sirius.tagliatelle.compiler

Class ExpressionHandler

java.lang.Object

sirius.tagliatelle.compiler.ExpressionHandler

All Implemented Interfaces:

sirius.kernel.di.std.Priorized

Direct Known Subclasses:

AttributeExpressionHandler, EvalExpressionHandler, ForHandler, IfHandler, RawHandler

public abstract class ExpressionHandler
extends Object
implements sirius.kernel.di.std.Priorized

Subclasses can be registered and will be used to handle compiler expressions starting with @.

Field Summary

Fields inherited from interface sirius.kernel.di.std.Priorized

DEFAULT_PRIORITY

Constructor Summary

Constructors

Constructor and Description
ExpressionHandler()

Method Summary

Modifier and Type	Method and Description
int	getPriority()
abstract Emitter	process(Compiler compiler) Processes the expression initialized by an @ in the source code.
abstract boolean	shouldProcess(Compiler compiler) Determines if this handler is responsible, based on the current state of the reader.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionHandler

public ExpressionHandler()

Method Detail

getPriority

public int getPriority()

Specified by:

getPriority in interface sirius.kernel.di.std.Priorized

shouldProcess

public abstract boolean shouldProcess(Compiler compiler)

Determines if this handler is responsible, based on the current state of the reader.

Parameters:

compiler - the compiler which provides access to the InputProcessor.getReader() and Compiler.getContext().

Returns:

true if this handler should parse the expression (the reader currently points to the @ in the source code)

process

@Nullable
public abstract Emitter process(Compiler compiler)

Processes the expression initialized by an @ in the source code.

Parameters:

compiler - the compiler which provides access to the InputProcessor.getReader() and Compiler.getContext().

Returns:

the emitter which represents the parsed source