Package org.springframework.binding.expression.support

Class FluentParserContext

java.lang.Object

org.springframework.binding.expression.support.FluentParserContext

All Implemented Interfaces:

ParserContext

public class FluentParserContext
extends Object
implements ParserContext

Default implementation of the ParserContext interface that has a fluent API for building parser context attributes.

Author:

Keith Donald

Constructor Summary

Constructors

Constructor	Description
FluentParserContext()	Create a new parser context, initially with all context attributes as null.

Method Summary

Modifier and Type	Method	Description
FluentParserContext	evaluate(Class<?> contextType)	Configure the evaluationContextType attribute with the value provided.
FluentParserContext	expectResult(Class<?> resultType)	Configure the expectedEvaluationResult attribute with the value provided.
Class<?>	getEvaluationContextType()	Returns the type of context object the parsed expression will evaluate in.
Class<?>	getExpectedEvaluationResultType()	Returns the expected type of object returned from evaluating the parsed expression.
ExpressionVariable[]	getExpressionVariables()	Returns additional expression variables or aliases that can be referenced during expression evaluation.
boolean	isTemplate()	Whether or not the expression being parsed is a template.
FluentParserContext	template()	Sets a flag indicating the expression to parse is a template.
FluentParserContext	variable(ExpressionVariable variable)	Add an expression variable that can be referenced by the expression.
FluentParserContext	variables(ExpressionVariable... variables)	Add an array of expression variables that can be referenced by the expression.

Methods inherited from class java.lang.Object

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

Constructor Details

FluentParserContext

public FluentParserContext()

Create a new parser context, initially with all context attributes as null. Post construction, call one or more of the fluent builder methods to configure this context.

See Also:

• evaluate(Class)
• expectResult(Class)
• variable(ExpressionVariable)
• template()

Method Details

getEvaluationContextType

public Class<?> getEvaluationContextType()

Description copied from interface: ParserContext

Returns the type of context object the parsed expression will evaluate in. An expression parser may use this value to install custom variable resolves for that particular type of context.

Specified by:

getEvaluationContextType in interface ParserContext

Returns:

the evaluation context type

getExpectedEvaluationResultType

public Class<?> getExpectedEvaluationResultType()

Description copied from interface: ParserContext

Returns the expected type of object returned from evaluating the parsed expression. An expression parser may use this value to coerce an raw evaluation result before it is returned.

Specified by:

getExpectedEvaluationResultType in interface ParserContext

Returns:

the expected evaluation result type

getExpressionVariables

public ExpressionVariable[] getExpressionVariables()

Description copied from interface: ParserContext

Returns additional expression variables or aliases that can be referenced during expression evaluation. An expression parser will register these variables for reference during evaluation.

Specified by:

getExpressionVariables in interface ParserContext

isTemplate

public boolean isTemplate()

Description copied from interface: ParserContext

Whether or not the expression being parsed is a template. A template expression consists of literal text that can be mixed with evaluatable blocks. Some examples:

           Some literal text
     Hello #{name.firstName}!
     #{3 + 4}
 

Specified by:

isTemplate in interface ParserContext

Returns:

true if the expression is a template, false otherwise

evaluate

public FluentParserContext evaluate(Class<?> contextType)

Configure the evaluationContextType attribute with the value provided.

Parameters:

contextType - the type of context object the parsed expression will evaluate in

Returns:

this

expectResult

public FluentParserContext expectResult(Class<?> resultType)

Configure the expectedEvaluationResult attribute with the value provided.

Parameters:

resultType - the type of result object the parsed expression should return when evaluated

Returns:

this

variable

public FluentParserContext variable(ExpressionVariable variable)

Add an expression variable that can be referenced by the expression.

Parameters:

variable - the expression variable

Returns:

this

variables

public FluentParserContext variables(ExpressionVariable... variables)

Add an array of expression variables that can be referenced by the expression.

Parameters:

variables - the expression variables

Returns:

this

template

public FluentParserContext template()

Sets a flag indicating the expression to parse is a template.

Returns:

this