#!/bin/sh
# set -x
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#
# Create a java command to launch an app client, based on the user's input.
# The client to run can be specified in several ways.
#
# -client x.jar
# a/b/c.class (path to a .class file)
# -client some-directory (rare, but possible)
# -mainClass pkg.MyMain (with no preceding -client; uses normal classpath)
# -jar x.jar (conventional java command syntax)
# a.b.MyMain (conventional java command syntax)
#
# Further, the appclient command may contain other java command
# options, such as property settings (-Dmy.color=blue), etc., which
# are passed through to the generated java command line.  As long as they
# precede the expression which determines the app client class to execute the
# java launcher will interpret them, just as with VM options on a normal
# java command.  Any options that appear later on the command line than those
# that determine the main class are passed to the client as arguments.
#
# If possible, the script launches the app client's main class directly,
# without launching the app client command processor first.  This happens
# if the user specifies a JAR (using -client or -jar) or a main class
# (using -mainclass with no preceding -client, or just by specifying the
# main class name).  In other cases, for example
# if the user specifies a directory or a class file, the script launches
# the app client command processor which will in turn launch the app client's
# main class.  Note that in these later cases the appclient container will
# display a user-provided splash screen as soon as possible but it cannot do
# so using the fast feature that is built in to the java launcher.
#


# accMainArgs contains agent arguments that let the ACC know
# how the java launcher chose which main class to start and ACC arguments
# and options which are not passed on the resulting command line.
accMainArgs=

# mainClassIdent indicates if the script has identified the main class and how
# definite that identification is.  For example, a user might supply
# multiple "-client <client-path>" settings on the command line.  By default,
# for compatibility with past releases, the last such setting take effect.
# The main class choice based on the -client option is tentative, because it
# can be overridden by a subsequent -client setting or by a -jar setting.
#
# A main class choice based java command line conventions (either a -jar setting
# or the first appearance of a lone argument, specifying the main class to execute)
# is final, as is a main class choice based on a user-supplied main class FILE.
#
# Because the main class choice can be overridden, until it becomes final, the
# script records the JVM settings for the main class separate from the
# accumulated JVM options; similarly for the ACC arguments which record the
# main class information for the ACC.
#

# The state variable "expecting" records which special keyword,
# if any, was just processed and therefore what value we expect next.
expecting=

jvmArgs=-Djava.system.class.loader=org.glassfish.appclient.client.acc.agent.ACCAgentClassLoader
if [ "$VMARGS" != "" ]; then
    jvmArgs=$jvmArgs\ $VMARGS
fi
# The environment variable extraACCArgsAsAppArgs will cause the script to
# place ACC arguments that appear once the main class has been specified
# as client arguments rather than redefinitions of the ACC arguments.  For
# example, without this setting turned on the command
#
# appclient -client x.jar -client y.jar
#
# will execute y.jar and ignore x.jar.  With the setting turned on the
# ACC will launch x.jar and -client y.jar will be the first application
# passed to the app client.
# extraACCArgsAsAppArgs=

recordAPPArg() {
    appArgs=$appArgs\ $1
}

recordClientArg() {
#
# We get here only if we should process this -client arg as a main
# class determinant.  If -client <client> follows another main class
# determinant and extra ACC args
# are to be treated as application arguments, control never reaches here.
#
    if [ "$mainClassIdent" = "" -o "$mainClassIdent" = "tentative" ]; then
        if [ -d $1 ]; then
            # -client with a directory
            jvmMainArgs=-jar\ \$accJar
            accMainArgs=client=dir=$1
        else
            # -client with a non-directory, so
            # the client had better be a JAR or an EAR
            if [ `expr $1 : '.*\.ear'` -ne 0 ] ; then
                jvmMainArgs=-jar\ "$accJar"
            else
                jvmMainArgs=-jar\ $1
            fi
            accMainArgs=client=jar=$1
        fi
        mainClassIdent=tentative
    else
        recordAPPArg -client
        recordAPPArg $1
    fi
}

recordACCArg() {
    if [ "$ACCArgType" = "APP" ]; then
        recordAPPArg $1
        if [ "$2" != "" ]; then
            recordAPPArg $2
        fi
    elif [ "$1" = "-client" ]; then

