Package io.higson.runtime.core

Class EmptyParamValue

java.lang.Object

io.higson.runtime.core.EmptyParamValue

All Implemented Interfaces:

ParamValue, Iterable<MultiValue>

public class EmptyParamValue
extends Object
implements ParamValue

This class represents empty parameter's value. It is mostly used, when engine HigsonEngine is defined in a way that, it should never return null for missing parameter's value. The usage of this class depends on setup done through HigsonEngineFactory.setValueNeverNull(boolean) set to true.

Most values will be either null, 0, true.

Author:

przemek hertel

See Also:

• HigsonEngine.get(String, ParamContext)
• MultiValue

Constructor Summary

Constructors

Constructor	Description
EmptyParamValue()

Method Summary

Modifier and Type	Method	Description
<T> T	get()	Always returns null.
<T> T	get(int colNo)	Always returns null.
<T> T	get(int rowNo, int colNo)	Always returns null.
<T> T	get(int rowNo, int colNo, Class<T> clazz)	Always returns null.
<T> T	get(int colNo, Class<T> clazz)	Always returns null.
<T> T	get(int rowNo, String name)	Always returns null.
<T> T	get(int rowNo, String name, Class<T> clazz)	Always returns null.
<T> T	get(Class<T> clazz)	Always returns null.
<T> T	get(String name)	Always returns null.
<T> T	get(String name, Class<T> clazz)	Always returns null.
BigDecimal	getBigDecimal()	Always returns null.
BigDecimal	getBigDecimal(String name)	Always returns null.
Boolean	getBoolean()	Always returns null.
Boolean	getBoolean(String name)	Always returns null.
Date	getDate()	Always returns null.
Date	getDate(String name)	Always returns null.
Date	getDatetime()	Always returns null.
Date	getDatetime(String name)	Always returns null.
<T extends Enum<T>> T	getEnum(Class<T> enumClass)	Always returns null.
<T extends Enum<T>> T	getEnum(String name, Class<T> enumClass)	Always returns null.
<T extends Enum<T>> Set<T>	getEnumSet(Class<T> enumClass)
<T extends Enum<T>> Set<T>	getEnumSet(String name, Class<T> enumClass)
ValueHolder	getHolder()	Always returns null.
ValueHolder	getHolder(int colNo)	Always returns null.
ValueHolder	getHolder(int rowNo, int colNo)	Always returns null.
ValueHolder	getHolder(int rowNo, String name)	Always returns null.
ValueHolder	getHolder(String name)	Always returns null.
Integer	getInteger()	Always returns null.
Integer	getInteger(String name)	Always returns null.
LocalDate	getLocalDate()	Always returns null.
LocalDate	getLocalDate(String name)	Always returns null.
LocalDateTime	getLocalDatetime()	Always returns null.
LocalDateTime	getLocalDatetime(String name)	Always returns null.
Long	getLong()	Always returns null.
Long	getLong(String name)	Always returns null.
Object	getMetadata()	Always returns null.
String	getString()	Always returns null.
String	getString(String name)	Always returns null.
boolean	isBlank()	Always returns true.
boolean	isEmpty()	Always returns true.
Iterator<MultiValue>	iterator()	Always returns iterator of empty list.
MultiValue	row()	Always returns null.
MultiValue	row(int rowNo)	Always returns null.
List<MultiValue>	rows()	Returns empty list of rows.
int	size()	Always return 0.
Stream<MultiValue>	stream()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

EmptyParamValue

public EmptyParamValue()

Method Details

row

public MultiValue row(int rowNo)

Always returns null.

Specified by:

row in interface ParamValue

Parameters:

rowNo - row index

Returns:

null

row

public MultiValue row()

Always returns null.

Specified by:

row in interface ParamValue

Returns:

null

rows

public List<MultiValue> rows()

Returns empty list of rows.

Specified by:

rows in interface ParamValue

Returns:

empty list

getHolder

public ValueHolder getHolder(int rowNo,
 int colNo)

Always returns null.

Specified by:

getHolder in interface ParamValue

Parameters:

rowNo - row index

colNo - column index

Returns:

null

get

public <T> T get(int rowNo,
 int colNo)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

rowNo - row index

colNo - column index

Returns:

null

get

public <T> T get(int rowNo,
 int colNo,
 Class<T> clazz)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

rowNo - row index

colNo - column index

clazz - class of return object, but it doesn't matter since it returns null

Returns:

null

getHolder

public ValueHolder getHolder(int rowNo,
 String name)

Always returns null.

Specified by:

getHolder in interface ParamValue

Parameters:

rowNo - row index

name - level name as column indicator

Returns:

null

get

public <T> T get(int rowNo,
 String name)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

rowNo - row index

name - level name as column indicator

Returns:

null

get

public <T> T get(int rowNo,
 String name,
 Class<T> clazz)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

rowNo - row index

name - level name as column indicator

clazz - class of return object, but it doesn't matter since it returns null

Returns:

null

getHolder

public ValueHolder getHolder(int colNo)

Always returns null.

