Initial commit

Rakefile

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+require 'fileutils'
+task :compile do 
+  source = FileList['**/*.java']
+  sh "javac #{source.collect {|s| "'#{s}'" }.join(' ')}  -classpath ../lib/elasticsearch-*.jar"
+end
+
+task :clean do
+  FileUtils::Verbose.rm Dir.glob("**/*.class")
+end
+
+task :package do
+  objects = FileList['**/*.class']
+  sh "jar cf MyNativeScript.jar #{objects.collect {|s| "'#{s}'" }.join(' ')}"
+end
+
+task :build => [:clean, :compile, :package]

org/spacevatican/elasticsearchexample/CustomScript.java

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+package org.spacevatican.elasticsearchexample;
+
+import org.elasticsearch.common.Nullable;
+import org.elasticsearch.script.ExecutableScript;
+import org.elasticsearch.script.NativeScriptFactory;
+import org.elasticsearch.script.AbstractDoubleSearchScript;
+import java.util.Map;
+import java.lang.Math;
+
+public class CustomScript extends AbstractDoubleSearchScript {
+
+    double base;
+    double exp;
+
+    public CustomScript(@Nullable Map<String,Object> params){
+      base = ((Double)params.get("base")).doubleValue();
+      exp = ((Double)params.get("exp")).doubleValue();
+    }
+
+    @Override
+    public double runAsDouble() {
+      double a = doc().numeric("a").getDoubleValue();
+
+      return a / Math.pow(base, exp);
+    }
+}

org/spacevatican/elasticsearchexample/CustomScriptFactory.java

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+package org.spacevatican.elasticsearchexample;
+
+import org.elasticsearch.common.Nullable;
+import org.elasticsearch.script.ExecutableScript;
+import org.elasticsearch.script.NativeScriptFactory;
+
+import org.spacevatican.elasticsearchexample.CustomScript;
+import java.util.Map;
+
+public class CustomScriptFactory implements NativeScriptFactory {
+
+  @Override public ExecutableScript newScript(@Nullable Map<String,Object> params){
+    return new CustomScript(params);
+  }
+
+}