = t.getRepetition() != Repetition.REQUIRED;
  switch ( t.asPrimitiveType().getPrimitiveTypeName() ) {
    case BINARY:
      return schema.new Field( t.getName(), t.getName(), ValueMetaInterface.TYPE_STRING, allowNull );
    case BOOLEAN:
      return schema.new Field( t.getName(), t.getName(), ValueMetaInterface.TYPE_BOOLEAN, allowNull );
    case DOUBLE:
    case FLOAT:
      return schema.new Field( t.getName(), t.getName(), ValueMetaInterface.TYPE_NUMBER, allowNull );
    case INT32:
    case INT64:
      if ( t.getOriginalType() == OriginalType.DATE || t.getOriginalType() == OriginalType.TIME_MILLIS
          || t.getOriginalType() == OriginalType.TIMESTAMP_MILLIS ) {
        return schema.new Field( t.getName(), t.getName(), ValueMetaInterface.TYPE_DATE, allowNull );
      } else {
        return schema.new Field( t.getName(), t.getName(), ValueMetaInterface.TYPE_INTEGER, allowNull );
      }
    case INT96:
      return schema.new Field( t.getName(), t.getName(), ValueMetaInterface.TYPE_DATE, allowNull );
    default:
      throw new RuntimeException( "Undefined type: " + t );
  }
}
 

import parquet.schema.Type; //导入依赖的package包/类
@Override
public ReadContext init( InitContext context ) {
  String schemaStr = context.getConfiguration().get( ParquetConverter.PARQUET_SCHEMA_CONF_KEY );
  if ( schemaStr == null ) {
    throw new RuntimeException( "Schema not defined in the PentahoParquetSchema key" );
  }
  schema = SchemaDescription.unmarshall( schemaStr );

  converter = new ParquetConverter( schema );

  // get all fields from file's schema
  MessageType fileSchema = context.getFileSchema();
  List<Type> newFields = new ArrayList<>();
  // use only required fields
  for ( SchemaDescription.Field f : schema ) {
    Type origField = fileSchema.getFields().get( fileSchema.getFieldIndex( f.formatFieldName ) );
    newFields.add( origField );
  }
  if ( newFields.isEmpty() ) {
    throw new RuntimeException( "Fields should be declared" );
  }
  MessageType newSchema = new MessageType( fileSchema.getName(), newFields );

  return new ReadContext( newSchema, new HashMap<>() );
}
 

import parquet.schema.Type; //导入依赖的package包/类
private Converter createConverter(Type field) {
  if (field.isPrimitive()) {
    OriginalType otype = field.getOriginalType();
    if (otype != null) {
      switch (otype) {
        case MAP: break;
        case LIST: break;
        case UTF8: return new StringConverter(field.getName());
        case MAP_KEY_VALUE: break;
        case ENUM: break;
      }
    }

    return new SimplePrimitiveConverter(field.getName());
  }

  return new SimpleRecordConverter(field.asGroupType(), field.getName(), this);
}
 

import parquet.schema.Type; //导入依赖的package包/类
private Type getParquetType(HDFSColumnHandle column, MessageType messageType)
{
    if (messageType.containsField(column.getName())) {
        return messageType.getType(column.getName());
    }
    // parquet is case-insensitive, all hdfs-columns get converted to lowercase
    for (Type type : messageType.getFields()) {
        if (type.getName().equalsIgnoreCase(column.getName())) {
            return type;
        }
    }
    return null;
}