Summary: Methods | [Expand All]

Also: SpringExpressions

public interface

SpelNode

org.springframework.expression.spel.SpelNode

Known Indirect Subclasses

Assign, BeanReference, BooleanLiteral, CompoundExpression, ConstructorReference, Elvis, FunctionReference, Identifier, Indexer, InlineList, IntLiteral, Literal, LongLiteral, MethodReference, NullLiteral, and 29 others.

Assign	Represents assignment.
BeanReference	Represents a bean reference to a type, for example "@foo" or "@'foo.bar'"
BooleanLiteral	Represents the literal values TRUE and FALSE.
CompoundExpression	Represents a DOT separated expression sequence, such as 'property1.property2.methodOne()'
ConstructorReference	Represents the invocation of a constructor.
Elvis	Represents the elvis operator ?:.
FunctionReference	A function reference is of the form "#someFunction(a,b,c)".
Identifier
Indexer	An Indexer can index into some proceeding structure to access a particular piece of it.
InlineList	Represent a list in an expression, e.g.
IntLiteral	Expression language AST node that represents an integer literal.
Literal	Common superclass for nodes representing literals (boolean, string, number, etc).
LongLiteral	Expression language AST node that represents a long integer literal.
MethodReference
NullLiteral
OpAnd	Represents the boolean AND operation.
OpDivide	Implements division operator.
OpEQ	Implements equality operator.
OpGE	Implements greater-than-or-equal operator.
OpGT	Implements greater-than operator.
OpLE	Implements the less-than-or-equal operator.
OpLT	Implements the less-than operator.
OpMinus	The minus operator supports: subtraction of doubles (floats are represented as doubles) subtraction of longs subtraction of integers subtraction of an int from a string of one character (effectively decreasing that character), so 'd'-3='a' It can be used as a unary operator for numbers (double/long/int).
OpModulus	Implements the modulus operator.
OpMultiply	Implements the multiply operator.
OpNE	Implements the not-equal operator.
OpOr	Represents the boolean OR operation.
OpPlus	The plus operator will: add doubles (floats are represented as doubles) add longs add integers concatenate strings It can be used as a unary operator for numbers (double/long/int).
Operator	Common supertype for operators that operate on either one or two operands.
OperatorBetween	Represents the between operator.
OperatorInstanceof	The operator 'instanceof' checks if an object is of the class specified in the right hand operand, in the same way that `instanceof` does in Java.
OperatorMatches	Implements the matches operator.
OperatorNot	Represents a NOT operation.
OperatorPower	The power operator.
Projection	Represents projection, where a given operation is performed on all elements in some input sequence, returning a new sequence of the same size.
PropertyOrFieldReference	Represents a simple property or field reference.
QualifiedIdentifier	Represents a dot separated sequence of strings that indicate a package qualified type reference.
RealLiteral
Selection	Represents selection over a map or collection.
SpelNodeImpl	The common supertype of all AST nodes in a parsed Spring Expression Language format expression.
StringLiteral
Ternary	Represents a ternary expression, for example: "someCheck()?true:false".
TypeReference	Represents a reference to a type, for example "T(String)" or "T(com.somewhere.Foo)"
VariableReference	Represents a variable reference, eg.

Class Overview

Represents a node in the Ast for a parsed expression.

Summary

Public Methods
abstract SpelNode	getChild(int index) Helper method that returns a SpelNode rather than an Antlr Tree node.
abstract int	getChildCount()
abstract int	getEndPosition()
abstract Class<?>	getObjectClass(Object obj) Determine the class of the object passed in, unless it is already a class object.
abstract int	getStartPosition()
abstract TypedValue	getTypedValue(ExpressionState expressionState) Evaluate the expression node in the context of the supplied expression state and return the typed value.
abstract Object	getValue(ExpressionState expressionState) Evaluate the expression node in the context of the supplied expression state and return the value.
abstract boolean	isWritable(ExpressionState expressionState) Determine if this expression node will support a setValue() call.
abstract void	setValue(ExpressionState expressionState, Object newValue) Evaluate the expression to a node and then set the new value on that node.
abstract String	toStringAST()

Public Methods

public abstract SpelNode getChild (int index)

Also: SpringExpressions

Helper method that returns a SpelNode rather than an Antlr Tree node.

Returns

the child node cast to a SpelNode

public abstract int getChildCount ()

Also: SpringExpressions

Returns

the number of children under this node

public abstract int getEndPosition ()

Also: SpringExpressions

Returns

the end position of this Ast node in the expression string

public abstract Class<?> getObjectClass (Object obj)

Also: SpringExpressions

Determine the class of the object passed in, unless it is already a class object.

Returns

the class of the object if it is not already a class object, or null if the object is null

public abstract int getStartPosition ()

Also: SpringExpressions

Returns

the start position of this Ast node in the expression string

public abstract TypedValue getTypedValue (ExpressionState expressionState)

Also: SpringExpressions

Evaluate the expression node in the context of the supplied expression state and return the typed value.

Parameters

expressionState	the current expression state (includes the context)

Returns

the type value of this node evaluated against the specified state

Throws

EvaluationException

public abstract Object getValue (ExpressionState expressionState)

Also: SpringExpressions

Evaluate the expression node in the context of the supplied expression state and return the value.

Parameters

expressionState	the current expression state (includes the context)

Returns

the value of this node evaluated against the specified state

Throws

EvaluationException

public abstract boolean isWritable (ExpressionState expressionState)

Also: SpringExpressions

Determine if this expression node will support a setValue() call.

Parameters

expressionState	the current expression state (includes the context)

Returns

true if the expression node will allow setValue()

Throws

EvaluationException	if something went wrong trying to determine if the node supports writing

public abstract void setValue (ExpressionState expressionState, Object newValue)

Also: SpringExpressions

Evaluate the expression to a node and then set the new value on that node. For example, if the expression evaluates to a property reference then the property will be set to the new value.

Parameters

expressionState	the current expression state (includes the context)
newValue	the new value

Throws

EvaluationException	if any problem occurs evaluating the expression or setting the new value

public abstract String toStringAST ()

Also: SpringExpressions

Returns

the string form of this AST node

Interfaces

Classes

Enums

Exceptions

SpelNode

Class Overview

Summary

Public Methods

public abstract SpelNode getChild (int index)

Returns

public abstract int getChildCount ()

Returns

public abstract int getEndPosition ()

Returns

public abstract Class<?> getObjectClass (Object obj)

Returns

public abstract int getStartPosition ()

Returns

public abstract TypedValue getTypedValue (ExpressionState expressionState)

Parameters

Returns

Throws

public abstract Object getValue (ExpressionState expressionState)

Parameters

Returns

Throws

public abstract boolean isWritable (ExpressionState expressionState)

Parameters

Returns

Throws

public abstract void setValue (ExpressionState expressionState, Object newValue)

Parameters

Throws

public abstract String toStringAST ()

Returns