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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2020, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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*/
package com.oracle.truffle.polyglot;
import java.util.Collection;
import java.util.Objects;
import org.graalvm.collections.EconomicSet;
import org.graalvm.collections.Pair;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Cached.Shared;
import com.oracle.truffle.api.interop.ArityException;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.interop.UnsupportedTypeException;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
/**
* An adapter that provides access to a host adapter's super methods.
*/
@ExportLibrary(InteropLibrary.class)
final class HostAdapterSuperMembers implements TruffleObject {
final HostObject adapter;
HostAdapterSuperMembers(HostObject adapter) {
this.adapter = Objects.requireNonNull(adapter);
}
public Object getAdapter() {
return adapter;
}
static final class NameCache {
@CompilationFinal private Pair cachedNameToSuper;
private static final NameCache UNCACHED = new NameCache(true);
NameCache() {
}
NameCache(boolean uncached) {
if (uncached) {
this.cachedNameToSuper = Pair.empty();
}
}
String getSuperMethodName(String name) {
if (cachedNameToSuper == null) {
CompilerDirectives.transferToInterpreterAndInvalidate();
cachedNameToSuper = Pair.create(name, HostAdapterFactory.getSuperMethodName(name));
}
String cachedName = cachedNameToSuper.getLeft();
if (cachedName != null) {
if (cachedName.equals(name)) {
return cachedNameToSuper.getRight();
} else {
CompilerDirectives.transferToInterpreterAndInvalidate();
cachedNameToSuper = Pair.empty();
return HostAdapterFactory.getSuperMethodName(name);
}
} else {
return HostAdapterFactory.getSuperMethodName(name);
}
}
static NameCache create() {
return new NameCache();
}
static NameCache getUncached() {
return UNCACHED;
}
}
@SuppressWarnings("static-method")
@ExportMessage
boolean hasMembers() {
return true;
}
@ExportMessage
Object readMember(String name,
@Shared("cache") @Cached NameCache cache,
@CachedLibrary("this.adapter") InteropLibrary interop) throws UnsupportedMessageException, UnknownIdentifierException {
String superMethodName = cache.getSuperMethodName(name);
return interop.readMember(getAdapter(), superMethodName);
}
@ExportMessage
Object invokeMember(String name, Object[] args,
@Shared("cache") @Cached NameCache cache,
@CachedLibrary("this.adapter") InteropLibrary interop) throws UnsupportedMessageException, ArityException, UnknownIdentifierException, UnsupportedTypeException {
String superMethodName = cache.getSuperMethodName(name);
return interop.invokeMember(getAdapter(), superMethodName, args);
}
@ExportMessage
boolean isMemberReadable(String name,
@Shared("cache") @Cached NameCache cache,
@CachedLibrary("this.adapter") InteropLibrary interop) {
String superMethodName = cache.getSuperMethodName(name);
return interop.isMemberReadable(getAdapter(), superMethodName);
}
@ExportMessage
boolean isMemberInvocable(String name,
@Shared("cache") @Cached NameCache cache,
@CachedLibrary("this.adapter") InteropLibrary interop) {
String superMethodName = cache.getSuperMethodName(name);
return interop.isMemberInvocable(getAdapter(), superMethodName);
}
@ExportMessage
@TruffleBoundary
Object getMembers(boolean includeInternal) {
return new HostObject.KeysArray(includeInternal ? collectSuperMembers() : new String[0]);
}
@TruffleBoundary
private String[] collectSuperMembers() {
HostClassDesc classDesc = HostClassDesc.forClass(this.adapter.getEngine(), this.adapter.getLookupClass());
EconomicSet names = EconomicSet.create();
Collection methodNames = classDesc.getMethodNames(false, true);
for (String name : methodNames) {
if (name.startsWith(HostAdapterBytecodeGenerator.SUPER_PREFIX)) {
names.add(name.substring(HostAdapterBytecodeGenerator.SUPER_PREFIX.length()));
}
}
return names.toArray(new String[names.size()]);
}
}