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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2013, 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. 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 com.oracle.truffle.object;
import java.util.Objects;
import com.oracle.truffle.api.object.ObjectType;
import com.oracle.truffle.api.object.Property;
/** @since 0.17 or earlier */
public abstract class Transition {
/**
* @since 0.17 or earlier
*/
protected Transition() {
}
/** @since 0.17 or earlier */
@Override
public int hashCode() {
int result = 1;
return result;
}
/** @since 0.17 or earlier */
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
return true;
}
/** @since 0.17 or earlier */
public abstract boolean isDirect();
/** @since 0.17 or earlier */
public abstract static class PropertyTransition extends Transition {
private final Property property;
/** @since 0.17 or earlier */
public PropertyTransition(Property property) {
this.property = property;
}
/** @since 0.17 or earlier */
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + ((property == null) ? 0 : property.hashCode());
return result;
}
/** @since 0.17 or earlier */
@Override
public boolean equals(Object obj) {
if (!super.equals(obj)) {
return false;
}
PropertyTransition other = (PropertyTransition) obj;
if (!Objects.equals(property, other.property)) {
return false;
}
return true;
}
/** @since 0.17 or earlier */
public Property getProperty() {
return property;
}
}
/** @since 0.17 or earlier */
public static final class AddPropertyTransition extends PropertyTransition {
/** @since 0.17 or earlier */
public AddPropertyTransition(Property property) {
super(property);
}
/** @since 0.17 or earlier */
@Override
public boolean isDirect() {
return true;
}
/** @since 0.17 or earlier */
@Override
public String toString() {
return String.format("add(%s)", getProperty());
}
}
/** @since 0.17 or earlier */
public static final class RemovePropertyTransition extends PropertyTransition {
/** @since 0.17 or earlier */
public RemovePropertyTransition(Property property) {
super(property);
}
/** @since 0.17 or earlier */
@Override
public boolean isDirect() {
return false;
}
/** @since 0.17 or earlier */
@Override
public String toString() {
return String.format("remove(%s)", getProperty());
}
}
/** @since 0.17 or earlier */
public static final class ObjectTypeTransition extends Transition {
private final ObjectType objectType;
/** @since 0.17 or earlier */
public ObjectTypeTransition(ObjectType objectType) {
this.objectType = objectType;
}
/** @since 0.17 or earlier */
public ObjectType getObjectType() {
return objectType;
}
/** @since 0.17 or earlier */
@Override
public boolean equals(Object other) {
return super.equals(other) && Objects.equals(objectType, ((ObjectTypeTransition) other).objectType);
}
/** @since 0.17 or earlier */
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + ((objectType == null) ? 0 : objectType.hashCode());
return result;
}
/** @since 0.17 or earlier */
@Override
public boolean isDirect() {
return true;
}
/** @since 0.17 or earlier */
@Override
public String toString() {
return String.format("objectType(%s)", getObjectType());
}
}
/** @since 0.17 or earlier */
public abstract static class AbstractReplacePropertyTransition extends PropertyTransition {
private final Property after;
/** @since 0.17 or earlier */
public AbstractReplacePropertyTransition(Property before, Property after) {
super(before);
this.after = after;
}
/** @since 0.17 or earlier */
public Property getPropertyBefore() {
return this.getProperty();
}
/** @since 0.17 or earlier */
public Property getPropertyAfter() {
return after;
}
/** @since 0.17 or earlier */
@Override
public boolean equals(Object obj) {
return super.equals(obj) && this.after.equals(((AbstractReplacePropertyTransition) obj).after);
}
/** @since 0.17 or earlier */
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + after.hashCode();
return result;
}
/** @since 0.17 or earlier */
@Override
public String toString() {
return String.format("replace(%s,%s)", getPropertyBefore(), getPropertyAfter());
}
}
/** @since 0.17 or earlier */
public static final class IndirectReplacePropertyTransition extends AbstractReplacePropertyTransition {
/** @since 0.17 or earlier */
public IndirectReplacePropertyTransition(Property before, Property after) {
super(before, after);
}
/** @since 0.17 or earlier */
@Override
public boolean isDirect() {
return false;
}
}
/** @since 0.17 or earlier */
public static final class DirectReplacePropertyTransition extends AbstractReplacePropertyTransition {
/** @since 0.17 or earlier */
public DirectReplacePropertyTransition(Property before, Property after) {
super(before, after);
}
/** @since 0.17 or earlier */
@Override
public boolean isDirect() {
return true;
}
}
/** @since 0.17 or earlier */
public static final class ReservePrimitiveArrayTransition extends Transition {
/** @since 0.17 or earlier */
public ReservePrimitiveArrayTransition() {
}
/** @since 0.17 or earlier */
@Override
public boolean isDirect() {
return true;
}
}
/** @since 0.18 */
public static final class ShareShapeTransition extends Transition {
/** @since 0.18 */
public ShareShapeTransition() {
}
/** @since 0.18 */
@Override
public boolean isDirect() {
return true;
}
}
}
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