92 lines
3.0 KiB
Java
92 lines
3.0 KiB
Java
/*
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* Copyright (c) 2021, 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 8263452
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* @summary Verify javac does not need a long time to process sources with deep class nesting
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* and deep inheritance hierarchies.
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* @modules jdk.compiler
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*/
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import java.util.Arrays;
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import javax.tools.JavaCompiler;
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import javax.tools.ToolProvider;
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import com.sun.source.util.JavacTask;
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import java.io.IOException;
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import java.net.URI;
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import javax.tools.JavaFileObject;
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import javax.tools.SimpleJavaFileObject;
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public class SuperClassAndNesting {
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private static final int SIZE = 100;
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public static void main(String... args) throws IOException {
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new SuperClassAndNesting().run();
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}
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void run() throws IOException {
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compileTestClass(generateTestClass(SIZE));
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}
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String generateTestClass(int depth) {
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StringBuilder clazz = new StringBuilder();
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clazz.append("""
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class Test {
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class T0 extends java.util.ArrayList {
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""");
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for (int i = 1; i < depth; i++) {
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clazz.append("class T" + i + " extends T" + (i - 1) + " {\n");
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}
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for (int i = 0; i < depth; i++) {
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clazz.append("}\n");
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}
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clazz.append("}\n");
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return clazz.toString();
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}
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void compileTestClass(String code) throws IOException {
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final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
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assert tool != null;
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JavacTask ct = (JavacTask) tool.getTask(null, null, null,
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null, null, Arrays.asList(new MyFileObject(code)));
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ct.analyze();
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}
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static class MyFileObject extends SimpleJavaFileObject {
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private final String text;
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public MyFileObject(String text) {
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super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
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this.text = text;
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}
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors) {
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return text;
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}
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}
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} |