src/jdk/nashorn/internal/runtime/UserAccessorProperty.java - platform/external/jetbrains/jdk8u_nashorn - Git at Google

 /*
  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 package jdk.nashorn.internal.runtime;
 import static jdk.nashorn.internal.lookup.Lookup.MH;
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
 import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.CALLSITE_PROGRAM_POINT_SHIFT;

 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import java.util.concurrent.Callable;
 import jdk.nashorn.internal.lookup.Lookup;
 import jdk.nashorn.internal.runtime.linker.Bootstrap;
 import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;

 /**
  * Property with user defined getters/setters. Actual getter and setter
  * functions are stored in underlying ScriptObject. Only the 'slot' info is
  * stored in the property.
  */
 public final class UserAccessorProperty extends SpillProperty {

     private static final long serialVersionUID = -5928687246526840321L;

     static final class Accessors {
         Object getter;
         Object setter;

         Accessors(final Object getter, final Object setter) {
             set(getter, setter);
         }

         final void set(final Object getter, final Object setter) {
             this.getter = getter;
             this.setter = setter;
         }

         @Override
         public String toString() {
             return "[getter=" + getter + " setter=" + setter + ']';
         }
     }

     private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();

     /** Getter method handle */
     private final static MethodHandle INVOKE_OBJECT_GETTER = findOwnMH_S("invokeObjectGetter", Object.class, Accessors.class, MethodHandle.class, Object.class);
     private final static MethodHandle INVOKE_INT_GETTER  = findOwnMH_S("invokeIntGetter", int.class, Accessors.class, MethodHandle.class, int.class, Object.class);
     private final static MethodHandle INVOKE_NUMBER_GETTER  = findOwnMH_S("invokeNumberGetter", double.class, Accessors.class, MethodHandle.class, int.class, Object.class);

     /** Setter method handle */
     private final static MethodHandle INVOKE_OBJECT_SETTER = findOwnMH_S("invokeObjectSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, Object.class);
     private final static MethodHandle INVOKE_INT_SETTER = findOwnMH_S("invokeIntSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, int.class);
     private final static MethodHandle INVOKE_NUMBER_SETTER = findOwnMH_S("invokeNumberSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, double.class);

     private static final Object OBJECT_GETTER_INVOKER_KEY = new Object();
     private static MethodHandle getObjectGetterInvoker() {
         return Context.getGlobal().getDynamicInvoker(OBJECT_GETTER_INVOKER_KEY, new Callable<MethodHandle>() {
             @Override
             public MethodHandle call() throws Exception {
                 return getINVOKE_UA_GETTER(Object.class, INVALID_PROGRAM_POINT);
             }
         });
     }

     static MethodHandle getINVOKE_UA_GETTER(final Class<?> returnType, final int programPoint) {
         if (UnwarrantedOptimismException.isValid(programPoint)) {
             final int flags = NashornCallSiteDescriptor.CALLSITE_OPTIMISTIC | programPoint << CALLSITE_PROGRAM_POINT_SHIFT;
             return Bootstrap.createDynamicInvoker("dyn:call", flags, returnType, Object.class, Object.class);
         } else {
             return Bootstrap.createDynamicInvoker("dyn:call", Object.class, Object.class, Object.class);
         }
     }

     private static final Object OBJECT_SETTER_INVOKER_KEY = new Object();
     private static MethodHandle getObjectSetterInvoker() {
         return Context.getGlobal().getDynamicInvoker(OBJECT_SETTER_INVOKER_KEY, new Callable<MethodHandle>() {
             @Override
             public MethodHandle call() throws Exception {
                 return getINVOKE_UA_SETTER(Object.class);
             }
         });
     }

     static MethodHandle getINVOKE_UA_SETTER(final Class<?> valueType) {
         return Bootstrap.createDynamicInvoker("dyn:call", void.class, Object.class, Object.class, valueType);
     }

     /**
      * Constructor
      *
      * @param key   property key
      * @param flags property flags
      * @param slot  spill slot
      */
     UserAccessorProperty(final String key, final int flags, final int slot) {
         super(key, flags, slot);
     }

     private UserAccessorProperty(final UserAccessorProperty property) {
         super(property);
     }

     private UserAccessorProperty(final UserAccessorProperty property, final Class<?> newType) {
         super(property, newType);
     }

     @Override
     public Property copy() {
         return new UserAccessorProperty(this);
     }

