gistfile.txt

package com.sample.elasticsearch.plugins.sample;

import org.elasticsearch.common.Nullable;
import org.elasticsearch.index.fielddata.ScriptDocValues;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.plugins.ScriptPlugin;
import org.elasticsearch.script.AbstractDoubleSearchScript;
import org.elasticsearch.script.ExecutableScript;
import org.elasticsearch.script.NativeScriptFactory;

import java.util.Collections;
import java.util.List;
import java.util.Map;

public class MyNativeScriptPlugin extends Plugin implements ScriptPlugin {

    @Override
    public List<NativeScriptFactory> getNativeScripts() {
        return Collections.singletonList(new MyNativeScriptFactory());
    }

    public static class MyNativeScriptFactory implements NativeScriptFactory {

        @Override
        public ExecutableScript newScript(@Nullable Map<String, Object> params) {
            return new MyNativeScript();
        }

        @Override
        public boolean needsScores() {
            return false;
        }

        @Override
        public String getName() {
            return "my_script";
        }
    }

    public static class MyNativeScript extends AbstractDoubleSearchScript {

        @Override
        public double runAsDouble() {
            final ScriptDocValues.BytesRefs attrFlags = (ScriptDocValues.BytesRefs) doc().get("qa_data");
            //Example: Code which deserializes the byte array back for the plugin.
            //CustomData[] arr = CustomDataParser.deserialize(attrFlags.get(0).bytes);
            return arr[0].getUniqueId();
        }
    }
}