Package com.espertech.esper.common.client.soda

Class LikeExpression

java.lang.Object

com.espertech.esper.common.client.soda.ExpressionBase

com.espertech.esper.common.client.soda.LikeExpression

All Implemented Interfaces:

Expression, Serializable

public class LikeExpression
extends ExpressionBase

SQL-Like expression for matching '%' and '_' wildcard strings following SQL standards.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
LikeExpression()	Ctor - for use to create an expression tree, without child expression.
LikeExpression(boolean isNot)	Ctor - for use to create an expression tree, without child expression.
LikeExpression(Expression left, Expression right)	Ctor.
LikeExpression(Expression left, Expression right, boolean isNot)	Ctor.
LikeExpression(Expression left, Expression right, Expression escape)	Ctor.
LikeExpression(Expression left, Expression right, Expression escape, boolean isNot)	Ctor.

Method Summary

Modifier and Type	Method	Description
boolean	getNot()	Returns true if this is a "not like", or false if just a like
ExpressionPrecedenceEnum	getPrecedence()	Returns precedence.
boolean	isNot()	Returns true if this is a "not like", or false if just a like
void	setNot(boolean not)	Set to true if this is a "not like", or false if just a like
void	toPrecedenceFreeEPL(StringWriter writer)	Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Methods inherited from class com.espertech.esper.common.client.soda.ExpressionBase

addChild, getChildren, getTreeObjectName, renderAggregation, setChildren, setTreeObjectName, toEPL, toPrecedenceFreeEPL, toPrecedenceFreeEPL

Methods inherited from class java.lang.Object

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

Constructor Details

LikeExpression

public LikeExpression()

Ctor - for use to create an expression tree, without child expression.

Use add methods to add child expressions to acts upon.

LikeExpression

public LikeExpression(boolean isNot)

Ctor - for use to create an expression tree, without child expression.

Use add methods to add child expressions to acts upon.

Parameters:

isNot - if the like-expression is negated

LikeExpression

public LikeExpression(Expression left,
 Expression right)

Ctor.

Parameters:

left - provides the value to match

right - provides the like-expression to match against

LikeExpression

public LikeExpression(Expression left,
 Expression right,
 Expression escape)

Ctor.

Parameters:

left - provides the value to match

right - provides the like-expression to match against

escape - is the expression providing the string escape character

LikeExpression

public LikeExpression(Expression left,
 Expression right,
 boolean isNot)

Ctor.

Parameters:

left - provides the value to match

right - provides the like-expression to match against

isNot - if the like-expression is negated

LikeExpression

public LikeExpression(Expression left,
 Expression right,
 Expression escape,
 boolean isNot)

Ctor.

Parameters:

left - provides the value to match

right - provides the like-expression to match against

escape - is the expression providing the string escape character

isNot - if the like-expression is negated

Method Details

getPrecedence

public ExpressionPrecedenceEnum getPrecedence()

Description copied from interface: Expression

Returns precedence.

Returns:

precedence

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(StringWriter writer)

Description copied from class: ExpressionBase

Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Specified by:

toPrecedenceFreeEPL in class ExpressionBase

Parameters:

writer - is the output to use

isNot

public boolean isNot()

Returns true if this is a "not like", or false if just a like

Returns:

indicator whether negated or not

setNot

public void setNot(boolean not)

Set to true if this is a "not like", or false if just a like

Parameters:

not - indicator whether negated or not

getNot

public boolean getNot()

Returns true if this is a "not like", or false if just a like

Returns:

indicator whether negated or not