#!/bin/bash

# first arg can be a numeric version, or a folder in /usr/lib/jvm/
jdk="$1"
shift

JAVA_HOME="/usr/lib/jvm/$jdk"

M2_HOME="/opt/maven"

if [ ! -d "$JAVA_HOME" ]
then
    # it's probably a number
    JAVA_VERSION="$jdk"

    case "$JAVA_VERSION" in
        6)
            jdk=java-6-jdk
            ;;
        7)
            jdk=java-7-openjdk
            ;;
        8)
            jdk=java-8-openjdk
            ;;
        9)
            jdk=jdk-9
            ;;
        10)
            jdk=jdk-10
            ;;
        11)
            jdk=java-11-openjdk
            ;;
        12)
            jdk=jdk-12
            ;;
        13)
            jdk=jdk-13
            ;;
        14)
            jdk=java-14-openjdk
            ;;
        15)
            jdk=jdk-15
            ;;
        16)
            jdk=jdk-16
            ;;
        *)
            echo "run-java: unknown jdk: $jdk"
            exit 1
            ;;
    esac

    JAVA_HOME="/usr/lib/jvm/$jdk"
else
    # it's a folder
    JAVA_VERSION="$(echo "$jdk" | grep -Eo '[0-9]+')"
fi

# maven 3.2.5 is the latest version supported by 6
[ $JAVA_VERSION -eq 6 ] && export M2_HOME="/opt/apache-maven-3.2.5"

JAVA_VERSION=$JAVA_VERSION M2_HOME="$M2_HOME" JAVA_HOME="$JAVA_HOME" PATH="$JAVA_HOME/bin:$M2_HOME/bin:$PATH" exec "$@"