java.lang.Object
- org.apache.beam.sdk.schemas.Schema

All Implemented Interfaces:

java.io.Serializable
```
@Experimental(SCHEMAS)
public class Schema
extends java.lang.Object
implements java.io.Serializable
```
Schema describes the fields in Row.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`Schema.Builder`	Builder class for building `Schema` objects.
`static class`	`Schema.EquivalenceNullablePolicy`	Control whether nullable is included in equivalence check.
`static class`	`Schema.Field`	Field of a row.
`static class`	`Schema.FieldType`	A descriptor of a single field type.
`static interface`	`Schema.LogicalType<InputT,BaseT>`	A LogicalType allows users to define a custom schema type.
`static class`	`Schema.Options`
`static class`	`Schema.TypeName`	An enumerated list of type constructors.

Constructor Summary

Constructors
Constructor Description

Schema(java.util.List<Schema.Field> fields)

Schema(java.util.List<Schema.Field> fields, Schema.Options options)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`assignableTo(Schema other)`	Returns true if this Schema can be assigned to another Schema.
`boolean`	`assignableToIgnoreNullable(Schema other)`	Returns true if this Schema can be assigned to another Schema, ignoring nullable.
`static Schema.Builder`	`builder()`
`boolean`	`equals(@Nullable java.lang.Object o)`	Returns true if two Schemas have the same fields in the same order.
`boolean`	`equivalent(Schema other)`	Returns true if two Schemas have the same fields, but possibly in different orders.
`java.util.Map<java.lang.String,java.lang.Integer>`	`getEncodingPositions()`	Gets the encoding positions for this schema.
`Schema.Field`	`getField(int index)`	Return a field by index.
`Schema.Field`	`getField(java.lang.String name)`
`int`	`getFieldCount()`	Return the count of fields.
`java.util.List<java.lang.String>`	`getFieldNames()`	Return the list of all field names.
`java.util.List<Schema.Field>`	`getFields()`
`Schema.Options`	`getOptions()`
`@Nullable java.util.UUID`	`getUUID()`	Get this schema's UUID.
`boolean`	`hasField(java.lang.String fieldName)`	Returns true if `fieldName` exists in the schema, false otherwise.
`int`	`hashCode()`
`int`	`indexOf(java.lang.String fieldName)`	Find the index of a given field.
`boolean`	`isEncodingPositionsOverridden()`	Returns whether encoding positions have been explicitly overridden.
`java.lang.String`	`nameOf(int fieldIndex)`	Return the name of field by index.
`static Schema`	`of(Schema.Field... fields)`
`void`	`setEncodingPositions(java.util.Map<java.lang.String,java.lang.Integer> encodingPositions)`	Sets the encoding positions for this schema.
`void`	`setUUID(java.util.UUID uuid)`	Set this schema's UUID.
`Schema`	`sorted()`	Returns an identical Schema with sorted fields.
`static java.util.stream.Collector<Schema.Field,java.util.List<Schema.Field>,Schema>`	`toSchema()`	Collects a stream of `Schema.Field`s into a `Schema`.
`java.lang.String`	`toString()`
`boolean`	`typesEqual(Schema other)`	Returns true if two schemas are equal ignoring field names and descriptions.
`Schema`	`withOptions(Schema.Options options)`	Returns a copy of the Schema with the options set.
`Schema`	`withOptions(Schema.Options.Builder optionsBuilder)`	Returns a copy of the Schema with the options set.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Schema

public Schema(java.util.List<Schema.Field> fields)

Schema

public Schema(java.util.List<Schema.Field> fields,
              Schema.Options options)

Method Detail
- builder
```
public static Schema.Builder builder()
```
- of
```
public static Schema of(Schema.Field... fields)
```
- sorted
```
public Schema sorted()
```
  Returns an identical Schema with sorted fields.
- withOptions
```
public Schema withOptions(Schema.Options options)
```
  Returns a copy of the Schema with the options set.
- withOptions
```
public Schema withOptions(Schema.Options.Builder optionsBuilder)
```
  Returns a copy of the Schema with the options set.
- setUUID
```
public void setUUID(java.util.UUID uuid)
```
  Set this schema's UUID. All schemas with the same UUID must be guaranteed to be identical.
- getEncodingPositions
```
public java.util.Map<java.lang.String,java.lang.Integer> getEncodingPositions()
```
  Gets the encoding positions for this schema.
- isEncodingPositionsOverridden
```
public boolean isEncodingPositionsOverridden()
```
  Returns whether encoding positions have been explicitly overridden.
- setEncodingPositions
```
public void setEncodingPositions(java.util.Map<java.lang.String,java.lang.Integer> encodingPositions)
```
  Sets the encoding positions for this schema.
- getUUID
```
public @Nullable java.util.UUID getUUID()
```
  Get this schema's UUID.
- equals
```
public boolean equals(@Nullable java.lang.Object o)
```
  Returns true if two Schemas have the same fields in the same order.
  
  Overrides:
  
  equals in class java.lang.Object
- typesEqual
```
public boolean typesEqual(Schema other)
```
  Returns true if two schemas are equal ignoring field names and descriptions.
- equivalent
```
public boolean equivalent(Schema other)
```
  Returns true if two Schemas have the same fields, but possibly in different orders.
- assignableTo
```
public boolean assignableTo(Schema other)
```
  Returns true if this Schema can be assigned to another Schema. *
- assignableToIgnoreNullable
```
public boolean assignableToIgnoreNullable(Schema other)
```
  Returns true if this Schema can be assigned to another Schema, ignoring nullable. *
- toString
```
public java.lang.String toString()
```
  Overrides:
  
  toString in class java.lang.Object
- hashCode
```
public int hashCode()
```
  Overrides:
  
  hashCode in class java.lang.Object
- getFields
```
public java.util.List<Schema.Field> getFields()
```
- toSchema
```
public static java.util.stream.Collector<Schema.Field,java.util.List<Schema.Field>,Schema> toSchema()
```
  Collects a stream of Schema.Fields into a Schema.
- getFieldNames
```
public java.util.List<java.lang.String> getFieldNames()
```
  Return the list of all field names.
- getField
```
public Schema.Field getField(int index)
```
  Return a field by index.
- getField
```
public Schema.Field getField(java.lang.String name)
```
- indexOf
```
public int indexOf(java.lang.String fieldName)
```
  Find the index of a given field.
- hasField
```
public boolean hasField(java.lang.String fieldName)
```
  Returns true if fieldName exists in the schema, false otherwise.
- nameOf
```
public java.lang.String nameOf(int fieldIndex)
```
  Return the name of field by index.
- getFieldCount
```
public int getFieldCount()
```
  Return the count of fields.
- getOptions
```
public Schema.Options getOptions()
```

Constructor	Description
`Schema(java.util.List<Schema.Field> fields)`
`Schema(java.util.List<Schema.Field> fields, Schema.Options options)`

Class Schema

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Schema

Schema

Method Detail

builder

of

sorted

withOptions

withOptions

setUUID

getEncodingPositions

isEncodingPositionsOverridden

setEncodingPositions

getUUID

equals

typesEqual

equivalent

assignableTo

assignableToIgnoreNullable

toString

hashCode

getFields

toSchema

getFieldNames

getField

getField

indexOf

hasField

nameOf

getFieldCount

getOptions