org.apache.parquet.schema

Class GroupType

java.lang.Object

org.apache.parquet.schema.Type

org.apache.parquet.schema.GroupType

Direct Known Subclasses:

MessageType

public class GroupType
extends Type

Represents a group type: a list of fields

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.parquet.schema.Type

Type.ID, Type.Repetition

Constructor Summary

Constructors

Constructor and Description
GroupType(Type.Repetition repetition, String name, List<Type> fields)
GroupType(Type.Repetition repetition, String name, OriginalType originalType, List<Type> fields) Deprecated.
GroupType(Type.Repetition repetition, String name, OriginalType originalType, Type... fields) Deprecated.
GroupType(Type.Repetition repetition, String name, Type... fields)

Method Summary

Modifier and Type	Method and Description
void	accept(TypeVisitor visitor) Visits this type with the given visitor
boolean	containsField(String name)
protected boolean	containsPath(String[] path, int depth)
protected <T> List<T>	convertChildren(List<GroupType> path, TypeConverter<T> converter)
protected boolean	equals(Type otherType)
int	getFieldCount()
int	getFieldIndex(String name)
String	getFieldName(int index) returns the name of the corresponding field
List<Type>	getFields()
protected int	getMaxDefinitionLevel(String[] path, int depth)
protected int	getMaxRepetitionLevel(String[] path, int depth)
protected List<String[]>	getPaths(int depth)
Type	getType(int index)
Type	getType(String fieldName)
protected Type	getType(String[] path, int depth)
int	hashCode()
boolean	isPrimitive()
protected boolean	typeEquals(Type other) Deprecated.
protected int	typeHashCode() Deprecated.
protected Type	union(Type toMerge)
protected Type	union(Type toMerge, boolean strict)
GroupType	withId(int id)
GroupType	withNewFields(List<Type> newFields)
GroupType	withNewFields(Type... newFields)
void	writeToStringBuilder(StringBuilder sb, String indent) Writes a string representation to the provided StringBuilder

Methods inherited from class org.apache.parquet.schema.Type

asGroupType, asPrimitiveType, eqOrBothNull, equals, getId, getLogicalTypeAnnotation, getName, getOriginalType, getRepetition, isRepetition, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

GroupType

public GroupType(Type.Repetition repetition,
                 String name,
                 List<Type> fields)

Parameters:

repetition - OPTIONAL, REPEATED, REQUIRED

name - the name of the field

fields - the contained fields

GroupType

public GroupType(Type.Repetition repetition,
                 String name,
                 Type... fields)

Parameters:

repetition - OPTIONAL, REPEATED, REQUIRED

name - the name of the field

fields - the contained fields

GroupType

@Deprecated
public GroupType(Type.Repetition repetition,
                             String name,
                             OriginalType originalType,
                             Type... fields)

Deprecated.

Parameters:

repetition - OPTIONAL, REPEATED, REQUIRED

name - the name of the field

originalType - (optional) the original type to help with cross schema conversion (LIST, MAP, ...)

fields - the contained fields

GroupType

@Deprecated
public GroupType(Type.Repetition repetition,
                             String name,
                             OriginalType originalType,
                             List<Type> fields)

Deprecated.

Parameters:

repetition - OPTIONAL, REPEATED, REQUIRED

name - the name of the field

originalType - (optional) the original type to help with cross schema conversion (LIST, MAP, ...)

fields - the contained fields

Method Detail

withId

public GroupType withId(int id)

Specified by:

withId in class Type

Parameters:

id - the field id

Returns:

a new GroupType with the same fields and a new id

withNewFields

public GroupType withNewFields(List<Type> newFields)

Parameters:

newFields - a list of types to use as fields in a copy of this group

Returns:

a group with the same attributes and new fields.

withNewFields

public GroupType withNewFields(Type... newFields)

Parameters:

newFields - an array of types to use as fields in a copy of this group

Returns:

a group with the same attributes and new fields.

getFieldName

public String getFieldName(int index)

returns the name of the corresponding field

Parameters:

index - the index of the desired field in this type

Returns:

the name of the field at this index

containsField

public boolean containsField(String name)

Parameters:

name - the requested name

Returns:

whether this type contains a field with that name

getFieldIndex

public int getFieldIndex(String name)

Parameters:

name - string name of a field

Returns:

the index of the field with that name

getFields

public List<Type> getFields()

Returns:

the fields contained in this type

getFieldCount

public int getFieldCount()

Returns:

the number of fields in this type

isPrimitive

public boolean isPrimitive()

Specified by:

isPrimitive in class Type

Returns:

false

getType

public Type getType(String fieldName)

Parameters:

fieldName - string name of a field

Returns:

the type of this field by name

getType

public Type getType(int index)

Parameters:

index - integer index of a field

Returns:

the type of this field by index

writeToStringBuilder

public void writeToStringBuilder(StringBuilder sb,
                                 String indent)

Writes a string representation to the provided StringBuilder

Specified by:

writeToStringBuilder in class Type

Parameters:

sb - the StringBuilder to write itself to

indent - indentation level

accept

public void accept(TypeVisitor visitor)

Visits this type with the given visitor

Specified by:

accept in class Type

Parameters:

visitor - the visitor to visit this type

typeHashCode

@Deprecated
protected int typeHashCode()

Deprecated.

Specified by:

typeHashCode in class Type

typeEquals

@Deprecated
protected boolean typeEquals(Type other)

Deprecated.

Specified by:

typeEquals in class Type

hashCode

public int hashCode()

Overrides:

hashCode in class Type

equals

protected boolean equals(Type otherType)

Overrides:

equals in class Type

getMaxRepetitionLevel

protected int getMaxRepetitionLevel(String[] path,
                                    int depth)

Specified by:

getMaxRepetitionLevel in class Type

getMaxDefinitionLevel

protected int getMaxDefinitionLevel(String[] path,
                                    int depth)

Specified by:

getMaxDefinitionLevel in class Type

getType

protected Type getType(String[] path,
                       int depth)

Specified by:

getType in class Type

containsPath

protected boolean containsPath(String[] path,
                               int depth)

Specified by:

containsPath in class Type

getPaths

protected List<String[]> getPaths(int depth)

Specified by:

getPaths in class Type

convertChildren

protected <T> List<T> convertChildren(List<GroupType> path,
                                      TypeConverter<T> converter)

union

protected Type union(Type toMerge)

Specified by:

union in class Type

Parameters:

toMerge - the type to merge into this one

Returns:

the union result of merging toMerge into this

union

protected Type union(Type toMerge,
                     boolean strict)

Specified by:

union in class Type

Parameters:

toMerge - the type to merge into this one

strict - should schema primitive types match

Returns:

the union result of merging toMerge into this