     @Override
     public Property copy(final Class<?> newType) {
         return new UserAccessorProperty(this, newType);
     }

     void setAccessors(final ScriptObject sobj, final PropertyMap map, final Accessors gs) {
         try {
             //invoke the getter and find out
             super.getSetter(Object.class, map).invokeExact((Object)sobj, (Object)gs);
         } catch (final Error | RuntimeException t) {
             throw t;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         }
     }

     //pick the getter setter out of the correct spill slot in sobj
     Accessors getAccessors(final ScriptObject sobj) {
         try {
             //invoke the super getter with this spill slot
             //get the getter setter from the correct spill slot
             final Object gs = super.getGetter(Object.class).invokeExact((Object)sobj);
             return (Accessors)gs;
         } catch (final Error | RuntimeException t) {
             throw t;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         }
     }

     @Override
     protected Class<?> getLocalType() {
         return Object.class;
     }

     @Override
     public boolean hasGetterFunction(final ScriptObject sobj) {
         return getAccessors(sobj).getter != null;
     }

     @Override
     public boolean hasSetterFunction(final ScriptObject sobj) {
         return getAccessors(sobj).setter != null;
     }

     @Override
     public int getIntValue(final ScriptObject self, final ScriptObject owner) {
         return (int)getObjectValue(self, owner);
     }

     @Override
     public double getDoubleValue(final ScriptObject self, final ScriptObject owner) {
         return (double)getObjectValue(self, owner);
     }

     @Override
     public Object getObjectValue(final ScriptObject self, final ScriptObject owner) {
         try {
             return invokeObjectGetter(getAccessors((owner != null) ? owner : self), getObjectGetterInvoker(), self);
         } catch (final Error | RuntimeException t) {
             throw t;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         }
     }

     @Override
     public void setValue(final ScriptObject self, final ScriptObject owner, final int value, final boolean strict) {
         setValue(self, owner, (Object) value, strict);
     }

     @Override
     public void setValue(final ScriptObject self, final ScriptObject owner, final double value, final boolean strict) {
         setValue(self, owner, (Object) value, strict);
     }

     @Override
     public void setValue(final ScriptObject self, final ScriptObject owner, final Object value, final boolean strict) {
         try {
             invokeObjectSetter(getAccessors((owner != null) ? owner : self), getObjectSetterInvoker(), strict ? getKey() : null, self, value);
         } catch (final Error | RuntimeException t) {
             throw t;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         }
     }

     @Override
     public MethodHandle getGetter(final Class<?> type) {
         //this returns a getter on the format (Accessors, Object receiver)
         return Lookup.filterReturnType(INVOKE_OBJECT_GETTER, type);
     }

     @Override
     public MethodHandle getOptimisticGetter(final Class<?> type, final int programPoint) {
         if (type == int.class) {
             return INVOKE_INT_GETTER;
         } else if (type == double.class) {
             return INVOKE_NUMBER_GETTER;
         } else {
             assert type == Object.class;
             return INVOKE_OBJECT_GETTER;
         }
     }

     @Override
     void initMethodHandles(final Class<?> structure) {
         throw new UnsupportedOperationException();
     }

     @Override
     public ScriptFunction getGetterFunction(final ScriptObject sobj) {
         final Object value = getAccessors(sobj).getter;
         return (value instanceof ScriptFunction) ? (ScriptFunction)value : null;
     }

     @Override
     public MethodHandle getSetter(final Class<?> type, final PropertyMap currentMap) {
         if (type == int.class) {
             return INVOKE_INT_SETTER;
         } else if (type == double.class) {
             return INVOKE_NUMBER_SETTER;
         } else {
             assert type == Object.class;
             return INVOKE_OBJECT_SETTER;
         }
     }

     @Override
     public ScriptFunction getSetterFunction(final ScriptObject sobj) {
         final Object value = getAccessors(sobj).setter;
         return (value instanceof ScriptFunction) ? (ScriptFunction)value : null;
     }

     /**
      * Get the getter for the {@code Accessors} object.
      * This is the the super {@code Object} type getter with {@code Accessors} return type.
      *
      * @return The getter handle for the Accessors
      */
     MethodHandle getAccessorsGetter() {
         return super.getGetter(Object.class).asType(MethodType.methodType(Accessors.class, Object.class));
     }

