org.eclipse.xtend.middleend.javaannotations.internal
Class JavaDefinedFunction

java.lang.Object
  org.eclipse.xtend.backend.functions.AbstractFunction
      org.eclipse.xtend.middleend.javaannotations.internal.JavaDefinedFunction

All Implemented Interfaces:

Function

public final class JavaDefinedFunction
extends AbstractFunction

This class represents a "helper" function that is defined in a Java class but for which the defining object is not an explicit parameter. It is used for "JAVA extension" style functions.
If it represents a non-static method, a single instance of the underlying class is shared by all methods of the class, and across all compilation units etc. from which they are referenced. This single instance is scoped with the ExecutionContext used.

Author:

Arno Haase (http://www.haase-consulting.com)

Field Summary

Fields inherited from class org.eclipse.xtend.backend.functions.AbstractFunction

_returnType

Constructor Summary

JavaDefinedFunction(java.lang.reflect.Method mtd, ExpressionBase guard, BackendTypesystem ts)
shortcut constructor that attempts to derive the parameter types from the method's signature

JavaDefinedFunction(java.lang.reflect.Method mtd, java.util.List<BackendType> parameterTypes, BackendType returnType, ExpressionBase guard)
This constructor provides full control

Method Summary

java.lang.reflect.Method	getMethod()
java.lang.String	getName()
static java.util.List<BackendType>	guessParameterTypes(java.lang.reflect.Method mtd, BackendTypesystem ts)
java.lang.Object	invoke(ExecutionContext ctx, java.lang.Object[] params) this method is permitted to modify the param array that is passed in
java.lang.String	toString()

Methods inherited from class org.eclipse.xtend.backend.functions.AbstractFunction

getFunctionDefContext, getGuard, getParameterTypes, getReturnType, isCached, setFunctionDefContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

JavaDefinedFunction

public JavaDefinedFunction(java.lang.reflect.Method mtd,
                           ExpressionBase guard,
                           BackendTypesystem ts)

shortcut constructor that attempts to derive the parameter types from the method's signature

JavaDefinedFunction

public JavaDefinedFunction(java.lang.reflect.Method mtd,
                           java.util.List<BackendType> parameterTypes,
                           BackendType returnType,
                           ExpressionBase guard)

This constructor provides full control

Method Detail

guessParameterTypes

public static java.util.List<BackendType> guessParameterTypes(java.lang.reflect.Method mtd,
                                                              BackendTypesystem ts)

getName

public java.lang.String getName()

getMethod

public java.lang.reflect.Method getMethod()

invoke

public java.lang.Object invoke(ExecutionContext ctx,
                               java.lang.Object[] params)

Description copied from interface: Function

this method is permitted to modify the param array that is passed in

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object