/*
 * Copyright (c) 2014, 2018, 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.
 *
 * 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 org.graalvm.compiler.api.replacements;

import java.util.Objects;

import jdk.vm.ci.meta.JavaConstant;
import jdk.vm.ci.meta.JavaKind;
import jdk.vm.ci.meta.ResolvedJavaType;

Reflection operations on values represented as constants for the processing of snippets. Snippets need a direct access to the value of object constants, which is not allowed in other parts of Graal to enforce compiler-VM separation.

This interface must not be used in Graal code that is not related to snippet processing.

/** * Reflection operations on values represented as {@linkplain JavaConstant constants} for the * processing of snippets. Snippets need a direct access to the value of object constants, which is * not allowed in other parts of Graal to enforce compiler-VM separation. * <p> * This interface must not be used in Graal code that is not related to snippet processing. */
public interface SnippetReflectionProvider {
Creates a boxed object constant.
Params:
  • object – the object value to box
Returns:a constant containing object
/** * Creates a boxed {@link JavaKind#Object object} constant. * * @param object the object value to box * @return a constant containing {@code object} */
JavaConstant forObject(Object object);
Gets the object reference a given constant represents if it is of a given type. The constant must have kind JavaKind.Object.
Params:
  • type – the expected type of the object represented by constant. If the object is required to be of this type, then wrap the call to this method in Objects.requireNonNull(Object).
  • constant – an object constant
Returns:the object value represented by constant cast to type if it is an instance of type otherwise null
/** * Gets the object reference a given constant represents if it is of a given type. The constant * must have kind {@link JavaKind#Object}. * * @param type the expected type of the object represented by {@code constant}. If the object is * required to be of this type, then wrap the call to this method in * {@link Objects#requireNonNull(Object)}. * @param constant an object constant * @return the object value represented by {@code constant} cast to {@code type} if it is an * {@link Class#isInstance(Object) instance of} {@code type} otherwise {@code null} */
<T> T asObject(Class<T> type, JavaConstant constant);
Creates a boxed constant for the given kind from an Object. The object needs to be of the Java boxed type corresponding to the kind.
Params:
  • kind – the kind of the constant to create
  • value – the Java boxed value: a Byte instance for JavaKind.Byte, etc.
Returns:the boxed copy of value
/** * Creates a boxed constant for the given kind from an Object. The object needs to be of the * Java boxed type corresponding to the kind. * * @param kind the kind of the constant to create * @param value the Java boxed value: a {@link Byte} instance for {@link JavaKind#Byte}, etc. * @return the boxed copy of {@code value} */
default JavaConstant forBoxed(JavaKind kind, Object value) { if (kind == JavaKind.Object) { return forObject(value); } else { return JavaConstant.forBoxedPrimitive(value); } }
Gets the value to bind to an injected parameter in a node intrinsic.
Params:
  • type – the type of a parameter in a node intrinsic constructor
Returns:the value that should be bound to the parameter when invoking the constructor or null if this provider cannot provide a value of the requested type
/** * Gets the value to bind to an injected parameter in a node intrinsic. * * @param type the type of a parameter in a node intrinsic constructor * @return the value that should be bound to the parameter when invoking the constructor or null * if this provider cannot provide a value of the requested type */
<T> T getInjectedNodeIntrinsicParameter(Class<T> type);
Get the original Java class corresponding to a ResolvedJavaType.
Params:
  • type – the type for which the original Java class is requested
Returns:the original Java class corresponding to type or null if this object cannot map ResolvedJavaType instances to Class instances
/** * Get the original Java class corresponding to a {@link ResolvedJavaType}. * * @param type the type for which the original Java class is requested * @return the original Java class corresponding to {@code type} or {@code null} if this object * cannot map {@link ResolvedJavaType} instances to {@link Class} instances */
Class<?> originalClass(ResolvedJavaType type); }