     // User defined getter and setter are always called by "dyn:call". Note that the user
     // getter/setter may be inherited. If so, proto is bound during lookup. In either
     // inherited or self case, slot is also bound during lookup. Actual ScriptFunction
     // to be called is retrieved everytime and applied.
     @SuppressWarnings("unused")
     private static Object invokeObjectGetter(final Accessors gs, final MethodHandle invoker, final Object self) throws Throwable {
         final Object func = gs.getter;
         if (func instanceof ScriptFunction) {
             return invoker.invokeExact(func, self);
         }

         return UNDEFINED;
     }

     @SuppressWarnings("unused")
     private static int invokeIntGetter(final Accessors gs, final MethodHandle invoker, final int programPoint, final Object self) throws Throwable {
         final Object func = gs.getter;
         if (func instanceof ScriptFunction) {
             return (int) invoker.invokeExact(func, self);
         }

         throw new UnwarrantedOptimismException(UNDEFINED, programPoint);
     }

     @SuppressWarnings("unused")
     private static double invokeNumberGetter(final Accessors gs, final MethodHandle invoker, final int programPoint, final Object self) throws Throwable {
         final Object func = gs.getter;
         if (func instanceof ScriptFunction) {
             return (double) invoker.invokeExact(func, self);
         }

         throw new UnwarrantedOptimismException(UNDEFINED, programPoint);
     }

     @SuppressWarnings("unused")
     private static void invokeObjectSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final Object value) throws Throwable {
         final Object func = gs.setter;
         if (func instanceof ScriptFunction) {
             invoker.invokeExact(func, self, value);
         } else if (name != null) {
             throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
         }
     }

     @SuppressWarnings("unused")
     private static void invokeIntSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final int value) throws Throwable {
         final Object func = gs.setter;
         if (func instanceof ScriptFunction) {
             invoker.invokeExact(func, self, value);
         } else if (name != null) {
             throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
         }
     }

     @SuppressWarnings("unused")
     private static void invokeNumberSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final double value) throws Throwable {
         final Object func = gs.setter;
         if (func instanceof ScriptFunction) {
             invoker.invokeExact(func, self, value);
         } else if (name != null) {
             throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
         }
     }

     private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
         return MH.findStatic(LOOKUP, UserAccessorProperty.class, name, MH.type(rtype, types));
     }

 }
	/*
	* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package jdk.nashorn.internal.runtime;
	import static jdk.nashorn.internal.lookup.Lookup.MH;
	import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
	import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
	import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
	import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.CALLSITE_PROGRAM_POINT_SHIFT;

	import java.lang.invoke.MethodHandle;
	import java.lang.invoke.MethodHandles;
	import java.lang.invoke.MethodType;
	import java.util.concurrent.Callable;
	import jdk.nashorn.internal.lookup.Lookup;
	import jdk.nashorn.internal.runtime.linker.Bootstrap;
	import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;

	/**
	* Property with user defined getters/setters. Actual getter and setter
	* functions are stored in underlying ScriptObject. Only the 'slot' info is
	* stored in the property.
	*/
	public final class UserAccessorProperty extends SpillProperty {

	private static final long serialVersionUID = -5928687246526840321L;

	static final class Accessors {
	Object getter;
	Object setter;

	Accessors(final Object getter, final Object setter) {
	set(getter, setter);
	}

	final void set(final Object getter, final Object setter) {
	this.getter = getter;
	this.setter = setter;
	}

	@Override
	public String toString() {
	return "[getter=" + getter + " setter=" + setter + ']';
	}
	}

	private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();

	/** Getter method handle */
	private final static MethodHandle INVOKE_OBJECT_GETTER = findOwnMH_S("invokeObjectGetter", Object.class, Accessors.class, MethodHandle.class, Object.class);
	private final static MethodHandle INVOKE_INT_GETTER = findOwnMH_S("invokeIntGetter", int.class, Accessors.class, MethodHandle.class, int.class, Object.class);
	private final static MethodHandle INVOKE_NUMBER_GETTER = findOwnMH_S("invokeNumberGetter", double.class, Accessors.class, MethodHandle.class, int.class, Object.class);

