d4be9a13c8
Add type-checking support for default methods as per Featherweight-Defender document Reviewed-by: jjg, dlsmith
127 lines
3.6 KiB
Java
127 lines
3.6 KiB
Java
/*
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package shapegen;
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import shapegen.ClassCase.Kind;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Set;
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import static shapegen.ClassCase.Kind.*;
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/**
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* Type Template Node
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*
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* @author Robert Field
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*/
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public class TTNode {
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final List<TTNode> supertypes;
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final boolean canBeClass;
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private int currentKindIndex;
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private Kind[] kinds;
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public TTNode(List<TTNode> subtypes, boolean canBeClass) {
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this.supertypes = subtypes;
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this.canBeClass = canBeClass;
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}
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public void start(boolean includeClasses) {
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kinds =
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supertypes.isEmpty()?
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(new Kind[]{IDEFAULT, IPRESENT})
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: ((includeClasses && canBeClass)?
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new Kind[]{CNONE, IVAC, IDEFAULT, IPRESENT}
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: new Kind[]{IVAC, IDEFAULT, IPRESENT});
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currentKindIndex = 0;
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for (TTNode sub : supertypes) {
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sub.start(includeClasses);
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}
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}
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public boolean next() {
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++currentKindIndex;
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if (currentKindIndex >= kinds.length) {
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currentKindIndex = 0;
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return false;
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} else {
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return true;
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}
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}
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public void collectAllSubtypes(Set<TTNode> subs) {
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subs.add(this);
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for (TTNode n : supertypes) {
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n.collectAllSubtypes(subs);
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}
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}
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private Kind getKind() {
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return kinds[currentKindIndex];
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}
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boolean isInterface() {
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return getKind().isInterface;
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}
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boolean isClass() {
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return !isInterface();
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}
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boolean hasDefault() {
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return getKind() == IDEFAULT;
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}
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public boolean isValid() {
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for (TTNode n : supertypes) {
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if (!n.isValid() || (isInterface() && n.isClass())) {
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return false;
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}
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}
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return true;
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}
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public ClassCase genCase() {
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ClassCase subclass;
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List<TTNode> ttintfs;
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if (isClass() && !supertypes.isEmpty() && supertypes.get(0).isClass()) {
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subclass = supertypes.get(0).genCase();
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ttintfs = supertypes.subList(1, supertypes.size());
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} else {
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subclass = null;
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ttintfs = supertypes;
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}
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List<ClassCase> intfs = new ArrayList<>();
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for (TTNode node : ttintfs) {
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intfs.add(node.genCase());
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}
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return new ClassCase(getKind(), subclass, intfs);
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}
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}
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