view truffle/com.oracle.truffle.object/src/com/oracle/truffle/object/Transition.java @ 22404:23d2b5513c83

Fixing API error: GraphPrintVisitor shouldn't expose internal API class in an API method. When at it deprecating all protected methods, as GraphPrintVisitor usages don't indicate somebody should be subclassing it at all.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Fri, 20 Nov 2015 17:27:42 +0100
parents 1b48778cee21
children
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/*
 * Copyright (c) 2013, 2014, 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 com.oracle.truffle.object;

import java.util.Objects;

import com.oracle.truffle.api.object.ObjectType;
import com.oracle.truffle.api.object.Property;

public abstract class Transition {
    @Override
    public int hashCode() {
        int result = 1;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        return true;
    }

    public abstract boolean isDirect();

    public abstract static class PropertyTransition extends Transition {
        private final Property property;

        public PropertyTransition(Property property) {
            this.property = property;
        }

        @Override
        public int hashCode() {
            final int prime = 31;
            int result = super.hashCode();
            result = prime * result + ((property == null) ? 0 : property.hashCode());
            return result;
        }

        @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;
        }

        public Property getProperty() {
            return property;
        }
    }

    public static final class AddPropertyTransition extends PropertyTransition {
        public AddPropertyTransition(Property property) {
            super(property);
        }

        @Override
        public boolean isDirect() {
            return true;
        }

        @Override
        public String toString() {
            return String.format("add(%s)", getProperty());
        }
    }

    public static final class RemovePropertyTransition extends PropertyTransition {
        public RemovePropertyTransition(Property property) {
            super(property);
        }

        @Override
        public boolean isDirect() {
            return false;
        }

        @Override
        public String toString() {
            return String.format("remove(%s)", getProperty());
        }
    }

    public static final class ObjectTypeTransition extends Transition {
        private final ObjectType objectType;

        public ObjectTypeTransition(ObjectType objectType) {
            this.objectType = objectType;
        }

        public ObjectType getObjectType() {
            return objectType;
        }

        @Override
        public boolean equals(Object other) {
            return super.equals(other) && Objects.equals(objectType, ((ObjectTypeTransition) other).objectType);
        }

        @Override
        public int hashCode() {
            final int prime = 31;
            int result = super.hashCode();
            result = prime * result + ((objectType == null) ? 0 : objectType.hashCode());
            return result;
        }

        @Override
        public boolean isDirect() {
            return true;
        }

        @Override
        public String toString() {
            return String.format("objectType(%s)", getObjectType());
        }
    }

    public abstract static class AbstractReplacePropertyTransition extends PropertyTransition {
        private final Property after;

        public AbstractReplacePropertyTransition(Property before, Property after) {
            super(before);
            this.after = after;
        }

        public Property getPropertyBefore() {
            return this.getProperty();
        }

        public Property getPropertyAfter() {
            return after;
        }

        @Override
        public boolean equals(Object obj) {
            return super.equals(obj) && this.after.equals(((AbstractReplacePropertyTransition) obj).after);
        }

        @Override
        public int hashCode() {
            final int prime = 31;
            int result = super.hashCode();
            result = prime * result + after.hashCode();
            return result;
        }

        @Override
        public String toString() {
            return String.format("replace(%s,%s)", getPropertyBefore(), getPropertyAfter());
        }
    }

    public static final class IndirectReplacePropertyTransition extends AbstractReplacePropertyTransition {
        public IndirectReplacePropertyTransition(Property before, Property after) {
            super(before, after);
        }

        @Override
        public boolean isDirect() {
            return false;
        }
    }

    public static final class DirectReplacePropertyTransition extends AbstractReplacePropertyTransition {
        public DirectReplacePropertyTransition(Property before, Property after) {
            super(before, after);
        }

        @Override
        public boolean isDirect() {
            return true;
        }
    }

    public static final class ReservePrimitiveArrayTransition extends Transition {
        public ReservePrimitiveArrayTransition() {
        }

        @Override
        public boolean isDirect() {
            return true;
        }
    }

    public String getShortName() {
        return this.getClass().getSimpleName().replaceFirst("Transition$", "").toLowerCase();
    }
}