Java example source code file (TestEvalExpression.java)

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Java - Java tags/keywords

arraylist, assertionerror, diagnosticlistener, exception, gui, javacompiler, javafileobject, listener, object, reflection, string, swing, testevalexpression, util, xlint\:all

The TestEvalExpression.java Java example source code

/*
 * Copyright (c) 2005, 2006, 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     4164450
 * @summary JSR 199: Standard interface for Java compilers
 * @author  Peter von der Ah\u00e9
 * @compile TestEvalExpression.java evalexpr/ByteArrayClassLoader.java  evalexpr/CompileFromString.java  evalexpr/MemoryFileManager.java
 * @run main TestEvalExpression
 */

import java.lang.reflect.Method;
import java.util.*;
import javax.swing.JOptionPane;
import javax.tools.*;
import static evalexpr.CompileFromString.*;

public class TestEvalExpression {
    static int errorCount = 0;
    static class Listener implements DiagnosticListener<JavaFileObject> {
        public void report(Diagnostic<? extends JavaFileObject> message) {
            if (message.getKind() == Diagnostic.Kind.ERROR)
                errorCount++;
            System.err.println(message);
        }
    }

    public static void main(String[] args) {
        // Get a compiler tool
        final JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
        final List<String> compilerFlags = new ArrayList();
        compilerFlags.add("-Xlint:all"); // report all warnings
        compilerFlags.add("-g:none"); // don't generate debug info
        final DiagnosticListener<JavaFileObject> listener = new Listener();
        String expression = "System.getProperty(\"java.vendor\")";
        Object result = null;
        try {
            result = evalExpression(compiler, listener, compilerFlags, expression);
        } catch (Exception e) {
            throw new AssertionError(e);
        }
        if (result == ERROR)
            throw new AssertionError(result);
        System.out.format("%s => %s%n", expression, result);
        if (!System.getProperty("java.vendor").equals(result))
            throw new AssertionError(result);
        if (errorCount != 0)
            throw new AssertionError(errorCount);
        try {
            result = evalExpression(compiler, listener, compilerFlags, "fisk hest");
        } catch (Exception e) {
            throw new AssertionError(e);
        }
        if (errorCount == 0)
            throw new AssertionError(errorCount);
    }
}