Package org.rumbledb.items

Class NullItem

java.lang.Object

org.rumbledb.items.NullItem

All Implemented Interfaces:

com.esotericsoftware.kryo.KryoSerializable, Serializable, Item

public class NullItem
extends Object
implements Item

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
NullItem()

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object otherItem)	Tests for logical equality.
ItemType	getDynamicType()	Returns the dynamic type of the item (only for error message purposes).
boolean	getEffectiveBooleanValue()	Returns the effective boolean value of the item, if atomic.
String	getSparkSQLValue()	Returns the SparkSQL value of the item for use in a query.
String	getSparkSQLValue(ItemType itemType)	Returns the SparkSQL value of the item for use in a query.
String	getStringValue()	Returns the string value of the item, if it is an atomic item.
Object	getVariantValue()	Returns the Object containing the converted value of the item for a DataFrame.
int	hashCode()	Computes a hash code.
boolean	isAtomic()	Tests whether the item is an atomic item.
boolean	isNull()	Tests whether the item is the null item.
void	read(com.esotericsoftware.kryo.Kryo kryo, com.esotericsoftware.kryo.io.Input input)
void	write(com.esotericsoftware.kryo.Kryo kryo, com.esotericsoftware.kryo.io.Output output)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.rumbledb.api.Item

addParentToDescendants, append, atomizedValue, attributes, castToDecimalValue, castToDoubleValue, castToFloatValue, castToIntegerValue, castToIntValue, children, generateNativeQuery, getBinaryValue, getBodyIterator, getBooleanValue, getContent, getDateTimeValue, getDay, getDecimalValue, getDFVariablesInClosure, getDoubleValue, getDurationValue, getEpochMillis, getEstimator, getFloatValue, getHour, getIdentifier, getIntegerValue, getIntValue, getItemAt, getItemByKey, getItems, getKeys, getLocalVariablesInClosure, getMinute, getModuleDynamicContext, getMonth, getMutabilityLevel, getNanosecond, getOffset, getParameterNames, getPathIn, getPeriodValue, getRDDVariablesInClosure, getSecond, getSignature, getSize, getSparkSQLType, getTableLocation, getTextValue, getTimeValue, getTopLevelID, getTopLevelOrder, getTransformer, getValues, getXmlDocumentPosition, getYear, hasDateTime, hasTimeZone, isAnyURI, isArray, isAttributeNode, isBase64Binary, isBinary, isBoolean, isDate, isDateTime, isDayTimeDuration, isDecimal, isDocumentNode, isDouble, isDuration, isElementNode, isEstimator, isFloat, isFunction, isGDay, isGMonth, isGMonthDay, isGYear, isGYearMonth, isHexBinary, isInt, isInteger, isNaN, isNode, isNumeric, isObject, isPeriod, isString, isTextNode, isTime, isTransformer, isYearMonthDuration, nodeName, parent, physicalEquals, putItem, putItemAt, putItemByKey, putItemsAt, putLazyItemByKey, removeItemAt, removeItemByKey, serialize, serializeAsJSON, setMutabilityLevel, setParent, setPathIn, setTableLocation, setTopLevelID, setTopLevelOrder, setXmlDocumentPosition

Constructor Details

NullItem

public NullItem()

Method Details

equals

public boolean equals(Object otherItem)

Description copied from interface: Item

Tests for logical equality. The semantics are that of the eq operator.

Specified by:

equals in interface Item

Overrides:

equals in class Object

Parameters:

otherItem - another item.

Returns:

true it is equal to other, false otherwise.

isNull

public boolean isNull()

Description copied from interface: Item

Tests whether the item is the null item.

Specified by:

isNull in interface Item

Returns:

true if it is the null item, false otherwise.

getVariantValue

public Object getVariantValue()

Description copied from interface: Item

Returns the Object containing the converted value of the item for a DataFrame. For use to build Variant columns.

Specified by:

getVariantValue in interface Item

Returns:

Object representing the converted value of the item.

getEffectiveBooleanValue

public boolean getEffectiveBooleanValue()

Description copied from interface: Item

Returns the effective boolean value of the item, if atomic.

Specified by:

getEffectiveBooleanValue in interface Item

Returns:

the effective boolean value.

write

public void write(com.esotericsoftware.kryo.Kryo kryo,
 com.esotericsoftware.kryo.io.Output output)

Specified by:

write in interface com.esotericsoftware.kryo.KryoSerializable

read

public void read(com.esotericsoftware.kryo.Kryo kryo,
 com.esotericsoftware.kryo.io.Input input)

Specified by:

read in interface com.esotericsoftware.kryo.KryoSerializable

hashCode

public int hashCode()

Description copied from interface: Item

Computes a hash code.

Specified by:

hashCode in interface Item

Overrides:

hashCode in class Object

Returns:

a hash code as an int.

getDynamicType

public ItemType getDynamicType()

Description copied from interface: Item

Returns the dynamic type of the item (only for error message purposes).

Specified by:

getDynamicType in interface Item

Returns:

the dynamic type as an item type.

isAtomic

public boolean isAtomic()

Description copied from interface: Item

Tests whether the item is an atomic item.

Specified by:

isAtomic in interface Item

Returns:

true if it is an atomic item, false otherwise.

getStringValue

public String getStringValue()

Description copied from interface: Item

Returns the string value of the item, if it is an atomic item.

Specified by:

getStringValue in interface Item

Returns:

the string value.

getSparkSQLValue

public String getSparkSQLValue()

Description copied from interface: Item

Returns the SparkSQL value of the item for use in a query.

Specified by:

getSparkSQLValue in interface Item

Returns:

String representing the SparkSQL value of the item.

getSparkSQLValue

public String getSparkSQLValue(ItemType itemType)

Description copied from interface: Item

Returns the SparkSQL value of the item for use in a query.

Specified by:

getSparkSQLValue in interface Item

Returns:

String representing the SparkSQL value of the item.