ADAM_2.12: Core 0.33.0 API < Back
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org.bdgenomics.adam.projections

# Projection 

###

#### object Projection

Avro utility object to create a projection of a Schema.

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4.  def apply(exclude: Boolean, includedFields: FieldValue*): Schema

   Creates a projection that either includes or excludes a variable number of fields.

   Creates a projection that either includes or excludes a variable number of fields.

   exclude

     If false, includes the provided fields in the projection. If true, the provided fields will be excluded, and all other fields from the record will be included in the projection.

   includedFields

     If exclude is false, fields to include in the projection. Else, fields to exclude from the projection.

   returns

     Returns the specified schema with the fields predicated out.

   Note

     The schema is inferred from the provided FieldValues. Undefined behavior may result if you provide FieldValues from multiple different FieldEnumerations.

     ,

     Unlike the other apply methods, this method will allow you to project down to zero fields, which may cause an exception when loading from disk.

5.  def apply(includedFields: FieldValue*): Schema

   Creates a projection that includes a variable number of fields.

   Creates a projection that includes a variable number of fields.

   includedFields

     Fields to include in the projection

   returns

     Returns the specified schema with the fields predicated out.

   Exceptions thrown

     `IllegalArgumentException` if there are no fields included in the projection.

   Note

     The schema is inferred from the provided FieldValues. Undefined behavior may result if you provide FieldValues from multiple different FieldEnumerations.

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