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+#!/bin/bash
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#######################################
+# A utility script to search for java. The order in which we look for java
+# goes from most specific to least specific, i.e.
+# ${DRUID_JAVA_HOME}
+# ${JAVA_HOME}
+# ${PATH}
+# Arguments:
+# None
+# Returns:
+# The bin folder of java if it exists, otherwise an empty string
+#######################################
+get_java_bin_dir() {
+ if [ ! -z "${DRUID_JAVA_HOME-}" ]; then
+ printf "$DRUID_JAVA_HOME/bin"
+ elif [ ! -z "${JAVA_HOME-}" ]; then
+ printf "$JAVA_HOME/bin"
+ elif [ ! -z "$(command -v java)" ]; then
+ # Strip /java from the location of where java is installed
+ JAVA_ON_PATH="$(command -v java)"
+ printf "${JAVA_ON_PATH%/java}"
+ else
+ printf ""
+ fi
+}