org.panda_lang.framework.design.interpreter.parser.expression

Class ExpressionResult

java.lang.Object

org.panda_lang.framework.design.interpreter.parser.expression.ExpressionResult

public final class ExpressionResult
extends Object

Result wrapper that may contain the result expression, error or nothing

Method Summary

Modifier and Type	Method and Description
boolean	containsError() Check if result contains error
static ExpressionResult	empty()
static ExpressionResult	error(String message, ExpressionContext context) Create error result
static ExpressionResult	error(String message, Snippetable source) Create error result
Expression	get() Get result expression
@Nullable String	getErrorMessage() Get error message
Snippetable	getErrorSource() Get indicated error source
boolean	isEmpty() Check if wrapper does not contain expression
boolean	isPresent() Check if result is present
static ExpressionResult	of(Expressible expressible) Create result
Expression	orElseGet(Supplier<? extends Expression> supplier)

Methods inherited from class java.lang.Object

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

Method Detail

isEmpty

public boolean isEmpty()

Check if wrapper does not contain expression

Returns:

true if wrapper contains result

isPresent

public boolean isPresent()

Check if result is present

Returns:

true if the result expression is present, otherwise false

containsError

public boolean containsError()

Check if result contains error

Returns:

true if result contains error data, otherwise false

orElseGet

public Expression orElseGet(Supplier<? extends Expression> supplier)

get

public Expression get()

Get result expression

Returns:

the result expression

getErrorMessage

@Nullable
public @Nullable String getErrorMessage()

Get error message

Returns:

the error message

getErrorSource

public Snippetable getErrorSource()

Get indicated error source

Returns:

the source

of

public static ExpressionResult of(Expressible expressible)

Create result

Parameters:

expressible - the result expression

Returns:

the result

error

public static ExpressionResult error(String message,
                                     ExpressionContext context)

Create error result

Parameters:

message - the error message

context - the expression context

Returns:

the error result

error

public static ExpressionResult error(String message,
                                     Snippetable source)

Create error result

Parameters:

message - the error message

source - the indicated source

Returns:

the error result

empty

public static ExpressionResult empty()

Returns:

get empty result