Bash 3 compatibility

Motivation:

Mac OS X ships Bash 3, and it does not have an associative array
(declare -A).

Modifications:

Do not use an associative array.

Result:

Can run examples on Mac OS X using run-example.sh

run-example.sh

@@ -1,26 +1,29 @@
 #!/bin/bash -e
-declare -A EXAMPLE_MAP=(
-  ['spdy-server']='io.netty.example.spdy.server.SpdyServer'
-  ['spdy-client']='io.netty.example.spdy.client.SpdyClient'
+EXAMPLE_MAP=(
+  'spdy-server:io.netty.example.spdy.server.SpdyServer'
+  'spdy-client:io.netty.example.spdy.client.SpdyClient'
 )
 
 EXAMPLE=''
 EXAMPLE_CLASS=''
-EXAMPLE_ARGS=''
+EXAMPLE_ARGS='-D_'
 I=0
 
 while [[ $# -gt 0 ]]; do
   ARG="$1"
   shift
   if [[ "$ARG" =~ (^-.+) ]]; then
-    if [[ -z "$EXAMPLE_ARGS" ]]; then
-      EXAMPLE_ARGS="$ARG"
-    else
-      EXAMPLE_ARGS="$EXAMPLE_ARGS $ARG"
-    fi
+    EXAMPLE_ARGS="$EXAMPLE_ARGS $ARG"
   else
     EXAMPLE="$ARG"
-    EXAMPLE_CLASS="${EXAMPLE_MAP["$EXAMPLE"]}"
+    for E in "${EXAMPLE_MAP[@]}"; do
+      KEY="${E%%:*}"
+      VAL="${E##*:}"
+      if [[ "$EXAMPLE" == "$KEY" ]]; then
+        EXAMPLE_CLASS="$VAL"
+        break
+      fi
+    done
     break
   fi
 done
@@ -32,14 +35,14 @@ if [[ -z "$EXAMPLE" ]] || [[ -z "$EXAMPLE_CLASS" ]] || [[ $# -ne 0 ]]; then
   echo >&2
   echo "Available examples:" >&2
   echo >&2
-  for E in "${!EXAMPLE_MAP[@]}"; do
-    echo "  $E"
+  for E in "${EXAMPLE_MAP[@]}"; do
+    echo "  ${E%%:*}"
   done | sort >&2
   echo >&2
   exit 1
 fi
 
 cd "`dirname "$0"`"/example
 echo "[INFO] Running: $EXAMPLE ($EXAMPLE_CLASS $EXAMPLE_ARGS)"
-exec mvn -nsu compile exec:exec -DargLine.example="$EXAMPLE_ARGS" -DexampleClass="$EXAMPLE_CLASS"
+exec mvn -X -nsu compile exec:exec -DargLine.example="$EXAMPLE_ARGS" -DexampleClass="$EXAMPLE_CLASS"