@echo off

rem Licensed to the Apache Software Foundation (ASF) under one or more

rem contributor license agreements.  See the NOTICE file distributed with

rem this work for additional information regarding copyright ownership.

rem The ASF licenses this file to You under the Apache License, Version 2.0

rem (the "License"); you may not use this file except in compliance with

rem the License.  You may obtain a copy of the License at

rem

rem     http://www.apache.org/licenses/LICENSE-2.0

rem

rem Unless required by applicable law or agreed to in writing, software

rem distributed under the License is distributed on an "AS IS" BASIS,

rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

rem See the License for the specific language governing permissions and

rem limitations under the License.

​

rem ---------------------------------------------------------------------------

rem Set JAVA_HOME or JRE_HOME if not already set, ensure any provided settings

rem are valid and consistent with the selected start-up options and set up the

rem endorsed directory.

rem ---------------------------------------------------------------------------

​

rem Make sure prerequisite environment variables are set

​

rem In debug mode we need a real JDK (JAVA_HOME)

if ""%1"" == ""debug"" goto needJavaHome

​

rem Otherwise either JRE or JDK are fine

if not "%JRE_HOME%" == "" goto gotJreHome

if not "%JAVA_HOME%" == "" goto gotJavaHome

echo Neither the JAVA_HOME nor the JRE_HOME environment variable is defined

echo At least one of these environment variable is needed to run this program

goto exit

​

:needJavaHome

rem Check if we have a usable JDK

if "%JAVA_HOME%" == "" goto noJavaHome

if not exist "%JAVA_HOME%\bin\java.exe" goto noJavaHome

if not exist "%JAVA_HOME%\bin\jdb.exe" goto noJavaHome

if not exist "%JAVA_HOME%\bin\javac.exe" goto noJavaHome

set "JRE_HOME=%JAVA_HOME%"

goto okJava

​