sirius.tagliatelle.expression

Class ConcatExpression

java.lang.Object

sirius.tagliatelle.expression.ConcatExpression

All Implemented Interfaces:

Expression

public class ConcatExpression
extends Object
implements Expression

Resprents a string concatenation operation.

Constructor Summary

Constructors

Constructor and Description
ConcatExpression(Expression... expressions) Creates a new string concatenation for the given expressions

Method Summary

Modifier and Type	Method and Description
void	add(Expression expr)
Expression	copy() Creates a deep copy of the expression which can be modified without affecting the original expression.
Object	eval(LocalRenderContext ctx) Evaluates the expression into an object using the given context.
Class<?>	getType() Returns the Java class of the objects yielded by this expression.
boolean	isConstant() Determines if the expression is constant.
Expression	propagateVisitor(ExpressionVisitor visitor) Visits all child nodes and then the node itself.
Expression	reduce() Tries to optimize the expression by pre-concatenating adjacent constant operands.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatExpression

public ConcatExpression(Expression... expressions)

Creates a new string concatenation for the given expressions

Parameters:

expressions - the list of expressions to evaluate and concatenate.

Method Detail

add

public void add(Expression expr)

copy

public Expression copy()

Description copied from interface: Expression

Creates a deep copy of the expression which can be modified without affecting the original expression.

Specified by:

copy in interface Expression

Returns:

a deep copy of the expression

propagateVisitor

public Expression propagateVisitor(ExpressionVisitor visitor)

Description copied from interface: Expression

Visits all child nodes and then the node itself.

Specified by:

propagateVisitor in interface Expression

Parameters:

visitor - the visitor to invoke for all child nodes and on the node itself

Returns:

the result of the invocation of the given visitor on this node

reduce

public Expression reduce()

Tries to optimize the expression by pre-concatenating adjacent constant operands.

Specified by:

reduce in interface Expression

Returns:

an optimized (if possible) expression with a minimal number of constant operands

isConstant

public boolean isConstant()

Description copied from interface: Expression

Determines if the expression is constant.

Specified by:

isConstant in interface Expression

Returns:

true if the expression is constant, false otherwise

eval

public Object eval(LocalRenderContext ctx)

Description copied from interface: Expression

Evaluates the expression into an object using the given context.

Specified by:

eval in interface Expression

Parameters:

ctx - the current rendering context

Returns:

the result of the evaluation

getType

public Class<?> getType()

Description copied from interface: Expression

Returns the Java class of the objects yielded by this expression.

Specified by:

getType in interface Expression

Returns:

the type of objects created by this expression

toString

public String toString()

Overrides:

toString in class Object