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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2015, 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
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*/
package com.oracle.truffle.api.interop.java;
import java.util.List;
import java.util.Map;
import com.oracle.truffle.api.CompilerAsserts;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.TruffleOptions;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.ForeignAccess;
import com.oracle.truffle.api.interop.InteropException;
import com.oracle.truffle.api.interop.Message;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
abstract class ToJavaNode extends Node {
@Child private Node isExecutable = Message.IS_EXECUTABLE.createNode();
@Child private ToPrimitiveNode primitive = ToPrimitiveNode.create();
public abstract Object execute(Object value, TypeAndClass type);
@Specialization(guards = "operand == null")
@SuppressWarnings("unused")
protected Object doNull(Object operand, TypeAndClass type) {
return null;
}
@Specialization(guards = {"operand != null", "operand.getClass() == cachedOperandType", "targetType == cachedTargetType"})
protected Object doCached(Object operand, @SuppressWarnings("unused") TypeAndClass targetType,
@Cached("operand.getClass()") Class cachedOperandType,
@Cached("targetType") TypeAndClass cachedTargetType) {
return convertImpl(cachedOperandType.cast(operand), cachedTargetType);
}
private Object convertImpl(Object value, TypeAndClass targetType) {
Object convertedValue;
if (isPrimitiveType(targetType.clazz)) {
convertedValue = primitive.toPrimitive(value, targetType.clazz);
if (convertedValue != null) {
return convertedValue;
}
}
if (JavaObject.isJavaInstance(targetType.clazz, value)) {
convertedValue = JavaObject.valueOf(value);
} else if (!TruffleOptions.AOT && value instanceof TruffleObject && JavaInterop.isJavaFunctionInterface(targetType.clazz) && isExecutable((TruffleObject) value)) {
convertedValue = JavaInteropReflect.asJavaFunction(targetType.clazz, (TruffleObject) value);
} else if (value == JavaObject.NULL) {
return null;
} else if (value instanceof TruffleObject) {
boolean hasSize = primitive.hasSize((TruffleObject) value);
boolean isNull = primitive.isNull((TruffleObject) value);
convertedValue = asJavaObject(targetType.clazz, targetType, (TruffleObject) value, hasSize, isNull);
} else {
assert targetType.clazz.isAssignableFrom(value.getClass()) : value.getClass().getName() + " is not assignable to " + targetType;
convertedValue = value;
}
return convertedValue;
}
@Specialization(guards = "operand != null", replaces = "doCached")
@TruffleBoundary
protected Object doGeneric(Object operand, TypeAndClass type) {
return convertImpl(operand, type);
}
private static boolean isPrimitiveType(Class clazz) {
return clazz == int.class || clazz == Integer.class ||
clazz == boolean.class || clazz == Boolean.class ||
clazz == byte.class || clazz == Byte.class ||
clazz == short.class || clazz == Short.class ||
clazz == long.class || clazz == Long.class ||
clazz == float.class || clazz == Float.class ||
clazz == double.class || clazz == Double.class ||
clazz == char.class || clazz == Character.class ||
clazz == Number.class ||
CharSequence.class.isAssignableFrom(clazz);
}
private boolean isExecutable(TruffleObject object) {
return ForeignAccess.sendIsExecutable(isExecutable, object);
}
@TruffleBoundary
private static T asJavaObject(Class clazz, TypeAndClass type, TruffleObject foreignObject, boolean hasSize, boolean isNull) {
Object obj;
if (foreignObject == null) {
return null;
}
if (isNull) {
return null;
}
if (clazz.isInstance(foreignObject)) {
obj = foreignObject;
} else {
if (!clazz.isInterface()) {
throw new ClassCastException();
}
if (clazz == List.class && hasSize) {
TypeAndClass elementType = type.getParameterType(0);
obj = TruffleList.create(elementType, foreignObject);
} else if (clazz == Map.class) {
TypeAndClass keyType = type.getParameterType(0);
TypeAndClass valueType = type.getParameterType(1);
obj = TruffleMap.create(keyType, valueType, foreignObject);
} else {
if (!TruffleOptions.AOT) {
obj = JavaInteropReflect.newProxyInstance(clazz, foreignObject);
} else {
obj = foreignObject;
}
}
}
return clazz.cast(obj);
}
static final class TemporaryRoot extends RootNode {
@Node.Child private Node foreignAccess;
@Node.Child private ToJavaNode toJava;
TemporaryRoot(Node foreignAccess) {
super(null);
this.foreignAccess = foreignAccess;
this.toJava = ToJavaNodeGen.create();
}
@Override
public Object execute(VirtualFrame frame) {
TruffleObject function = (TruffleObject) frame.getArguments()[0];
TypeAndClass type = (TypeAndClass) frame.getArguments()[1];
Object[] args = (Object[]) frame.getArguments()[2];
return call(function, args, type);
}
Object call(TruffleObject function, Object[] args, TypeAndClass type) {
Object raw;
try {
raw = ForeignAccess.send(foreignAccess, function, args);
} catch (InteropException ex) {
CompilerDirectives.transferToInterpreter();
throw ex.raise();
}
if (type == null) {
return raw;
}
Object real = JavaInterop.ACCESSOR.engine().findOriginalObject(raw);
return toJava.execute(real, type);
}
}
@TruffleBoundary
static Object toJava(Object ret, TypeAndClass type) {
CompilerAsserts.neverPartOfCompilation();
Class retType = type.clazz;
final ToPrimitiveNode primitiveNode = ToPrimitiveNode.temporary();
Object primitiveRet = primitiveNode.toPrimitive(ret, retType);
if (primitiveRet != null) {
return primitiveRet;
}
if (ret instanceof TruffleObject) {
if (ToPrimitiveNode.temporary().isNull((TruffleObject) ret)) {
return null;
}
}
if (retType.isInstance(ret)) {
return ret;
}
if (ret instanceof TruffleObject) {
final TruffleObject truffleObject = (TruffleObject) ret;
if (retType.isInterface()) {
return asJavaObject(retType, type, truffleObject, primitiveNode.hasSize(truffleObject), primitiveNode.isNull(truffleObject));
}
}
return ret;
}
}
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