	/** Setter method handle */
	private final static MethodHandle INVOKE_OBJECT_SETTER = findOwnMH_S("invokeObjectSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, Object.class);
	private final static MethodHandle INVOKE_INT_SETTER = findOwnMH_S("invokeIntSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, int.class);
	private final static MethodHandle INVOKE_NUMBER_SETTER = findOwnMH_S("invokeNumberSetter", void.class, Accessors.class, MethodHandle.class, String.class, Object.class, double.class);

	private static final Object OBJECT_GETTER_INVOKER_KEY = new Object();
	private static MethodHandle getObjectGetterInvoker() {
	return Context.getGlobal().getDynamicInvoker(OBJECT_GETTER_INVOKER_KEY, new Callable<MethodHandle>() {
	@Override
	public MethodHandle call() throws Exception {
	return getINVOKE_UA_GETTER(Object.class, INVALID_PROGRAM_POINT);
	}
	});
	}

	static MethodHandle getINVOKE_UA_GETTER(final Class<?> returnType, final int programPoint) {
	if (UnwarrantedOptimismException.isValid(programPoint)) {
	final int flags = NashornCallSiteDescriptor.CALLSITE_OPTIMISTIC \| programPoint << CALLSITE_PROGRAM_POINT_SHIFT;
	return Bootstrap.createDynamicInvoker("dyn:call", flags, returnType, Object.class, Object.class);
	} else {
	return Bootstrap.createDynamicInvoker("dyn:call", Object.class, Object.class, Object.class);
	}
	}

	private static final Object OBJECT_SETTER_INVOKER_KEY = new Object();
	private static MethodHandle getObjectSetterInvoker() {
	return Context.getGlobal().getDynamicInvoker(OBJECT_SETTER_INVOKER_KEY, new Callable<MethodHandle>() {
	@Override
	public MethodHandle call() throws Exception {
	return getINVOKE_UA_SETTER(Object.class);
	}
	});
	}

	static MethodHandle getINVOKE_UA_SETTER(final Class<?> valueType) {
	return Bootstrap.createDynamicInvoker("dyn:call", void.class, Object.class, Object.class, valueType);
	}

	/**
	* Constructor
	*
	* @param key property key
	* @param flags property flags
	* @param slot spill slot
	*/
	UserAccessorProperty(final String key, final int flags, final int slot) {
	super(key, flags, slot);
	}

	private UserAccessorProperty(final UserAccessorProperty property) {
	super(property);
	}

	private UserAccessorProperty(final UserAccessorProperty property, final Class<?> newType) {
	super(property, newType);
	}

	@Override
	public Property copy() {
	return new UserAccessorProperty(this);
	}

	@Override
	public Property copy(final Class<?> newType) {
	return new UserAccessorProperty(this, newType);
	}

	void setAccessors(final ScriptObject sobj, final PropertyMap map, final Accessors gs) {
	try {
	//invoke the getter and find out
	super.getSetter(Object.class, map).invokeExact((Object)sobj, (Object)gs);
	} catch (final Error \| RuntimeException t) {
	throw t;
	} catch (final Throwable t) {
	throw new RuntimeException(t);
	}
	}

	//pick the getter setter out of the correct spill slot in sobj
	Accessors getAccessors(final ScriptObject sobj) {
	try {
	//invoke the super getter with this spill slot
	//get the getter setter from the correct spill slot
	final Object gs = super.getGetter(Object.class).invokeExact((Object)sobj);
	return (Accessors)gs;
	} catch (final Error \| RuntimeException t) {
	throw t;
	} catch (final Throwable t) {
	throw new RuntimeException(t);
	}
	}

	@Override
	protected Class<?> getLocalType() {
	return Object.class;
	}

	@Override
	public boolean hasGetterFunction(final ScriptObject sobj) {
	return getAccessors(sobj).getter != null;
	}

	@Override
	public boolean hasSetterFunction(final ScriptObject sobj) {
	return getAccessors(sobj).setter != null;
	}

	@Override
	public int getIntValue(final ScriptObject self, final ScriptObject owner) {
	return (int)getObjectValue(self, owner);
	}

	@Override
	public double getDoubleValue(final ScriptObject self, final ScriptObject owner) {
	return (double)getObjectValue(self, owner);
	}

	@Override
	public Object getObjectValue(final ScriptObject self, final ScriptObject owner) {
	try {
	return invokeObjectGetter(getAccessors((owner != null) ? owner : self), getObjectGetterInvoker(), self);
	} catch (final Error \| RuntimeException t) {
	throw t;
	} catch (final Throwable t) {
	throw new RuntimeException(t);
	}
	}

	@Override
	public void setValue(final ScriptObject self, final ScriptObject owner, final int value, final boolean strict) {
	setValue(self, owner, (Object) value, strict);
	}

	@Override
	public void setValue(final ScriptObject self, final ScriptObject owner, final double value, final boolean strict) {
	setValue(self, owner, (Object) value, strict);
	}

