de.up.ling.irtg.laboratory

Interface Operation

All Known Implementing Classes:

Operation.ConstructorOperation, Operation.LookupVariableOperation, Operation.MethodOperation, Operation.NullOperation, Operation.PrimitiveTypeOperation, Operation.StringOperation

public interface Operation

The basic building blocks of a Program. Essentially, a program is a sequence of trees of operations.

Author:

groschwitz

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Operation.ConstructorOperation This operation creates a new object with a given java constructor.
static class	Operation.LookupVariableOperation An operation that looks up a variable that was defined in a previous line of the program / task.
static class	Operation.MethodOperation This operation executes a given java method.
static class	Operation.NullOperation Returns always null.
static class	Operation.PrimitiveTypeOperation Creates an operation that always returns a given constant (Number or boolean).
static class	Operation.StringOperation An operation that returns a given constant string.
static class	Operation.WrapperException

Method Summary

Modifier and Type	Method and Description
Object	apply(List<Object> input) Applies the operation.
static Object	executeTree(Tree<Operation> tree) Runs a tree of operations.
Class	getReturnType() Returns the Class of the object this operation returns.

Method Detail

apply

Object apply(List<Object> input)
      throws IllegalAccessException,
             InvocationTargetException,
             InstantiationException

Applies the operation.

Parameters:

input - These inputs are used as parameters for the operation, in the order in which they occur in the list.

Returns:

Throws:

IllegalAccessException

InvocationTargetException

InstantiationException

getReturnType

Class getReturnType()

Returns the Class of the object this operation returns.

Returns:

executeTree

static Object executeTree(Tree<Operation> tree)
                   throws Throwable

Runs a tree of operations. Simple bottom-up execution: Leaves are given empty input lists, and results are fed into parent nodes in the tree.

Parameters:

tree -

Returns:

Throws:

Throwable