LogicExpression (ActiveMQ Artemis Selector Implementation 2.33.0 API)

java.lang.Object
- org.apache.activemq.artemis.selector.filter.LogicExpression

All Implemented Interfaces:

BooleanExpression, Expression
```
public abstract class LogicExpression
extends Object
implements BooleanExpression
```
A sequence of expressions, to be combined with OR or AND conjunctions.

Field Summary

Fields
Modifier and Type Field Description

protected List<BooleanExpression> expressions

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`addExpression(BooleanExpression expression)`
`static BooleanExpression`	`createAND(BooleanExpression lvalue, BooleanExpression rvalue)`
`static BooleanExpression`	`createOR(BooleanExpression lvalue, BooleanExpression rvalue)`
`abstract Object`	`evaluate(Filterable message)`
`abstract String`	`getExpressionSymbol()`	Returns the symbol that represents this binary expression.
`BooleanExpression`	`getLeft()`
`BooleanExpression`	`getRight()`
`abstract boolean`	`matches(Filterable message)`
`String`	`toString()`

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

Field Detail

expressions

protected final List<BooleanExpression> expressions

Method Detail

addExpression

protected void addExpression(BooleanExpression expression)

getLeft
```
public BooleanExpression getLeft()
```

getRight
```
public BooleanExpression getRight()
```

getExpressionSymbol
```
public abstract String getExpressionSymbol()
```
Returns the symbol that represents this binary expression. For example, addition is represented by "+"

Returns:

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

toString in class Object

createOR

public static BooleanExpression createOR(BooleanExpression lvalue,
                                         BooleanExpression rvalue)

createAND

public static BooleanExpression createAND(BooleanExpression lvalue,
                                          BooleanExpression rvalue)

evaluate

public abstract Object evaluate(Filterable message)
                         throws FilterException

Specified by:: evaluate in interface Expression
Returns:: the value of this expression
Throws:: FilterException

matches
```
public abstract boolean matches(Filterable message)
                         throws FilterException
```
Specified by:

matches in interface BooleanExpression

Returns:

true if the expression evaluates to Boolean.TRUE.

Throws:

FilterException