	@Override
	public void setValue(final ScriptObject self, final ScriptObject owner, final Object value, final boolean strict) {
	try {
	invokeObjectSetter(getAccessors((owner != null) ? owner : self), getObjectSetterInvoker(), strict ? getKey() : null, self, value);
	} catch (final Error \| RuntimeException t) {
	throw t;
	} catch (final Throwable t) {
	throw new RuntimeException(t);
	}
	}

	@Override
	public MethodHandle getGetter(final Class<?> type) {
	//this returns a getter on the format (Accessors, Object receiver)
	return Lookup.filterReturnType(INVOKE_OBJECT_GETTER, type);
	}

	@Override
	public MethodHandle getOptimisticGetter(final Class<?> type, final int programPoint) {
	if (type == int.class) {
	return INVOKE_INT_GETTER;
	} else if (type == double.class) {
	return INVOKE_NUMBER_GETTER;
	} else {
	assert type == Object.class;
	return INVOKE_OBJECT_GETTER;
	}
	}

	@Override
	void initMethodHandles(final Class<?> structure) {
	throw new UnsupportedOperationException();
	}

	@Override
	public ScriptFunction getGetterFunction(final ScriptObject sobj) {
	final Object value = getAccessors(sobj).getter;
	return (value instanceof ScriptFunction) ? (ScriptFunction)value : null;
	}

	@Override
	public MethodHandle getSetter(final Class<?> type, final PropertyMap currentMap) {
	if (type == int.class) {
	return INVOKE_INT_SETTER;
	} else if (type == double.class) {
	return INVOKE_NUMBER_SETTER;
	} else {
	assert type == Object.class;
	return INVOKE_OBJECT_SETTER;
	}
	}

	@Override
	public ScriptFunction getSetterFunction(final ScriptObject sobj) {
	final Object value = getAccessors(sobj).setter;
	return (value instanceof ScriptFunction) ? (ScriptFunction)value : null;
	}

	/**
	* Get the getter for the {@code Accessors} object.
	* This is the the super {@code Object} type getter with {@code Accessors} return type.
	*
	* @return The getter handle for the Accessors
	*/
	MethodHandle getAccessorsGetter() {
	return super.getGetter(Object.class).asType(MethodType.methodType(Accessors.class, Object.class));
	}

	// User defined getter and setter are always called by "dyn:call". Note that the user
	// getter/setter may be inherited. If so, proto is bound during lookup. In either
	// inherited or self case, slot is also bound during lookup. Actual ScriptFunction
	// to be called is retrieved everytime and applied.
	@SuppressWarnings("unused")
	private static Object invokeObjectGetter(final Accessors gs, final MethodHandle invoker, final Object self) throws Throwable {
	final Object func = gs.getter;
	if (func instanceof ScriptFunction) {
	return invoker.invokeExact(func, self);
	}

	return UNDEFINED;
	}

	@SuppressWarnings("unused")
	private static int invokeIntGetter(final Accessors gs, final MethodHandle invoker, final int programPoint, final Object self) throws Throwable {
	final Object func = gs.getter;
	if (func instanceof ScriptFunction) {
	return (int) invoker.invokeExact(func, self);
	}

	throw new UnwarrantedOptimismException(UNDEFINED, programPoint);
	}

	@SuppressWarnings("unused")
	private static double invokeNumberGetter(final Accessors gs, final MethodHandle invoker, final int programPoint, final Object self) throws Throwable {
	final Object func = gs.getter;
	if (func instanceof ScriptFunction) {
	return (double) invoker.invokeExact(func, self);
	}

	throw new UnwarrantedOptimismException(UNDEFINED, programPoint);
	}

	@SuppressWarnings("unused")
	private static void invokeObjectSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final Object value) throws Throwable {
	final Object func = gs.setter;
	if (func instanceof ScriptFunction) {
	invoker.invokeExact(func, self, value);
	} else if (name != null) {
	throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
	}
	}

	@SuppressWarnings("unused")
	private static void invokeIntSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final int value) throws Throwable {
	final Object func = gs.setter;
	if (func instanceof ScriptFunction) {
	invoker.invokeExact(func, self, value);
	} else if (name != null) {
	throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
	}
	}

	@SuppressWarnings("unused")
	private static void invokeNumberSetter(final Accessors gs, final MethodHandle invoker, final String name, final Object self, final double value) throws Throwable {
	final Object func = gs.setter;
	if (func instanceof ScriptFunction) {
	invoker.invokeExact(func, self, value);
	} else if (name != null) {
	throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
	}
	}

	private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
	return MH.findStatic(LOOKUP, UserAccessorProperty.class, name, MH.type(rtype, types));
	}

	}