IsNull (Siddhi Query API 5.1.31 API)

java.lang.Object
- io.siddhi.query.api.expression.Expression
- - io.siddhi.query.api.expression.condition.IsNull

All Implemented Interfaces:

SiddhiElement, Serializable
```
public class IsNull
extends Expression
```
Condition Expression checking whether the event is null

See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class io.siddhi.query.api.expression.Expression
  Expression.Time

Constructor Summary

Constructors
Constructor	Description
`IsNull(Expression expression)`
`IsNull(String streamId, Integer streamIndex, boolean isInnerStream)`
`IsNull(String streamId, Integer streamIndex, boolean isInnerStream, boolean isFaultStream)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object o)`
`Expression`	`getExpression()`
`String`	`getStreamId()`
`Integer`	`getStreamIndex()`
`int`	`hashCode()`
`boolean`	`isFaultStream()`
`boolean`	`isInnerStream()`
`String`	`toString()`

Methods inherited from class io.siddhi.query.api.expression.Expression
add, and, compare, divide, function, function, getQueryContextEndIndex, getQueryContextStartIndex, in, isNull, isNullFaultStream, isNullFaultStream, isNullInnerStream, isNullInnerStream, isNullStream, isNullStream, mod, multiply, not, or, setQueryContextEndIndex, setQueryContextStartIndex, subtract, value, value, value, value, value, value, variable

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

Constructor Detail

IsNull

public IsNull(Expression expression)

IsNull

public IsNull(String streamId,
              Integer streamIndex,
              boolean isInnerStream)

IsNull

public IsNull(String streamId,
              Integer streamIndex,
              boolean isInnerStream,
              boolean isFaultStream)

Method Detail

getExpression
```
public Expression getExpression()
```

getStreamId
```
public String getStreamId()
```

getStreamIndex
```
public Integer getStreamIndex()
```

isInnerStream
```
public boolean isInnerStream()
```

isFaultStream
```
public boolean isFaultStream()
```

equals
```
public boolean equals(Object o)
```
Overrides:

equals in class Object

hashCode
```
public int hashCode()
```
Overrides:

hashCode in class Object

toString
```
public String toString()
```
Overrides:

toString in class Object