Specified by:

getHolder in interface ParamValue

Parameters:

colNo - column index

Returns:

null

get

public <T> T get(int colNo)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

colNo - column index

Returns:

null

get

public <T> T get(int colNo,
 Class<T> clazz)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

colNo - column index

clazz - class of return object, but it doesn't matter since it returns null

Returns:

null

getHolder

public ValueHolder getHolder(String name)

Always returns null.

Specified by:

getHolder in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

get

public <T> T get(String name)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

name - level name as column indicator

Returns:

null

get

public <T> T get(String name,
 Class<T> clazz)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

name - level name as column indicator

clazz - class of return object, but it doesn't matter since it returns null

Returns:

null

getString

public String getString(String name)

Always returns null.

Specified by:

getString in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getBigDecimal

public BigDecimal getBigDecimal(String name)

Always returns null.

Specified by:

getBigDecimal in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getDate

public Date getDate(String name)

Always returns null.

Specified by:

getDate in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getDatetime

public Date getDatetime(String name)

Always returns null.

Specified by:

getDatetime in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getLocalDate

public LocalDate getLocalDate(String name)

Always returns null.

Specified by:

getLocalDate in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getLocalDatetime

public LocalDateTime getLocalDatetime(String name)

Always returns null.

Specified by:

getLocalDatetime in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getInteger

public Integer getInteger(String name)

Always returns null.

Specified by:

getInteger in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getLong

public Long getLong(String name)

Always returns null.

Specified by:

getLong in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getBoolean

public Boolean getBoolean(String name)

Always returns null.

Specified by:

getBoolean in interface ParamValue

Parameters:

name - level name as column indicator

Returns:

null

getEnum

public <T extends Enum<T>> T getEnum(String name,
 Class<T> enumClass)

Always returns null.

Specified by:

getEnum in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

name - level name as column indicator

enumClass - enum of return object, but it doesn't matter since it returns null

Returns:

null

getEnumSet

public <T extends Enum<T>> Set<T> getEnumSet(String name,
 Class<T> enumClass)

Specified by:

getEnumSet in interface ParamValue

Type Parameters:

T - type of return value

Parameters:

name - level name as column indicator

enumClass - enum of return object

Returns:

empty set

getHolder

public ValueHolder getHolder()

Always returns null.

Specified by:

getHolder in interface ParamValue

Returns:

null

get

public <T> T get()

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Returns:

null

get

public <T> T get(Class<T> clazz)

Always returns null.

Specified by:

get in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

clazz - class of return object, but it doesn't matter since it returns null

Returns:

null

getString

public String getString()

Always returns null.

Specified by:

getString in interface ParamValue

Returns:

null

getBigDecimal

public BigDecimal getBigDecimal()

Always returns null.

Specified by:

getBigDecimal in interface ParamValue

Returns:

null

getDate

public Date getDate()

Always returns null.

Specified by:

getDate in interface ParamValue

Returns:

null

getDatetime

public Date getDatetime()

Always returns null.

Specified by:

getDatetime in interface ParamValue

Returns:

null

getLocalDate

public LocalDate getLocalDate()

Always returns null.

Specified by:

getLocalDate in interface ParamValue

Returns:

null

getLocalDatetime

public LocalDateTime getLocalDatetime()

Always returns null.

Specified by:

getLocalDatetime in interface ParamValue

Returns:

null

getInteger

public Integer getInteger()

Always returns null.

Specified by:

getInteger in interface ParamValue

Returns:

null

getLong

public Long getLong()

Always returns null.

Specified by:

getLong in interface ParamValue

Returns:

null

getEnum

public <T extends Enum<T>> T getEnum(Class<T> enumClass)

Always returns null.

Specified by:

getEnum in interface ParamValue

Type Parameters:

T - type of return value, but it doesn't matter since it returns null

Parameters:

enumClass - enum of return object, but it doesn't matter since it returns null

Returns:

null

getEnumSet

public <T extends Enum<T>> Set<T> getEnumSet(Class<T> enumClass)

Specified by:

getEnumSet in interface ParamValue

Type Parameters:

T - type

Parameters:

enumClass - enum of return object

Returns:

empty set

size

public int size()

Always return 0.

Specified by:

size in interface ParamValue

Returns:

size of 0

getMetadata

public Object getMetadata()

Always returns null.

Specified by:

getMetadata in interface ParamValue

Returns:

null

getBoolean

public Boolean getBoolean()

Always returns null.

Specified by:

getBoolean in interface ParamValue

Returns:

null

isEmpty

public boolean isEmpty()

Always returns true.

Specified by:

isEmpty in interface ParamValue

Returns:

true

isBlank

public boolean isBlank()

Always returns true.

Specified by:

isBlank in interface ParamValue

Returns:

true

stream

public Stream<MultiValue> stream()

Specified by:

stream in interface ParamValue

Returns:

always returns empty Stream

iterator

public Iterator<MultiValue> iterator()

Always returns iterator of empty list.

Specified by:

iterator in interface Iterable<MultiValue>

Returns:

instance of Iterator<MultiValue>

See Also:

• MultiValue