Class StaticExpression
java.lang.Object
org.jboss.byteman.rule.RuleElement
org.jboss.byteman.rule.expression.Expression
org.jboss.byteman.rule.expression.AssignableExpression
org.jboss.byteman.rule.expression.StaticExpression
an expression which identifies a static field reference
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Field Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
bind()
verify that variables mentioned in this expression are actually available in the supplied bindings list and infer/validate the type of this expression or its subexpressions where possiblevoid
treat this as a normal bind because an update to a field reference does not update any bindingsvoid
compile
(org.objectweb.asm.MethodVisitor mv, CompileContext compileContext) void
compileAssign
(org.objectweb.asm.MethodVisitor mv, CompileContext compileContext) compile an assignment to the referenced location using the value on the top of the Java stack.interpret
(HelperAdapter helper) evaluate the expression by interpreting the expression treeinterpretAssign
(HelperAdapter helperAdapter, Object value) execute an assignment to the referenced location by interpretation of the expression, using the object passed in this callprivate Field
lookupField
(Class<?> ownerClazz, boolean isAssign) ensure that all type references in the expression and its component expressions can be resolved, that the type of the expression is well-defined and that it is compatible with the type expected in the context in which it occurs.void
typeCheckAny
(boolean isAssign) typeCheckAssign
(Type expected) typecheck the expression as an lvalue of an assignment operationvoid
writeTo
(StringWriter stringWriter) Methods inherited from class org.jboss.byteman.rule.expression.Expression
getPos, getType
Methods inherited from class org.jboss.byteman.rule.RuleElement
getBindings, getTypeGroup, rebox, toString
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Field Details
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ownerTypeName
the list of path components which may include package qualifiers, the class name, the field name and subordinate field references -
fieldName
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field
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ownerType
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isPublicField
private boolean isPublicField -
fieldIndex
private int fieldIndex
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Constructor Details
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StaticExpression
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Method Details
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bind
verify that variables mentioned in this expression are actually available in the supplied bindings list and infer/validate the type of this expression or its subexpressions where possible- Specified by:
bind
in classExpression
- Throws:
TypeException
- if any variable is missing or has the wrong type
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bindAssign
treat this as a normal bind because an update to a field reference does not update any bindings- Specified by:
bindAssign
in classAssignableExpression
- Throws:
TypeException
- if any variable is missing or has the wrong type
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typeCheck
Description copied from class:Expression
ensure that all type references in the expression and its component expressions can be resolved, that the type of the expression is well-defined and that it is compatible with the type expected in the context in which it occurs.- Specified by:
typeCheck
in classExpression
- Parameters:
expected
- the type expected for the expression in the contxet in which it occurs. this may be void but should not be undefined at the point where type checking is performed.- Returns:
- the type of the expression
- Throws:
TypeException
- if a type check failure occurs
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typeCheckAssign
Description copied from class:AssignableExpression
typecheck the expression as an lvalue of an assignment operation- Specified by:
typeCheckAssign
in classAssignableExpression
- Parameters:
expected
- the expected type for the expression- Returns:
- the expression type
- Throws:
TypeException
- if a type check error occurs
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typeCheckAny
- Throws:
TypeException
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interpret
Description copied from class:Expression
evaluate the expression by interpreting the expression tree- Specified by:
interpret
in classExpression
- Parameters:
helper
- an execution context associated with the rule which contains a map of current bindings for rule variables and another map of their declared types both of which are indexed by variable name. This includes entries for the helper (name "-1"), the recipient if the trigger method is not static (name "0") and the trigger method arguments (names "1", ...)- Returns:
- the result of evaluation as an Object
- Throws:
ExecuteException
- if an error occurs during execution
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compile
public void compile(org.objectweb.asm.MethodVisitor mv, CompileContext compileContext) throws CompileException - Specified by:
compile
in classRuleElement
- Throws:
CompileException
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writeTo
- Specified by:
writeTo
in classExpression
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interpretAssign
Description copied from class:AssignableExpression
execute an assignment to the referenced location by interpretation of the expression, using the object passed in this call- Specified by:
interpretAssign
in classAssignableExpression
- Parameters:
helperAdapter
- an execution context associated with the rule which contains a map of current bindings for rule variables and another map of their declared types both of which are indexed by variable name. This includes entries for the helper (name "-1"), the recipient if the trigger method is not static (name "0") and the trigger method arguments (names "1", ...)value
- the value to be assigned to this object- Returns:
- the result of evaluation as an Object
- Throws:
ExecuteException
- if an error occurs during execution
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compileAssign
public void compileAssign(org.objectweb.asm.MethodVisitor mv, CompileContext compileContext) throws CompileException Description copied from class:AssignableExpression
compile an assignment to the referenced location using the value on the top of the Java stack.- Specified by:
compileAssign
in classAssignableExpression
- Parameters:
mv
- the current method visitorcompileContext
- the current compile context- Throws:
CompileException
- if a compile error occurs
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lookupField
- Throws:
NoSuchFieldException
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