public class MethodExpression extends Expression
Modifier and Type | Field and Description |
---|---|
private java.util.List<Expression> |
arguments |
private java.util.List<Type> |
argumentTypes |
private boolean |
isPublicMethod |
private java.lang.reflect.Method |
method |
private int |
methodIndex
index fo method object in rule's accessible method list
|
private java.lang.String |
name |
private java.util.List<Type> |
paramTypes |
(package private) java.lang.String[] |
pathList |
private Expression |
recipient |
private Type |
rootType |
Constructor and Description |
---|
MethodExpression(Rule rule,
Type type,
ParseNode token,
Expression recipient,
java.util.List<Expression> arguments,
java.lang.String[] pathList) |
Modifier and Type | Method and Description |
---|---|
java.lang.reflect.Method |
bestMatchCandidate(java.util.List<java.lang.reflect.Method> candidates)
return the method whose signature is the best fit for the call argument types.
|
void |
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
|
void |
compile(MethodVisitor mv,
CompileContext compileContext) |
private void |
findMethod(boolean publicOnly)
find a method to resolve this method call expression.
|
java.lang.Class |
getCandidateArgClass(java.util.List<java.lang.reflect.Method> candidates,
int argIdx) |
private java.lang.String |
getDescriptor() |
java.lang.String |
getPath(int len) |
int |
getPathCount(java.lang.String name) |
java.lang.Object |
interpret(HelperAdapter helper)
evaluate the expression by interpreting the expression tree
|
java.util.List<java.lang.reflect.Method> |
pruneCandidates(java.util.List<java.lang.reflect.Method> candidates,
int argIdx,
java.lang.Class argClazz)
prune the candidates list removing all methods whose parameter at index argIdx cannto be assigned to
class argClazz
|
Type |
typeCheck(Type expected)
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 |
writeTo(java.io.StringWriter stringWriter) |
getPos, getType
compileBooleanConversion, compileBox, compileNumericConversion, compileObjectConversion, compilePrimitiveConversion, compileStringConversion, compileTypeConversion, compileUnbox, getBindings, getTypeGroup, toString
private java.lang.String name
private java.util.List<Expression> arguments
private java.util.List<Type> argumentTypes
private java.util.List<Type> paramTypes
private Expression recipient
private Type rootType
private java.lang.reflect.Method method
java.lang.String[] pathList
private int methodIndex
private boolean isPublicMethod
public MethodExpression(Rule rule, Type type, ParseNode token, Expression recipient, java.util.List<Expression> arguments, java.lang.String[] pathList)
public void bind() throws TypeException
bind
in class Expression
TypeException
public Type typeCheck(Type expected) throws TypeException
Expression
typeCheck
in class Expression
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.TypeException
private void findMethod(boolean publicOnly) throws TypeException
publicOnly
- true if only public methods should be consideredTypeException
public java.lang.Object interpret(HelperAdapter helper) throws ExecuteException
Expression
interpret
in class Expression
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", ...)ExecuteException
public void compile(MethodVisitor mv, CompileContext compileContext) throws CompileException
compile
in class RuleElement
CompileException
private java.lang.String getDescriptor()
public java.lang.Class getCandidateArgClass(java.util.List<java.lang.reflect.Method> candidates, int argIdx)
public java.util.List<java.lang.reflect.Method> pruneCandidates(java.util.List<java.lang.reflect.Method> candidates, int argIdx, java.lang.Class argClazz)
candidates
- argIdx
- argClazz
- public java.lang.reflect.Method bestMatchCandidate(java.util.List<java.lang.reflect.Method> candidates)
candidates
- a list of methods all of whose signatures are assignable from thepublic java.lang.String getPath(int len)
public int getPathCount(java.lang.String name)
public void writeTo(java.io.StringWriter stringWriter)
writeTo
in class Expression