Top Description Fields Constructors Methods
org.springframework.expression.spel.ast

public Class OperatorNot

extends SpelNodeImpl
Class Inheritance
Imports
org.springframework.asm.Label, .MethodVisitor, org.springframework.expression.EvaluationException, org.springframework.expression.spel.CodeFlow, .ExpressionState, .SpelEvaluationException, .SpelMessage, org.springframework.expression.spel.support.BooleanTypedValue
Represents a NOT operation.
Authors
Andy Clement, Mark Fisher, Oliver Becker
Since
3.0

Field Summary

Inherited from org.springframework.expression.spel.ast.SpelNodeImpl:
childrenexitTypeDescriptor

Constructor Summary

AccessConstructor and Description
public
OperatorNot(int startPos, int endPos, SpelNodeImpl operand)

Method Summary

Modifier and TypeMethod and Description
public void
generateCode(MethodVisitor
the ASM MethodVisitor into which code should be generated
mv, CodeFlow
a context object with info about what is on the stack
cf)

Overrides org.springframework.expression.spel.ast.SpelNodeImpl.generateCode.

Generate the bytecode for this node into the supplied visitor.
public BooleanTypedValue
getValueInternal(ExpressionState state)

Implements abstract org.springframework.expression.spel.ast.SpelNodeImpl.getValueInternal.

public boolean
isCompilable()

Overrides org.springframework.expression.spel.ast.SpelNodeImpl.isCompilable.

Check whether a node can be compiled to bytecode.
public String
toStringAST()

Implements org.springframework.expression.spel.SpelNode.toStringAST.

Return the string form of this AST node.
Inherited from org.springframework.expression.spel.ast.SpelNodeImpl:
generateCodeForArgumentgenerateCodeForArgumentsgetChildgetChildCountgetEndPositiongetExitDescriptorgetObjectClassgetStartPositiongetTypedValuegetValuegetValuegetValueRefisWritablenextChildIssetValuesetValueInternal

Constructor Detail

OperatorNotback to summary
public OperatorNot(int startPos, int endPos, SpelNodeImpl operand)

Method Detail

generateCodeback to summary
public void generateCode(MethodVisitor mv, CodeFlow cf)

Overrides org.springframework.expression.spel.ast.SpelNodeImpl.generateCode.

Doc from org.springframework.expression.spel.ast.SpelNodeImpl.generateCode.

Generate the bytecode for this node into the supplied visitor. Context info about the current expression being compiled is available in the codeflow object, e.g. including information about the type of the object currently on the stack.

Parameters
mv:MethodVisitor

the ASM MethodVisitor into which code should be generated

cf:CodeFlow

a context object with info about what is on the stack

Annotations
@Override
getValueInternalback to summary
public BooleanTypedValue getValueInternal(ExpressionState state) throws EvaluationException

Implements abstract org.springframework.expression.spel.ast.SpelNodeImpl.getValueInternal.

Annotations
@Override
isCompilableback to summary
public boolean isCompilable()

Overrides org.springframework.expression.spel.ast.SpelNodeImpl.isCompilable.

Doc from org.springframework.expression.spel.ast.SpelNodeImpl.isCompilable.

Check whether a node can be compiled to bytecode. The reasoning in each node may be different but will typically involve checking whether the exit type descriptor of the node is known and any relevant child nodes are compilable.

Returns:boolean

true if this node can be compiled to bytecode

Annotations
@Override
toStringASTback to summary
public String toStringAST()

Implements org.springframework.expression.spel.SpelNode.toStringAST.

Doc from org.springframework.expression.spel.SpelNode.toStringAST.

Return the string form of this AST node.

Returns:String

the string form

Annotations
@Override