/*
 * 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.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 test.jdk or 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) {
        String compileJdkPath   = System.getProperty("compile.jdk");
        String testJdkPath      = System.getProperty("test.jdk");

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

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

        // First try with test.jdk, if the tool can't be found there, check
        // compile.jdk
        Path testJdkTool = Paths.get(testJdkPath, toolName.toString());
        if (!testJdkTool.toFile().exists()) {
            Path compileJdkTool = Paths.get(compileJdkPath, toolName.toString());
            if (!compileJdkTool.toFile().exists()) {
                throw new RuntimeException("Failed to find " + tool +
                        ", looked in test.jdk (" + testJdkTool.toAbsolutePath() +
                        ") and compile.jdk (" + compileJdkTool.toAbsolutePath() + ")");
            }
            return compileJdkTool.toAbsolutePath().toString();
        }

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