Java example source code file (JDKToolFinder.java)

This example Java source code file (JDKToolFinder.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

could, failed, filenotfoundexception, jdktoolfinder, path, runtimeexception, string, system, this, when

The JDKToolFinder.java Java example source code

/*
 * Copyright (c) 2013, 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.
 */

package com.oracle.java.testlibrary;

import java.io.FileNotFoundException;
import java.nio.file.Path;
import java.nio.file.Paths;

public final class JDKToolFinder {

    private JDKToolFinder() {
    }

    /**
     * Returns the full path to an executable in jdk/bin based on System
     * property {@code test.jdk} or {@code compile.jdk} (both are set by the jtreg test suite)
     *
     * @return Full path to an executable in jdk/bin
     */
    public static String getJDKTool(String tool) {

        // First try to find the executable in test.jdk
        try {
            return getTool(tool, "test.jdk");
        } catch (FileNotFoundException e) {

        }

        // Now see if it's available in compile.jdk
        try {
            return getTool(tool, "compile.jdk");
        } catch (FileNotFoundException e) {
            throw new RuntimeException("Failed to find " + tool +
                    ", looked in test.jdk (" + System.getProperty("test.jdk") +
                    ") and compile.jdk (" + System.getProperty("compile.jdk") + ")");
        }
    }

    /**
     * Returns the full path to an executable in jdk/bin based on System
     * property {@code compile.jdk}
     *
     * @return Full path to an executable in jdk/bin
     */
    public static String getCompileJDKTool(String tool) {
        try {
            return getTool(tool, "compile.jdk");
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Returns the full path to an executable in jdk/bin based on System
     * property {@code test.jdk}
     *
     * @return Full path to an executable in jdk/bin
     */
    public static String getTestJDKTool(String tool) {
        try {
            return getTool(tool, "test.jdk");
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
    }

    private static String getTool(String tool, String property) throws FileNotFoundException {
        String jdkPath = System.getProperty(property);

        if (jdkPath == null) {
            throw new RuntimeException(
                    "System property '" + property + "' not set. This property is normally set by jtreg. "
                    + "When running test separately, set this property using '-D" + property + "=/path/to/jdk'.");
        }

        Path toolName = Paths.get("bin", tool + (Platform.isWindows() ? ".exe" : ""));

        Path jdkTool = Paths.get(jdkPath, toolName.toString());
        if (!jdkTool.toFile().exists()) {
            throw new FileNotFoundException("Could not find file " + jdkTool.toAbsolutePath());
        }

        return jdkTool.toAbsolutePath().toString();
    }
}