public abstract class Expression extends ASTNode
Expression:
Name
IntegerLiteral (includes decimal, hex, and octal forms; and long)
FloatingPointLiteral (includes both float and double)
CharacterLiteral
NullLiteral
BooleanLiteral
StringLiteral
TypeLiteral
ThisExpression
SuperFieldAccess
FieldAccess
Assignment
ParenthesizedExpression
ClassInstanceCreation
ArrayCreation
ArrayInitializer
FunctionInvocation
SuperMethodInvocation
ArrayAccess
InfixExpression
InstanceofExpression
ConditionalExpression
PostfixExpression
PrefixExpression
CastExpression
VariableDeclarationExpression
Provisional API: This class/interface is part of an interim API that is still under development and expected to
change significantly before reaching stability. It is being made available at this early stage to solicit feedback
from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
(repeatedly) as the API evolves.ANONYMOUS_CLASS_DECLARATION, ARRAY_ACCESS, ARRAY_CREATION, ARRAY_INITIALIZER, ARRAY_NAME, ARRAY_TYPE, ARROW_FUNCTION_EXPRESSION, ASSIGNMENT, ASSIGNMENT_NAME, BLOCK, BLOCK_COMMENT, BOOLEAN_LITERAL, BREAK_STATEMENT, CATCH_CLAUSE, CHARACTER_LITERAL, CLASS_INSTANCE_CREATION, CONDITIONAL_EXPRESSION, CONSTRUCTOR_INVOCATION, CONTINUE_STATEMENT, DEBUGGER_STATEMENT, DO_STATEMENT, EMPTY_EXPRESSION, EMPTY_STATEMENT, ENHANCED_FOR_STATEMENT, EXPORT_DECLARATION, EXPRESSION_STATEMENT, FIELD_ACCESS, FIELD_DECLARATION, FOR_IN_STATEMENT, FOR_OF_STATEMENT, FOR_STATEMENT, FUNCTION_DECLARATION, FUNCTION_DECLARATION_STATEMENT, FUNCTION_EXPRESSION, FUNCTION_INVOCATION, FUNCTION_REF, FUNCTION_REF_PARAMETER, IF_STATEMENT, IMPORT_DECLARATION, INFERRED_TYPE, INFIX_EXPRESSION, INITIALIZER, INSTANCEOF_EXPRESSION, JAVASCRIPT_UNIT, JSDOC, LABELED_STATEMENT, LINE_COMMENT, LIST_EXPRESSION, MALFORMED, MEMBER_REF, META_PROPERTY, MODIFIER, MODULE_SPECIFIER, NULL_LITERAL, NUMBER_LITERAL, OBJECT_LITERAL, OBJECT_LITERAL_FIELD, OBJECT_NAME, ORIGINAL, PACKAGE_DECLARATION, PARENTHESIZED_EXPRESSION, POSTFIX_EXPRESSION, PREFIX_EXPRESSION, PRIMITIVE_TYPE, PROTECT, QUALIFIED_NAME, QUALIFIED_TYPE, RECOVERED, REGULAR_EXPRESSION_LITERAL, REST_ELEMENT_NAME, RETURN_STATEMENT, SIMPLE_NAME, SIMPLE_TYPE, SINGLE_VARIABLE_DECLARATION, SPREAD_ELEMENT, STRING_LITERAL, SUPER_CONSTRUCTOR_INVOCATION, SUPER_FIELD_ACCESS, SUPER_METHOD_INVOCATION, SWITCH_CASE, SWITCH_STATEMENT, TAG_ELEMENT, TEMPLATE_ELEMENT, TEMPLATE_LITERAL, TEXT_ELEMENT, THIS_EXPRESSION, THROW_STATEMENT, TRY_STATEMENT, TYPE_DECLARATION, TYPE_DECLARATION_EXPRESSION, TYPE_DECLARATION_STATEMENT, TYPE_LITERAL, UNDEFINED_LITERAL, VARIABLE_DECLARATION_EXPRESSION, VARIABLE_DECLARATION_FRAGMENT, VARIABLE_DECLARATION_STATEMENT, WHILE_STATEMENT, WITH_STATEMENT, YIELD_EXPRESSION| Modifier and Type | Method and Description |
|---|---|
boolean |
resolveBoxing()
Returns whether this expression node is the site of a boxing
conversion (JLS3 5.1.7).
|
java.lang.Object |
resolveConstantExpressionValue()
Resolves and returns the compile-time constant expression value as
specified in JLS2 15.28, if this expression has one.
|
ITypeBinding |
resolveTypeBinding()
Resolves and returns the binding for the type of this expression.
|
boolean |
resolveUnboxing()
Returns whether this expression node is the site of an unboxing
conversion (JLS3 5.1.8).
|
accept, copySubtree, copySubtrees, delete, equals, getAST, getBodyChild, getFlags, getLength, getLocationInParent, getNodeType, getParent, getProperty, getRoot, getStartPosition, getStructuralProperty, hashCode, nodeClassForType, properties, setFlags, setProperty, setSourceRange, setStructuralProperty, structuralPropertiesForType, subtreeBytes, subtreeMatch, toStringpublic final java.lang.Object resolveConstantExpressionValue()
Integer);
if the type of the value is String, the result is the string
itself. If the expression does not have a compile-time constant expression
value, the result is null.
Resolving constant expressions takes into account the value of simple and qualified names that refer to constant variables (JLS2 4.12.4).
Note 1: enum constants are not considered constant expressions.
The result is always null for these.
Note 2: Compile-time constant expressions cannot denote null.
So technically NullLiteral nodes are not constant expressions.
The result is null for these nonetheless.
null if this
expression has no constant expression value or if bindings were not
requested when the AST was createdpublic final ITypeBinding resolveTypeBinding()
Note that bindings are generally unavailable unless requested when the AST is being built.
null if the type cannot be resolvedpublic final boolean resolveBoxing()
true if this expression is the site of a
boxing conversion, or false if either no boxing conversion
is involved or if bindings were not requested when the AST was createdpublic final boolean resolveUnboxing()
true if this expression is the site of an
unboxing conversion, or false if either no unboxing
conversion is involved or if bindings were not requested when the
AST was createdCopyright (c) IBM Corp. and others 2000, 2016. All Rights Reserved.