spring-framework / org.springframework.expression.spel.standard / SpelExpression

SpelExpression

open class SpelExpression : Expression

A SpelExpression represents a parsed (valid) expression that is ready to be evaluated in a specified context. An expression can be evaluated standalone or in a specified context. During expression evaluation the context may be asked to resolve references to types, beans, properties, and methods.

Author
Andy Clement

Author
Juergen Hoeller

Since
3.0

Constructors

<init>

SpelExpression(expression: String, ast: SpelNodeImpl, configuration: SpelParserConfiguration)

Construct an expression, only used by the parser.

Functions

compileExpression	`open fun compileExpression(): Boolean` Perform expression compilation. This will only succeed once exit descriptors for all nodes have been determined. If the compilation fails and has failed more than 100 times the expression is no longer considered suitable for compilation.
getAST	`open fun getAST(): SpelNode` Return the Abstract Syntax Tree for the expression.
getEvaluationContext	`open fun getEvaluationContext(): EvaluationContext` Return the default evaluation context that will be used if none is supplied on an evaluation call.
getExpressionString	`open fun getExpressionString(): String`
getValue	`open fun getValue(): Any` `open fun <T : Any> getValue(expectedResultType: Class<T>): T` `open fun getValue(rootObject: Any): Any` `open fun <T : Any> getValue(rootObject: Any, expectedResultType: Class<T>): T` `open fun getValue(context: EvaluationContext): Any` `open fun <T : Any> getValue(context: EvaluationContext, expectedResultType: Class<T>): T` `open fun getValue(context: EvaluationContext, rootObject: Any): Any` `open fun <T : Any> getValue(context: EvaluationContext, rootObject: Any, expectedResultType: Class<T>): T`
getValueType	`open fun getValueType(): Class<>` `open fun getValueType(rootObject: Any): Class<>` `open fun getValueType(context: EvaluationContext): Class<>` `open fun getValueType(context: EvaluationContext, rootObject: Any): Class<>`
getValueTypeDescriptor	`open fun getValueTypeDescriptor(): TypeDescriptor` `open fun getValueTypeDescriptor(rootObject: Any): TypeDescriptor` `open fun getValueTypeDescriptor(context: EvaluationContext): TypeDescriptor` `open fun getValueTypeDescriptor(context: EvaluationContext, rootObject: Any): TypeDescriptor`
isWritable	`open fun isWritable(rootObject: Any): Boolean` `open fun isWritable(context: EvaluationContext): Boolean` `open fun isWritable(context: EvaluationContext, rootObject: Any): Boolean`
revertToInterpreted	`open fun revertToInterpreted(): Unit` Cause an expression to revert to being interpreted if it has been using a compiled form. It also resets the compilation attempt failure count (an expression is normally no longer considered compilable if it cannot be compiled after 100 attempts).
setEvaluationContext	`open fun setEvaluationContext(evaluationContext: EvaluationContext): Unit` Set the evaluation context that will be used if none is specified on an evaluation call.
setValue	`open fun setValue(rootObject: Any, value: Any): Unit` `open fun setValue(context: EvaluationContext, value: Any): Unit` `open fun setValue(context: EvaluationContext, rootObject: Any, value: Any): Unit`
toStringAST	`open fun toStringAST(): String` Produce a string representation of the Abstract Syntax Tree for the expression. This should ideally look like the input expression, but properly formatted since any unnecessary whitespace will have been discarded during the parse of the expression.