com.pervasive.datarush.tokens.record

Class AbstractRecordValued<F extends ScalarValued>

java.lang.Object

com.pervasive.datarush.tokens.record.AbstractRecordValued<F>

Type Parameters:

F - the type of ScalarValued objects contained in the record

All Implemented Interfaces:

RecordValued, TokenValued, RecordTyped, TokenTyped

Direct Known Subclasses:

CompositeValue, RecordRegister, RecordToken

public abstract class AbstractRecordValued<F extends ScalarValued>
extends Object
implements RecordValued

For internal use only. A base implementation of a RecordValued object, providing implementations of all required methods.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractRecordValued(F[] fieldValues, ModificationCountProvider modificationCountProvider) Constructs a value using the given elements as the field elements.
protected	AbstractRecordValued(RecordTokenType type, F[] fieldValues, boolean validateType, ModificationCountProvider modificationCountProvider) Constructs a value using the given elements as the field elements, using the specified type.
protected	AbstractRecordValued(RecordTokenType type, F[] fieldValues, ModificationCountProvider modificationCountProvider) Constructs a value using the given elements as the field elements, using the specified type.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	containsNull() Determines if any field in the record is null valued.
protected TokenConverter	getConverter() Gets a memoized converter for this object.
F	getField(int index) Get the field at the given index within the list of fields.
F	getField(String fieldName) Gets the value of the field with the given name.
F[]	getFields() Gets the values of all fields in the record
RecordTokenType	getType() Gets the data type of the token.
boolean	isNull() Indicates whether the token is null valued.
ScalarValuedIterator	newFieldIterator(FieldIteratorProperties properties) Create a new iterator for visiting the fields in this RecordValued object.
ScalarValuedIterator	newFieldIterator(ScalarTokenType type) Create a new iterator for visiting the fields in this RecordValued object.
ScalarValuedIterator	newFieldIterator(ScalarTokenType type, String[] selectedFieldNames) Create a new iterator for visiting the fields in this RecordValued object.
int	size() Gets the number of fields in the record schema.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AbstractRecordValued

protected AbstractRecordValued(F[] fieldValues,
                    ModificationCountProvider modificationCountProvider)

Constructs a value using the given elements as the field elements. A type will be generated from the element types using default field names.

Parameters:

fieldValues - the elements to use as the fields

modificationCountProvider - modification count provider. required for notification of underlying changes.

AbstractRecordValued

protected AbstractRecordValued(RecordTokenType type,
                    F[] fieldValues,
                    ModificationCountProvider modificationCountProvider)

Constructs a value using the given elements as the field elements, using the specified type. The field types will be cross-validated against the elements.

Parameters:

type - the record schema to use for the value

fieldValues - the elements to use as the fields

modificationCountProvider - modification count provider. required for notification of underlying changes.

Throws:

DRException - if the provided field types disagree with the types of the elements

AbstractRecordValued

protected AbstractRecordValued(RecordTokenType type,
                    F[] fieldValues,
                    boolean validateType,
                    ModificationCountProvider modificationCountProvider)

Constructs a value using the given elements as the field elements, using the specified type.

Parameters:

type - the record schema to use for the value

fieldValues - the elements to use as the fields

validateType - indicates whether to cross-validate the type with the element types

modificationCountProvider - modification count provider. required for notification of underlying changes.

Throws:

DRException - if type validation is requested and the provided field types disagree with the types of the elements

Method Detail

getType

public final RecordTokenType getType()

Description copied from interface: TokenValued

Gets the data type of the token. This type will dictate the valid values that can be contained.

Specified by:

getType in interface RecordValued

Specified by:

getType in interface TokenValued

Specified by:

getType in interface RecordTyped

Specified by:

getType in interface TokenTyped

Returns:

the token type.

size

public final int size()

Description copied from interface: RecordValued

Gets the number of fields in the record schema.

Specified by:

size in interface RecordValued

Returns:

the number of fields

isNull

public final boolean isNull()

Description copied from interface: TokenValued

Indicates whether the token is null valued. Tokens support null values analogous to SQL. Before accessing the value of the container, it is usually best to ensure it is not null valued using this method.

Specified by:

isNull in interface TokenValued

Returns:

true if the token is null valued, false otherwise

containsNull

public final boolean containsNull()

Description copied from interface: RecordValued

Determines if any field in the record is null valued.

Specified by:

containsNull in interface RecordValued

Returns:

true if at least one field is null valued, false if none are

getField

public final F getField(int index)

Description copied from interface: RecordValued

Get the field at the given index within the list of fields.

Specified by:

getField in interface RecordValued

Parameters:

index - zero-based index into the field list

Returns:

the field's value

getField

public final F getField(String fieldName)

Description copied from interface: RecordValued

Gets the value of the field with the given name.

Specified by:

getField in interface RecordValued

Parameters:

fieldName - the field name

Returns:

the field's value

getFields

public final F[] getFields()

Description copied from interface: RecordValued

Gets the values of all fields in the record

Specified by:

getFields in interface RecordValued

Returns:

an array containing the values of the record's fields

getConverter

protected final TokenConverter getConverter()

Gets a memoized converter for this object. Any conversion operations should use the returned converter to reduce the overhead of allocating converters each time one is required.

Returns:

a converter usable with the value

toString

public String toString()

Overrides:

toString in class Object

newFieldIterator

public final ScalarValuedIterator newFieldIterator(ScalarTokenType type)

Description copied from interface: RecordValued

Create a new iterator for visiting the fields in this RecordValued object. Visitation order will be sorted by the field's index.

Specified by:

newFieldIterator in interface RecordValued

Parameters:

type - the type of fields over which to iterate

Returns:

an iterator over fields of the specified type

newFieldIterator

public final ScalarValuedIterator newFieldIterator(ScalarTokenType type,
                                    String[] selectedFieldNames)

Description copied from interface: RecordValued

Create a new iterator for visiting the fields in this RecordValued object. Visitation order will be sorted by the field's index.

Specified by:

newFieldIterator in interface RecordValued

Parameters:

type - the type of fields over which to iterate

selectedFieldNames - the fields over which to iterate

Returns:

an iterator over the specified fields

newFieldIterator

public final ScalarValuedIterator newFieldIterator(FieldIteratorProperties properties)

Description copied from interface: RecordValued

Create a new iterator for visiting the fields in this RecordValued object. Visitation order will optionally be sorted by the field's index, depending on the value of FieldIteratorProperties.isSorted().

Specified by:

newFieldIterator in interface RecordValued

Parameters:

properties - properties for the iterator

Returns:

an iterator over the fields