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/*
* Copyright (c) 2025, 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.
*/
/*
* @test
* @bug 8348212 8349475
* @summary Ensure the warn() phase executes when the compiler is invoked via the API
* @modules jdk.compiler/com.sun.tools.javac.api
*/
import com.sun.tools.javac.api.JavacTaskImpl;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.List;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
public class TestJavacTaskWithWarning {
static final JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
static final StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null);
public static void warningTest() throws Exception {
// Create a source file that will generate a warning
String srcdir = ".";
File file = new File(srcdir, "GeneratesWarning.java");
try (PrintStream out = new PrintStream(new FileOutputStream(file))) {
out.print(
"""
public class GeneratesWarning {
public GeneratesWarning() {
hashCode(); // generates a "this-escape" warning
}
}
""");
}
// Compile it using API
Iterable<? extends JavaFileObject> files = fm.getJavaFileObjectsFromFiles(List.of(file));
StringWriter buf = new StringWriter();
List<String> options = List.of(
"-Xlint:this-escape",
"-XDrawDiagnostics"
);
JavacTaskImpl task = (JavacTaskImpl)compiler.getTask(new PrintWriter(buf), fm, null, options, null, files);
task.analyze();
// Verify warning was generated
if (!buf.toString().contains("compiler.warn.possible.this.escape"))
throw new AssertionError("warning not found in:\n" + buf);
}
public static void main(String[] args) throws Exception {
try {
warningTest();
} finally {
fm.close();
}
}
}
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