134 lines
4.8 KiB
Java
134 lines
4.8 KiB
Java
/*
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* Copyright (c) 2010, 2019, 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.
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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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/*
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* @test
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* @bug 8235541
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* @summary Test that the binding variable kind is appropriately set
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* @library /tools/javac/lib
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* @modules jdk.compiler
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* @build JavacTestingAbstractProcessor
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* @compile TestBindingVariable.java
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* @compile --enable-preview -source ${jdk.version} -processor TestBindingVariable -proc:only TestBindingVariableData.java
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*/
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import javax.annotation.processing.*;
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import javax.lang.model.element.*;
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import javax.lang.model.util.*;
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import java.util.*;
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import com.sun.source.tree.*;
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import com.sun.source.util.*;
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/**
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* Using the tree API, retrieve element representations of the
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* binding variables of the type test pattern, and verify their kind
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* tags are set appropriately.
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*/
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public class TestBindingVariable extends JavacTestingAbstractProcessor implements AutoCloseable {
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int bindingVariableCount = 0;
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public boolean process(Set<? extends TypeElement> annotations,
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RoundEnvironment roundEnv) {
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if (!roundEnv.processingOver()) {
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Trees trees = Trees.instance(processingEnv);
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for(Element rootElement : roundEnv.getRootElements()) {
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TreePath treePath = trees.getPath(rootElement);
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(new BindingVariableScanner(trees)).
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scan(treePath.getCompilationUnit(), null);
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}
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if (bindingVariableCount != 2)
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throw new RuntimeException("Bad binding variable count " +
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bindingVariableCount);
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}
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return true;
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}
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@Override
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public void close() {}
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/**
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* Verify that a binding variable modeled as an element behaves
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* as expected under 6 and latest specific visitors.
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*/
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private static void testBindingVariable(Element element) {
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ElementVisitor visitor6 = new ElementKindVisitor6<Void, Void>() {};
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try {
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visitor6.visit(element);
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throw new RuntimeException("Expected UnknownElementException not thrown.");
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} catch (UnknownElementException uee) {
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; // Expected.
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}
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ElementKindVisitor visitorLatest =
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new ElementKindVisitor<Object, Void>() {
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@Override
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public Object visitVariableAsBindingVariable(VariableElement e,
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Void p) {
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return e; // a non-null value
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}
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};
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if (visitorLatest.visit(element) == null) {
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throw new RuntimeException("Null result of resource variable visitation.");
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}
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}
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class BindingVariableScanner extends TreePathScanner<Void, Void> {
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private Trees trees;
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public BindingVariableScanner(Trees trees) {
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super();
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this.trees = trees;
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}
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@Override
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public Void visitBindingPattern(BindingPatternTree node, Void p) {
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handleTreeAsBindingVar(new TreePath(getCurrentPath(), node.getVariable()));
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return super.visitBindingPattern(node, p);
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}
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@Override
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public Void visitIdentifier(IdentifierTree node, Void p) {
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if (node.getName().contentEquals("bindingVar")) {
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handleTreeAsBindingVar(getCurrentPath());
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}
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return super.visitIdentifier(node, p);
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}
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private void handleTreeAsBindingVar(TreePath tp) {
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Element element = trees.getElement(tp);
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System.out.println("Name: " + element.getSimpleName() +
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"\tKind: " + element.getKind());
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if (element.getKind() != ElementKind.BINDING_VARIABLE) {
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throw new RuntimeException("Expected a binding variable, but got: " +
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element.getKind());
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}
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testBindingVariable(element);
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bindingVariableCount++;
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}
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}
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}
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