| /* |
| * Copyright (c) 2015, 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 jdk.jshell; |
| |
| import com.sun.source.tree.ClassTree; |
| import com.sun.source.tree.IdentifierTree; |
| import com.sun.source.tree.ImportTree; |
| import com.sun.source.tree.MemberSelectTree; |
| import com.sun.source.tree.MethodTree; |
| import com.sun.source.tree.PackageTree; |
| import com.sun.source.tree.Tree; |
| import com.sun.source.tree.VariableTree; |
| import com.sun.source.util.TreeScanner; |
| import com.sun.tools.javac.util.DefinedBy; |
| import com.sun.tools.javac.util.DefinedBy.Api; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Set; |
| import javax.lang.model.element.Name; |
| |
| /** |
| * Search a compiler API parse tree for dependencies. |
| */ |
| class TreeDependencyScanner extends TreeScanner<Void, Set<String>> { |
| |
| private final Set<String> decl = new HashSet<>(); |
| private final Set<String> body = new HashSet<>(); |
| |
| public void scan(Tree node) { |
| scan(node, decl); |
| } |
| |
| public Collection<String> declareReferences() { |
| return decl; |
| } |
| |
| public Collection<String> bodyReferences() { |
| return body; |
| } |
| |
| private void add(Set<String> p, Name name) { |
| p.add(name.toString()); |
| } |
| |
| // -- Differentiate declaration references from body references --- |
| |
| @Override @DefinedBy(Api.COMPILER_TREE) |
| public Void visitClass(ClassTree node, Set<String> p) { |
| scan(node.getModifiers(), p); |
| scan(node.getTypeParameters(), p); |
| scan(node.getExtendsClause(), p); |
| scan(node.getImplementsClause(), p); |
| scan(node.getMembers(), body); |
| return null; |
| } |
| |
| @Override @DefinedBy(Api.COMPILER_TREE) |
| public Void visitMethod(MethodTree node, Set<String> p) { |
| scan(node.getModifiers(), p); |
| scan(node.getReturnType(), p); |
| scan(node.getTypeParameters(), p); |
| scan(node.getParameters(), p); |
| scan(node.getReceiverParameter(), p); |
| scan(node.getThrows(), p); |
| scan(node.getBody(), body); |
| scan(node.getDefaultValue(), body); |
| return null; |
| } |
| |
| @Override @DefinedBy(Api.COMPILER_TREE) |
| public Void visitVariable(VariableTree node, Set<String> p) { |
| scan(node.getModifiers(), p); |
| scan(node.getType(), p); |
| scan(node.getNameExpression(), p); |
| scan(node.getInitializer(), body); |
| return null; |
| } |
| |
| // --- Ignore these --- |
| |
| @Override @DefinedBy(Api.COMPILER_TREE) |
| public Void visitPackage(PackageTree node, Set<String> p) { |
| return null; |
| } |
| |
| @Override @DefinedBy(Api.COMPILER_TREE) |
| public Void visitImport(ImportTree node, Set<String> p) { |
| return null; |
| } |
| |
| |
| // -- Actual Symbol names --- |
| |
| @Override @DefinedBy(Api.COMPILER_TREE) |
| public Void visitMemberSelect(MemberSelectTree node, Set<String> p) { |
| add(p, node.getIdentifier()); |
| return super.visitMemberSelect(node, p); |
| } |
| |
| @Override @DefinedBy(Api.COMPILER_TREE) |
| public Void visitIdentifier(IdentifierTree node, Set<String> p) { |
| add(p, node.getName()); |
| return super.visitIdentifier(node, p); |
| } |
| } |