#       -client is handled a little differently

        recordClientArg $2
    else
        accArgs=$accArgs,arg=$1${2:+,arg=$2}
    fi
}

recordMainClass() {
    case $1 in
        -jar)
            if [ `expr $2 : '.*\.ear'` -ne 0 ] ; then
                jvmMainArgs=-jar\ "$accJar"
            else
                jvmMainArgs=-jar\ $2
            fi
            accMainArgs=client=jar=\"$2\"
            mainClassIdent=final ;;

        -client)
            if [ `expr $2 : '.*\.ear'` -ne 0 ] ; then
                jvmMainArgs=-jar\ "$accJar"
            else
                jvmMainArgs=-jar\ $2
            fi
            jvmMainArgs=-jar\ \"$2\"
            accMainArgs=client=jar=\"$2\"
            mainClassIdent=tentative ;;

        *.class)
            jvmMainArgs=-jar $accJar
            accMainArgs=client=classfile=\"$2\"
            mainClassIdent=final ;;

        *)
            jvmMainArgs=$1
            accMainArgs=client=class=$1
            mainClassIdent=final ;;
    esac

    # Change the ACC arg type now that we have seen the main class info if
    # the user wants extra ACC options and args passed to the client.

    if [ "$extraACCArgsAsAppArgs" != "" ]; then
        ACCArgType=APP
    fi

    # Change the JVM arg type also so further options that would otherwise
    # look like JVM ones are passed to the client.
    JVMArgType=APP
}

recordJVMArg() {
    if [ "$JVMArgType" = "APP" ]; then
        recordAPPArg $1
        if [ "$2" != "" ]; then
            recordAPPArg $2
        fi
    elif [ "$1" = "-jar" ]; then
        recordMainClass -jar $2
    else
        jvmArgs=$jvmArgs\ $1\ ${2:+$2}
    fi
}

recordNonACCOption() {
    if [ "$mainClassIdent" = "" ]; then
        recordJVMArg $1
    else
        recordAPPArg $1
    fi
}

recordLoneArg() {
#
# This argument is neither an option (it does not start with -) nor is it
# the value associated with a preceding option that accepts a value.
# If we have not yet seen the main class determinant then this is it.
# It could be a class file or a class name.

    if [ "$mainClassIdent" = "" ]; then
        # This is the main class or main class file.
        recordMainClass $1
    else
        # This must be an argument to the application client.
        recordAPPArg $1
    fi
}

# mainClassIdent can be undefined, tentative, or final

# Once we identify the main class information, further ACC arguments can
# either override earlier settings or can be passed as arguments to the client.
# ACCArgType indicates how ACC arguments will be handled.  It starts as ACC
# and will change to APP once we know the main class IF the user has requested
# that type of handling for "extra" ACC arguments.
#
# Similarly for arguments that would normally be recognized as JVM options; once
# the main class has been identified they will be treated as application arguments.
ACCArgType=ACC
JVMArgType=JVM

AS_INSTALL=`dirname $0`/..
AS_INSTALL_MOD=$AS_INSTALL/modules
accJar=$AS_INSTALL_MOD/gf-client.jar

# Record the default ACC config file if possible
recordACCArg -configxml "$AS_INSTALL/domains/domain1/config/sun-acc.xml"

for x do
    argType=APP  # unless we decide it is some other type later in the logic
    case $x in

        -classpath|-cp|-jar)
            expecting=$x
            expectingArgType=JVM ;;

        # The next case must refer to all valid ACC options that expect a value
        -client|-mainclass|-name|-xml|-configxml|-user|-password|-passwordfile|-targetserver)
            expecting=$x
            expectingArgType=ACC ;;

        # The next case must refer to all valid ACC options that expect no value
        -textauth|-noappinvoke|-usage|-help)
            recordACCArg $x; expecting=
            ;;

        -*)
            recordNonACCOption $x
            expecting=
            ;;

        *)
            if [ "$expecting" != "" ]; then
                record${expectingArgType}Arg $expecting $x
            else
                recordLoneArg $x
            fi
            expecting=
            ;;
    esac
done
if [ "$APPCPATH" != "" ]; then
    accArgs=$accArgs,appcpath=\"$APPCPATH\"
fi
if [ "$jvmMainArgs" = "" ]; then
    accMainArgs=-usage
    jvmMainArgs=-jar\ $accJar
fi
exec java $jvmArgs -javaagent:$accJar=mode=acscript${accArgs},$accMainArgs \
    $jvmMainArgs \
    $appArgs
